Source code for airflow.providers.amazon.aws.example_dags.example_sqs

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from datetime import datetime
from os import getenv

from airflow import DAG
from airflow.decorators import task
from airflow.models.baseoperator import chain
from airflow.providers.amazon.aws.hooks.sqs import SqsHook
from airflow.providers.amazon.aws.operators.sqs import SqsPublishOperator
from airflow.providers.amazon.aws.sensors.sqs import SqsSensor

[docs]QUEUE_NAME = getenv('QUEUE_NAME', 'Airflow-Example-Queue')


@task(task_id="create_queue")
[docs]def create_queue_fn():
    """Create the example queue"""
    hook = SqsHook()
    result = hook.create_queue(queue_name=QUEUE_NAME)
    return result['QueueUrl']


@task(task_id="delete_queue")
[docs]def delete_queue_fn(queue_url):
    """Delete the example queue"""
    hook = SqsHook()
    hook.get_conn().delete_queue(QueueUrl=queue_url)


with DAG(
    dag_id='example_sqs',
    schedule_interval=None,
    start_date=datetime(2021, 1, 1),
    tags=['example'],
    catchup=False,
) as dag:

[docs]    create_queue = create_queue_fn()

    # [START howto_operator_sqs]
    publish_to_queue = SqsPublishOperator(
        task_id='publish_to_queue',
        sqs_queue=create_queue,
        message_content="{{ task_instance }}-{{ execution_date }}",
    )
    # [END howto_operator_sqs]

    # [START howto_sensor_sqs]
    read_from_queue = SqsSensor(
        task_id='read_from_queue',
        sqs_queue=create_queue,
    )
    # [END howto_sensor_sqs]

    delete_queue = delete_queue_fn(create_queue)

    chain(create_queue, publish_to_queue, read_from_queue, delete_queue)