java-sdk/example/src/resources/dags/java_examples.py

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# to you under the Apache License, Version 2.0 (the
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#
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from __future__ import annotations

from datetime import timedelta

from airflow.sdk import dag, task


@task()
def python_task_1():
    print("python_task_1")
    print("Push Python Task 'python_task_1' XCom:")
    return "value_from_python_task_1"


@task.stub(queue="java")
def extract(): ...


@task.stub(queue="java")
def transform(): ...


@task.stub(queue="java", retries=1, retry_delay=timedelta(seconds=5))
def load(): ...


@task()
def python_task_2(transformed):
    print("python_task_2")
    print("Pull Java Task 'transform' XCom:")
    print(transformed)


@dag(dag_id="java_interface_example")
def java_interface_example():
    transformed = transform()
    python_task_1() >> extract() >> transformed
    python_task_2(transformed)


@dag(dag_id="java_annotation_example")
def java_annotation_example():
    transformed = transform()
    python_task_1() >> extract() >> transformed
    python_task_2(transformed)
    transformed >> load()


java_interface_example()
java_annotation_example()