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
  17 import org.opendaylight.controller.config.threadpool.ThreadPool;
  18
  19 /**
  20  * Implementation of {@link ThreadPool} using fixed number of threads wraps
  21  * {@link ExecutorService}.
  22  */
  23 public class FixedThreadPoolWrapper implements ThreadPool, Closeable {
  24
  25     private final ThreadPoolExecutor executor;
  26
  27     public FixedThreadPoolWrapper(int threadCount, ThreadFactory factory) {
  28         this.executor = (ThreadPoolExecutor) Executors.newFixedThreadPool(threadCount, factory);
  29         executor.prestartAllCoreThreads();
  30     }
  31
  32     @Override
  33     public ExecutorService getExecutor() {
  34         return Executors.unconfigurableExecutorService(executor);
  35     }
  36
  37     @Override
  38     public void close() {
  39         executor.shutdown();
  40     }
  41
  42     @Override
  43     public int getMaxThreadCount() {
  44         return executor.getMaximumPoolSize();
  45     }
  46
  47     public void setMaxThreadCount(int maxThreadCount) {
  48         executor.setCorePoolSize(maxThreadCount);
  49         executor.setMaximumPoolSize(maxThreadCount);
  50     }
  51 }