| /* |
| * 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.apache.geode.distributed.internal; |
| |
| import java.util.List; |
| import java.util.concurrent.BlockingQueue; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.RejectedExecutionHandler; |
| import java.util.concurrent.SynchronousQueue; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.geode.SystemFailure; |
| import org.apache.geode.internal.monitoring.ThreadsMonitoring; |
| |
| /** |
| * A ThreadPoolExecutor with stat support. |
| */ |
| public class PooledExecutorWithDMStats extends ThreadPoolExecutor { |
| |
| private final PoolStatHelper poolStatHelper; |
| |
| private final ThreadsMonitoring threadsMonitoring; |
| |
| /** |
| * Used to buffer up tasks that would be have been rejected. Only used (i.e. non-null) if |
| * constructor queue is not a SynchronousQueue. |
| */ |
| private BlockingQueue<Runnable> blockingWorkQueue; |
| |
| /** |
| * Used to consume items off the bufferQueue and put them into the pools synchronous queue. Only |
| * used (i.e. non-null) if constructor queue is not a SynchronousQueue. |
| */ |
| private Thread bufferConsumer; |
| |
| /** |
| * Create a new pool that uses the supplied Channel for queuing, and with all default parameter |
| * settings except for pool size. |
| **/ |
| public PooledExecutorWithDMStats(int poolSize, long keepAliveTime, TimeUnit unit, |
| BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory, PoolStatHelper poolStatHelper, |
| ThreadsMonitoring threadsMonitoring) { |
| this(poolSize, keepAliveTime, unit, getSynchronousQueue(workQueue), threadFactory, |
| newRejectedExecutionHandler(workQueue), poolStatHelper, threadsMonitoring); |
| |
| if (!(workQueue instanceof SynchronousQueue)) { |
| blockingWorkQueue = workQueue; |
| // create a thread that takes from bufferQueue and puts into result |
| final BlockingQueue<Runnable> takeQueue = workQueue; |
| final BlockingQueue<Runnable> putQueue = getQueue(); |
| Runnable r = () -> { |
| try { |
| for (;;) { |
| SystemFailure.checkFailure(); |
| Runnable job = takeQueue.take(); |
| putQueue.put(job); |
| } |
| } catch (InterruptedException ie) { |
| Thread.currentThread().interrupt(); |
| // this thread is being shutdown so just return; |
| } |
| }; |
| bufferConsumer = threadFactory.newThread(r); |
| bufferConsumer.start(); |
| } |
| } |
| |
| /** |
| * Create a new pool |
| */ |
| public PooledExecutorWithDMStats(int poolSize, long keepAliveTime, TimeUnit unit, |
| SynchronousQueue<Runnable> workQueue, ThreadFactory threadFactory, |
| RejectedExecutionHandler rejectedExecutionHandler, PoolStatHelper poolStatHelper, |
| ThreadsMonitoring threadsMonitoring) { |
| super(getCorePoolSize(poolSize), poolSize, keepAliveTime, unit, workQueue, threadFactory, |
| rejectedExecutionHandler); |
| |
| this.poolStatHelper = poolStatHelper; |
| this.threadsMonitoring = threadsMonitoring; |
| } |
| |
| @Override |
| public void shutdown() { |
| try { |
| super.shutdown(); |
| } finally { |
| terminated(); |
| } |
| } |
| |
| @Override |
| protected void terminated() { |
| if (bufferConsumer != null) { |
| bufferConsumer.interrupt(); |
| } |
| super.terminated(); |
| } |
| |
| @Override |
| public List<Runnable> shutdownNow() { |
| terminated(); |
| List<Runnable> l = super.shutdownNow(); |
| if (blockingWorkQueue != null) { |
| blockingWorkQueue.drainTo(l); |
| } |
| return l; |
| } |
| |
| @Override |
| protected void beforeExecute(Thread t, Runnable r) { |
| if (poolStatHelper != null) { |
| poolStatHelper.startJob(); |
| } |
| if (threadsMonitoring != null) { |
| threadsMonitoring.startMonitor(ThreadsMonitoring.Mode.PooledExecutor); |
| } |
| } |
| |
| @Override |
| protected void afterExecute(Runnable r, Throwable ex) { |
| if (poolStatHelper != null) { |
| poolStatHelper.endJob(); |
| } |
| if (threadsMonitoring != null) { |
| threadsMonitoring.endMonitor(); |
| } |
| } |
| |
| private static int getCorePoolSize(int maxSize) { |
| if (maxSize == Integer.MAX_VALUE) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| /** |
| * This handler does a put which will just wait until the queue has room. |
| */ |
| public static class BlockHandler implements RejectedExecutionHandler { |
| @Override |
| public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) { |
| if (executor.isShutdown()) { |
| throw new RejectedExecutionException("executor has been shutdown"); |
| } |
| try { |
| executor.getQueue().put(r); |
| } catch (InterruptedException ie) { |
| Thread.currentThread().interrupt(); |
| throw new RejectedExecutionException("interrupted", ie); |
| } |
| } |
| } |
| /** |
| * This handler fronts a synchronous queue, that is owned by the parent ThreadPoolExecutor, with a |
| * the |
| * client supplied BlockingQueue that supports storage (the buffer queue). A dedicated thread is |
| * used to consume off the buffer queue and put into the synchronous queue. |
| */ |
| public static class BufferHandler implements RejectedExecutionHandler { |
| @Override |
| public void rejectedExecution(Runnable r, ThreadPoolExecutor executor) { |
| if (executor.isShutdown()) { |
| throw new RejectedExecutionException("executor has been shutdown"); |
| } |
| try { |
| PooledExecutorWithDMStats pool = (PooledExecutorWithDMStats) executor; |
| pool.blockingWorkQueue.put(r); |
| } catch (InterruptedException ie) { |
| Thread.currentThread().interrupt(); |
| throw new RejectedExecutionException("interrupted", ie); |
| } |
| } |
| } |
| |
| private static SynchronousQueue<Runnable> getSynchronousQueue(BlockingQueue<Runnable> q) { |
| if (q instanceof SynchronousQueue) { |
| return (SynchronousQueue<Runnable>) q; |
| } |
| return new SynchronousQueue<>(); |
| } |
| |
| private static RejectedExecutionHandler newRejectedExecutionHandler(BlockingQueue<Runnable> q) { |
| if (q instanceof SynchronousQueue) { |
| return new CallerRunsPolicy(); |
| } |
| // create a thread that takes from bufferQueue and puts into result |
| return new BufferHandler(); |
| } |
| } |