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Copy pathjava_examples.py
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108 lines (71 loc) · 2.43 KB
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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
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.stub(queue="java")
def concurrent(): ...
@task.stub(queue="java")
def produce_number(): ...
@task.stub(queue="java")
def widen_to_long(): ...
@task.stub(queue="java")
def widen_to_double(): ...
@task.stub(queue="java")
def produce_nothing(): ...
@task.stub(queue="java")
def consume_nullable(): ...
@task.stub(queue="java")
def produce_fraction(): ...
@task.stub(queue="java")
def consume_float(): ...
@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()
concurrent()
@dag(dag_id="java_xcom_casting_example")
def java_xcom_casting_example():
produce_number() >> widen_to_long() >> widen_to_double()
produce_nothing() >> consume_nullable()
produce_fraction() >> consume_float()
java_interface_example()
java_annotation_example()
java_xcom_casting_example()