Java tutorial
/* * Copyright 2002-2007 the original author or authors. * * Licensed 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. */ package org.enterprisepower.net.portforward; import java.util.ArrayList; import java.util.List; import java.util.Iterator; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * * @author Kenneth Xu * */ public class Cleaner implements Runnable { private static final Log log = LogFactory.getLog(Cleaner.class); List<Cleanable> list = new ArrayList<Cleanable>(); public void run() { cleanup(); } public synchronized void cleanup() { while (true) { for (Iterator<Cleanable> itr = list.iterator(); itr.hasNext();) { Cleanable p = itr.next(); if (p.isCompleted()) { p.close(); itr.remove(); } } try { wait(3000); } catch (InterruptedException e) { log.error(e.getMessage(), e); } } } public synchronized void add(Cleanable p) { list.add(p); } }