001/*
002 * ====================================================================
003 * Licensed to the Apache Software Foundation (ASF) under one
004 * or more contributor license agreements.  See the NOTICE file
005 * distributed with this work for additional information
006 * regarding copyright ownership.  The ASF licenses this file
007 * to you under the Apache License, Version 2.0 (the
008 * "License"); you may not use this file except in compliance
009 * with the License.  You may obtain a copy of the License at
010 *
011 *   http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing,
014 * software distributed under the License is distributed on an
015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
016 * KIND, either express or implied.  See the License for the
017 * specific language governing permissions and limitations
018 * under the License.
019 * ====================================================================
020 *
021 * This software consists of voluntary contributions made by many
022 * individuals on behalf of the Apache Software Foundation.  For more
023 * information on the Apache Software Foundation, please see
024 * <http://www.apache.org/>.
025 *
026 */
027package org.apache.http.impl.bootstrap;
028
029import java.util.HashSet;
030import java.util.Map;
031import java.util.Set;
032import java.util.concurrent.BlockingQueue;
033import java.util.concurrent.ConcurrentHashMap;
034import java.util.concurrent.ThreadFactory;
035import java.util.concurrent.ThreadPoolExecutor;
036import java.util.concurrent.TimeUnit;
037
038/**
039 * @since 4.4
040 */
041class WorkerPoolExecutor extends ThreadPoolExecutor {
042
043    private final Map<Worker, Boolean> workerSet;
044
045    public WorkerPoolExecutor(
046            final int corePoolSize,
047            final int maximumPoolSize,
048            final long keepAliveTime,
049            final TimeUnit unit,
050            final BlockingQueue<Runnable> workQueue,
051            final ThreadFactory threadFactory) {
052        super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory);
053        this.workerSet = new ConcurrentHashMap<Worker, Boolean>();
054    }
055
056    @Override
057    protected void beforeExecute(final Thread t, final Runnable r) {
058        if (r instanceof Worker) {
059            this.workerSet.put((Worker) r, Boolean.TRUE);
060        }
061    }
062
063    @Override
064    protected void afterExecute(final Runnable r, final Throwable t) {
065        if (r instanceof Worker) {
066            this.workerSet.remove(r);
067        }
068    }
069
070    public Set<Worker> getWorkers() {
071        return new HashSet<Worker>(this.workerSet.keySet());
072    }
073
074}