/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio.util.executor;
import alluxio.util.ThreadFactoryUtils;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
/**
* Convenience methods for constructing instances of {@link ExecutorServiceFactory}.
*/
public final class ExecutorServiceFactories {
/**
* Returns a {@link ExecutorServiceFactory} which creates threadpool executors with the given base
* name and number of threads. Created threads will be daemonic.
*
* @param name the base name for executor thread names
* @param nThreads the number of threads to create executors with
* @return the {@link ExecutorServiceFactory}
*/
public static ExecutorServiceFactory fixedThreadPoolExecutorServiceFactory(final String name,
final int nThreads) {
return new ExecutorServiceFactory() {
@Override
public ExecutorService create() {
return Executors.newFixedThreadPool(nThreads, ThreadFactoryUtils.build(name + "-%d", true));
}
};
}
/**
* @param executorService the executor service to supply
* @return an {@link ExecutorServiceFactory} which always returns the given
* {@link ExecutorService}
*/
public static ExecutorServiceFactory constantExecutorServiceFactory(
final ExecutorService executorService) {
return new ExecutorServiceFactory() {
@Override
public ExecutorService create() {
return executorService;
}
};
}
private ExecutorServiceFactories() {} // Not intended for instantiation.
}