| // |
| // ======================================================================== |
| // Copyright (c) 1995-2017 Mort Bay Consulting Pty. Ltd. |
| // ------------------------------------------------------------------------ |
| // All rights reserved. This program and the accompanying materials |
| // are made available under the terms of the Eclipse Public License v1.0 |
| // and Apache License v2.0 which accompanies this distribution. |
| // |
| // The Eclipse Public License is available at |
| // http://www.eclipse.org/legal/epl-v10.html |
| // |
| // The Apache License v2.0 is available at |
| // http://www.opensource.org/licenses/apache2.0.php |
| // |
| // You may elect to redistribute this code under either of these licenses. |
| // ======================================================================== |
| // |
| |
| package org.eclipse.jetty.http.spi; |
| |
| import java.util.concurrent.Executor; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.RejectedExecutionException; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.eclipse.jetty.util.component.ContainerLifeCycle; |
| import org.eclipse.jetty.util.component.LifeCycle; |
| import org.eclipse.jetty.util.log.Log; |
| import org.eclipse.jetty.util.log.Logger; |
| import org.eclipse.jetty.util.thread.ThreadPool; |
| |
| public class DelegatingThreadPool extends ContainerLifeCycle implements ThreadPool |
| { |
| private static final Logger LOG = Log.getLogger(DelegatingThreadPool.class); |
| |
| private Executor _executor; // memory barrier provided by start/stop semantics |
| |
| public DelegatingThreadPool(Executor executor) |
| { |
| _executor=executor; |
| addBean(_executor); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public Executor getExecutor() |
| { |
| return _executor; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| public void setExecutor(Executor executor) |
| { |
| if (isRunning()) |
| throw new IllegalStateException(getState()); |
| updateBean(_executor,executor); |
| _executor=executor; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void execute(Runnable job) |
| { |
| _executor.execute(job); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public int getIdleThreads() |
| { |
| final Executor executor=_executor; |
| if (executor instanceof ThreadPool) |
| return ((ThreadPool)executor).getIdleThreads(); |
| |
| if (executor instanceof ThreadPoolExecutor) |
| { |
| final ThreadPoolExecutor tpe = (ThreadPoolExecutor)executor; |
| return tpe.getPoolSize() - tpe.getActiveCount(); |
| } |
| return -1; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public int getThreads() |
| { |
| final Executor executor=_executor; |
| if (executor instanceof ThreadPool) |
| return ((ThreadPool)executor).getThreads(); |
| |
| if (executor instanceof ThreadPoolExecutor) |
| { |
| final ThreadPoolExecutor tpe = (ThreadPoolExecutor)executor; |
| return tpe.getPoolSize(); |
| } |
| return -1; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public boolean isLowOnThreads() |
| { |
| final Executor executor=_executor; |
| if (executor instanceof ThreadPool) |
| return ((ThreadPool)executor).isLowOnThreads(); |
| |
| if (executor instanceof ThreadPoolExecutor) |
| { |
| final ThreadPoolExecutor tpe = (ThreadPoolExecutor)executor; |
| // getActiveCount() locks the thread pool, so execute it last |
| return tpe.getPoolSize() == tpe.getMaximumPoolSize() && |
| tpe.getQueue().size() >= tpe.getPoolSize() - tpe.getActiveCount(); |
| } |
| return false; |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| public void join() throws InterruptedException |
| { |
| final Executor executor=_executor; |
| if (executor instanceof ThreadPool) |
| ((ThreadPool)executor).join(); |
| else if (executor instanceof ExecutorService) |
| ((ExecutorService)executor).awaitTermination(Long.MAX_VALUE, TimeUnit.MILLISECONDS); |
| else |
| throw new IllegalStateException(); |
| } |
| |
| /* ------------------------------------------------------------ */ |
| @Override |
| protected void doStop() throws Exception |
| { |
| super.doStop(); |
| if (!(_executor instanceof LifeCycle) && (_executor instanceof ExecutorService)) |
| ((ExecutorService)_executor).shutdownNow(); |
| } |
| |
| } |