| package org.apache.commons.jcs.utils.threadpool; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import junit.framework.TestCase; |
| |
| import java.util.concurrent.ThreadPoolExecutor; |
| |
| /** |
| * This test is experimental. I'm trying to find out if the max size setting will result in the |
| * removal of threads. |
| * <p> |
| * @author Aaron Smuts |
| */ |
| public class ThreadPoolUnitTest |
| extends TestCase |
| { |
| /** |
| * Make sure that the max size setting takes effect before the idle time is reached. |
| * <p> |
| * We just want to ensure that we can adjust the max size of an active pool. |
| * <p> |
| * http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/PooledExecutor.html#setMaximumPoolSize(int) |
| * @throws Exception |
| */ |
| public void testMaxReduction() |
| throws Exception |
| { |
| //ThreadPoolManager.setPropsFileName( "thread_pool_test.properties" ); |
| ThreadPoolExecutor pool = ThreadPoolManager.getInstance().getPool( "maxtest" ); |
| |
| //System.out.println( "pool = " + pool ); |
| pool.setMaximumPoolSize( 5 ); |
| //System.out.println( "current size before execute = " + pool.getPool().getPoolSize() ); |
| |
| // add 6 |
| for ( int i = 1; i < 30; i++ ) |
| { |
| final int cnt = i; |
| pool.execute( new Runnable() |
| { |
| |
| @Override |
| public void run() |
| { |
| try |
| { |
| //System.out.println( cnt ); |
| // System.out.println( "count = " + cnt + " before sleep current size = " + myPool.getPoolSize() ); |
| Thread.sleep( 200 / cnt ); |
| //System.out.println( "count = " + cnt + " after sleep current size = " + myPool.getPool().getPoolSize() ); |
| } |
| catch ( InterruptedException e ) |
| { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| } |
| } ); |
| } |
| |
| //System.out.println( "current size = " + pool.getPool().getPoolSize() ); |
| pool.setMaximumPoolSize( 4 ); |
| //Thread.sleep( 200 ); |
| //System.out.println( "current size after set size to 4= " + pool.getPool().getPoolSize() ); |
| Thread.sleep( 200 ); |
| //System.out.println( "current size again after sleep = " + pool.getPool().getPoolSize() ); |
| assertEquals( "Pool size should have been reduced.", 4, pool.getPoolSize() ); |
| } |
| } |