001    /**
002     * Licensed to the Apache Software Foundation (ASF) under one or more
003     * contributor license agreements.  See the NOTICE file distributed with
004     * this work for additional information regarding copyright ownership.
005     * The ASF licenses this file to You under the Apache License, Version 2.0
006     * (the "License"); you may not use this file except in compliance with
007     * the License.  You may obtain a copy of the License at
008     *
009     *      http://www.apache.org/licenses/LICENSE-2.0
010     *
011     * Unless required by applicable law or agreed to in writing, software
012     * distributed under the License is distributed on an "AS IS" BASIS,
013     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     * See the License for the specific language governing permissions and
015     * limitations under the License.
016     */
017    package org.apache.camel.util.concurrent;
018    
019    import java.util.concurrent.ExecutorService;
020    import java.util.concurrent.Executors;
021    import java.util.concurrent.ScheduledExecutorService;
022    import java.util.concurrent.ThreadFactory;
023    import java.util.concurrent.atomic.AtomicInteger;
024    
025    /**
026     * Helper for {@link java.util.concurrent.ExecutorService} to construct executors using a thread factory that
027     * create thread names with Camel prefix.
028     *
029     * @version $Revision: 777808 $
030     */
031    public final class ExecutorServiceHelper {
032    
033        private static AtomicInteger threadCounter = new AtomicInteger();
034    
035        private ExecutorServiceHelper() {
036        }
037    
038        /**
039         * Creates a new thread name with the given prefix
040         */
041        public static String getThreadName(String name) {
042            return "Camel thread " + nextThreadCounter() + ": " + name;
043        }
044    
045        protected static synchronized int nextThreadCounter() {
046            return threadCounter.getAndIncrement();
047        }
048    
049        public static ScheduledExecutorService newScheduledThreadPool(final int poolSize, final String name, final boolean daemon) {
050            return Executors.newScheduledThreadPool(poolSize, new ThreadFactory() {
051                public Thread newThread(Runnable r) {
052                    Thread answer = new Thread(r, getThreadName(name));
053                    answer.setDaemon(daemon);
054                    return answer;
055                }
056            });
057        }
058    
059        public static ExecutorService newFixedThreadPool(final int poolSize, final String name, final boolean daemon) {
060            return Executors.newFixedThreadPool(poolSize, new ThreadFactory() {
061                public Thread newThread(Runnable r) {
062                    Thread answer = new Thread(r, getThreadName(name));
063                    answer.setDaemon(daemon);
064                    return answer;
065                }
066            });
067        }
068    
069        public static ExecutorService newSingleThreadExecutor(final String name, final boolean daemon) {
070            return Executors.newSingleThreadExecutor(new ThreadFactory() {
071                public Thread newThread(Runnable r) {
072                    Thread answer = new Thread(r, getThreadName(name));
073                    answer.setDaemon(daemon);
074                    return answer;
075                }
076            });
077        }
078    
079    }