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from typing import Dict, Optional, Sequence, Tuple, Union
from google.api_core.gapic_v1.method import DEFAULT, _MethodDefault
from google.api_core.operation import Operation
from google.api_core.retry import Retry
from google.cloud.workflows.executions_v1beta import Execution, ExecutionsClient
from google.cloud.workflows.executions_v1beta.services.executions.pagers import ListExecutionsPager
from google.cloud.workflows_v1beta import Workflow, WorkflowsClient
from google.cloud.workflows_v1beta.services.workflows.pagers import ListWorkflowsPager
from google.protobuf.field_mask_pb2 import FieldMask
from airflow.providers.google.common.consts import CLIENT_INFO
from airflow.providers.google.common.hooks.base_google import PROVIDE_PROJECT_ID, GoogleBaseHook
[docs]class WorkflowsHook(GoogleBaseHook):
"""
Hook for Google GCP APIs.
All the methods in the hook where project_id is used must be called with
keyword arguments rather than positional.
"""
[docs] def get_workflows_client(self) -> WorkflowsClient:
"""Returns WorkflowsClient."""
return WorkflowsClient(credentials=self._get_credentials(), client_info=CLIENT_INFO)
[docs] def get_executions_client(self) -> ExecutionsClient:
"""Returns ExecutionsClient."""
return ExecutionsClient(credentials=self._get_credentials(), client_info=CLIENT_INFO)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def create_workflow(
self,
workflow: Dict,
workflow_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Operation:
"""
Creates a new workflow. If a workflow with the specified name
already exists in the specified project and location, the long
running operation will return
[ALREADY_EXISTS][google.rpc.Code.ALREADY_EXISTS] error.
:param workflow: Required. Workflow to be created.
:param workflow_id: Required. The ID of the workflow to be created.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_workflows_client()
parent = f"projects/{project_id}/locations/{location}"
return client.create_workflow(
request={"parent": parent, "workflow": workflow, "workflow_id": workflow_id},
retry=retry,
timeout=timeout,
metadata=metadata,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_workflow(
self,
workflow_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Workflow:
"""
Gets details of a single Workflow.
:param workflow_id: Required. The ID of the workflow to be created.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_workflows_client()
name = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}"
return client.get_workflow(request={"name": name}, retry=retry, timeout=timeout, metadata=metadata)
[docs] def update_workflow(
self,
workflow: Union[Dict, Workflow],
update_mask: Optional[FieldMask] = None,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Operation:
"""
Updates an existing workflow.
Running this method has no impact on already running
executions of the workflow. A new revision of the
workflow may be created as a result of a successful
update operation. In that case, such revision will be
used in new workflow executions.
:param workflow: Required. Workflow to be created.
:param update_mask: List of fields to be updated. If not present,
the entire workflow will be updated.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_workflows_client()
return client.update_workflow(
request={"workflow": workflow, "update_mask": update_mask},
retry=retry,
timeout=timeout,
metadata=metadata,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def delete_workflow(
self,
workflow_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Operation:
"""
Deletes a workflow with the specified name.
This method also cancels and deletes all running
executions of the workflow.
:param workflow_id: Required. The ID of the workflow to be created.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_workflows_client()
name = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}"
return client.delete_workflow(request={"name": name}, retry=retry, timeout=timeout, metadata=metadata)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def list_workflows(
self,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
filter_: Optional[str] = None,
order_by: Optional[str] = None,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> ListWorkflowsPager:
"""
Lists Workflows in a given project and location.
The default order is not specified.
:param filter_: Filter to restrict results to specific workflows.
:param order_by: Comma-separated list of fields that
specifies the order of the results. Default sorting order for a field is ascending.
To specify descending order for a field, append a "desc" suffix.
If not specified, the results will be returned in an unspecified order.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_workflows_client()
parent = f"projects/{project_id}/locations/{location}"
return client.list_workflows(
request={"parent": parent, "filter": filter_, "order_by": order_by},
retry=retry,
timeout=timeout,
metadata=metadata,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def create_execution(
self,
workflow_id: str,
location: str,
execution: Dict,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Execution:
"""
Creates a new execution using the latest revision of
the given workflow.
:param execution: Required. Input parameters of the execution represented as a dictionary.
:param workflow_id: Required. The ID of the workflow.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_executions_client()
parent = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}"
return client.create_execution(
request={"parent": parent, "execution": execution},
retry=retry,
timeout=timeout,
metadata=metadata,
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def get_execution(
self,
workflow_id: str,
execution_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Execution:
"""
Returns an execution for the given ``workflow_id`` and ``execution_id``.
:param workflow_id: Required. The ID of the workflow.
:param execution_id: Required. The ID of the execution.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_executions_client()
name = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}/executions/{execution_id}"
return client.get_execution(request={"name": name}, retry=retry, timeout=timeout, metadata=metadata)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def cancel_execution(
self,
workflow_id: str,
execution_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> Execution:
"""
Cancels an execution using the given ``workflow_id`` and ``execution_id``.
:param workflow_id: Required. The ID of the workflow.
:param execution_id: Required. The ID of the execution.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_executions_client()
name = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}/executions/{execution_id}"
return client.cancel_execution(
request={"name": name}, retry=retry, timeout=timeout, metadata=metadata
)
@GoogleBaseHook.fallback_to_default_project_id
[docs] def list_executions(
self,
workflow_id: str,
location: str,
project_id: str = PROVIDE_PROJECT_ID,
retry: Union[Retry, _MethodDefault] = DEFAULT,
timeout: Optional[float] = None,
metadata: Sequence[Tuple[str, str]] = (),
) -> ListExecutionsPager:
"""
Returns a list of executions which belong to the
workflow with the given name. The method returns
executions of all workflow revisions. Returned
executions are ordered by their start time (newest
first).
:param workflow_id: Required. The ID of the workflow to be created.
:param project_id: Required. The ID of the Google Cloud project the cluster belongs to.
:param location: Required. The GCP region in which to handle the request.
:param retry: A retry object used to retry requests. If ``None`` is specified, requests will not be
retried.
:param timeout: The amount of time, in seconds, to wait for the request to complete. Note that if
``retry`` is specified, the timeout applies to each individual attempt.
:param metadata: Additional metadata that is provided to the method.
"""
metadata = metadata or ()
client = self.get_executions_client()
parent = f"projects/{project_id}/locations/{location}/workflows/{workflow_id}"
return client.list_executions(
request={"parent": parent}, retry=retry, timeout=timeout, metadata=metadata
)