hadoop CloseableTaskPoolSubmitter 源码
haddop CloseableTaskPoolSubmitter 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/functional/CloseableTaskPoolSubmitter.java
/*
* 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.hadoop.util.functional;
import java.io.Closeable;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import static java.util.Objects.requireNonNull;
/**
* A task submitter which is closeable, and whose close() call
* shuts down the pool. This can help manage
* thread pool lifecycles.
*/
@InterfaceAudience.Public
@InterfaceStability.Unstable
public class CloseableTaskPoolSubmitter implements TaskPool.Submitter,
Closeable {
/** Executors. */
private ExecutorService pool;
/**
* Constructor.
* @param pool non-null executor.
*/
public CloseableTaskPoolSubmitter(final ExecutorService pool) {
this.pool = requireNonNull(pool);
}
/**
* Get the pool.
* @return the pool.
*/
public ExecutorService getPool() {
return pool;
}
/**
* Shut down the pool.
*/
@Override
public void close() {
if (pool != null) {
pool.shutdown();
pool = null;
}
}
@Override
public Future<?> submit(final Runnable task) {
return pool.submit(task);
}
}
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