| // Copyright 2016 The Bazel Authors. All rights reserved. |
| // |
| // Licensed 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 com.google.devtools.build.lib.concurrent; |
| |
| import java.util.concurrent.ForkJoinPool; |
| import java.util.concurrent.ForkJoinWorkerThread; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| /** A {@link ForkJoinPool} with support for thread naming. */ |
| public class NamedForkJoinPool extends ForkJoinPool { |
| |
| protected NamedForkJoinPool(String name, int poolSize) { |
| super( |
| poolSize, |
| new NamedForkJoinWorkerThreadFactory(name + "-%s"), |
| /*getUncaughtExceptionHandler=*/ null, |
| /*asyncMode=*/ false); |
| } |
| |
| public static NamedForkJoinPool newNamedPool(String name, int numThreads) { |
| return new NamedForkJoinPool(name, numThreads); |
| } |
| |
| /** A {@link ForkJoinWorkerThread} named on construction. */ |
| private static class NamedForkJoinWorkerThread extends ForkJoinWorkerThread { |
| |
| public NamedForkJoinWorkerThread(ForkJoinPool forkJoinPool, String name) { |
| super(forkJoinPool); |
| this.setName(name); |
| } |
| } |
| |
| /** |
| * A factory for {@link NamedForkJoinWorkerThread}s that names those threads using a |
| * client-provided name format that consumes a thread index. |
| */ |
| private static class NamedForkJoinWorkerThreadFactory implements ForkJoinWorkerThreadFactory { |
| |
| private final String nameFormat; |
| private final AtomicLong nextUnusedThreadIndex = new AtomicLong(0L); |
| |
| NamedForkJoinWorkerThreadFactory(String nameFormat) { |
| this.nameFormat = nameFormat; |
| } |
| |
| @Override |
| public ForkJoinWorkerThread newThread(ForkJoinPool forkJoinPool) { |
| return new NamedForkJoinWorkerThread( |
| forkJoinPool, String.format(nameFormat, nextUnusedThreadIndex.getAndIncrement())); |
| } |
| } |
| } |