opendaylight/config/threadpool-config-impl/src/main/java/org/opendaylight/controller/config/threadpool/util/FlexibleThreadPoolWrapper.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.io.IOException;
  13 import java.util.concurrent.ExecutorService;
  14 import java.util.concurrent.Executors;
  15 import java.util.concurrent.SynchronousQueue;
  16 import java.util.concurrent.ThreadFactory;
  17 import java.util.concurrent.ThreadPoolExecutor;
  18 import java.util.concurrent.TimeUnit;
  19
  20 import org.opendaylight.controller.config.threadpool.ThreadPool;
  21
  22 /**
  23  * Implementation of {@link ThreadPool} using flexible number of threads wraps
  24  * {@link ExecutorService}.
  25  */
  26 public class FlexibleThreadPoolWrapper implements ThreadPool, Closeable {
  27     private final ThreadPoolExecutor executor;
  28
  29     public FlexibleThreadPoolWrapper(int minThreadCount, int maxThreadCount, long keepAlive, TimeUnit timeUnit,
  30             ThreadFactory threadFactory) {
  31
  32         executor = new ThreadPoolExecutor(minThreadCount, maxThreadCount, keepAlive, timeUnit,
  33                 new SynchronousQueue<Runnable>(), threadFactory);
  34         executor.prestartAllCoreThreads();
  35     }
  36
  37     @Override
  38     public ExecutorService getExecutor() {
  39         return Executors.unconfigurableExecutorService(executor);
  40     }
  41
  42     public int getMinThreadCount() {
  43         return executor.getCorePoolSize();
  44     }
  45
  46     public void setMinThreadCount(int minThreadCount) {
  47         executor.setCorePoolSize(minThreadCount);
  48     }
  49
  50     @Override
  51     public int getMaxThreadCount() {
  52         return executor.getMaximumPoolSize();
  53     }
  54
  55     public void setMaxThreadCount(int maxThreadCount) {
  56         executor.setMaximumPoolSize(maxThreadCount);
  57     }
  58
  59     public long getKeepAliveMillis() {
  60         return executor.getKeepAliveTime(TimeUnit.MILLISECONDS);
  61     }
  62
  63     public void setKeepAliveMillis(long keepAliveMillis) {
  64         executor.setKeepAliveTime(keepAliveMillis, TimeUnit.MILLISECONDS);
  65     }
  66
  67     public void setThreadFactory(ThreadFactory threadFactory) {
  68         executor.setThreadFactory(threadFactory);
  69     }
  70
  71     public void prestartAllCoreThreads() {
  72         executor.prestartAllCoreThreads();
  73     }
  74
  75     @Override
  76     public void close() throws IOException {
  77         executor.shutdown();
  78     }
  79
  80 }