1 //======================================================================== 2 //$Id: ThreadPool.java,v 1.4 2005/11/20 11:30:38 gregwilkins Exp $ 3 //Copyright 2004-2005 Mort Bay Consulting Pty. Ltd. 4 //------------------------------------------------------------------------ 5 //Licensed under the Apache License, Version 2.0 (the "License"); 6 //you may not use this file except in compliance with the License. 7 //You may obtain a copy of the License at 8 //http://www.apache.org/licenses/LICENSE-2.0 9 //Unless required by applicable law or agreed to in writing, software 10 //distributed under the License is distributed on an "AS IS" BASIS, 11 //WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 //See the License for the specific language governing permissions and 13 //limitations under the License. 14 //======================================================================== 15 16 package org.mortbay.thread; 17 18 import org.mortbay.component.LifeCycle; 19 20 /* ------------------------------------------------------------ */ 21 /** ThreadPool. 22 * @author gregw 23 * 24 */ 25 public interface ThreadPool 26 { 27 /* ------------------------------------------------------------ */ 28 public abstract boolean dispatch(Runnable job); 29 30 /* ------------------------------------------------------------ */ 31 /** 32 * Blocks until the thread pool is {@link LifeCycle#stop stopped}. 33 */ 34 public void join() throws InterruptedException; 35 36 /* ------------------------------------------------------------ */ 37 /** 38 * @return The total number of threads currently in the pool 39 */ 40 public int getThreads(); 41 42 /* ------------------------------------------------------------ */ 43 /** 44 * @return The number of idle threads in the pool 45 */ 46 public int getIdleThreads(); 47 48 /* ------------------------------------------------------------ */ 49 /** 50 * @return True if the pool is low on threads 51 */ 52 public boolean isLowOnThreads(); 53 }