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 /* ------------------------------------------------------------ */ 19 /** ThreadPool. 20 * @author gregw 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 org.mortbay.component.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 }