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from __future__ import annotations
from datetime import timedelta
from functools import cached_property
from typing import TYPE_CHECKING, Any, Iterable, Sequence
from deprecated import deprecated
from airflow.configuration import conf
from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.emr import EmrContainerHook, EmrHook, EmrServerlessHook
from airflow.providers.amazon.aws.links.emr import EmrClusterLink, EmrLogsLink, get_log_uri
from airflow.providers.amazon.aws.triggers.emr import (
EmrContainerTrigger,
EmrStepSensorTrigger,
EmrTerminateJobFlowTrigger,
)
from airflow.sensors.base import BaseSensorOperator
if TYPE_CHECKING:
from airflow.utils.context import Context
[docs]class EmrBaseSensor(BaseSensorOperator):
"""
Contains general sensor behavior for EMR.
Subclasses should implement following methods:
- ``get_emr_response()``
- ``state_from_response()``
- ``failure_message_from_response()``
Subclasses should set ``target_states`` and ``failed_states`` fields.
:param aws_conn_id: aws connection to use
"""
def __init__(self, *, aws_conn_id: str = "aws_default", **kwargs):
super().__init__(**kwargs)
self.aws_conn_id = aws_conn_id
self.target_states: Iterable[str] = [] # will be set in subclasses
self.failed_states: Iterable[str] = [] # will be set in subclasses
@deprecated(reason="use `hook` property instead.")
[docs] def get_hook(self) -> EmrHook:
return self.hook
@cached_property
[docs] def hook(self) -> EmrHook:
return EmrHook(aws_conn_id=self.aws_conn_id)
[docs] def poke(self, context: Context):
response = self.get_emr_response(context=context)
if response["ResponseMetadata"]["HTTPStatusCode"] != 200:
self.log.info("Bad HTTP response: %s", response)
return False
state = self.state_from_response(response)
self.log.info("Job flow currently %s", state)
if state in self.target_states:
return True
if state in self.failed_states:
raise AirflowException(f"EMR job failed: {self.failure_message_from_response(response)}")
return False
[docs] def get_emr_response(self, context: Context) -> dict[str, Any]:
"""
Make an API call with boto3 and get response.
:return: response
"""
raise NotImplementedError("Please implement get_emr_response() in subclass")
@staticmethod
[docs] def state_from_response(response: dict[str, Any]) -> str:
"""
Get state from boto3 response.
:param response: response from AWS API
:return: state
"""
raise NotImplementedError("Please implement state_from_response() in subclass")
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get state from boto3 response.
:param response: response from AWS API
:return: failure message
"""
raise NotImplementedError("Please implement failure_message_from_response() in subclass")
[docs]class EmrServerlessJobSensor(BaseSensorOperator):
"""
Poll the state of the job run until it reaches a terminal state; fails if the job run fails.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrServerlessJobSensor`
:param application_id: application_id to check the state of
:param job_run_id: job_run_id to check the state of
:param target_states: a set of states to wait for, defaults to 'SUCCESS'
:param aws_conn_id: aws connection to use, defaults to 'aws_default'
"""
[docs] template_fields: Sequence[str] = (
"application_id",
"job_run_id",
)
def __init__(
self,
*,
application_id: str,
job_run_id: str,
target_states: set | frozenset = frozenset(EmrServerlessHook.JOB_SUCCESS_STATES),
aws_conn_id: str = "aws_default",
**kwargs: Any,
) -> None:
self.aws_conn_id = aws_conn_id
self.target_states = target_states
self.application_id = application_id
self.job_run_id = job_run_id
super().__init__(**kwargs)
[docs] def poke(self, context: Context) -> bool:
response = self.hook.conn.get_job_run(applicationId=self.application_id, jobRunId=self.job_run_id)
state = response["jobRun"]["state"]
if state in EmrServerlessHook.JOB_FAILURE_STATES:
failure_message = f"EMR Serverless job failed: {self.failure_message_from_response(response)}"
raise AirflowException(failure_message)
return state in self.target_states
@cached_property
[docs] def hook(self) -> EmrServerlessHook:
"""Create and return an EmrServerlessHook."""
return EmrServerlessHook(aws_conn_id=self.aws_conn_id)
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get failure message from response dictionary.
:param response: response from AWS API
:return: failure message
"""
return response["jobRun"]["stateDetails"]
[docs]class EmrServerlessApplicationSensor(BaseSensorOperator):
"""
Poll the state of the application until it reaches a terminal state; fails if the application fails.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrServerlessApplicationSensor`
:param application_id: application_id to check the state of
:param target_states: a set of states to wait for, defaults to {'CREATED', 'STARTED'}
:param aws_conn_id: aws connection to use, defaults to 'aws_default'
"""
[docs] template_fields: Sequence[str] = ("application_id",)
def __init__(
self,
*,
application_id: str,
target_states: set | frozenset = frozenset(EmrServerlessHook.APPLICATION_SUCCESS_STATES),
aws_conn_id: str = "aws_default",
**kwargs: Any,
) -> None:
self.aws_conn_id = aws_conn_id
self.target_states = target_states
self.application_id = application_id
super().__init__(**kwargs)
[docs] def poke(self, context: Context) -> bool:
response = self.hook.conn.get_application(applicationId=self.application_id)
state = response["application"]["state"]
if state in EmrServerlessHook.APPLICATION_FAILURE_STATES:
failure_message = f"EMR Serverless job failed: {self.failure_message_from_response(response)}"
raise AirflowException(failure_message)
return state in self.target_states
@cached_property
[docs] def hook(self) -> EmrServerlessHook:
"""Create and return an EmrServerlessHook."""
return EmrServerlessHook(aws_conn_id=self.aws_conn_id)
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get failure message from response dictionary.
:param response: response from AWS API
:return: failure message
"""
return response["application"]["stateDetails"]
[docs]class EmrContainerSensor(BaseSensorOperator):
"""
Poll the state of the job run until it reaches a terminal state; fail if the job run fails.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrContainerSensor`
:param job_id: job_id to check the state of
:param max_retries: Number of times to poll for query state before
returning the current state, defaults to None
:param aws_conn_id: aws connection to use, defaults to 'aws_default'
:param poll_interval: Time in seconds to wait between two consecutive call to
check query status on athena, defaults to 10
:param deferrable: Run sensor in the deferrable mode.
"""
[docs] FAILURE_STATES = (
"FAILED",
"CANCELLED",
"CANCEL_PENDING",
)
[docs] SUCCESS_STATES = ("COMPLETED",)
[docs] template_fields: Sequence[str] = ("virtual_cluster_id", "job_id")
[docs] template_ext: Sequence[str] = ()
def __init__(
self,
*,
virtual_cluster_id: str,
job_id: str,
max_retries: int | None = None,
aws_conn_id: str = "aws_default",
poll_interval: int = 10,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
**kwargs: Any,
) -> None:
super().__init__(**kwargs)
self.aws_conn_id = aws_conn_id
self.virtual_cluster_id = virtual_cluster_id
self.job_id = job_id
self.poll_interval = poll_interval
self.max_retries = max_retries
self.deferrable = deferrable
@cached_property
[docs] def hook(self) -> EmrContainerHook:
return EmrContainerHook(self.aws_conn_id, virtual_cluster_id=self.virtual_cluster_id)
[docs] def poke(self, context: Context) -> bool:
state = self.hook.poll_query_status(
self.job_id,
max_polling_attempts=self.max_retries,
poll_interval=self.poll_interval,
)
if state in self.FAILURE_STATES:
raise AirflowException("EMR Containers sensor failed")
if state in self.INTERMEDIATE_STATES:
return False
return True
[docs] def execute(self, context: Context):
if not self.deferrable:
super().execute(context=context)
else:
timeout = (
timedelta(seconds=self.max_retries * self.poll_interval + 60)
if self.max_retries
else self.execution_timeout
)
self.defer(
timeout=timeout,
trigger=EmrContainerTrigger(
virtual_cluster_id=self.virtual_cluster_id,
job_id=self.job_id,
aws_conn_id=self.aws_conn_id,
waiter_delay=self.poll_interval,
),
method_name="execute_complete",
)
[docs] def execute_complete(self, context, event=None):
if event["status"] != "success":
raise AirflowException(f"Error while running job: {event}")
else:
self.log.info(event["message"])
[docs]class EmrNotebookExecutionSensor(EmrBaseSensor):
"""
Poll the EMR notebook until it reaches any of the target states; raise AirflowException on failure.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrNotebookExecutionSensor`
:param notebook_execution_id: Unique id of the notebook execution to be poked.
:target_states: the states the sensor will wait for the execution to reach.
Default target_states is ``FINISHED``.
:failed_states: if the execution reaches any of the failed_states, the sensor will fail.
Default failed_states is ``FAILED``.
"""
[docs] template_fields: Sequence[str] = ("notebook_execution_id",)
[docs] FAILURE_STATES = {"FAILED"}
[docs] COMPLETED_STATES = {"FINISHED"}
def __init__(
self,
notebook_execution_id: str,
target_states: Iterable[str] | None = None,
failed_states: Iterable[str] | None = None,
**kwargs,
):
super().__init__(**kwargs)
self.notebook_execution_id = notebook_execution_id
self.target_states = target_states or self.COMPLETED_STATES
self.failed_states = failed_states or self.FAILURE_STATES
[docs] def get_emr_response(self, context: Context) -> dict[str, Any]:
emr_client = self.hook.conn
self.log.info("Poking notebook %s", self.notebook_execution_id)
return emr_client.describe_notebook_execution(NotebookExecutionId=self.notebook_execution_id)
@staticmethod
[docs] def state_from_response(response: dict[str, Any]) -> str:
"""
Make an API call with boto3 and get cluster-level details.
.. seealso::
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr.html#EMR.Client.describe_cluster
:return: response
"""
return response["NotebookExecution"]["Status"]
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get failure message from response dictionary.
:param response: response from AWS API
:return: failure message
"""
cluster_status = response["NotebookExecution"]
return cluster_status.get("LastStateChangeReason", None)
[docs]class EmrJobFlowSensor(EmrBaseSensor):
"""
Poll the EMR JobFlow Cluster until it reaches any of the target states; raise AirflowException on failure.
With the default target states, sensor waits cluster to be terminated.
When target_states is set to ['RUNNING', 'WAITING'] sensor waits
until job flow to be ready (after 'STARTING' and 'BOOTSTRAPPING' states)
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrJobFlowSensor`
:param job_flow_id: job_flow_id to check the state of
:param target_states: the target states, sensor waits until
job flow reaches any of these states. In deferrable mode it would
run until reach the terminal state.
:param failed_states: the failure states, sensor fails when
job flow reaches any of these states
:param max_attempts: Maximum number of tries before failing
:param deferrable: Run sensor in the deferrable mode.
"""
[docs] template_fields: Sequence[str] = ("job_flow_id", "target_states", "failed_states")
[docs] template_ext: Sequence[str] = ()
def __init__(
self,
*,
job_flow_id: str,
target_states: Iterable[str] | None = None,
failed_states: Iterable[str] | None = None,
max_attempts: int = 60,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
**kwargs,
):
super().__init__(**kwargs)
self.job_flow_id = job_flow_id
self.target_states = target_states or ["TERMINATED"]
self.failed_states = failed_states or ["TERMINATED_WITH_ERRORS"]
self.max_attempts = max_attempts
self.deferrable = deferrable
[docs] def get_emr_response(self, context: Context) -> dict[str, Any]:
"""
Make an API call with boto3 and get cluster-level details.
.. seealso::
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr.html#EMR.Client.describe_cluster
:return: response
"""
emr_client = self.hook.conn
self.log.info("Poking cluster %s", self.job_flow_id)
response = emr_client.describe_cluster(ClusterId=self.job_flow_id)
EmrClusterLink.persist(
context=context,
operator=self,
region_name=self.hook.conn_region_name,
aws_partition=self.hook.conn_partition,
job_flow_id=self.job_flow_id,
)
EmrLogsLink.persist(
context=context,
operator=self,
region_name=self.hook.conn_region_name,
aws_partition=self.hook.conn_partition,
job_flow_id=self.job_flow_id,
log_uri=get_log_uri(cluster=response),
)
return response
@staticmethod
[docs] def state_from_response(response: dict[str, Any]) -> str:
"""
Get state from response dictionary.
:param response: response from AWS API
:return: current state of the cluster
"""
return response["Cluster"]["Status"]["State"]
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get failure message from response dictionary.
:param response: response from AWS API
:return: failure message
"""
cluster_status = response["Cluster"]["Status"]
state_change_reason = cluster_status.get("StateChangeReason")
if state_change_reason:
return (
f"for code: {state_change_reason.get('Code', 'No code')} "
f"with message {state_change_reason.get('Message', 'Unknown')}"
)
return None
[docs] def execute(self, context: Context) -> None:
if not self.deferrable:
super().execute(context=context)
elif not self.poke(context):
self.defer(
timeout=timedelta(seconds=self.poke_interval * self.max_attempts),
trigger=EmrTerminateJobFlowTrigger(
job_flow_id=self.job_flow_id,
waiter_max_attempts=self.max_attempts,
aws_conn_id=self.aws_conn_id,
waiter_delay=int(self.poke_interval),
),
method_name="execute_complete",
)
[docs] def execute_complete(self, context, event=None):
if event["status"] != "success":
raise AirflowException(f"Error while running job: {event}")
self.log.info("Job completed.")
[docs]class EmrStepSensor(EmrBaseSensor):
"""
Poll the state of the step until it reaches any of the target states; raise AirflowException on failure.
With the default target states, sensor waits step to be completed.
.. seealso::
For more information on how to use this sensor, take a look at the guide:
:ref:`howto/sensor:EmrStepSensor`
:param job_flow_id: job_flow_id which contains the step check the state of
:param step_id: step to check the state of
:param target_states: the target states, sensor waits until
step reaches any of these states. In case of deferrable sensor it will
for reach to terminal state
:param failed_states: the failure states, sensor fails when
step reaches any of these states
:param max_attempts: Maximum number of tries before failing
:param deferrable: Run sensor in the deferrable mode.
"""
[docs] template_fields: Sequence[str] = ("job_flow_id", "step_id", "target_states", "failed_states")
[docs] template_ext: Sequence[str] = ()
def __init__(
self,
*,
job_flow_id: str,
step_id: str,
target_states: Iterable[str] | None = None,
failed_states: Iterable[str] | None = None,
max_attempts: int = 60,
deferrable: bool = conf.getboolean("operators", "default_deferrable", fallback=False),
**kwargs,
):
super().__init__(**kwargs)
self.job_flow_id = job_flow_id
self.step_id = step_id
self.target_states = target_states or ["COMPLETED"]
self.failed_states = failed_states or ["CANCELLED", "FAILED", "INTERRUPTED"]
self.max_attempts = max_attempts
self.deferrable = deferrable
[docs] def get_emr_response(self, context: Context) -> dict[str, Any]:
"""
Make an API call with boto3 and get details about the cluster step.
.. seealso::
https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/emr.html#EMR.Client.describe_step
:return: response
"""
emr_client = self.hook.conn
self.log.info("Poking step %s on cluster %s", self.step_id, self.job_flow_id)
response = emr_client.describe_step(ClusterId=self.job_flow_id, StepId=self.step_id)
EmrClusterLink.persist(
context=context,
operator=self,
region_name=self.hook.conn_region_name,
aws_partition=self.hook.conn_partition,
job_flow_id=self.job_flow_id,
)
EmrLogsLink.persist(
context=context,
operator=self,
region_name=self.hook.conn_region_name,
aws_partition=self.hook.conn_partition,
job_flow_id=self.job_flow_id,
log_uri=get_log_uri(emr_client=emr_client, job_flow_id=self.job_flow_id),
)
return response
@staticmethod
[docs] def state_from_response(response: dict[str, Any]) -> str:
"""
Get state from response dictionary.
:param response: response from AWS API
:return: execution state of the cluster step
"""
return response["Step"]["Status"]["State"]
@staticmethod
[docs] def failure_message_from_response(response: dict[str, Any]) -> str | None:
"""
Get failure message from response dictionary.
:param response: response from AWS API
:return: failure message
"""
fail_details = response["Step"]["Status"].get("FailureDetails")
if fail_details:
return (
f"for reason {fail_details.get('Reason')} "
f"with message {fail_details.get('Message')} and log file {fail_details.get('LogFile')}"
)
return None
[docs] def execute(self, context: Context) -> None:
if not self.deferrable:
super().execute(context=context)
elif not self.poke(context):
self.defer(
timeout=timedelta(seconds=self.max_attempts * self.poke_interval),
trigger=EmrStepSensorTrigger(
job_flow_id=self.job_flow_id,
step_id=self.step_id,
waiter_delay=int(self.poke_interval),
waiter_max_attempts=self.max_attempts,
aws_conn_id=self.aws_conn_id,
),
method_name="execute_complete",
)
[docs] def execute_complete(self, context, event=None):
if event["status"] != "success":
raise AirflowException(f"Error while running job: {event}")
self.log.info("Job completed.")
