opendaylight/config/threadpool-config-impl/src/main/java/org/opendaylight/controller/config/threadpool/util/FixedThreadPoolWrapper.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8
   9 package org.opendaylight.controller.config.threadpool.util;
  10
  11 import java.io.Closeable;
  12 import java.util.concurrent.ExecutorService;
  13 import java.util.concurrent.Executors;
  14 import java.util.concurrent.ThreadFactory;
  15 import java.util.concurrent.ThreadPoolExecutor;
  16 import org.opendaylight.controller.config.threadpool.ThreadPool;
  17
  18 /**
  19  * Implementation of {@link ThreadPool} using fixed number of threads wraps
  20  * {@link ExecutorService}.
  21  */
  22 public class FixedThreadPoolWrapper implements ThreadPool, Closeable {
  23
  24     private final ThreadPoolExecutor executor;
  25
  26     public FixedThreadPoolWrapper(int threadCount, ThreadFactory factory) {
  27         this.executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(threadCount, factory);
  28         executor.prestartAllCoreThreads();
  29     }
  30
  31     @Override
  32     public ExecutorService getExecutor() {
  33         return Executors.unconfigurableExecutorService(executor);
  34     }
  35
  36     @Override
  37     public void close() {
  38         executor.shutdown();
  39     }
  40
  41     @Override
  42     public int getMaxThreadCount() {
  43         return executor.getMaximumPoolSize();
  44     }
  45
  46     public void setMaxThreadCount(int maxThreadCount) {
  47         executor.setCorePoolSize(maxThreadCount);
  48         executor.setMaximumPoolSize(maxThreadCount);
  49     }
  50 }