Source code for tests.system.ibm.mq.example_dag_message_queue_trigger

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from __future__ import annotations

# [START howto_trigger_message_queue]
from airflow.providers.common.messaging.triggers.msg_queue import MessageQueueTrigger
from airflow.sdk import DAG, Asset, AssetWatcher, task

# Define a trigger that listens to an external message queue (IBM MQ in this case)

[docs]
trigger = MessageQueueTrigger(
    queue="ibmmq://mq_default/MY.QUEUE.NAME",
)



[docs]
mq_topic_asset = Asset(
    "mq_topic_asset",
    watchers=[AssetWatcher(name="mq_watcher", trigger=trigger)],
)


with DAG(dag_id="example_ibm_mq_watcher", schedule=[mq_topic_asset]) as dag:

    @task

[docs]
    def process_message(**context):
        for event in context["triggering_asset_events"][mq_topic_asset]:
            # Get the message from the TriggerEvent payload
            print("Processing event: ", event)
            payload = event.extra["payload"]
            print("Actual payload: ", payload)

# [END howto_trigger_message_queue]


from tests_common.test_utils.system_tests import get_test_run  # noqa: E402

# Needed to run the example DAG with pytest (see: tests/system/README.md#run_via_pytest)

[docs]
test_run = get_test_run(dag)