1 // ======================================================================== 2 // Copyright (c) 2004-2009 Mort Bay Consulting Pty. Ltd. 3 // ------------------------------------------------------------------------ 4 // All rights reserved. This program and the accompanying materials 5 // are made available under the terms of the Eclipse Public License v1.0 6 // and Apache License v2.0 which accompanies this distribution. 7 // The Eclipse Public License is available at 8 // http://www.eclipse.org/legal/epl-v10.html 9 // The Apache License v2.0 is available at 10 // http://www.opensource.org/licenses/apache2.0.php 11 // You may elect to redistribute this code under either of these licenses. 12 // ======================================================================== 13 14 package org.eclipse.jetty.util.thread; 15 16 import org.eclipse.jetty.util.component.LifeCycle; 17 18 /* ------------------------------------------------------------ */ 19 /** ThreadPool. 20 * 21 * 22 */ 23 public interface ThreadPool 24 { 25 /* ------------------------------------------------------------ */ 26 public abstract boolean dispatch(Runnable job); 27 28 /* ------------------------------------------------------------ */ 29 /** 30 * Blocks until the thread pool is {@link LifeCycle#stop stopped}. 31 */ 32 public void join() throws InterruptedException; 33 34 /* ------------------------------------------------------------ */ 35 /** 36 * @return The total number of threads currently in the pool 37 */ 38 public int getThreads(); 39 40 /* ------------------------------------------------------------ */ 41 /** 42 * @return The number of idle threads in the pool 43 */ 44 public int getIdleThreads(); 45 46 /* ------------------------------------------------------------ */ 47 /** 48 * @return True if the pool is low on threads 49 */ 50 public boolean isLowOnThreads(); 51 52 53 /* ------------------------------------------------------------ */ 54 /* ------------------------------------------------------------ */ 55 public interface SizedThreadPool extends ThreadPool 56 { 57 public int getMinThreads(); 58 public int getMaxThreads(); 59 public void setMinThreads(int threads); 60 public void setMaxThreads(int threads); 61 } 62 }