| /******************************************************************************* |
| * 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.ofbiz.base.concurrent; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.DelayQueue; |
| import java.util.concurrent.Delayed; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.ScheduledExecutorService; |
| import java.util.concurrent.ScheduledThreadPoolExecutor; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.TimeUnit; |
| |
| import javolution.util.FastList; |
| |
| import org.ofbiz.base.lang.SourceMonitored; |
| import org.ofbiz.base.util.Debug; |
| |
| @SourceMonitored |
| public final class ExecutionPool { |
| public static final String module = ExecutionPool.class.getName(); |
| public static final ScheduledExecutorService GLOBAL_EXECUTOR = getExecutor(null, "OFBiz-config", -1, false); |
| |
| protected static class ExecutionPoolThreadFactory implements ThreadFactory { |
| private final ThreadGroup group; |
| private final String namePrefix; |
| private int count = 0; |
| |
| protected ExecutionPoolThreadFactory(ThreadGroup group, String namePrefix) { |
| this.group = group; |
| this.namePrefix = namePrefix; |
| } |
| |
| public Thread newThread(Runnable r) { |
| Thread t = new Thread(group, r); |
| t.setDaemon(true); |
| t.setPriority(Thread.NORM_PRIORITY); |
| t.setName(namePrefix + "-" + count++); |
| return t; |
| } |
| } |
| |
| public static ThreadFactory createThreadFactory(ThreadGroup group, String namePrefix) { |
| return new ExecutionPoolThreadFactory(group, namePrefix); |
| } |
| |
| public static ScheduledExecutorService getExecutor(ThreadGroup group, String namePrefix, int threadCount, boolean preStart) { |
| if (threadCount == 0) { |
| threadCount = 1; |
| } else if (threadCount < 0) { |
| int numCpus = Runtime.getRuntime().availableProcessors(); |
| threadCount = Math.abs(threadCount) * numCpus; |
| } |
| ThreadFactory threadFactory = createThreadFactory(group, namePrefix); |
| ScheduledThreadPoolExecutor executor = new ScheduledThreadPoolExecutor(threadCount, threadFactory); |
| if (preStart) { |
| executor.prestartAllCoreThreads(); |
| } |
| return executor; |
| } |
| |
| public static <F> List<F> getAllFutures(Collection<Future<F>> futureList) { |
| List<F> result = FastList.newInstance(); |
| for (Future<F> future: futureList) { |
| try { |
| result.add(future.get()); |
| } catch (ExecutionException e) { |
| Debug.logError(e, module); |
| } catch (InterruptedException e) { |
| Debug.logError(e, module); |
| } |
| } |
| return result; |
| } |
| |
| public static void addPulse(Pulse pulse) { |
| delayQueue.put(pulse); |
| } |
| |
| public static void removePulse(Pulse pulse) { |
| delayQueue.remove(pulse); |
| } |
| |
| public static void pulseAll(Class<? extends Pulse> match) { |
| Iterator<Pulse> it = delayQueue.iterator(); |
| while (it.hasNext()) { |
| Pulse pulse = it.next(); |
| if (match.isInstance(pulse)) { |
| it.remove(); |
| pulse.run(); |
| } |
| } |
| } |
| |
| static { |
| ExecutionPoolPulseWorker worker = new ExecutionPoolPulseWorker(); |
| int processorCount = Runtime.getRuntime().availableProcessors(); |
| for (int i = 0; i < processorCount; i++) { |
| Thread t = new Thread(worker); |
| t.setDaemon(true); |
| t.setName("OFBiz-ExecutionPoolPulseWorker-" + i); |
| t.start(); |
| } |
| } |
| |
| private static final DelayQueue<Pulse> delayQueue = new DelayQueue<Pulse>(); |
| |
| public static class ExecutionPoolPulseWorker implements Runnable { |
| public void run() { |
| try { |
| while (true) { |
| delayQueue.take().run(); |
| } |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| |
| public static abstract class Pulse implements Delayed, Runnable { |
| protected final long expireTimeNanos; |
| protected final long loadTimeNanos; |
| |
| protected Pulse(long delayNanos) { |
| this(System.nanoTime(), delayNanos); |
| } |
| |
| protected Pulse(long loadTimeNanos, long delayNanos) { |
| this.loadTimeNanos = loadTimeNanos; |
| expireTimeNanos = loadTimeNanos + delayNanos; |
| } |
| |
| public long getLoadTimeNanos() { |
| return loadTimeNanos; |
| } |
| |
| public long getExpireTimeNanos() { |
| return expireTimeNanos; |
| } |
| |
| public final long getDelay(TimeUnit unit) { |
| return unit.convert(expireTimeNanos - System.nanoTime(), TimeUnit.NANOSECONDS); |
| } |
| |
| public final int compareTo(Delayed other) { |
| long r = (expireTimeNanos - ((Pulse) other).expireTimeNanos); |
| if (r < 0) return -1; |
| if (r > 0) return 1; |
| return 0; |
| } |
| } |
| |
| } |