/*
* 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.
*/
package org.apache.beam.runners.flink;
import org.apache.beam.sdk.options.DefaultValueFactory;
import org.apache.beam.sdk.options.PipelineOptions;
import org.apache.flink.configuration.ConfigConstants;
import org.apache.flink.configuration.GlobalConfiguration;
/**
* {@link DefaultValueFactory} for getting a default value for the parallelism option
* on {@link FlinkPipelineOptions}.
*
* <p>This will return either the default value from {@link GlobalConfiguration} or {@code 1}.
* A valid {@link GlobalConfiguration} is only available if the program is executed by the Flink
* run scripts.
*/
public class DefaultParallelismFactory implements DefaultValueFactory<Integer> {
@Override
public Integer create(PipelineOptions options) {
return GlobalConfiguration.loadConfiguration()
.getInteger(ConfigConstants.DEFAULT_PARALLELISM_KEY, 1);
}
}