1 package org.apache.commons.jcs.utils.threadpool; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import junit.framework.TestCase; 23 24 import java.util.concurrent.ThreadPoolExecutor; 25 26 /** 27 * This test is experimental. I'm trying to find out if the max size setting will result in the 28 * removal of threads. 29 * <p> 30 * @author Aaron Smuts 31 */ 32 public class ThreadPoolUnitTest 33 extends TestCase 34 { 35 /** 36 * Make sure that the max size setting takes effect before the idle time is reached. 37 * <p> 38 * We just want to ensure that we can adjust the max size of an active pool. 39 * <p> 40 * http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/PooledExecutor.html#setMaximumPoolSize(int) 41 * @throws Exception 42 */ 43 public void testMaxReduction() 44 throws Exception 45 { 46 //ThreadPoolManager.setPropsFileName( "thread_pool_test.properties" ); 47 ThreadPoolExecutor pool = ThreadPoolManager.getInstance().getPool( "maxtest" ); 48 49 //System.out.println( "pool = " + pool ); 50 pool.setMaximumPoolSize( 5 ); 51 //System.out.println( "current size before execute = " + pool.getPool().getPoolSize() ); 52 53 // add 6 54 for ( int i = 1; i < 30; i++ ) 55 { 56 final int cnt = i; 57 pool.execute( new Runnable() 58 { 59 60 @Override 61 public void run() 62 { 63 try 64 { 65 //System.out.println( cnt ); 66 // System.out.println( "count = " + cnt + " before sleep current size = " + myPool.getPoolSize() ); 67 Thread.sleep( 200 / cnt ); 68 //System.out.println( "count = " + cnt + " after sleep current size = " + myPool.getPool().getPoolSize() ); 69 } 70 catch ( InterruptedException e ) 71 { 72 // TODO Auto-generated catch block 73 e.printStackTrace(); 74 } 75 } 76 } ); 77 } 78 79 //System.out.println( "current size = " + pool.getPool().getPoolSize() ); 80 pool.setMaximumPoolSize( 4 ); 81 //Thread.sleep( 200 ); 82 //System.out.println( "current size after set size to 4= " + pool.getPool().getPoolSize() ); 83 Thread.sleep( 200 ); 84 //System.out.println( "current size again after sleep = " + pool.getPool().getPoolSize() ); 85 assertEquals( "Pool size should have been reduced.", 4, pool.getPoolSize() ); 86 } 87 }