Google Cloud Tasks¶

Cloud Tasks is a fully managed service that allows you to manage the execution, dispatch, and delivery of a large number of distributed tasks. Using Cloud Tasks, you can perform work asynchronously outside of a user or service-to-service request.

For more information about the service visit Cloud Tasks product documentation

Prerequisite Tasks¶

To use these operators, you must do a few things:

Select or create a Cloud Platform project using the Cloud Console.

Enable billing for your project, as described in the Google Cloud documentation.

Enable the API, as described in the Cloud Console documentation.
Install API libraries via pip.
pip install 'apache-airflow[google]'
Detailed information is available for Installation.
Setup a Google Cloud Connection.

Queue operations¶

Create queue¶

To create new Queue use CloudTasksQueueCreateOperator

tests/system/google/cloud/tasks/example_queue.py[source]

create_queue = CloudTasksQueueCreateOperator(
    location=LOCATION,
    task_queue=Queue(stackdriver_logging_config=dict(sampling_ratio=0.5)),
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    retry=Retry(maximum=10.0),
    timeout=5,
    task_id="create_queue",
)

Delete queue¶

To delete Queue use CloudTasksQueueDeleteOperator

tests/system/google/cloud/tasks/example_queue.py[source]

delete_queue = CloudTasksQueueDeleteOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="delete_queue",
)

Resume queue¶

To resume Queue use CloudTasksQueueResumeOperator

tests/system/google/cloud/tasks/example_queue.py[source]

resume_queue = CloudTasksQueueResumeOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="resume_queue",
)

Pause queue¶

To pause Queue use CloudTasksQueuePauseOperator

tests/system/google/cloud/tasks/example_queue.py[source]

pause_queue = CloudTasksQueuePauseOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="pause_queue",
)

Purge queue¶

To purge Queue use CloudTasksQueuePurgeOperator

tests/system/google/cloud/tasks/example_queue.py[source]

purge_queue = CloudTasksQueuePurgeOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="purge_queue",
)

Get queue¶

To get Queue use CloudTasksQueueGetOperator

tests/system/google/cloud/tasks/example_queue.py[source]

get_queue = CloudTasksQueueGetOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="get_queue",
)

get_queue_result = BashOperator(
    task_id="get_queue_result",
    bash_command=f"echo {get_queue.output}",
)

Update queue¶

To update Queue use CloudTasksQueueUpdateOperator

tests/system/google/cloud/tasks/example_queue.py[source]

update_queue = CloudTasksQueueUpdateOperator(
    task_queue=Queue(stackdriver_logging_config=dict(sampling_ratio=1)),
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    update_mask=FieldMask(paths=["stackdriver_logging_config.sampling_ratio"]),
    task_id="update_queue",
)

List queues¶

To list all Queues use CloudTasksQueuesListOperator

tests/system/google/cloud/tasks/example_queue.py[source]

list_queue = CloudTasksQueuesListOperator(location=LOCATION, task_id="list_queue")

Tasks operations¶

Create task¶

To create new Task in a particular queue use CloudTasksTaskCreateOperator

tests/system/google/cloud/tasks/example_tasks.py[source]

create_task = CloudTasksTaskCreateOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task=TASK,
    task_name=TASK_NAME + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    retry=Retry(maximum=10.0),
    timeout=5,
    task_id="create_task_to_run",
)

Get task¶

To get the Tasks in a particular queue use CloudTasksTaskGetOperator

tests/system/google/cloud/tasks/example_tasks.py[source]

tasks_get = CloudTasksTaskGetOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_name=TASK_NAME + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="tasks_get",
)

Run task¶

To run the Task in a particular queue use CloudTasksTaskRunOperator

tests/system/google/cloud/tasks/example_tasks.py[source]

run_task = CloudTasksTaskRunOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_name=TASK_NAME + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    retry=Retry(maximum=10.0),
    task_id="run_task",
)

List tasks¶

To list all Tasks in a particular queue use CloudTasksTasksListOperator

tests/system/google/cloud/tasks/example_tasks.py[source]

list_tasks = CloudTasksTasksListOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task_id="list_tasks",
)

Delete task¶

To delete the Task from particular queue use CloudTasksTaskDeleteOperator

tests/system/google/cloud/tasks/example_tasks.py[source]

create_task = CloudTasksTaskCreateOperator(
    location=LOCATION,
    queue_name=QUEUE_ID + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    task=TASK,
    task_name=TASK_NAME + "{{ task_instance.xcom_pull(task_ids='random_string') }}",
    retry=Retry(maximum=10.0),
    timeout=5,
    task_id="create_task_to_run",
)

References¶

For further information, take a look at:

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