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#
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# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import annotations

import collections.abc
import contextlib
import hashlib
import itertools
import logging
import math
import operator
import os
import signal
import warnings
from collections import defaultdict
from datetime import timedelta
from enum import Enum
from typing import TYPE_CHECKING, Any, Callable, Collection, Generator, Iterable, Mapping, Tuple
from urllib.parse import quote

import dill
import jinja2
import lazy_object_proxy
import pendulum
from jinja2 import TemplateAssertionError, UndefinedError
from sqlalchemy import (
    Column,
    DateTime,
    Float,
    ForeignKey,
    ForeignKeyConstraint,
    Index,
    Integer,
    PrimaryKeyConstraint,
    String,
    Text,
    and_,
    delete,
    false,
    func,
    inspect,
    or_,
    text,
    update,
)
from sqlalchemy.ext.associationproxy import association_proxy
from sqlalchemy.ext.mutable import MutableDict
from sqlalchemy.orm import reconstructor, relationship
from sqlalchemy.orm.attributes import NO_VALUE, set_committed_value
from sqlalchemy.sql.expression import case, select

from airflow import settings
from airflow.api_internal.internal_api_call import internal_api_call
from airflow.compat.functools import cache
from airflow.configuration import conf
from airflow.datasets import Dataset
from airflow.datasets.manager import dataset_manager
from airflow.exceptions import (
    AirflowException,
    AirflowFailException,
    AirflowRescheduleException,
    AirflowSensorTimeout,
    AirflowSkipException,
    AirflowTaskTerminated,
    AirflowTaskTimeout,
    DagRunNotFound,
    RemovedInAirflow3Warning,
    TaskDeferred,
    UnmappableXComLengthPushed,
    UnmappableXComTypePushed,
    XComForMappingNotPushed,
)
from airflow.listeners.listener import get_listener_manager
from airflow.models.base import Base, StringID, TaskInstanceDependencies, _sentinel
from airflow.models.dagbag import DagBag
from airflow.models.log import Log
from airflow.models.mappedoperator import MappedOperator
from airflow.models.param import process_params
from airflow.models.taskfail import TaskFail
from airflow.models.taskinstancekey import TaskInstanceKey
from airflow.models.taskmap import TaskMap
from airflow.models.taskreschedule import TaskReschedule
from airflow.models.xcom import LazyXComAccess, XCom
from airflow.plugins_manager import integrate_macros_plugins
from airflow.sentry import Sentry
from airflow.settings import task_instance_mutation_hook
from airflow.stats import Stats
from airflow.templates import SandboxedEnvironment
from airflow.ti_deps.dep_context import DepContext
from airflow.ti_deps.dependencies_deps import REQUEUEABLE_DEPS, RUNNING_DEPS
from airflow.utils import timezone
from airflow.utils.context import ConnectionAccessor, Context, VariableAccessor, context_merge
from airflow.utils.email import send_email
from airflow.utils.helpers import prune_dict, render_template_to_string
from airflow.utils.log.logging_mixin import LoggingMixin
from airflow.utils.module_loading import qualname
from airflow.utils.net import get_hostname
from airflow.utils.operator_helpers import context_to_airflow_vars
from airflow.utils.platform import getuser
from airflow.utils.retries import run_with_db_retries
from airflow.utils.session import NEW_SESSION, create_session, provide_session
from airflow.utils.sqlalchemy import (
    ExecutorConfigType,
    ExtendedJSON,
    UtcDateTime,
    tuple_in_condition,
    with_row_locks,
)
from airflow.utils.state import DagRunState, JobState, State, TaskInstanceState
from airflow.utils.task_group import MappedTaskGroup
from airflow.utils.task_instance_session import set_current_task_instance_session
from airflow.utils.timeout import timeout
from airflow.utils.xcom import XCOM_RETURN_KEY

TR = TaskReschedule

_CURRENT_CONTEXT: list[Context] = []
log = logging.getLogger(__name__)


if TYPE_CHECKING:
    from datetime import datetime
    from pathlib import PurePath
    from types import TracebackType

    from sqlalchemy.orm.session import Session
    from sqlalchemy.sql.elements import BooleanClauseList
    from sqlalchemy.sql.expression import ColumnOperators

    from airflow.models.abstractoperator import TaskStateChangeCallback
    from airflow.models.baseoperator import BaseOperator
    from airflow.models.dag import DAG, DagModel
    from airflow.models.dagrun import DagRun
    from airflow.models.dataset import DatasetEvent
    from airflow.models.operator import Operator
    from airflow.serialization.pydantic.dag import DagModelPydantic
    from airflow.serialization.pydantic.dataset import DatasetEventPydantic
    from airflow.serialization.pydantic.taskinstance import TaskInstancePydantic
    from airflow.timetables.base import DataInterval
    from airflow.typing_compat import Literal, TypeGuard
    from airflow.utils.task_group import TaskGroup

    # This is a workaround because mypy doesn't work with hybrid_property
    # TODO: remove this hack and move hybrid_property back to main import block
    # See https://github.com/python/mypy/issues/4430
    hybrid_property = property
else:
    from sqlalchemy.ext.hybrid import hybrid_property


PAST_DEPENDS_MET = "past_depends_met"


class TaskReturnCode(Enum):
    """
    Enum to signal manner of exit for task run command.

    :meta private:
    """

    DEFERRED = 100
    """When task exits with deferral to trigger."""


@contextlib.contextmanager
def set_current_context(context: Context) -> Generator[Context, None, None]:
    """
    Set the current execution context to the provided context object.

    This method should be called once per Task execution, before calling operator.execute.
    """
    _CURRENT_CONTEXT.append(context)
    try:
        yield context
    finally:
        expected_state = _CURRENT_CONTEXT.pop()
        if expected_state != context:
            log.warning(
                "Current context is not equal to the state at context stack. Expected=%s, got=%s",
                context,
                expected_state,
            )


def _stop_remaining_tasks(*, task_instance: TaskInstance | TaskInstancePydantic, session: Session):
    """
    Stop non-teardown tasks in dag.

    :meta private:
    """
    if not task_instance.dag_run:
        raise ValueError("``task_instance`` must have ``dag_run`` set")
    tis = task_instance.dag_run.get_task_instances(session=session)
    if TYPE_CHECKING:
        assert task_instance.task
        assert isinstance(task_instance.task.dag, DAG)

    for ti in tis:
        if ti.task_id == task_instance.task_id or ti.state in (
            TaskInstanceState.SUCCESS,
            TaskInstanceState.FAILED,
        ):
            continue
        task = task_instance.task.dag.task_dict[ti.task_id]
        if not task.is_teardown:
            if ti.state == TaskInstanceState.RUNNING:
                log.info("Forcing task %s to fail due to dag's `fail_stop` setting", ti.task_id)
                ti.error(session)
            else:
                log.info("Setting task %s to SKIPPED due to dag's `fail_stop` setting.", ti.task_id)
                ti.set_state(state=TaskInstanceState.SKIPPED, session=session)
        else:
            log.info("Not skipping teardown task '%s'", ti.task_id)


def clear_task_instances(
    tis: list[TaskInstance],
    session: Session,
    activate_dag_runs: None = None,
    dag: DAG | None = None,
    dag_run_state: DagRunState | Literal[False] = DagRunState.QUEUED,
) -> None:
    """
    Clear a set of task instances, but make sure the running ones get killed.

    Also sets Dagrun's `state` to QUEUED and `start_date` to the time of execution.
    But only for finished DRs (SUCCESS and FAILED).
    Doesn't clear DR's `state` and `start_date`for running
    DRs (QUEUED and RUNNING) because clearing the state for already
    running DR is redundant and clearing `start_date` affects DR's duration.

    :param tis: a list of task instances
    :param session: current session
    :param dag_run_state: state to set finished DagRuns to.
        If set to False, DagRuns state will not be changed.
    :param dag: DAG object
    :param activate_dag_runs: Deprecated parameter, do not pass
    """
    job_ids = []
    # Keys: dag_id -> run_id -> map_indexes -> try_numbers -> task_id
    task_id_by_key: dict[str, dict[str, dict[int, dict[int, set[str]]]]] = defaultdict(
        lambda: defaultdict(lambda: defaultdict(lambda: defaultdict(set)))
    )
    dag_bag = DagBag(read_dags_from_db=True)
    for ti in tis:
        if ti.state == TaskInstanceState.RUNNING:
            if ti.job_id:
                # If a task is cleared when running, set its state to RESTARTING so that
                # the task is terminated and becomes eligible for retry.
                ti.state = TaskInstanceState.RESTARTING
                job_ids.append(ti.job_id)
        else:
            ti_dag = dag if dag and dag.dag_id == ti.dag_id else dag_bag.get_dag(ti.dag_id, session=session)
            task_id = ti.task_id
            if ti_dag and ti_dag.has_task(task_id):
                task = ti_dag.get_task(task_id)
                ti.refresh_from_task(task)
                if TYPE_CHECKING:
                    assert ti.task
                task_retries = task.retries
                ti.max_tries = ti.try_number + task_retries - 1
            else:
                # Ignore errors when updating max_tries if the DAG or
                # task are not found since database records could be
                # outdated. We make max_tries the maximum value of its
                # original max_tries or the last attempted try number.
                ti.max_tries = max(ti.max_tries, ti.prev_attempted_tries)
            ti.state = None
            ti.external_executor_id = None
            ti.clear_next_method_args()
            session.merge(ti)

        task_id_by_key[ti.dag_id][ti.run_id][ti.map_index][ti.try_number].add(ti.task_id)

    if task_id_by_key:
        # Clear all reschedules related to the ti to clear

        # This is an optimization for the common case where all tis are for a small number
        # of dag_id, run_id, try_number, and map_index. Use a nested dict of dag_id,
        # run_id, try_number, map_index, and task_id to construct the where clause in a
        # hierarchical manner. This speeds up the delete statement by more than 40x for
        # large number of tis (50k+).
        conditions = or_(
            and_(
                TR.dag_id == dag_id,
                or_(
                    and_(
                        TR.run_id == run_id,
                        or_(
                            and_(
                                TR.map_index == map_index,
                                or_(
                                    and_(TR.try_number == try_number, TR.task_id.in_(task_ids))
                                    for try_number, task_ids in task_tries.items()
                                ),
                            )
                            for map_index, task_tries in map_indexes.items()
                        ),
                    )
                    for run_id, map_indexes in run_ids.items()
                ),
            )
            for dag_id, run_ids in task_id_by_key.items()
        )

        delete_qry = TR.__table__.delete().where(conditions)
        session.execute(delete_qry)

    if job_ids:
        from airflow.jobs.job import Job

        session.execute(update(Job).where(Job.id.in_(job_ids)).values(state=JobState.RESTARTING))

    if activate_dag_runs is not None:
        warnings.warn(
            "`activate_dag_runs` parameter to clear_task_instances function is deprecated. "
            "Please use `dag_run_state`",
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        if not activate_dag_runs:
            dag_run_state = False

    if dag_run_state is not False and tis:
        from airflow.models.dagrun import DagRun  # Avoid circular import

        run_ids_by_dag_id = defaultdict(set)
        for instance in tis:
            run_ids_by_dag_id[instance.dag_id].add(instance.run_id)

        drs = (
            session.query(DagRun)
            .filter(
                or_(
                    and_(DagRun.dag_id == dag_id, DagRun.run_id.in_(run_ids))
                    for dag_id, run_ids in run_ids_by_dag_id.items()
                )
            )
            .all()
        )
        dag_run_state = DagRunState(dag_run_state)  # Validate the state value.
        for dr in drs:
            if dr.state in State.finished_dr_states:
                dr.state = dag_run_state
                dr.start_date = timezone.utcnow()
                if dag_run_state == DagRunState.QUEUED:
                    dr.last_scheduling_decision = None
                    dr.start_date = None
                    dr.clear_number += 1
    session.flush()


def _is_mappable_value(value: Any) -> TypeGuard[Collection]:
    """Whether a value can be used for task mapping.

    We only allow collections with guaranteed ordering, but exclude character
    sequences since that's usually not what users would expect to be mappable.
    """
    if not isinstance(value, (collections.abc.Sequence, dict)):
        return False
    if isinstance(value, (bytearray, bytes, str)):
        return False
    return True


def _creator_note(val):
    """Creator the ``note`` association proxy."""
    if isinstance(val, str):
        return TaskInstanceNote(content=val)
    elif isinstance(val, dict):
        return TaskInstanceNote(**val)
    else:
        return TaskInstanceNote(*val)


def _execute_task(task_instance: TaskInstance | TaskInstancePydantic, context: Context, task_orig: Operator):
    """
    Execute Task (optionally with a Timeout) and push Xcom results.

    :param task_instance: the task instance
    :param context: Jinja2 context
    :param task_orig: origin task

    :meta private:
    """
    task_to_execute = task_instance.task

    if TYPE_CHECKING:
        assert task_to_execute

    if isinstance(task_to_execute, MappedOperator):
        raise AirflowException("MappedOperator cannot be executed.")

    # If the task has been deferred and is being executed due to a trigger,
    # then we need to pick the right method to come back to, otherwise
    # we go for the default execute
    execute_callable_kwargs: dict[str, Any] = {}
    execute_callable: Callable
    if task_instance.next_method:
        if task_instance.next_method == "execute":
            if not task_instance.next_kwargs:
                task_instance.next_kwargs = {}
            task_instance.next_kwargs[f"{task_to_execute.__class__.__name__}__sentinel"] = _sentinel
        execute_callable = task_to_execute.resume_execution
        execute_callable_kwargs["next_method"] = task_instance.next_method
        execute_callable_kwargs["next_kwargs"] = task_instance.next_kwargs
    else:
        execute_callable = task_to_execute.execute
        if execute_callable.__name__ == "execute":
            execute_callable_kwargs[f"{task_to_execute.__class__.__name__}__sentinel"] = _sentinel

    def _execute_callable(context, **execute_callable_kwargs):
        try:
            # Print a marker for log grouping of details before task execution
            log.info("::endgroup::")

            return execute_callable(context=context, **execute_callable_kwargs)
        except SystemExit as e:
            # Handle only successful cases here. Failure cases will be handled upper
            # in the exception chain.
            if e.code is not None and e.code != 0:
                raise
            return None
        finally:
            # Print a marker post execution for internals of post task processing
            log.info("::group::Post task execution logs")

    # If a timeout is specified for the task, make it fail
    # if it goes beyond
    if task_to_execute.execution_timeout:
        # If we are coming in with a next_method (i.e. from a deferral),
        # calculate the timeout from our start_date.
        if task_instance.next_method and task_instance.start_date:
            timeout_seconds = (
                task_to_execute.execution_timeout - (timezone.utcnow() - task_instance.start_date)
            ).total_seconds()
        else:
            timeout_seconds = task_to_execute.execution_timeout.total_seconds()
        try:
            # It's possible we're already timed out, so fast-fail if true
            if timeout_seconds <= 0:
                raise AirflowTaskTimeout()
            # Run task in timeout wrapper
            with timeout(timeout_seconds):
                result = _execute_callable(context=context, **execute_callable_kwargs)
        except AirflowTaskTimeout:
            task_to_execute.on_kill()
            raise
    else:
        result = _execute_callable(context=context, **execute_callable_kwargs)
    with create_session() as session:
        if task_to_execute.do_xcom_push:
            xcom_value = result
        else:
            xcom_value = None
        if xcom_value is not None:  # If the task returns a result, push an XCom containing it.
            if task_to_execute.multiple_outputs:
                if not isinstance(xcom_value, Mapping):
                    raise AirflowException(
                        f"Returned output was type {type(xcom_value)} "
                        "expected dictionary for multiple_outputs"
                    )
                for key in xcom_value.keys():
                    if not isinstance(key, str):
                        raise AirflowException(
                            "Returned dictionary keys must be strings when using "
                            f"multiple_outputs, found {key} ({type(key)}) instead"
                        )
                for key, value in xcom_value.items():
                    task_instance.xcom_push(key=key, value=value, session=session)
            task_instance.xcom_push(key=XCOM_RETURN_KEY, value=xcom_value, session=session)
        _record_task_map_for_downstreams(
            task_instance=task_instance, task=task_orig, value=xcom_value, session=session
        )
    return result


def _refresh_from_db(
    *, task_instance: TaskInstance | TaskInstancePydantic, session: Session, lock_for_update: bool = False
) -> None:
    """
    Refresh the task instance from the database based on the primary key.

    :param task_instance: the task instance
    :param session: SQLAlchemy ORM Session
    :param lock_for_update: if True, indicates that the database should
        lock the TaskInstance (issuing a FOR UPDATE clause) until the
        session is committed.

    :meta private:
    """
    if task_instance in session:
        session.refresh(task_instance, TaskInstance.__mapper__.column_attrs.keys())

    ti = TaskInstance.get_task_instance(
        dag_id=task_instance.dag_id,
        task_id=task_instance.task_id,
        run_id=task_instance.run_id,
        map_index=task_instance.map_index,
        select_columns=True,
        lock_for_update=lock_for_update,
        session=session,
    )

    if ti:
        # Fields ordered per model definition
        task_instance.start_date = ti.start_date
        task_instance.end_date = ti.end_date
        task_instance.duration = ti.duration
        task_instance.state = ti.state
        # Since we selected columns, not the object, this is the raw value
        task_instance.try_number = ti.try_number
        task_instance.max_tries = ti.max_tries
        task_instance.hostname = ti.hostname
        task_instance.unixname = ti.unixname
        task_instance.job_id = ti.job_id
        task_instance.pool = ti.pool
        task_instance.pool_slots = ti.pool_slots or 1
        task_instance.queue = ti.queue
        task_instance.priority_weight = ti.priority_weight
        task_instance.operator = ti.operator
        task_instance.custom_operator_name = ti.custom_operator_name
        task_instance.queued_dttm = ti.queued_dttm
        task_instance.queued_by_job_id = ti.queued_by_job_id
        task_instance.pid = ti.pid
        task_instance.executor_config = ti.executor_config
        task_instance.external_executor_id = ti.external_executor_id
        task_instance.trigger_id = ti.trigger_id
        task_instance.next_method = ti.next_method
        task_instance.next_kwargs = ti.next_kwargs
    else:
        task_instance.state = None


def _set_duration(*, task_instance: TaskInstance | TaskInstancePydantic) -> None:
    """
    Set task instance duration.

    :param task_instance: the task instance

    :meta private:
    """
    if task_instance.end_date and task_instance.start_date:
        task_instance.duration = (task_instance.end_date - task_instance.start_date).total_seconds()
    else:
        task_instance.duration = None
    log.debug("Task Duration set to %s", task_instance.duration)


def _stats_tags(*, task_instance: TaskInstance | TaskInstancePydantic) -> dict[str, str]:
    """
    Return task instance tags.

    :param task_instance: the task instance

    :meta private:
    """
    return prune_dict({"dag_id": task_instance.dag_id, "task_id": task_instance.task_id})


def _clear_next_method_args(*, task_instance: TaskInstance | TaskInstancePydantic) -> None:
    """
    Ensure we unset next_method and next_kwargs to ensure that any retries don't reuse them.

    :param task_instance: the task instance

    :meta private:
    """
    log.debug("Clearing next_method and next_kwargs.")

    task_instance.next_method = None
    task_instance.next_kwargs = None


def _get_template_context(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    session: Session | None = None,
    ignore_param_exceptions: bool = True,
) -> Context:
    """
    Return TI Context.

    :param task_instance: the task instance
    :param session: SQLAlchemy ORM Session
    :param ignore_param_exceptions: flag to suppress value exceptions while initializing the ParamsDict

    :meta private:
    """
    # Do not use provide_session here -- it expunges everything on exit!
    if not session:
        session = settings.Session()

    from airflow import macros
    from airflow.models.abstractoperator import NotMapped

    integrate_macros_plugins()

    task = task_instance.task
    if TYPE_CHECKING:
        assert task
        assert task.dag
    dag: DAG = task.dag

    dag_run = task_instance.get_dagrun(session)
    data_interval = dag.get_run_data_interval(dag_run)

    validated_params = process_params(dag, task, dag_run, suppress_exception=ignore_param_exceptions)

    logical_date: DateTime = timezone.coerce_datetime(task_instance.execution_date)
    ds = logical_date.strftime("%Y-%m-%d")
    ds_nodash = ds.replace("-", "")
    ts = logical_date.isoformat()
    ts_nodash = logical_date.strftime("%Y%m%dT%H%M%S")
    ts_nodash_with_tz = ts.replace("-", "").replace(":", "")

    @cache  # Prevent multiple database access.
    def _get_previous_dagrun_success() -> DagRun | None:
        return task_instance.get_previous_dagrun(state=DagRunState.SUCCESS, session=session)

    def _get_previous_dagrun_data_interval_success() -> DataInterval | None:
        dagrun = _get_previous_dagrun_success()
        if dagrun is None:
            return None
        return dag.get_run_data_interval(dagrun)

    def get_prev_data_interval_start_success() -> pendulum.DateTime | None:
        data_interval = _get_previous_dagrun_data_interval_success()
        if data_interval is None:
            return None
        return data_interval.start

    def get_prev_data_interval_end_success() -> pendulum.DateTime | None:
        data_interval = _get_previous_dagrun_data_interval_success()
        if data_interval is None:
            return None
        return data_interval.end

    def get_prev_start_date_success() -> pendulum.DateTime | None:
        dagrun = _get_previous_dagrun_success()
        if dagrun is None:
            return None
        return timezone.coerce_datetime(dagrun.start_date)

    def get_prev_end_date_success() -> pendulum.DateTime | None:
        dagrun = _get_previous_dagrun_success()
        if dagrun is None:
            return None
        return timezone.coerce_datetime(dagrun.end_date)

    @cache
    def get_yesterday_ds() -> str:
        return (logical_date - timedelta(1)).strftime("%Y-%m-%d")

    def get_yesterday_ds_nodash() -> str:
        return get_yesterday_ds().replace("-", "")

    @cache
    def get_tomorrow_ds() -> str:
        return (logical_date + timedelta(1)).strftime("%Y-%m-%d")

    def get_tomorrow_ds_nodash() -> str:
        return get_tomorrow_ds().replace("-", "")

    @cache
    def get_next_execution_date() -> pendulum.DateTime | None:
        # For manually triggered dagruns that aren't run on a schedule,
        # the "next" execution date doesn't make sense, and should be set
        # to execution date for consistency with how execution_date is set
        # for manually triggered tasks, i.e. triggered_date == execution_date.
        if dag_run.external_trigger:
            return logical_date
        if dag is None:
            return None
        next_info = dag.next_dagrun_info(data_interval, restricted=False)
        if next_info is None:
            return None
        return timezone.coerce_datetime(next_info.logical_date)

    def get_next_ds() -> str | None:
        execution_date = get_next_execution_date()
        if execution_date is None:
            return None
        return execution_date.strftime("%Y-%m-%d")

    def get_next_ds_nodash() -> str | None:
        ds = get_next_ds()
        if ds is None:
            return ds
        return ds.replace("-", "")

    @cache
    def get_prev_execution_date():
        # For manually triggered dagruns that aren't run on a schedule,
        # the "previous" execution date doesn't make sense, and should be set
        # to execution date for consistency with how execution_date is set
        # for manually triggered tasks, i.e. triggered_date == execution_date.
        if dag_run.external_trigger:
            return logical_date
        with warnings.catch_warnings():
            warnings.simplefilter("ignore", RemovedInAirflow3Warning)
            return dag.previous_schedule(logical_date)

    @cache
    def get_prev_ds() -> str | None:
        execution_date = get_prev_execution_date()
        if execution_date is None:
            return None
        return execution_date.strftime("%Y-%m-%d")

    def get_prev_ds_nodash() -> str | None:
        prev_ds = get_prev_ds()
        if prev_ds is None:
            return None
        return prev_ds.replace("-", "")

    def get_triggering_events() -> dict[str, list[DatasetEvent | DatasetEventPydantic]]:
        if TYPE_CHECKING:
            assert session is not None

        # The dag_run may not be attached to the session anymore since the
        # code base is over-zealous with use of session.expunge_all().
        # Re-attach it if we get called.
        nonlocal dag_run
        if dag_run not in session:
            dag_run = session.merge(dag_run, load=False)

        dataset_events = dag_run.consumed_dataset_events
        triggering_events: dict[str, list[DatasetEvent | DatasetEventPydantic]] = defaultdict(list)
        for event in dataset_events:
            if event.dataset:
                triggering_events[event.dataset.uri].append(event)

        return triggering_events

    try:
        expanded_ti_count: int | None = task.get_mapped_ti_count(task_instance.run_id, session=session)
    except NotMapped:
        expanded_ti_count = None

    # NOTE: If you add to this dict, make sure to also update the following:
    # * Context in airflow/utils/context.pyi
    # * KNOWN_CONTEXT_KEYS in airflow/utils/context.py
    # * Table in docs/apache-airflow/templates-ref.rst
    context: dict[str, Any] = {
        "conf": conf,
        "dag": dag,
        "dag_run": dag_run,
        "data_interval_end": timezone.coerce_datetime(data_interval.end),
        "data_interval_start": timezone.coerce_datetime(data_interval.start),
        "ds": ds,
        "ds_nodash": ds_nodash,
        "execution_date": logical_date,
        "expanded_ti_count": expanded_ti_count,
        "inlets": task.inlets,
        "logical_date": logical_date,
        "macros": macros,
        "map_index_template": task.map_index_template,
        "next_ds": get_next_ds(),
        "next_ds_nodash": get_next_ds_nodash(),
        "next_execution_date": get_next_execution_date(),
        "outlets": task.outlets,
        "params": validated_params,
        "prev_data_interval_start_success": get_prev_data_interval_start_success(),
        "prev_data_interval_end_success": get_prev_data_interval_end_success(),
        "prev_ds": get_prev_ds(),
        "prev_ds_nodash": get_prev_ds_nodash(),
        "prev_execution_date": get_prev_execution_date(),
        "prev_execution_date_success": task_instance.get_previous_execution_date(
            state=DagRunState.SUCCESS,
            session=session,
        ),
        "prev_start_date_success": get_prev_start_date_success(),
        "prev_end_date_success": get_prev_end_date_success(),
        "run_id": task_instance.run_id,
        "task": task,
        "task_instance": task_instance,
        "task_instance_key_str": f"{task.dag_id}__{task.task_id}__{ds_nodash}",
        "test_mode": task_instance.test_mode,
        "ti": task_instance,
        "tomorrow_ds": get_tomorrow_ds(),
        "tomorrow_ds_nodash": get_tomorrow_ds_nodash(),
        "triggering_dataset_events": lazy_object_proxy.Proxy(get_triggering_events),
        "ts": ts,
        "ts_nodash": ts_nodash,
        "ts_nodash_with_tz": ts_nodash_with_tz,
        "var": {
            "json": VariableAccessor(deserialize_json=True),
            "value": VariableAccessor(deserialize_json=False),
        },
        "conn": ConnectionAccessor(),
        "yesterday_ds": get_yesterday_ds(),
        "yesterday_ds_nodash": get_yesterday_ds_nodash(),
    }
    # Mypy doesn't like turning existing dicts in to a TypeDict -- and we "lie" in the type stub to say it
    # is one, but in practice it isn't. See https://github.com/python/mypy/issues/8890
    return Context(context)  # type: ignore


def _is_eligible_to_retry(*, task_instance: TaskInstance | TaskInstancePydantic):
    """
    Is task instance is eligible for retry.

    :param task_instance: the task instance

    :meta private:
    """
    if task_instance.state == TaskInstanceState.RESTARTING:
        # If a task is cleared when running, it goes into RESTARTING state and is always
        # eligible for retry
        return True
    if not getattr(task_instance, "task", None):
        # Couldn't load the task, don't know number of retries, guess:
        return task_instance.try_number <= task_instance.max_tries

    if TYPE_CHECKING:
        assert task_instance.task

    return task_instance.task.retries and task_instance.try_number <= task_instance.max_tries


def _handle_failure(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    error: None | str | BaseException,
    session: Session,
    test_mode: bool | None = None,
    context: Context | None = None,
    force_fail: bool = False,
) -> None:
    """
    Handle Failure for a task instance.

    :param task_instance: the task instance
    :param error: if specified, log the specific exception if thrown
    :param session: SQLAlchemy ORM Session
    :param test_mode: doesn't record success or failure in the DB if True
    :param context: Jinja2 context
    :param force_fail: if True, task does not retry

    :meta private:
    """
    if test_mode is None:
        test_mode = task_instance.test_mode

    failure_context = TaskInstance.fetch_handle_failure_context(
        ti=task_instance,
        error=error,
        test_mode=test_mode,
        context=context,
        force_fail=force_fail,
        session=session,
    )

    _log_state(task_instance=task_instance, lead_msg="Immediate failure requested. " if force_fail else "")
    if (
        failure_context["task"]
        and failure_context["email_for_state"](failure_context["task"])
        and failure_context["task"].email
    ):
        try:
            task_instance.email_alert(error, failure_context["task"])
        except Exception:
            log.exception("Failed to send email to: %s", failure_context["task"].email)

    if failure_context["callbacks"] and failure_context["context"]:
        _run_finished_callback(
            callbacks=failure_context["callbacks"],
            context=failure_context["context"],
        )

    if not test_mode:
        TaskInstance.save_to_db(failure_context["ti"], session)


def _get_try_number(*, task_instance: TaskInstance | TaskInstancePydantic):
    """
    Return the try number that a task number will be when it is actually run.

    If the TaskInstance is currently running, this will match the column in the
    database, in all other cases this will be incremented.

    This is designed so that task logs end up in the right file.

    :param task_instance: the task instance

    :meta private:
    """
    if task_instance.state == TaskInstanceState.RUNNING.RUNNING:
        return task_instance._try_number
    return task_instance._try_number + 1


def _set_try_number(*, task_instance: TaskInstance | TaskInstancePydantic, value: int) -> None:
    """
    Set a task try number.

    :param task_instance: the task instance
    :param value: the try number

    :meta private:
    """
    task_instance._try_number = value


def _refresh_from_task(
    *, task_instance: TaskInstance | TaskInstancePydantic, task: Operator, pool_override: str | None = None
) -> None:
    """
    Copy common attributes from the given task.

    :param task_instance: the task instance
    :param task: The task object to copy from
    :param pool_override: Use the pool_override instead of task's pool

    :meta private:
    """
    task_instance.task = task
    task_instance.queue = task.queue
    task_instance.pool = pool_override or task.pool
    task_instance.pool_slots = task.pool_slots
    with contextlib.suppress(Exception):
        # This method is called from the different places, and sometimes the TI is not fully initialized
        task_instance.priority_weight = task_instance.task.weight_rule.get_weight(
            task_instance  # type: ignore[arg-type]
        )
    task_instance.run_as_user = task.run_as_user
    # Do not set max_tries to task.retries here because max_tries is a cumulative
    # value that needs to be stored in the db.
    task_instance.executor_config = task.executor_config
    task_instance.operator = task.task_type
    task_instance.custom_operator_name = getattr(task, "custom_operator_name", None)
    # Re-apply cluster policy here so that task default do not overload previous data
    task_instance_mutation_hook(task_instance)


def _record_task_map_for_downstreams(
    *, task_instance: TaskInstance | TaskInstancePydantic, task: Operator, value: Any, session: Session
) -> None:
    """
    Record the task map for downstream tasks.

    :param task_instance: the task instance
    :param task: The task object
    :param value: The value
    :param session: SQLAlchemy ORM Session

    :meta private:
    """
    if next(task.iter_mapped_dependants(), None) is None:  # No mapped dependants, no need to validate.
        return
    # TODO: We don't push TaskMap for mapped task instances because it's not
    # currently possible for a downstream to depend on one individual mapped
    # task instance. This will change when we implement task mapping inside
    # a mapped task group, and we'll need to further analyze the case.
    if isinstance(task, MappedOperator):
        return
    if value is None:
        raise XComForMappingNotPushed()
    if not _is_mappable_value(value):
        raise UnmappableXComTypePushed(value)
    task_map = TaskMap.from_task_instance_xcom(task_instance, value)
    max_map_length = conf.getint("core", "max_map_length", fallback=1024)
    if task_map.length > max_map_length:
        raise UnmappableXComLengthPushed(value, max_map_length)
    session.merge(task_map)


def _get_previous_dagrun(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    state: DagRunState | None = None,
    session: Session | None = None,
) -> DagRun | None:
    """
    Return the DagRun that ran prior to this task instance's DagRun.

    :param task_instance: the task instance
    :param state: If passed, it only take into account instances of a specific state.
    :param session: SQLAlchemy ORM Session.

    :meta private:
    """
    if TYPE_CHECKING:
        assert task_instance.task

    dag = task_instance.task.dag
    if dag is None:
        return None

    dr = task_instance.get_dagrun(session=session)
    dr.dag = dag

    from airflow.models.dagrun import DagRun  # Avoid circular import

    # We always ignore schedule in dagrun lookup when `state` is given
    # or the DAG is never scheduled. For legacy reasons, when
    # `catchup=True`, we use `get_previous_scheduled_dagrun` unless
    # `ignore_schedule` is `True`.
    ignore_schedule = state is not None or not dag.timetable.can_be_scheduled
    if dag.catchup is True and not ignore_schedule:
        last_dagrun = DagRun.get_previous_scheduled_dagrun(dr.id, session=session)
    else:
        last_dagrun = DagRun.get_previous_dagrun(dag_run=dr, session=session, state=state)

    if last_dagrun:
        return last_dagrun

    return None


def _get_previous_execution_date(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    state: DagRunState | None,
    session: Session,
) -> pendulum.DateTime | None:
    """
    Get execution date from property previous_ti_success.

    :param task_instance: the task instance
    :param session: SQLAlchemy ORM Session
    :param state: If passed, it only take into account instances of a specific state.

    :meta private:
    """
    log.debug("previous_execution_date was called")
    prev_ti = task_instance.get_previous_ti(state=state, session=session)
    return pendulum.instance(prev_ti.execution_date) if prev_ti and prev_ti.execution_date else None


def _email_alert(
    *, task_instance: TaskInstance | TaskInstancePydantic, exception, task: BaseOperator
) -> None:
    """
    Send alert email with exception information.

    :param task_instance: the task instance
    :param exception: the exception
    :param task: task related to the exception

    :meta private:
    """
    subject, html_content, html_content_err = task_instance.get_email_subject_content(exception, task=task)
    if TYPE_CHECKING:
        assert task.email
    try:
        send_email(task.email, subject, html_content)
    except Exception:
        send_email(task.email, subject, html_content_err)


def _get_email_subject_content(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    exception: BaseException,
    task: BaseOperator | None = None,
) -> tuple[str, str, str]:
    """
    Get the email subject content for exceptions.

    :param task_instance: the task instance
    :param exception: the exception sent in the email
    :param task:

    :meta private:
    """
    # For a ti from DB (without ti.task), return the default value
    if task is None:
        task = getattr(task_instance, "task")
    use_default = task is None
    exception_html = str(exception).replace("\n", "<br>")

    default_subject = "Airflow alert: {{ti}}"
    # For reporting purposes, we report based on 1-indexed,
    # not 0-indexed lists (i.e. Try 1 instead of
    # Try 0 for the first attempt).
    default_html_content = (
        "Try {{try_number}} out of {{max_tries + 1}}<br>"
        "Exception:<br>{{exception_html}}<br>"
        'Log: <a href="{{ti.log_url}}">Link</a><br>'
        "Host: {{ti.hostname}}<br>"
        'Mark success: <a href="{{ti.mark_success_url}}">Link</a><br>'
    )

    default_html_content_err = (
        "Try {{try_number}} out of {{max_tries + 1}}<br>"
        "Exception:<br>Failed attempt to attach error logs<br>"
        'Log: <a href="{{ti.log_url}}">Link</a><br>'
        "Host: {{ti.hostname}}<br>"
        'Mark success: <a href="{{ti.mark_success_url}}">Link</a><br>'
    )

    # This function is called after changing the state from RUNNING,
    # so we need to subtract 1 from self.try_number here.
    current_try_number = task_instance.try_number - 1
    additional_context: dict[str, Any] = {
        "exception": exception,
        "exception_html": exception_html,
        "try_number": current_try_number,
        "max_tries": task_instance.max_tries,
    }

    if use_default:
        default_context = {"ti": task_instance, **additional_context}
        jinja_env = jinja2.Environment(
            loader=jinja2.FileSystemLoader(os.path.dirname(__file__)), autoescape=True
        )
        subject = jinja_env.from_string(default_subject).render(**default_context)
        html_content = jinja_env.from_string(default_html_content).render(**default_context)
        html_content_err = jinja_env.from_string(default_html_content_err).render(**default_context)

    else:
        if TYPE_CHECKING:
            assert task_instance.task

        # Use the DAG's get_template_env() to set force_sandboxed. Don't add
        # the flag to the function on task object -- that function can be
        # overridden, and adding a flag breaks backward compatibility.
        dag = task_instance.task.get_dag()
        if dag:
            jinja_env = dag.get_template_env(force_sandboxed=True)
        else:
            jinja_env = SandboxedEnvironment(cache_size=0)
        jinja_context = task_instance.get_template_context()
        context_merge(jinja_context, additional_context)

        def render(key: str, content: str) -> str:
            if conf.has_option("email", key):
                path = conf.get_mandatory_value("email", key)
                try:
                    with open(path) as f:
                        content = f.read()
                except FileNotFoundError:
                    log.warning("Could not find email template file '%s'. Using defaults...", path)
                except OSError:
                    log.exception("Error while using email template %s. Using defaults...", path)
            return render_template_to_string(jinja_env.from_string(content), jinja_context)

        subject = render("subject_template", default_subject)
        html_content = render("html_content_template", default_html_content)
        html_content_err = render("html_content_template", default_html_content_err)

    return subject, html_content, html_content_err


def _run_finished_callback(
    *,
    callbacks: None | TaskStateChangeCallback | list[TaskStateChangeCallback],
    context: Context,
) -> None:
    """
    Run callback after task finishes.

    :param callbacks: callbacks to run
    :param context: callbacks context

    :meta private:
    """
    if callbacks:
        callbacks = callbacks if isinstance(callbacks, list) else [callbacks]
        for callback in callbacks:
            try:
                callback(context)
            except Exception:
                callback_name = qualname(callback).split(".")[-1]
                log.exception("Error when executing %s callback", callback_name)  # type: ignore[attr-defined]


def _log_state(*, task_instance: TaskInstance | TaskInstancePydantic, lead_msg: str = "") -> None:
    """
    Log task state.

    :param task_instance: the task instance
    :param lead_msg: lead message

    :meta private:
    """
    params = [
        lead_msg,
        str(task_instance.state).upper(),
        task_instance.dag_id,
        task_instance.task_id,
        task_instance.run_id,
    ]
    message = "%sMarking task as %s. dag_id=%s, task_id=%s, run_id=%s, "
    if task_instance.map_index >= 0:
        params.append(task_instance.map_index)
        message += "map_index=%d, "
    message += "execution_date=%s, start_date=%s, end_date=%s"
    log.info(
        message,
        *params,
        _date_or_empty(task_instance=task_instance, attr="execution_date"),
        _date_or_empty(task_instance=task_instance, attr="start_date"),
        _date_or_empty(task_instance=task_instance, attr="end_date"),
    )


def _date_or_empty(*, task_instance: TaskInstance | TaskInstancePydantic, attr: str) -> str:
    """
    Fetch a date attribute or None of it does not exist.

    :param task_instance: the task instance
    :param attr: the attribute name

    :meta private:
    """
    result: datetime | None = getattr(task_instance, attr, None)
    return result.strftime("%Y%m%dT%H%M%S") if result else ""


def _get_previous_ti(
    *,
    task_instance: TaskInstance | TaskInstancePydantic,
    session: Session,
    state: DagRunState | None = None,
) -> TaskInstance | TaskInstancePydantic | None:
    """
    Get task instance for the task that ran before this task instance.

    :param task_instance: the task instance
    :param state: If passed, it only take into account instances of a specific state.
    :param session: SQLAlchemy ORM Session

    :meta private:
    """
    dagrun = task_instance.get_previous_dagrun(state, session=session)
    if dagrun is None:
        return None
    return dagrun.get_task_instance(task_instance.task_id, session=session)


class TaskInstance(Base, LoggingMixin):
    """
    Task instances store the state of a task instance.

    This table is the authority and single source of truth around what tasks
    have run and the state they are in.

    The SqlAlchemy model doesn't have a SqlAlchemy foreign key to the task or
    dag model deliberately to have more control over transactions.

    Database transactions on this table should insure double triggers and
    any confusion around what task instances are or aren't ready to run
    even while multiple schedulers may be firing task instances.

    A value of -1 in map_index represents any of: a TI without mapped tasks;
    a TI with mapped tasks that has yet to be expanded (state=pending);
    a TI with mapped tasks that expanded to an empty list (state=skipped).
    """

    __tablename__ = "task_instance"
    task_id = Column(StringID(), primary_key=True, nullable=False)
    dag_id = Column(StringID(), primary_key=True, nullable=False)
    run_id = Column(StringID(), primary_key=True, nullable=False)
    map_index = Column(Integer, primary_key=True, nullable=False, server_default=text("-1"))

    start_date = Column(UtcDateTime)
    end_date = Column(UtcDateTime)
    duration = Column(Float)
    state = Column(String(20))
    _try_number = Column("try_number", Integer, default=0)
    max_tries = Column(Integer, server_default=text("-1"))
    hostname = Column(String(1000))
    unixname = Column(String(1000))
    job_id = Column(Integer)
    pool = Column(String(256), nullable=False)
    pool_slots = Column(Integer, default=1, nullable=False)
    queue = Column(String(256))
    priority_weight = Column(Integer)
    operator = Column(String(1000))
    custom_operator_name = Column(String(1000))
    queued_dttm = Column(UtcDateTime)
    queued_by_job_id = Column(Integer)
    pid = Column(Integer)
    executor_config = Column(ExecutorConfigType(pickler=dill))
    updated_at = Column(UtcDateTime, default=timezone.utcnow, onupdate=timezone.utcnow)
    rendered_map_index = Column(String(250))

    external_executor_id = Column(StringID())

    # The trigger to resume on if we are in state DEFERRED
    trigger_id = Column(Integer)

    # Optional timeout datetime for the trigger (past this, we'll fail)
    trigger_timeout = Column(DateTime)
    # The trigger_timeout should be TIMESTAMP(using UtcDateTime) but for ease of
    # migration, we are keeping it as DateTime pending a change where expensive
    # migration is inevitable.

    # The method to call next, and any extra arguments to pass to it.
    # Usually used when resuming from DEFERRED.
    next_method = Column(String(1000))
    next_kwargs = Column(MutableDict.as_mutable(ExtendedJSON))

    _task_display_property_value = Column("task_display_name", String(2000), nullable=True)
    # If adding new fields here then remember to add them to
    # refresh_from_db() or they won't display in the UI correctly

    __table_args__ = (
        Index("ti_dag_state", dag_id, state),
        Index("ti_dag_run", dag_id, run_id),
        Index("ti_state", state),
        Index("ti_state_lkp", dag_id, task_id, run_id, state),
        # The below index has been added to improve performance on postgres setups with tens of millions of
        # taskinstance rows. Aim is to improve the below query (it can be used to find the last successful
        # execution date of a task instance):
        #    SELECT start_date FROM task_instance WHERE dag_id = 'xx' AND task_id = 'yy' AND state = 'success'
        #    ORDER BY start_date DESC NULLS LAST LIMIT 1;
        # Existing "ti_state_lkp" is not enough for such query when this table has millions of rows, since
        # rows have to be fetched in order to retrieve the start_date column. With this index, INDEX ONLY SCAN
        # is performed and that query runs within milliseconds.
        Index("ti_pool", pool, state, priority_weight),
        Index("ti_job_id", job_id),
        Index("ti_trigger_id", trigger_id),
        PrimaryKeyConstraint("dag_id", "task_id", "run_id", "map_index", name="task_instance_pkey"),
        ForeignKeyConstraint(
            [trigger_id],
            ["trigger.id"],
            name="task_instance_trigger_id_fkey",
            ondelete="CASCADE",
        ),
        ForeignKeyConstraint(
            [dag_id, run_id],
            ["dag_run.dag_id", "dag_run.run_id"],
            name="task_instance_dag_run_fkey",
            ondelete="CASCADE",
        ),
    )

    dag_model: DagModel = relationship(
        "DagModel",
        primaryjoin="TaskInstance.dag_id == DagModel.dag_id",
        foreign_keys=dag_id,
        uselist=False,
        innerjoin=True,
        viewonly=True,
    )

    trigger = relationship("Trigger", uselist=False, back_populates="task_instance")
    triggerer_job = association_proxy("trigger", "triggerer_job")
    dag_run = relationship("DagRun", back_populates="task_instances", lazy="joined", innerjoin=True)
    rendered_task_instance_fields = relationship("RenderedTaskInstanceFields", lazy="noload", uselist=False)
    execution_date = association_proxy("dag_run", "execution_date")
    task_instance_note = relationship(
        "TaskInstanceNote",
        back_populates="task_instance",
        uselist=False,
        cascade="all, delete, delete-orphan",
    )
    note = association_proxy("task_instance_note", "content", creator=_creator_note)
    task: Operator | None = None
    test_mode: bool = False
    is_trigger_log_context: bool = False
    run_as_user: str | None = None
    raw: bool | None = None
    """Indicate to FileTaskHandler that logging context should be set up for trigger logging.

    :meta private:
    """
    _logger_name = "airflow.task"

    def __init__(
        self,
        task: Operator,
        execution_date: datetime | None = None,
        run_id: str | None = None,
        state: str | None = None,
        map_index: int = -1,
    ):
        super().__init__()
        self.dag_id = task.dag_id
        self.task_id = task.task_id
        self.map_index = map_index
        self.refresh_from_task(task)
        if TYPE_CHECKING:
            assert self.task

        # init_on_load will config the log
        self.init_on_load()

        if run_id is None and execution_date is not None:
            from airflow.models.dagrun import DagRun  # Avoid circular import

            warnings.warn(
                "Passing an execution_date to `TaskInstance()` is deprecated in favour of passing a run_id",
                RemovedInAirflow3Warning,
                # Stack level is 4 because SQLA adds some wrappers around the constructor
                stacklevel=4,
            )
            # make sure we have a localized execution_date stored in UTC
            if execution_date and not timezone.is_localized(execution_date):
                self.log.warning(
                    "execution date %s has no timezone information. Using default from dag or system",
                    execution_date,
                )
                if self.task.has_dag():
                    if TYPE_CHECKING:
                        assert self.task.dag
                    execution_date = timezone.make_aware(execution_date, self.task.dag.timezone)
                else:
                    execution_date = timezone.make_aware(execution_date)

                execution_date = timezone.convert_to_utc(execution_date)
            with create_session() as session:
                run_id = (
                    session.query(DagRun.run_id)
                    .filter_by(dag_id=self.dag_id, execution_date=execution_date)
                    .scalar()
                )
                if run_id is None:
                    raise DagRunNotFound(
                        f"DagRun for {self.dag_id!r} with date {execution_date} not found"
                    ) from None

        self.run_id = run_id

        self.try_number = 0
        self.max_tries = self.task.retries
        self.unixname = getuser()
        if state:
            self.state = state
        self.hostname = ""
        # Is this TaskInstance being currently running within `airflow tasks run --raw`.
        # Not persisted to the database so only valid for the current process
        self.raw = False
        # can be changed when calling 'run'
        self.test_mode = False

    def __hash__(self):
        return hash((self.task_id, self.dag_id, self.run_id, self.map_index))

    @property
    def stats_tags(self) -> dict[str, str]:
        """Returns task instance tags."""
        return _stats_tags(task_instance=self)

    @staticmethod
    def insert_mapping(run_id: str, task: Operator, map_index: int) -> dict[str, Any]:
        """Insert mapping.

        :meta private:
        """
        priority_weight = task.weight_rule.get_weight(
            TaskInstance(task=task, run_id=run_id, map_index=map_index)
        )

        return {
            "dag_id": task.dag_id,
            "task_id": task.task_id,
            "run_id": run_id,
            "_try_number": 0,
            "hostname": "",
            "unixname": getuser(),
            "queue": task.queue,
            "pool": task.pool,
            "pool_slots": task.pool_slots,
            "priority_weight": priority_weight,
            "run_as_user": task.run_as_user,
            "max_tries": task.retries,
            "executor_config": task.executor_config,
            "operator": task.task_type,
            "custom_operator_name": getattr(task, "custom_operator_name", None),
            "map_index": map_index,
            "_task_display_property_value": task.task_display_name,
        }

    @reconstructor
    def init_on_load(self) -> None:
        """Initialize the attributes that aren't stored in the DB."""
        self.test_mode = False  # can be changed when calling 'run'

    @hybrid_property
    def try_number(self):
        """
        Return the try number that a task number will be when it is actually run.

        If the TaskInstance is currently running, this will match the column in the
        database, in all other cases this will be incremented.

        This is designed so that task logs end up in the right file.
        """
        return _get_try_number(task_instance=self)

    @try_number.expression
    def try_number(cls):
        """
        Return the expression to be used by SQLAlchemy when filtering on try_number.

        This is required because the override in the get_try_number function causes
        try_number values to be off by one when listing tasks in the UI.

        :meta private:
        """
        return cls._try_number

    @try_number.setter
    def try_number(self, value: int) -> None:
        """
        Set a task try number.

        :param value: the try number
        """
        _set_try_number(task_instance=self, value=value)

    @property
    def prev_attempted_tries(self) -> int:
        """
        Calculate the number of previously attempted tries, defaulting to 0.

        Expose this for the Task Tries and Gantt graph views.
        Using `try_number` throws off the counts for non-running tasks.
        Also useful in error logging contexts to get the try number for the last try that was attempted.
        """
        return self._try_number

    @property
    def next_try_number(self) -> int:
        return self._try_number + 1

    @property
    def operator_name(self) -> str | None:
        """@property: use a more friendly display name for the operator, if set."""
        return self.custom_operator_name or self.operator

    @hybrid_property
    def task_display_name(self) -> str:
        return self._task_display_property_value or self.task_id

    @staticmethod
    def _command_as_list(
        ti: TaskInstance | TaskInstancePydantic,
        mark_success: bool = False,
        ignore_all_deps: bool = False,
        ignore_task_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_ti_state: bool = False,
        local: bool = False,
        pickle_id: int | None = None,
        raw: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        cfg_path: str | None = None,
    ) -> list[str]:
        dag: DAG | DagModel | DagModelPydantic | None
        # Use the dag if we have it, else fallback to the ORM dag_model, which might not be loaded
        if hasattr(ti, "task") and getattr(ti.task, "dag", None) is not None:
            if TYPE_CHECKING:
                assert ti.task
            dag = ti.task.dag
        else:
            dag = ti.dag_model

        if dag is None:
            raise ValueError("DagModel is empty")

        should_pass_filepath = not pickle_id and dag
        path: PurePath | None = None
        if should_pass_filepath:
            if dag.is_subdag:
                if TYPE_CHECKING:
                    assert dag.parent_dag is not None
                path = dag.parent_dag.relative_fileloc
            else:
                path = dag.relative_fileloc

            if path:
                if not path.is_absolute():
                    path = "DAGS_FOLDER" / path

        return TaskInstance.generate_command(
            ti.dag_id,
            ti.task_id,
            run_id=ti.run_id,
            mark_success=mark_success,
            ignore_all_deps=ignore_all_deps,
            ignore_task_deps=ignore_task_deps,
            ignore_depends_on_past=ignore_depends_on_past,
            wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
            ignore_ti_state=ignore_ti_state,
            local=local,
            pickle_id=pickle_id,
            file_path=path,
            raw=raw,
            job_id=job_id,
            pool=pool,
            cfg_path=cfg_path,
            map_index=ti.map_index,
        )

    def command_as_list(
        self,
        mark_success: bool = False,
        ignore_all_deps: bool = False,
        ignore_task_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_ti_state: bool = False,
        local: bool = False,
        pickle_id: int | None = None,
        raw: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        cfg_path: str | None = None,
    ) -> list[str]:
        """
        Return a command that can be executed anywhere where airflow is installed.

        This command is part of the message sent to executors by the orchestrator.
        """
        return TaskInstance._command_as_list(
            ti=self,
            mark_success=mark_success,
            ignore_all_deps=ignore_all_deps,
            ignore_task_deps=ignore_task_deps,
            ignore_depends_on_past=ignore_depends_on_past,
            wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
            ignore_ti_state=ignore_ti_state,
            local=local,
            pickle_id=pickle_id,
            raw=raw,
            job_id=job_id,
            pool=pool,
            cfg_path=cfg_path,
        )

    @staticmethod
    def generate_command(
        dag_id: str,
        task_id: str,
        run_id: str,
        mark_success: bool = False,
        ignore_all_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_task_deps: bool = False,
        ignore_ti_state: bool = False,
        local: bool = False,
        pickle_id: int | None = None,
        file_path: PurePath | str | None = None,
        raw: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        cfg_path: str | None = None,
        map_index: int = -1,
    ) -> list[str]:
        """
        Generate the shell command required to execute this task instance.

        :param dag_id: DAG ID
        :param task_id: Task ID
        :param run_id: The run_id of this task's DagRun
        :param mark_success: Whether to mark the task as successful
        :param ignore_all_deps: Ignore all ignorable dependencies.
            Overrides the other ignore_* parameters.
        :param ignore_depends_on_past: Ignore depends_on_past parameter of DAGs
            (e.g. for Backfills)
        :param wait_for_past_depends_before_skipping: Wait for past depends before marking the ti as skipped
        :param ignore_task_deps: Ignore task-specific dependencies such as depends_on_past
            and trigger rule
        :param ignore_ti_state: Ignore the task instance's previous failure/success
        :param local: Whether to run the task locally
        :param pickle_id: If the DAG was serialized to the DB, the ID
            associated with the pickled DAG
        :param file_path: path to the file containing the DAG definition
        :param raw: raw mode (needs more details)
        :param job_id: job ID (needs more details)
        :param pool: the Airflow pool that the task should run in
        :param cfg_path: the Path to the configuration file
        :return: shell command that can be used to run the task instance
        """
        cmd = ["airflow", "tasks", "run", dag_id, task_id, run_id]
        if mark_success:
            cmd.extend(["--mark-success"])
        if pickle_id:
            cmd.extend(["--pickle", str(pickle_id)])
        if job_id:
            cmd.extend(["--job-id", str(job_id)])
        if ignore_all_deps:
            cmd.extend(["--ignore-all-dependencies"])
        if ignore_task_deps:
            cmd.extend(["--ignore-dependencies"])
        if ignore_depends_on_past:
            cmd.extend(["--depends-on-past", "ignore"])
        elif wait_for_past_depends_before_skipping:
            cmd.extend(["--depends-on-past", "wait"])
        if ignore_ti_state:
            cmd.extend(["--force"])
        if local:
            cmd.extend(["--local"])
        if pool:
            cmd.extend(["--pool", pool])
        if raw:
            cmd.extend(["--raw"])
        if file_path:
            cmd.extend(["--subdir", os.fspath(file_path)])
        if cfg_path:
            cmd.extend(["--cfg-path", cfg_path])
        if map_index != -1:
            cmd.extend(["--map-index", str(map_index)])
        return cmd

    @property
    def log_url(self) -> str:
        """Log URL for TaskInstance."""
        run_id = quote(self.run_id)
        base_url = conf.get_mandatory_value("webserver", "BASE_URL")
        return (
            f"{base_url}"
            f"/dags"
            f"/{self.dag_id}"
            f"/grid"
            f"?dag_run_id={run_id}"
            f"&task_id={self.task_id}"
            f"&map_index={self.map_index}"
            "&tab=logs"
        )

    @property
    def mark_success_url(self) -> str:
        """URL to mark TI success."""
        base_url = conf.get_mandatory_value("webserver", "BASE_URL")
        return (
            f"{base_url}"
            "/confirm"
            f"?task_id={self.task_id}"
            f"&dag_id={self.dag_id}"
            f"&dag_run_id={quote(self.run_id)}"
            "&upstream=false"
            "&downstream=false"
            "&state=success"
        )

    @provide_session
    def current_state(self, session: Session = NEW_SESSION) -> str:
        """
        Get the very latest state from the database.

        If a session is passed, we use and looking up the state becomes part of the session,
        otherwise a new session is used.

        sqlalchemy.inspect is used here to get the primary keys ensuring that if they change
        it will not regress

        :param session: SQLAlchemy ORM Session
        """
        filters = (col == getattr(self, col.name) for col in inspect(TaskInstance).primary_key)
        return session.query(TaskInstance.state).filter(*filters).scalar()

    @provide_session
    def error(self, session: Session = NEW_SESSION) -> None:
        """
        Force the task instance's state to FAILED in the database.

        :param session: SQLAlchemy ORM Session
        """
        self.log.error("Recording the task instance as FAILED")
        self.state = TaskInstanceState.FAILED
        session.merge(self)
        session.commit()

    @classmethod
    @internal_api_call
    @provide_session
    def get_task_instance(
        cls,
        dag_id: str,
        run_id: str,
        task_id: str,
        map_index: int,
        select_columns: bool = False,
        lock_for_update: bool = False,
        session: Session = NEW_SESSION,
    ) -> TaskInstance | TaskInstancePydantic | None:
        query = (
            session.query(*TaskInstance.__table__.columns) if select_columns else session.query(TaskInstance)
        )
        query = query.filter_by(
            dag_id=dag_id,
            run_id=run_id,
            task_id=task_id,
            map_index=map_index,
        )

        if lock_for_update:
            for attempt in run_with_db_retries(logger=cls.logger()):
                with attempt:
                    return query.with_for_update().one_or_none()
        else:
            return query.one_or_none()

        return None

    @provide_session
    def refresh_from_db(self, session: Session = NEW_SESSION, lock_for_update: bool = False) -> None:
        """
        Refresh the task instance from the database based on the primary key.

        :param session: SQLAlchemy ORM Session
        :param lock_for_update: if True, indicates that the database should
            lock the TaskInstance (issuing a FOR UPDATE clause) until the
            session is committed.
        """
        _refresh_from_db(task_instance=self, session=session, lock_for_update=lock_for_update)

    def refresh_from_task(self, task: Operator, pool_override: str | None = None) -> None:
        """
        Copy common attributes from the given task.

        :param task: The task object to copy from
        :param pool_override: Use the pool_override instead of task's pool
        """
        _refresh_from_task(task_instance=self, task=task, pool_override=pool_override)

    @staticmethod
    @internal_api_call
    @provide_session
    def _clear_xcom_data(ti: TaskInstance | TaskInstancePydantic, session: Session = NEW_SESSION) -> None:
        """Clear all XCom data from the database for the task instance.

        If the task is unmapped, all XComs matching this task ID in the same DAG
        run are removed. If the task is mapped, only the one with matching map
        index is removed.

        :param ti: The TI for which we need to clear xcoms.
        :param session: SQLAlchemy ORM Session
        """
        ti.log.debug("Clearing XCom data")
        if ti.map_index < 0:
            map_index: int | None = None
        else:
            map_index = ti.map_index
        XCom.clear(
            dag_id=ti.dag_id,
            task_id=ti.task_id,
            run_id=ti.run_id,
            map_index=map_index,
            session=session,
        )

    @provide_session
    def clear_xcom_data(self, session: Session = NEW_SESSION):
        self._clear_xcom_data(ti=self, session=session)

    @property
    def key(self) -> TaskInstanceKey:
        """Returns a tuple that identifies the task instance uniquely."""
        return TaskInstanceKey(self.dag_id, self.task_id, self.run_id, self.try_number, self.map_index)

    @staticmethod
    @internal_api_call
    def _set_state(ti: TaskInstance | TaskInstancePydantic, state, session: Session) -> bool:
        if not isinstance(ti, TaskInstance):
            ti = session.scalars(
                select(TaskInstance).where(
                    TaskInstance.task_id == ti.task_id,
                    TaskInstance.dag_id == ti.dag_id,
                    TaskInstance.run_id == ti.run_id,
                    TaskInstance.map_index == ti.map_index,
                )
            ).one()

        if ti.state == state:
            return False

        current_time = timezone.utcnow()
        ti.log.debug("Setting task state for %s to %s", ti, state)
        ti.state = state
        ti.start_date = ti.start_date or current_time
        if ti.state in State.finished or ti.state == TaskInstanceState.UP_FOR_RETRY:
            ti.end_date = ti.end_date or current_time
            ti.duration = (ti.end_date - ti.start_date).total_seconds()
        session.merge(ti)
        return True

    @provide_session
    def set_state(self, state: str | None, session: Session = NEW_SESSION) -> bool:
        """
        Set TaskInstance state.

        :param state: State to set for the TI
        :param session: SQLAlchemy ORM Session
        :return: Was the state changed
        """
        return self._set_state(ti=self, state=state, session=session)

    @property
    def is_premature(self) -> bool:
        """Returns whether a task is in UP_FOR_RETRY state and its retry interval has elapsed."""
        # is the task still in the retry waiting period?
        return self.state == TaskInstanceState.UP_FOR_RETRY and not self.ready_for_retry()

    @provide_session
    def are_dependents_done(self, session: Session = NEW_SESSION) -> bool:
        """
        Check whether the immediate dependents of this task instance have succeeded or have been skipped.

        This is meant to be used by wait_for_downstream.

        This is useful when you do not want to start processing the next
        schedule of a task until the dependents are done. For instance,
        if the task DROPs and recreates a table.

        :param session: SQLAlchemy ORM Session
        """
        task = self.task
        if TYPE_CHECKING:
            assert task

        if not task.downstream_task_ids:
            return True

        ti = session.query(func.count(TaskInstance.task_id)).filter(
            TaskInstance.dag_id == self.dag_id,
            TaskInstance.task_id.in_(task.downstream_task_ids),
            TaskInstance.run_id == self.run_id,
            TaskInstance.state.in_((TaskInstanceState.SKIPPED, TaskInstanceState.SUCCESS)),
        )
        count = ti[0][0]
        return count == len(task.downstream_task_ids)

    @provide_session
    def get_previous_dagrun(
        self,
        state: DagRunState | None = None,
        session: Session | None = None,
    ) -> DagRun | None:
        """
        Return the DagRun that ran before this task instance's DagRun.

        :param state: If passed, it only take into account instances of a specific state.
        :param session: SQLAlchemy ORM Session.
        """
        return _get_previous_dagrun(task_instance=self, state=state, session=session)

    @provide_session
    def get_previous_ti(
        self,
        state: DagRunState | None = None,
        session: Session = NEW_SESSION,
    ) -> TaskInstance | TaskInstancePydantic | None:
        """
        Return the task instance for the task that ran before this task instance.

        :param session: SQLAlchemy ORM Session
        :param state: If passed, it only take into account instances of a specific state.
        """
        return _get_previous_ti(task_instance=self, state=state, session=session)

    @property
    def previous_ti(self) -> TaskInstance | TaskInstancePydantic | None:
        """
        This attribute is deprecated.

        Please use :class:`airflow.models.taskinstance.TaskInstance.get_previous_ti`.
        """
        warnings.warn(
            """
            This attribute is deprecated.
            Please use `airflow.models.taskinstance.TaskInstance.get_previous_ti` method.
            """,
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        return self.get_previous_ti()

    @property
    def previous_ti_success(self) -> TaskInstance | TaskInstancePydantic | None:
        """
        This attribute is deprecated.

        Please use :class:`airflow.models.taskinstance.TaskInstance.get_previous_ti`.
        """
        warnings.warn(
            """
            This attribute is deprecated.
            Please use `airflow.models.taskinstance.TaskInstance.get_previous_ti` method.
            """,
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        return self.get_previous_ti(state=DagRunState.SUCCESS)

    @provide_session
    def get_previous_execution_date(
        self,
        state: DagRunState | None = None,
        session: Session = NEW_SESSION,
    ) -> pendulum.DateTime | None:
        """
        Return the execution date from property previous_ti_success.

        :param state: If passed, it only take into account instances of a specific state.
        :param session: SQLAlchemy ORM Session
        """
        return _get_previous_execution_date(task_instance=self, state=state, session=session)

    @provide_session
    def get_previous_start_date(
        self, state: DagRunState | None = None, session: Session = NEW_SESSION
    ) -> pendulum.DateTime | None:
        """
        Return the start date from property previous_ti_success.

        :param state: If passed, it only take into account instances of a specific state.
        :param session: SQLAlchemy ORM Session
        """
        self.log.debug("previous_start_date was called")
        prev_ti = self.get_previous_ti(state=state, session=session)
        # prev_ti may not exist and prev_ti.start_date may be None.
        return pendulum.instance(prev_ti.start_date) if prev_ti and prev_ti.start_date else None

    @property
    def previous_start_date_success(self) -> pendulum.DateTime | None:
        """
        This attribute is deprecated.

        Please use :class:`airflow.models.taskinstance.TaskInstance.get_previous_start_date`.
        """
        warnings.warn(
            """
            This attribute is deprecated.
            Please use `airflow.models.taskinstance.TaskInstance.get_previous_start_date` method.
            """,
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        return self.get_previous_start_date(state=DagRunState.SUCCESS)

    @provide_session
    def are_dependencies_met(
        self, dep_context: DepContext | None = None, session: Session = NEW_SESSION, verbose: bool = False
    ) -> bool:
        """
        Are all conditions met for this task instance to be run given the context for the dependencies.

        (e.g. a task instance being force run from the UI will ignore some dependencies).

        :param dep_context: The execution context that determines the dependencies that should be evaluated.
        :param session: database session
        :param verbose: whether log details on failed dependencies on info or debug log level
        """
        dep_context = dep_context or DepContext()
        failed = False
        verbose_aware_logger = self.log.info if verbose else self.log.debug
        for dep_status in self.get_failed_dep_statuses(dep_context=dep_context, session=session):
            failed = True

            verbose_aware_logger(
                "Dependencies not met for %s, dependency '%s' FAILED: %s",
                self,
                dep_status.dep_name,
                dep_status.reason,
            )

        if failed:
            return False

        verbose_aware_logger("Dependencies all met for dep_context=%s ti=%s", dep_context.description, self)
        return True

    @provide_session
    def get_failed_dep_statuses(self, dep_context: DepContext | None = None, session: Session = NEW_SESSION):
        """Get failed Dependencies."""
        if TYPE_CHECKING:
            assert self.task

        dep_context = dep_context or DepContext()
        for dep in dep_context.deps | self.task.deps:
            for dep_status in dep.get_dep_statuses(self, session, dep_context):
                self.log.debug(
                    "%s dependency '%s' PASSED: %s, %s",
                    self,
                    dep_status.dep_name,
                    dep_status.passed,
                    dep_status.reason,
                )

                if not dep_status.passed:
                    yield dep_status

    def __repr__(self) -> str:
        prefix = f"<TaskInstance: {self.dag_id}.{self.task_id} {self.run_id} "
        if self.map_index != -1:
            prefix += f"map_index={self.map_index} "
        return prefix + f"[{self.state}]>"

    def next_retry_datetime(self):
        """
        Get datetime of the next retry if the task instance fails.

        For exponential backoff, retry_delay is used as base and will be converted to seconds.
        """
        from airflow.models.abstractoperator import MAX_RETRY_DELAY

        delay = self.task.retry_delay
        if self.task.retry_exponential_backoff:
            # If the min_backoff calculation is below 1, it will be converted to 0 via int. Thus,
            # we must round up prior to converting to an int, otherwise a divide by zero error
            # will occur in the modded_hash calculation.
            min_backoff = math.ceil(delay.total_seconds() * (2 ** (self.try_number - 2)))

            # In the case when delay.total_seconds() is 0, min_backoff will not be rounded up to 1.
            # To address this, we impose a lower bound of 1 on min_backoff. This effectively makes
            # the ceiling function unnecessary, but the ceiling function was retained to avoid
            # introducing a breaking change.
            if min_backoff < 1:
                min_backoff = 1

            # deterministic per task instance
            ti_hash = int(
                hashlib.sha1(
                    f"{self.dag_id}#{self.task_id}#{self.execution_date}#{self.try_number}".encode()
                ).hexdigest(),
                16,
            )
            # between 1 and 1.0 * delay * (2^retry_number)
            modded_hash = min_backoff + ti_hash % min_backoff
            # timedelta has a maximum representable value. The exponentiation
            # here means this value can be exceeded after a certain number
            # of tries (around 50 if the initial delay is 1s, even fewer if
            # the delay is larger). Cap the value here before creating a
            # timedelta object so the operation doesn't fail with "OverflowError".
            delay_backoff_in_seconds = min(modded_hash, MAX_RETRY_DELAY)
            delay = timedelta(seconds=delay_backoff_in_seconds)
            if self.task.max_retry_delay:
                delay = min(self.task.max_retry_delay, delay)
        return self.end_date + delay

    def ready_for_retry(self) -> bool:
        """Check on whether the task instance is in the right state and timeframe to be retried."""
        return self.state == TaskInstanceState.UP_FOR_RETRY and self.next_retry_datetime() < timezone.utcnow()

    @staticmethod
    @internal_api_call
    def _get_dagrun(dag_id, run_id, session) -> DagRun:
        from airflow.models.dagrun import DagRun  # Avoid circular import

        dr = session.query(DagRun).filter(DagRun.dag_id == dag_id, DagRun.run_id == run_id).one()
        return dr

    @provide_session
    def get_dagrun(self, session: Session = NEW_SESSION) -> DagRun:
        """
        Return the DagRun for this TaskInstance.

        :param session: SQLAlchemy ORM Session
        :return: DagRun
        """
        info = inspect(self)
        if info.attrs.dag_run.loaded_value is not NO_VALUE:
            if getattr(self, "task", None) is not None:
                if TYPE_CHECKING:
                    assert self.task
                self.dag_run.dag = self.task.dag
            return self.dag_run

        dr = self._get_dagrun(self.dag_id, self.run_id, session)
        if getattr(self, "task", None) is not None:
            if TYPE_CHECKING:
                assert self.task
            dr.dag = self.task.dag
        # Record it in the instance for next time. This means that `self.execution_date` will work correctly
        set_committed_value(self, "dag_run", dr)

        return dr

    @classmethod
    @internal_api_call
    @provide_session
    def _check_and_change_state_before_execution(
        cls,
        task_instance: TaskInstance | TaskInstancePydantic,
        verbose: bool = True,
        ignore_all_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_task_deps: bool = False,
        ignore_ti_state: bool = False,
        mark_success: bool = False,
        test_mode: bool = False,
        hostname: str = "",
        job_id: str | None = None,
        pool: str | None = None,
        external_executor_id: str | None = None,
        session: Session = NEW_SESSION,
    ) -> bool:
        """
        Check dependencies and then sets state to RUNNING if they are met.

        Returns True if and only if state is set to RUNNING, which implies that task should be
        executed, in preparation for _run_raw_task.

        :param verbose: whether to turn on more verbose logging
        :param ignore_all_deps: Ignore all of the non-critical dependencies, just runs
        :param ignore_depends_on_past: Ignore depends_on_past DAG attribute
        :param wait_for_past_depends_before_skipping: Wait for past depends before mark the ti as skipped
        :param ignore_task_deps: Don't check the dependencies of this TaskInstance's task
        :param ignore_ti_state: Disregards previous task instance state
        :param mark_success: Don't run the task, mark its state as success
        :param test_mode: Doesn't record success or failure in the DB
        :param hostname: The hostname of the worker running the task instance.
        :param job_id: Job (BackfillJob / LocalTaskJob / SchedulerJob) ID
        :param pool: specifies the pool to use to run the task instance
        :param external_executor_id: The identifier of the celery executor
        :param session: SQLAlchemy ORM Session
        :return: whether the state was changed to running or not
        """
        if TYPE_CHECKING:
            assert task_instance.task

        if isinstance(task_instance, TaskInstance):
            ti: TaskInstance = task_instance
        else:  # isinstance(task_instance,TaskInstancePydantic)
            filters = (col == getattr(task_instance, col.name) for col in inspect(TaskInstance).primary_key)
            ti = session.query(TaskInstance).filter(*filters).scalar()
        task = task_instance.task
        ti.refresh_from_task(task, pool_override=pool)
        ti.test_mode = test_mode
        ti.refresh_from_db(session=session, lock_for_update=True)
        ti.job_id = job_id
        ti.hostname = hostname
        ti.pid = None

        if not ignore_all_deps and not ignore_ti_state and ti.state == TaskInstanceState.SUCCESS:
            Stats.incr("previously_succeeded", tags=ti.stats_tags)

        if not mark_success:
            # Firstly find non-runnable and non-requeueable tis.
            # Since mark_success is not set, we do nothing.
            non_requeueable_dep_context = DepContext(
                deps=RUNNING_DEPS - REQUEUEABLE_DEPS,
                ignore_all_deps=ignore_all_deps,
                ignore_ti_state=ignore_ti_state,
                ignore_depends_on_past=ignore_depends_on_past,
                wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
                ignore_task_deps=ignore_task_deps,
                description="non-requeueable deps",
            )
            if not ti.are_dependencies_met(
                dep_context=non_requeueable_dep_context, session=session, verbose=True
            ):
                session.commit()
                return False

            # For reporting purposes, we report based on 1-indexed,
            # not 0-indexed lists (i.e. Attempt 1 instead of
            # Attempt 0 for the first attempt).
            # Set the task start date. In case it was re-scheduled use the initial
            # start date that is recorded in task_reschedule table
            # If the task continues after being deferred (next_method is set), use the original start_date
            ti.start_date = ti.start_date if ti.next_method else timezone.utcnow()
            if ti.state == TaskInstanceState.UP_FOR_RESCHEDULE:
                tr_start_date = session.scalar(
                    TR.stmt_for_task_instance(ti, descending=False).with_only_columns(TR.start_date).limit(1)
                )
                if tr_start_date:
                    ti.start_date = tr_start_date

            # Secondly we find non-runnable but requeueable tis. We reset its state.
            # This is because we might have hit concurrency limits,
            # e.g. because of backfilling.
            dep_context = DepContext(
                deps=REQUEUEABLE_DEPS,
                ignore_all_deps=ignore_all_deps,
                ignore_depends_on_past=ignore_depends_on_past,
                wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
                ignore_task_deps=ignore_task_deps,
                ignore_ti_state=ignore_ti_state,
                description="requeueable deps",
            )
            if not ti.are_dependencies_met(dep_context=dep_context, session=session, verbose=True):
                ti.state = None
                cls.logger().warning(
                    "Rescheduling due to concurrency limits reached "
                    "at task runtime. Attempt %s of "
                    "%s. State set to NONE.",
                    ti.try_number,
                    ti.max_tries + 1,
                )
                ti.queued_dttm = timezone.utcnow()
                session.merge(ti)
                session.commit()
                return False

        if ti.next_kwargs is not None:
            cls.logger().info("Resuming after deferral")
        else:
            cls.logger().info("Starting attempt %s of %s", ti.try_number, ti.max_tries + 1)
        ti._try_number += 1

        if not test_mode:
            session.add(Log(TaskInstanceState.RUNNING.value, ti))

        ti.state = TaskInstanceState.RUNNING
        ti.emit_state_change_metric(TaskInstanceState.RUNNING)

        if external_executor_id:
            ti.external_executor_id = external_executor_id

        ti.end_date = None
        if not test_mode:
            session.merge(ti).task = task
        session.commit()

        # Closing all pooled connections to prevent
        # "max number of connections reached"
        settings.engine.dispose()  # type: ignore
        if verbose:
            if mark_success:
                cls.logger().info("Marking success for %s on %s", ti.task, ti.execution_date)
            else:
                cls.logger().info("Executing %s on %s", ti.task, ti.execution_date)
        return True

    @provide_session
    def check_and_change_state_before_execution(
        self,
        verbose: bool = True,
        ignore_all_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_task_deps: bool = False,
        ignore_ti_state: bool = False,
        mark_success: bool = False,
        test_mode: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        external_executor_id: str | None = None,
        session: Session = NEW_SESSION,
    ) -> bool:
        return TaskInstance._check_and_change_state_before_execution(
            task_instance=self,
            verbose=verbose,
            ignore_all_deps=ignore_all_deps,
            ignore_depends_on_past=ignore_depends_on_past,
            wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
            ignore_task_deps=ignore_task_deps,
            ignore_ti_state=ignore_ti_state,
            mark_success=mark_success,
            test_mode=test_mode,
            hostname=get_hostname(),
            job_id=job_id,
            pool=pool,
            external_executor_id=external_executor_id,
            session=session,
        )

    def emit_state_change_metric(self, new_state: TaskInstanceState) -> None:
        """
        Send a time metric representing how much time a given state transition took.

        The previous state and metric name is deduced from the state the task was put in.

        :param new_state: The state that has just been set for this task.
            We do not use `self.state`, because sometimes the state is updated directly in the DB and not in
            the local TaskInstance object.
            Supported states: QUEUED and RUNNING
        """
        if self.end_date:
            # if the task has an end date, it means that this is not its first round.
            # we send the state transition time metric only on the first try, otherwise it gets more complex.
            return

        # switch on state and deduce which metric to send
        if new_state == TaskInstanceState.RUNNING:
            metric_name = "queued_duration"
            if self.queued_dttm is None:
                # this should not really happen except in tests or rare cases,
                # but we don't want to create errors just for a metric, so we just skip it
                self.log.warning(
                    "cannot record %s for task %s because previous state change time has not been saved",
                    metric_name,
                    self.task_id,
                )
                return
            timing = timezone.utcnow() - self.queued_dttm
        elif new_state == TaskInstanceState.QUEUED:
            metric_name = "scheduled_duration"
            if self.start_date is None:
                # This check does not work correctly before fields like `scheduled_dttm` are implemented.
                # TODO: Change the level to WARNING once it's viable.
                # see #30612 #34493 and #34771 for more details
                self.log.debug(
                    "cannot record %s for task %s because previous state change time has not been saved",
                    metric_name,
                    self.task_id,
                )
                return
            timing = timezone.utcnow() - self.start_date
        else:
            raise NotImplementedError("no metric emission setup for state %s", new_state)

        # send metric twice, once (legacy) with tags in the name and once with tags as tags
        Stats.timing(f"dag.{self.dag_id}.{self.task_id}.{metric_name}", timing)
        Stats.timing(f"task.{metric_name}", timing, tags={"task_id": self.task_id, "dag_id": self.dag_id})

    def clear_next_method_args(self) -> None:
        """Ensure we unset next_method and next_kwargs to ensure that any retries don't reuse them."""
        _clear_next_method_args(task_instance=self)

    @provide_session
    @Sentry.enrich_errors
    def _run_raw_task(
        self,
        mark_success: bool = False,
        test_mode: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        raise_on_defer: bool = False,
        session: Session = NEW_SESSION,
    ) -> TaskReturnCode | None:
        """
        Run a task, update the state upon completion, and run any appropriate callbacks.

        Immediately runs the task (without checking or changing db state
        before execution) and then sets the appropriate final state after
        completion and runs any post-execute callbacks. Meant to be called
        only after another function changes the state to running.

        :param mark_success: Don't run the task, mark its state as success
        :param test_mode: Doesn't record success or failure in the DB
        :param pool: specifies the pool to use to run the task instance
        :param session: SQLAlchemy ORM Session
        """
        if TYPE_CHECKING:
            assert self.task

        self.test_mode = test_mode
        self.refresh_from_task(self.task, pool_override=pool)
        self.refresh_from_db(session=session)

        self.job_id = job_id
        self.hostname = get_hostname()
        self.pid = os.getpid()
        if not test_mode:
            session.merge(self)
            session.commit()
        actual_start_date = timezone.utcnow()
        Stats.incr(f"ti.start.{self.task.dag_id}.{self.task.task_id}", tags=self.stats_tags)
        # Same metric with tagging
        Stats.incr("ti.start", tags=self.stats_tags)
        # Initialize final state counters at zero
        for state in State.task_states:
            Stats.incr(
                f"ti.finish.{self.task.dag_id}.{self.task.task_id}.{state}",
                count=0,
                tags=self.stats_tags,
            )
            # Same metric with tagging
            Stats.incr(
                "ti.finish",
                count=0,
                tags={**self.stats_tags, "state": str(state)},
            )
        with set_current_task_instance_session(session=session):
            self.task = self.task.prepare_for_execution()
            context = self.get_template_context(ignore_param_exceptions=False)

            try:
                if not mark_success:
                    self._execute_task_with_callbacks(context, test_mode, session=session)
                if not test_mode:
                    self.refresh_from_db(lock_for_update=True, session=session)
                self.state = TaskInstanceState.SUCCESS
            except TaskDeferred as defer:
                # The task has signalled it wants to defer execution based on
                # a trigger.
                if raise_on_defer:
                    raise
                self.defer_task(defer=defer, session=session)
                self.log.info(
                    "Pausing task as DEFERRED. dag_id=%s, task_id=%s, run_id=%s, execution_date=%s, start_date=%s",
                    self.dag_id,
                    self.task_id,
                    self.run_id,
                    _date_or_empty(task_instance=self, attr="execution_date"),
                    _date_or_empty(task_instance=self, attr="start_date"),
                )
                if not test_mode:
                    session.add(Log(self.state, self))
                    session.merge(self)
                    session.commit()
                return TaskReturnCode.DEFERRED
            except AirflowSkipException as e:
                # Recording SKIP
                # log only if exception has any arguments to prevent log flooding
                if e.args:
                    self.log.info(e)
                if not test_mode:
                    self.refresh_from_db(lock_for_update=True, session=session)
                _run_finished_callback(callbacks=self.task.on_skipped_callback, context=context)
                session.commit()
                self.state = TaskInstanceState.SKIPPED
            except AirflowRescheduleException as reschedule_exception:
                self._handle_reschedule(actual_start_date, reschedule_exception, test_mode, session=session)
                session.commit()
                return None
            except (AirflowFailException, AirflowSensorTimeout) as e:
                # If AirflowFailException is raised, task should not retry.
                # If a sensor in reschedule mode reaches timeout, task should not retry.
                self.handle_failure(e, test_mode, context, force_fail=True, session=session)
                session.commit()
                raise
            except (AirflowTaskTimeout, AirflowException, AirflowTaskTerminated) as e:
                if not test_mode:
                    self.refresh_from_db(lock_for_update=True, session=session)
                # for case when task is marked as success/failed externally
                # or dagrun timed out and task is marked as skipped
                # current behavior doesn't hit the callbacks
                if self.state in State.finished:
                    self.clear_next_method_args()
                    session.merge(self)
                    session.commit()
                    return None
                else:
                    self.handle_failure(e, test_mode, context, session=session)
                    session.commit()
                    raise
            except SystemExit as e:
                # We have already handled SystemExit with success codes (0 and None) in the `_execute_task`.
                # Therefore, here we must handle only error codes.
                msg = f"Task failed due to SystemExit({e.code})"
                self.handle_failure(msg, test_mode, context, session=session)
                session.commit()
                raise AirflowException(msg)
            except BaseException as e:
                self.handle_failure(e, test_mode, context, session=session)
                session.commit()
                raise
            finally:
                Stats.incr(f"ti.finish.{self.dag_id}.{self.task_id}.{self.state}", tags=self.stats_tags)
                # Same metric with tagging
                Stats.incr("ti.finish", tags={**self.stats_tags, "state": str(self.state)})

            # Recording SKIPPED or SUCCESS
            self.clear_next_method_args()
            self.end_date = timezone.utcnow()
            _log_state(task_instance=self)
            self.set_duration()

            # run on_success_callback before db committing
            # otherwise, the LocalTaskJob sees the state is changed to `success`,
            # but the task_runner is still running, LocalTaskJob then treats the state is set externally!
            _run_finished_callback(callbacks=self.task.on_success_callback, context=context)

            if not test_mode:
                session.add(Log(self.state, self))
                session.merge(self).task = self.task
                if self.state == TaskInstanceState.SUCCESS:
                    self._register_dataset_changes(session=session)

                session.commit()
                if self.state == TaskInstanceState.SUCCESS:
                    get_listener_manager().hook.on_task_instance_success(
                        previous_state=TaskInstanceState.RUNNING, task_instance=self, session=session
                    )

            return None

    def _register_dataset_changes(self, *, session: Session) -> None:
        if TYPE_CHECKING:
            assert self.task

        for obj in self.task.outlets or []:
            self.log.debug("outlet obj %s", obj)
            # Lineage can have other types of objects besides datasets
            if isinstance(obj, Dataset):
                dataset_manager.register_dataset_change(
                    task_instance=self,
                    dataset=obj,
                    session=session,
                )

    def _execute_task_with_callbacks(self, context: Context, test_mode: bool = False, *, session: Session):
        """Prepare Task for Execution."""
        from airflow.models.renderedtifields import RenderedTaskInstanceFields

        if TYPE_CHECKING:
            assert self.task

        parent_pid = os.getpid()

        def signal_handler(signum, frame):
            pid = os.getpid()

            # If a task forks during execution (from DAG code) for whatever
            # reason, we want to make sure that we react to the signal only in
            # the process that we've spawned ourselves (referred to here as the
            # parent process).
            if pid != parent_pid:
                os._exit(1)
                return
            self.log.error("Received SIGTERM. Terminating subprocesses.")
            self.task.on_kill()
            raise AirflowTaskTerminated("Task received SIGTERM signal")

        signal.signal(signal.SIGTERM, signal_handler)

        # Don't clear Xcom until the task is certain to execute, and check if we are resuming from deferral.
        if not self.next_method:
            self.clear_xcom_data()

        with Stats.timer(f"dag.{self.task.dag_id}.{self.task.task_id}.duration"), Stats.timer(
            "task.duration", tags=self.stats_tags
        ):
            # Set the validated/merged params on the task object.
            self.task.params = context["params"]

            with set_current_context(context):
                dag = self.task.get_dag()
                if dag is not None:
                    jinja_env = dag.get_template_env()
                else:
                    jinja_env = None
                task_orig = self.render_templates(context=context, jinja_env=jinja_env)

            if not test_mode:
                rtif = RenderedTaskInstanceFields(ti=self, render_templates=False)
                RenderedTaskInstanceFields.write(rtif)
                RenderedTaskInstanceFields.delete_old_records(self.task_id, self.dag_id)

            # Export context to make it available for operators to use.
            airflow_context_vars = context_to_airflow_vars(context, in_env_var_format=True)
            os.environ.update(airflow_context_vars)

            # Log context only for the default execution method, the assumption
            # being that otherwise we're resuming a deferred task (in which
            # case there's no need to log these again).
            if not self.next_method:
                self.log.info(
                    "Exporting env vars: %s",
                    " ".join(f"{k}={v!r}" for k, v in airflow_context_vars.items()),
                )

            # Run pre_execute callback
            # Is never MappedOperator at this point
            self.task.pre_execute(context=context)  # type: ignore[union-attr]

            # Run on_execute callback
            self._run_execute_callback(context, self.task)

            # Run on_task_instance_running event
            get_listener_manager().hook.on_task_instance_running(
                previous_state=TaskInstanceState.QUEUED, task_instance=self, session=session
            )

            def _render_map_index(context: Context, *, jinja_env: jinja2.Environment | None) -> str | None:
                """Render named map index if the DAG author defined map_index_template at the task level."""
                if jinja_env is None or (template := context.get("map_index_template")) is None:
                    return None
                rendered_map_index = jinja_env.from_string(template).render(context)
                log.debug("Map index rendered as %s", rendered_map_index)
                return rendered_map_index

            # Execute the task.
            with set_current_context(context):
                try:
                    result = self._execute_task(context, task_orig)
                except Exception:
                    # If the task failed, swallow rendering error so it doesn't mask the main error.
                    with contextlib.suppress(jinja2.TemplateSyntaxError, jinja2.UndefinedError):
                        self.rendered_map_index = _render_map_index(context, jinja_env=jinja_env)
                    raise
                else:  # If the task succeeded, render normally to let rendering error bubble up.
                    self.rendered_map_index = _render_map_index(context, jinja_env=jinja_env)

            # Run post_execute callback
            # Is never MappedOperator at this point
            self.task.post_execute(context=context, result=result)  # type: ignore[union-attr]

        Stats.incr(f"operator_successes_{self.task.task_type}", tags=self.stats_tags)
        # Same metric with tagging
        Stats.incr("operator_successes", tags={**self.stats_tags, "task_type": self.task.task_type})
        Stats.incr("ti_successes", tags=self.stats_tags)

    def _execute_task(self, context, task_orig):
        """
        Execute Task (optionally with a Timeout) and push Xcom results.

        :param context: Jinja2 context
        :param task_orig: origin task
        """
        return _execute_task(self, context, task_orig)

    @provide_session
    def defer_task(self, session: Session, defer: TaskDeferred) -> None:
        """Mark the task as deferred and sets up the trigger that is needed to resume it.

        :meta: private
        """
        from airflow.models.trigger import Trigger

        if TYPE_CHECKING:
            assert self.task

        # First, make the trigger entry
        trigger_row = Trigger.from_object(defer.trigger)
        session.add(trigger_row)
        session.flush()

        # Then, update ourselves so it matches the deferral request
        # Keep an eye on the logic in `check_and_change_state_before_execution()`
        # depending on self.next_method semantics
        self.state = TaskInstanceState.DEFERRED
        self.trigger_id = trigger_row.id
        self.next_method = defer.method_name
        self.next_kwargs = defer.kwargs or {}

        # Decrement try number so the next one is the same try
        self._try_number -= 1

        # Calculate timeout too if it was passed
        if defer.timeout is not None:
            self.trigger_timeout = timezone.utcnow() + defer.timeout
        else:
            self.trigger_timeout = None

        # If an execution_timeout is set, set the timeout to the minimum of
        # it and the trigger timeout
        execution_timeout = self.task.execution_timeout
        if execution_timeout:
            if self.trigger_timeout:
                self.trigger_timeout = min(self.start_date + execution_timeout, self.trigger_timeout)
            else:
                self.trigger_timeout = self.start_date + execution_timeout

    def _run_execute_callback(self, context: Context, task: Operator) -> None:
        """Functions that need to be run before a Task is executed."""
        callbacks = task.on_execute_callback
        if callbacks:
            callbacks = callbacks if isinstance(callbacks, list) else [callbacks]
            for callback in callbacks:
                try:
                    callback(context)
                except Exception:
                    self.log.exception("Failed when executing execute callback")

    @provide_session
    def run(
        self,
        verbose: bool = True,
        ignore_all_deps: bool = False,
        ignore_depends_on_past: bool = False,
        wait_for_past_depends_before_skipping: bool = False,
        ignore_task_deps: bool = False,
        ignore_ti_state: bool = False,
        mark_success: bool = False,
        test_mode: bool = False,
        job_id: str | None = None,
        pool: str | None = None,
        session: Session = NEW_SESSION,
        raise_on_defer: bool = False,
    ) -> None:
        """Run TaskInstance."""
        res = self.check_and_change_state_before_execution(
            verbose=verbose,
            ignore_all_deps=ignore_all_deps,
            ignore_depends_on_past=ignore_depends_on_past,
            wait_for_past_depends_before_skipping=wait_for_past_depends_before_skipping,
            ignore_task_deps=ignore_task_deps,
            ignore_ti_state=ignore_ti_state,
            mark_success=mark_success,
            test_mode=test_mode,
            job_id=job_id,
            pool=pool,
            session=session,
        )
        if not res:
            return

        self._run_raw_task(
            mark_success=mark_success,
            test_mode=test_mode,
            job_id=job_id,
            pool=pool,
            session=session,
            raise_on_defer=raise_on_defer,
        )

    def dry_run(self) -> None:
        """Only Renders Templates for the TI."""
        if TYPE_CHECKING:
            assert self.task

        self.task = self.task.prepare_for_execution()
        self.render_templates()
        if TYPE_CHECKING:
            assert isinstance(self.task, BaseOperator)
        self.task.dry_run()

    @provide_session
    def _handle_reschedule(
        self,
        actual_start_date: datetime,
        reschedule_exception: AirflowRescheduleException,
        test_mode: bool = False,
        session: Session = NEW_SESSION,
    ):
        # Don't record reschedule request in test mode
        if test_mode:
            return

        from airflow.models.dagrun import DagRun  # Avoid circular import

        self.refresh_from_db(session)

        if TYPE_CHECKING:
            assert self.task

        self.end_date = timezone.utcnow()
        self.set_duration()

        # Lock DAG run to be sure not to get into a deadlock situation when trying to insert
        # TaskReschedule which apparently also creates lock on corresponding DagRun entity
        with_row_locks(
            session.query(DagRun).filter_by(
                dag_id=self.dag_id,
                run_id=self.run_id,
            ),
            session=session,
        ).one()

        # Log reschedule request
        session.add(
            TaskReschedule(
                self.task,
                self.run_id,
                self._try_number,
                actual_start_date,
                self.end_date,
                reschedule_exception.reschedule_date,
                self.map_index,
            )
        )

        # set state
        self.state = TaskInstanceState.UP_FOR_RESCHEDULE

        # Decrement try_number so subsequent runs will use the same try number and write
        # to same log file.
        self._try_number -= 1

        self.clear_next_method_args()

        session.merge(self)
        session.commit()
        self.log.info("Rescheduling task, marking task as UP_FOR_RESCHEDULE")

    @staticmethod
    def get_truncated_error_traceback(error: BaseException, truncate_to: Callable) -> TracebackType | None:
        """
        Truncate the traceback of an exception to the first frame called from within a given function.

        :param error: exception to get traceback from
        :param truncate_to: Function to truncate TB to. Must have a ``__code__`` attribute

        :meta private:
        """
        tb = error.__traceback__
        code = truncate_to.__func__.__code__  # type: ignore[attr-defined]
        while tb is not None:
            if tb.tb_frame.f_code is code:
                return tb.tb_next
            tb = tb.tb_next
        return tb or error.__traceback__

    @classmethod
    @internal_api_call
    @provide_session
    def fetch_handle_failure_context(
        cls,
        ti: TaskInstance | TaskInstancePydantic,
        error: None | str | BaseException,
        test_mode: bool | None = None,
        context: Context | None = None,
        force_fail: bool = False,
        session: Session = NEW_SESSION,
    ):
        """Handle Failure for the TaskInstance."""
        get_listener_manager().hook.on_task_instance_failed(
            previous_state=TaskInstanceState.RUNNING, task_instance=ti, session=session
        )

        if error:
            if isinstance(error, BaseException):
                tb = TaskInstance.get_truncated_error_traceback(error, truncate_to=ti._execute_task)
                cls.logger().error("Task failed with exception", exc_info=(type(error), error, tb))
            else:
                cls.logger().error("%s", error)
        if not test_mode:
            ti.refresh_from_db(session)

        ti.end_date = timezone.utcnow()
        ti.set_duration()

        Stats.incr(f"operator_failures_{ti.operator}", tags=ti.stats_tags)
        # Same metric with tagging
        Stats.incr("operator_failures", tags={**ti.stats_tags, "operator": ti.operator})
        Stats.incr("ti_failures", tags=ti.stats_tags)

        if not test_mode:
            session.add(Log(TaskInstanceState.FAILED.value, ti))

            # Log failure duration
            session.add(TaskFail(ti=ti))

        ti.clear_next_method_args()

        # In extreme cases (zombie in case of dag with parse error) we might _not_ have a Task.
        if context is None and getattr(ti, "task", None):
            context = ti.get_template_context(session)

        if context is not None:
            context["exception"] = error

        # Set state correctly and figure out how to log it and decide whether
        # to email

        # Note, callback invocation needs to be handled by caller of
        # _run_raw_task to avoid race conditions which could lead to duplicate
        # invocations or miss invocation.

        # Since this function is called only when the TaskInstance state is running,
        # try_number contains the current try_number (not the next). We
        # only mark task instance as FAILED if the next task instance
        # try_number exceeds the max_tries ... or if force_fail is truthy

        task: BaseOperator | None = None
        try:
            if getattr(ti, "task", None) and context:
                if TYPE_CHECKING:
                    assert ti.task
                task = ti.task.unmap((context, session))
        except Exception:
            cls.logger().error("Unable to unmap task to determine if we need to send an alert email")

        if force_fail or not ti.is_eligible_to_retry():
            ti.state = TaskInstanceState.FAILED
            email_for_state = operator.attrgetter("email_on_failure")
            callbacks = task.on_failure_callback if task else None

            if task and task.dag and task.dag.fail_stop:
                _stop_remaining_tasks(task_instance=ti, session=session)
        else:
            if ti.state == TaskInstanceState.QUEUED:
                # We increase the try_number to fail the task if it fails to start after sometime
                ti._try_number += 1
            ti.state = State.UP_FOR_RETRY
            email_for_state = operator.attrgetter("email_on_retry")
            callbacks = task.on_retry_callback if task else None

        return {
            "ti": ti,
            "email_for_state": email_for_state,
            "task": task,
            "callbacks": callbacks,
            "context": context,
        }

    @staticmethod
    @internal_api_call
    @provide_session
    def save_to_db(ti: TaskInstance | TaskInstancePydantic, session: Session = NEW_SESSION):
        session.merge(ti)
        session.flush()

    @provide_session
    def handle_failure(
        self,
        error: None | str | BaseException,
        test_mode: bool | None = None,
        context: Context | None = None,
        force_fail: bool = False,
        session: Session = NEW_SESSION,
    ) -> None:
        """
        Handle Failure for a task instance.

        :param error: if specified, log the specific exception if thrown
        :param session: SQLAlchemy ORM Session
        :param test_mode: doesn't record success or failure in the DB if True
        :param context: Jinja2 context
        :param force_fail: if True, task does not retry
        """
        _handle_failure(
            task_instance=self,
            error=error,
            session=session,
            test_mode=test_mode,
            context=context,
            force_fail=force_fail,
        )

    def is_eligible_to_retry(self):
        """Is task instance is eligible for retry."""
        return _is_eligible_to_retry(task_instance=self)

    def get_template_context(
        self,
        session: Session | None = None,
        ignore_param_exceptions: bool = True,
    ) -> Context:
        """
        Return TI Context.

        :param session: SQLAlchemy ORM Session
        :param ignore_param_exceptions: flag to suppress value exceptions while initializing the ParamsDict
        """
        return _get_template_context(
            task_instance=self,
            session=session,
            ignore_param_exceptions=ignore_param_exceptions,
        )

    @provide_session
    def get_rendered_template_fields(self, session: Session = NEW_SESSION) -> None:
        """
        Update task with rendered template fields for presentation in UI.

        If task has already run, will fetch from DB; otherwise will render.
        """
        from airflow.models.renderedtifields import RenderedTaskInstanceFields

        if TYPE_CHECKING:
            assert self.task

        rendered_task_instance_fields = RenderedTaskInstanceFields.get_templated_fields(self, session=session)
        if rendered_task_instance_fields:
            self.task = self.task.unmap(None)
            for field_name, rendered_value in rendered_task_instance_fields.items():
                setattr(self.task, field_name, rendered_value)
            return

        try:
            # If we get here, either the task hasn't run or the RTIF record was purged.
            from airflow.utils.log.secrets_masker import redact

            self.render_templates()
            for field_name in self.task.template_fields:
                rendered_value = getattr(self.task, field_name)
                setattr(self.task, field_name, redact(rendered_value, field_name))
        except (TemplateAssertionError, UndefinedError) as e:
            raise AirflowException(
                "Webserver does not have access to User-defined Macros or Filters "
                "when Dag Serialization is enabled. Hence for the task that have not yet "
                "started running, please use 'airflow tasks render' for debugging the "
                "rendering of template_fields."
            ) from e

    def overwrite_params_with_dag_run_conf(self, params: dict, dag_run: DagRun):
        """Overwrite Task Params with DagRun.conf."""
        if dag_run and dag_run.conf:
            self.log.debug("Updating task params (%s) with DagRun.conf (%s)", params, dag_run.conf)
            params.update(dag_run.conf)

    def render_templates(
        self, context: Context | None = None, jinja_env: jinja2.Environment | None = None
    ) -> Operator:
        """Render templates in the operator fields.

        If the task was originally mapped, this may replace ``self.task`` with
        the unmapped, fully rendered BaseOperator. The original ``self.task``
        before replacement is returned.
        """
        if not context:
            context = self.get_template_context()
        original_task = self.task

        if TYPE_CHECKING:
            assert original_task

        # If self.task is mapped, this call replaces self.task to point to the
        # unmapped BaseOperator created by this function! This is because the
        # MappedOperator is useless for template rendering, and we need to be
        # able to access the unmapped task instead.
        original_task.render_template_fields(context, jinja_env)

        return original_task

    def render_k8s_pod_yaml(self) -> dict | None:
        """Render the k8s pod yaml."""
        try:
            from airflow.providers.cncf.kubernetes.template_rendering import (
                render_k8s_pod_yaml as render_k8s_pod_yaml_from_provider,
            )
        except ImportError:
            raise RuntimeError(
                "You need to have the `cncf.kubernetes` provider installed to use this feature. "
                "Also rather than calling it directly you should import "
                "render_k8s_pod_yaml from airflow.providers.cncf.kubernetes.template_rendering "
                "and call it with TaskInstance as the first argument."
            )
        warnings.warn(
            "You should not call `task_instance.render_k8s_pod_yaml` directly. This method will be removed"
            "in Airflow 3. Rather than calling it directly you should import "
            "`render_k8s_pod_yaml` from `airflow.providers.cncf.kubernetes.template_rendering` "
            "and call it with `TaskInstance` as the first argument.",
            DeprecationWarning,
            stacklevel=2,
        )
        return render_k8s_pod_yaml_from_provider(self)

    @provide_session
    def get_rendered_k8s_spec(self, session: Session = NEW_SESSION):
        """Render the k8s pod yaml."""
        try:
            from airflow.providers.cncf.kubernetes.template_rendering import (
                get_rendered_k8s_spec as get_rendered_k8s_spec_from_provider,
            )
        except ImportError:
            raise RuntimeError(
                "You need to have the `cncf.kubernetes` provider installed to use this feature. "
                "Also rather than calling it directly you should import "
                "`get_rendered_k8s_spec` from `airflow.providers.cncf.kubernetes.template_rendering` "
                "and call it with `TaskInstance` as the first argument."
            )
        warnings.warn(
            "You should not call `task_instance.render_k8s_pod_yaml` directly. This method will be removed"
            "in Airflow 3. Rather than calling it directly you should import "
            "`get_rendered_k8s_spec` from `airflow.providers.cncf.kubernetes.template_rendering` "
            "and call it with `TaskInstance` as the first argument.",
            DeprecationWarning,
            stacklevel=2,
        )
        return get_rendered_k8s_spec_from_provider(self, session=session)

    def get_email_subject_content(
        self, exception: BaseException, task: BaseOperator | None = None
    ) -> tuple[str, str, str]:
        """
        Get the email subject content for exceptions.

        :param exception: the exception sent in the email
        :param task:
        """
        return _get_email_subject_content(task_instance=self, exception=exception, task=task)

    def email_alert(self, exception, task: BaseOperator) -> None:
        """
        Send alert email with exception information.

        :param exception: the exception
        :param task: task related to the exception
        """
        _email_alert(task_instance=self, exception=exception, task=task)

    def set_duration(self) -> None:
        """Set task instance duration."""
        _set_duration(task_instance=self)

    @provide_session
    def xcom_push(
        self,
        key: str,
        value: Any,
        execution_date: datetime | None = None,
        session: Session = NEW_SESSION,
    ) -> None:
        """
        Make an XCom available for tasks to pull.

        :param key: Key to store the value under.
        :param value: Value to store. What types are possible depends on whether
            ``enable_xcom_pickling`` is true or not. If so, this can be any
            picklable object; only be JSON-serializable may be used otherwise.
        :param execution_date: Deprecated parameter that has no effect.
        """
        if execution_date is not None:
            self_execution_date = self.get_dagrun(session).execution_date
            if execution_date < self_execution_date:
                raise ValueError(
                    f"execution_date can not be in the past (current execution_date is "
                    f"{self_execution_date}; received {execution_date})"
                )
            elif execution_date is not None:
                message = "Passing 'execution_date' to 'TaskInstance.xcom_push()' is deprecated."
                warnings.warn(message, RemovedInAirflow3Warning, stacklevel=3)

        XCom.set(
            key=key,
            value=value,
            task_id=self.task_id,
            dag_id=self.dag_id,
            run_id=self.run_id,
            map_index=self.map_index,
            session=session,
        )

    @provide_session
    def xcom_pull(
        self,
        task_ids: str | Iterable[str] | None = None,
        dag_id: str | None = None,
        key: str = XCOM_RETURN_KEY,
        include_prior_dates: bool = False,
        session: Session = NEW_SESSION,
        *,
        map_indexes: int | Iterable[int] | None = None,
        default: Any = None,
    ) -> Any:
        """Pull XComs that optionally meet certain criteria.

        :param key: A key for the XCom. If provided, only XComs with matching
            keys will be returned. The default key is ``'return_value'``, also
            available as constant ``XCOM_RETURN_KEY``. This key is automatically
            given to XComs returned by tasks (as opposed to being pushed
            manually). To remove the filter, pass *None*.
        :param task_ids: Only XComs from tasks with matching ids will be
            pulled. Pass *None* to remove the filter.
        :param dag_id: If provided, only pulls XComs from this DAG. If *None*
            (default), the DAG of the calling task is used.
        :param map_indexes: If provided, only pull XComs with matching indexes.
            If *None* (default), this is inferred from the task(s) being pulled
            (see below for details).
        :param include_prior_dates: If False, only XComs from the current
            execution_date are returned. If *True*, XComs from previous dates
            are returned as well.

        When pulling one single task (``task_id`` is *None* or a str) without
        specifying ``map_indexes``, the return value is inferred from whether
        the specified task is mapped. If not, value from the one single task
        instance is returned. If the task to pull is mapped, an iterator (not a
        list) yielding XComs from mapped task instances is returned. In either
        case, ``default`` (*None* if not specified) is returned if no matching
        XComs are found.

        When pulling multiple tasks (i.e. either ``task_id`` or ``map_index`` is
        a non-str iterable), a list of matching XComs is returned. Elements in
        the list is ordered by item ordering in ``task_id`` and ``map_index``.
        """
        if dag_id is None:
            dag_id = self.dag_id

        query = XCom.get_many(
            key=key,
            run_id=self.run_id,
            dag_ids=dag_id,
            task_ids=task_ids,
            map_indexes=map_indexes,
            include_prior_dates=include_prior_dates,
            session=session,
        )

        # NOTE: Since we're only fetching the value field and not the whole
        # class, the @recreate annotation does not kick in. Therefore we need to
        # call XCom.deserialize_value() manually.

        # We are only pulling one single task.
        if (task_ids is None or isinstance(task_ids, str)) and not isinstance(map_indexes, Iterable):
            first = query.with_entities(
                XCom.run_id, XCom.task_id, XCom.dag_id, XCom.map_index, XCom.value
            ).first()
            if first is None:  # No matching XCom at all.
                return default
            if map_indexes is not None or first.map_index < 0:
                return XCom.deserialize_value(first)
            query = query.order_by(None).order_by(XCom.map_index.asc())
            return LazyXComAccess.build_from_xcom_query(query)

        # At this point either task_ids or map_indexes is explicitly multi-value.
        # Order return values to match task_ids and map_indexes ordering.
        query = query.order_by(None)
        if task_ids is None or isinstance(task_ids, str):
            query = query.order_by(XCom.task_id)
        else:
            task_id_whens = {tid: i for i, tid in enumerate(task_ids)}
            if task_id_whens:
                query = query.order_by(case(task_id_whens, value=XCom.task_id))
            else:
                query = query.order_by(XCom.task_id)
        if map_indexes is None or isinstance(map_indexes, int):
            query = query.order_by(XCom.map_index)
        elif isinstance(map_indexes, range):
            order = XCom.map_index
            if map_indexes.step < 0:
                order = order.desc()
            query = query.order_by(order)
        else:
            map_index_whens = {map_index: i for i, map_index in enumerate(map_indexes)}
            if map_index_whens:
                query = query.order_by(case(map_index_whens, value=XCom.map_index))
            else:
                query = query.order_by(XCom.map_index)
        return LazyXComAccess.build_from_xcom_query(query)

    @provide_session
    def get_num_running_task_instances(self, session: Session, same_dagrun: bool = False) -> int:
        """Return Number of running TIs from the DB."""
        # .count() is inefficient
        num_running_task_instances_query = session.query(func.count()).filter(
            TaskInstance.dag_id == self.dag_id,
            TaskInstance.task_id == self.task_id,
            TaskInstance.state == TaskInstanceState.RUNNING,
        )
        if same_dagrun:
            num_running_task_instances_query = num_running_task_instances_query.filter(
                TaskInstance.run_id == self.run_id
            )
        return num_running_task_instances_query.scalar()

    def init_run_context(self, raw: bool = False) -> None:
        """Set the log context."""
        self.raw = raw
        self._set_context(self)

    @staticmethod
    def filter_for_tis(tis: Iterable[TaskInstance | TaskInstanceKey]) -> BooleanClauseList | None:
        """Return SQLAlchemy filter to query selected task instances."""
        # DictKeys type, (what we often pass here from the scheduler) is not directly indexable :(
        # Or it might be a generator, but we need to be able to iterate over it more than once
        tis = list(tis)

        if not tis:
            return None

        first = tis[0]

        dag_id = first.dag_id
        run_id = first.run_id
        map_index = first.map_index
        first_task_id = first.task_id

        # pre-compute the set of dag_id, run_id, map_indices and task_ids
        dag_ids, run_ids, map_indices, task_ids = set(), set(), set(), set()
        for t in tis:
            dag_ids.add(t.dag_id)
            run_ids.add(t.run_id)
            map_indices.add(t.map_index)
            task_ids.add(t.task_id)

        # Common path optimisations: when all TIs are for the same dag_id and run_id, or same dag_id
        # and task_id -- this can be over 150x faster for huge numbers of TIs (20k+)
        if dag_ids == {dag_id} and run_ids == {run_id} and map_indices == {map_index}:
            return and_(
                TaskInstance.dag_id == dag_id,
                TaskInstance.run_id == run_id,
                TaskInstance.map_index == map_index,
                TaskInstance.task_id.in_(task_ids),
            )
        if dag_ids == {dag_id} and task_ids == {first_task_id} and map_indices == {map_index}:
            return and_(
                TaskInstance.dag_id == dag_id,
                TaskInstance.run_id.in_(run_ids),
                TaskInstance.map_index == map_index,
                TaskInstance.task_id == first_task_id,
            )
        if dag_ids == {dag_id} and run_ids == {run_id} and task_ids == {first_task_id}:
            return and_(
                TaskInstance.dag_id == dag_id,
                TaskInstance.run_id == run_id,
                TaskInstance.map_index.in_(map_indices),
                TaskInstance.task_id == first_task_id,
            )

        filter_condition = []
        # create 2 nested groups, both primarily grouped by dag_id and run_id,
        # and in the nested group 1 grouped by task_id the other by map_index.
        task_id_groups: dict[tuple, dict[Any, list[Any]]] = defaultdict(lambda: defaultdict(list))
        map_index_groups: dict[tuple, dict[Any, list[Any]]] = defaultdict(lambda: defaultdict(list))
        for t in tis:
            task_id_groups[(t.dag_id, t.run_id)][t.task_id].append(t.map_index)
            map_index_groups[(t.dag_id, t.run_id)][t.map_index].append(t.task_id)

        # this assumes that most dags have dag_id as the largest grouping, followed by run_id. even
        # if its not, this is still  a significant optimization over querying for every single tuple key
        for cur_dag_id, cur_run_id in itertools.product(dag_ids, run_ids):
            # we compare the group size between task_id and map_index and use the smaller group
            dag_task_id_groups = task_id_groups[(cur_dag_id, cur_run_id)]
            dag_map_index_groups = map_index_groups[(cur_dag_id, cur_run_id)]

            if len(dag_task_id_groups) <= len(dag_map_index_groups):
                for cur_task_id, cur_map_indices in dag_task_id_groups.items():
                    filter_condition.append(
                        and_(
                            TaskInstance.dag_id == cur_dag_id,
                            TaskInstance.run_id == cur_run_id,
                            TaskInstance.task_id == cur_task_id,
                            TaskInstance.map_index.in_(cur_map_indices),
                        )
                    )
            else:
                for cur_map_index, cur_task_ids in dag_map_index_groups.items():
                    filter_condition.append(
                        and_(
                            TaskInstance.dag_id == cur_dag_id,
                            TaskInstance.run_id == cur_run_id,
                            TaskInstance.task_id.in_(cur_task_ids),
                            TaskInstance.map_index == cur_map_index,
                        )
                    )

        return or_(*filter_condition)

    @classmethod
    def ti_selector_condition(cls, vals: Collection[str | tuple[str, int]]) -> ColumnOperators:
        """
        Build an SQLAlchemy filter for a list of task_ids or tuples of (task_id,map_index).

        :meta private:
        """
        # Compute a filter for TI.task_id and TI.map_index based on input values
        # For each item, it will either be a task_id, or (task_id, map_index)
        task_id_only = [v for v in vals if isinstance(v, str)]
        with_map_index = [v for v in vals if not isinstance(v, str)]

        filters: list[ColumnOperators] = []
        if task_id_only:
            filters.append(cls.task_id.in_(task_id_only))
        if with_map_index:
            filters.append(tuple_in_condition((cls.task_id, cls.map_index), with_map_index))

        if not filters:
            return false()
        if len(filters) == 1:
            return filters[0]
        return or_(*filters)

    @classmethod
    @internal_api_call
    @provide_session
    def _schedule_downstream_tasks(
        cls,
        ti: TaskInstance | TaskInstancePydantic,
        session: Session = NEW_SESSION,
        max_tis_per_query: int | None = None,
    ):
        from sqlalchemy.exc import OperationalError

        from airflow.models.dagrun import DagRun

        try:
            # Re-select the row with a lock
            dag_run = with_row_locks(
                session.query(DagRun).filter_by(
                    dag_id=ti.dag_id,
                    run_id=ti.run_id,
                ),
                session=session,
                skip_locked=True,
            ).one_or_none()

            if not dag_run:
                cls.logger().debug("Skip locked rows, rollback")
                session.rollback()
                return

            task = ti.task
            if TYPE_CHECKING:
                assert task
                assert task.dag

            # Get a partial DAG with just the specific tasks we want to examine.
            # In order for dep checks to work correctly, we include ourself (so
            # TriggerRuleDep can check the state of the task we just executed).
            partial_dag = task.dag.partial_subset(
                task.downstream_task_ids,
                include_downstream=True,
                include_upstream=False,
                include_direct_upstream=True,
            )

            dag_run.dag = partial_dag
            info = dag_run.task_instance_scheduling_decisions(session)

            skippable_task_ids = {
                task_id for task_id in partial_dag.task_ids if task_id not in task.downstream_task_ids
            }

            schedulable_tis = [
                ti
                for ti in info.schedulable_tis
                if ti.task_id not in skippable_task_ids
                and not (
                    ti.task.inherits_from_empty_operator
                    and not ti.task.on_execute_callback
                    and not ti.task.on_success_callback
                    and not ti.task.outlets
                )
            ]
            for schedulable_ti in schedulable_tis:
                if getattr(schedulable_ti, "task", None) is None:
                    schedulable_ti.task = task.dag.get_task(schedulable_ti.task_id)

            num = dag_run.schedule_tis(schedulable_tis, session=session, max_tis_per_query=max_tis_per_query)
            cls.logger().info("%d downstream tasks scheduled from follow-on schedule check", num)

            session.flush()

        except OperationalError as e:
            # Any kind of DB error here is _non fatal_ as this block is just an optimisation.
            cls.logger().warning(
                "Skipping mini scheduling run due to exception: %s",
                e.statement,
                exc_info=True,
            )
            session.rollback()

    @provide_session
    def schedule_downstream_tasks(self, session: Session = NEW_SESSION, max_tis_per_query: int | None = None):
        """
        Schedule downstream tasks of this task instance.

        :meta: private
        """
        return TaskInstance._schedule_downstream_tasks(
            ti=self, session=session, max_tis_per_query=max_tis_per_query
        )

    def get_relevant_upstream_map_indexes(
        self,
        upstream: Operator,
        ti_count: int | None,
        *,
        session: Session,
    ) -> int | range | None:
        """Infer the map indexes of an upstream "relevant" to this ti.

        The bulk of the logic mainly exists to solve the problem described by
        the following example, where 'val' must resolve to different values,
        depending on where the reference is being used::

            @task
            def this_task(v):  # This is self.task.
                return v * 2


            @task_group
            def tg1(inp):
                val = upstream(inp)  # This is the upstream task.
                this_task(val)  # When inp is 1, val here should resolve to 2.
                return val


            # This val is the same object returned by tg1.
            val = tg1.expand(inp=[1, 2, 3])


            @task_group
            def tg2(inp):
                another_task(inp, val)  # val here should resolve to [2, 4, 6].


            tg2.expand(inp=["a", "b"])

        The surrounding mapped task groups of ``upstream`` and ``self.task`` are
        inspected to find a common "ancestor". If such an ancestor is found,
        we need to return specific map indexes to pull a partial value from
        upstream XCom.

        :param upstream: The referenced upstream task.
        :param ti_count: The total count of task instance this task was expanded
            by the scheduler, i.e. ``expanded_ti_count`` in the template context.
        :return: Specific map index or map indexes to pull, or ``None`` if we
            want to "whole" return value (i.e. no mapped task groups involved).
        """
        if TYPE_CHECKING:
            assert self.task

        # This value should never be None since we already know the current task
        # is in a mapped task group, and should have been expanded, despite that,
        # we need to check that it is not None to satisfy Mypy.
        # But this value can be 0 when we expand an empty list, for that it is
        # necessary to check that ti_count is not 0 to avoid dividing by 0.
        if not ti_count:
            return None

        # Find the innermost common mapped task group between the current task
        # If the current task and the referenced task does not have a common
        # mapped task group, the two are in different task mapping contexts
        # (like another_task above), and we should use the "whole" value.
        common_ancestor = _find_common_ancestor_mapped_group(self.task, upstream)
        if common_ancestor is None:
            return None

        # At this point we know the two tasks share a mapped task group, and we
        # should use a "partial" value. Let's break down the mapped ti count
        # between the ancestor and further expansion happened inside it.
        ancestor_ti_count = common_ancestor.get_mapped_ti_count(self.run_id, session=session)
        ancestor_map_index = self.map_index * ancestor_ti_count // ti_count

        # If the task is NOT further expanded inside the common ancestor, we
        # only want to reference one single ti. We must walk the actual DAG,
        # and "ti_count == ancestor_ti_count" does not work, since the further
        # expansion may be of length 1.
        if not _is_further_mapped_inside(upstream, common_ancestor):
            return ancestor_map_index

        # Otherwise we need a partial aggregation for values from selected task
        # instances in the ancestor's expansion context.
        further_count = ti_count // ancestor_ti_count
        map_index_start = ancestor_map_index * further_count
        return range(map_index_start, map_index_start + further_count)

    def clear_db_references(self, session: Session):
        """
        Clear db tables that have a reference to this instance.

        :param session: ORM Session

        :meta private:
        """
        from airflow.models.renderedtifields import RenderedTaskInstanceFields

        tables: list[type[TaskInstanceDependencies]] = [
            TaskFail,
            TaskInstanceNote,
            TaskReschedule,
            XCom,
            RenderedTaskInstanceFields,
            TaskMap,
        ]
        for table in tables:
            session.execute(
                delete(table).where(
                    table.dag_id == self.dag_id,
                    table.task_id == self.task_id,
                    table.run_id == self.run_id,
                    table.map_index == self.map_index,
                )
            )


def _find_common_ancestor_mapped_group(node1: Operator, node2: Operator) -> MappedTaskGroup | None:
    """Given two operators, find their innermost common mapped task group."""
    if node1.dag is None or node2.dag is None or node1.dag_id != node2.dag_id:
        return None
    parent_group_ids = {g.group_id for g in node1.iter_mapped_task_groups()}
    common_groups = (g for g in node2.iter_mapped_task_groups() if g.group_id in parent_group_ids)
    return next(common_groups, None)


def _is_further_mapped_inside(operator: Operator, container: TaskGroup) -> bool:
    """Whether given operator is *further* mapped inside a task group."""
    if isinstance(operator, MappedOperator):
        return True
    task_group = operator.task_group
    while task_group is not None and task_group.group_id != container.group_id:
        if isinstance(task_group, MappedTaskGroup):
            return True
        task_group = task_group.parent_group
    return False


# State of the task instance.
# Stores string version of the task state.
TaskInstanceStateType = Tuple[TaskInstanceKey, TaskInstanceState]


class SimpleTaskInstance:
    """
    Simplified Task Instance.

    Used to send data between processes via Queues.
    """

    def __init__(
        self,
        dag_id: str,
        task_id: str,
        run_id: str,
        start_date: datetime | None,
        end_date: datetime | None,
        try_number: int,
        map_index: int,
        state: str,
        executor_config: Any,
        pool: str,
        queue: str,
        key: TaskInstanceKey,
        run_as_user: str | None = None,
        priority_weight: int | None = None,
    ):
        self.dag_id = dag_id
        self.task_id = task_id
        self.run_id = run_id
        self.map_index = map_index
        self.start_date = start_date
        self.end_date = end_date
        self.try_number = try_number
        self.state = state
        self.executor_config = executor_config
        self.run_as_user = run_as_user
        self.pool = pool
        self.priority_weight = priority_weight
        self.queue = queue
        self.key = key

    def __eq__(self, other):
        if isinstance(other, self.__class__):
            return self.__dict__ == other.__dict__
        return NotImplemented

    def as_dict(self):
        warnings.warn(
            "This method is deprecated. Use BaseSerialization.serialize.",
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        new_dict = dict(self.__dict__)
        for key in new_dict:
            if key in ["start_date", "end_date"]:
                val = new_dict[key]
                if not val or isinstance(val, str):
                    continue
                new_dict.update({key: val.isoformat()})
        return new_dict

    @classmethod
    def from_ti(cls, ti: TaskInstance) -> SimpleTaskInstance:
        return cls(
            dag_id=ti.dag_id,
            task_id=ti.task_id,
            run_id=ti.run_id,
            map_index=ti.map_index,
            start_date=ti.start_date,
            end_date=ti.end_date,
            try_number=ti.try_number,
            state=ti.state,
            executor_config=ti.executor_config,
            pool=ti.pool,
            queue=ti.queue,
            key=ti.key,
            run_as_user=ti.run_as_user if hasattr(ti, "run_as_user") else None,
            priority_weight=ti.priority_weight if hasattr(ti, "priority_weight") else None,
        )

    @classmethod
    def from_dict(cls, obj_dict: dict) -> SimpleTaskInstance:
        warnings.warn(
            "This method is deprecated. Use BaseSerialization.deserialize.",
            RemovedInAirflow3Warning,
            stacklevel=2,
        )
        ti_key = TaskInstanceKey(*obj_dict.pop("key"))
        start_date = None
        end_date = None
        start_date_str: str | None = obj_dict.pop("start_date")
        end_date_str: str | None = obj_dict.pop("end_date")
        if start_date_str:
            start_date = timezone.parse(start_date_str)
        if end_date_str:
            end_date = timezone.parse(end_date_str)
        return cls(**obj_dict, start_date=start_date, end_date=end_date, key=ti_key)


class TaskInstanceNote(TaskInstanceDependencies):
    """For storage of arbitrary notes concerning the task instance."""

    __tablename__ = "task_instance_note"

    user_id = Column(Integer, ForeignKey("ab_user.id", name="task_instance_note_user_fkey"), nullable=True)
    task_id = Column(StringID(), primary_key=True, nullable=False)
    dag_id = Column(StringID(), primary_key=True, nullable=False)
    run_id = Column(StringID(), primary_key=True, nullable=False)
    map_index = Column(Integer, primary_key=True, nullable=False)
    content = Column(String(1000).with_variant(Text(1000), "mysql"))
    created_at = Column(UtcDateTime, default=timezone.utcnow, nullable=False)
    updated_at = Column(UtcDateTime, default=timezone.utcnow, onupdate=timezone.utcnow, nullable=False)

    task_instance = relationship("TaskInstance", back_populates="task_instance_note")

    __table_args__ = (
        PrimaryKeyConstraint("task_id", "dag_id", "run_id", "map_index", name="task_instance_note_pkey"),
        ForeignKeyConstraint(
            (dag_id, task_id, run_id, map_index),
            [
                "task_instance.dag_id",
                "task_instance.task_id",
                "task_instance.run_id",
                "task_instance.map_index",
            ],
            name="task_instance_note_ti_fkey",
            ondelete="CASCADE",
        ),
    )

    def __init__(self, content, user_id=None):
        self.content = content
        self.user_id = user_id

    def __repr__(self):
        prefix = f"<{self.__class__.__name__}: {self.dag_id}.{self.task_id} {self.run_id}"
        if self.map_index != -1:
            prefix += f" map_index={self.map_index}"
        return prefix + ">"


STATICA_HACK = True
globals()["kcah_acitats"[::-1].upper()] = False
if STATICA_HACK:  # pragma: no cover
    from airflow.jobs.job import Job

    TaskInstance.queued_by_job = relationship(Job)

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