001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.component.timer; 018 019 import java.lang.reflect.InvocationHandler; 020 import java.lang.reflect.InvocationTargetException; 021 import java.lang.reflect.Method; 022 import java.lang.reflect.Proxy; 023 import java.util.Timer; 024 import java.util.TimerTask; 025 026 import org.apache.camel.Processor; 027 import org.apache.camel.component.bean.BeanExchange; 028 import org.apache.camel.component.bean.BeanInvocation; 029 import org.apache.camel.impl.DefaultConsumer; 030 031 /** 032 * @version $Revision: 523047 $ 033 */ 034 public class TimerConsumer extends DefaultConsumer<BeanExchange> implements InvocationHandler { 035 036 private final TimerEndpoint endpoint; 037 private Timer timer; 038 039 public TimerConsumer(TimerEndpoint endpoint, Processor processor) { 040 super(endpoint, processor); 041 this.endpoint = endpoint; 042 } 043 044 @Override 045 protected void doStart() throws Exception { 046 TimerComponent component = endpoint.getComponent(); 047 component.addConsumer(this); 048 timer = createTimerAndTask(); 049 } 050 051 @Override 052 protected void doStop() throws Exception { 053 if (timer != null) { 054 timer.cancel(); 055 } 056 TimerComponent component = endpoint.getComponent(); 057 component.removeConsumer(this); 058 } 059 060 private Timer createTimerAndTask() { 061 062 final Runnable proxy = createProxy(); 063 TimerTask task = new TimerTask() { 064 @Override 065 public void run() { 066 proxy.run(); 067 } 068 }; 069 070 Timer result = new Timer(endpoint.getTimerName(), endpoint.isDaemon()); 071 if (endpoint.isFixedRate()) { 072 if (endpoint.getTime() != null) { 073 result.scheduleAtFixedRate(task, endpoint.getTime(), endpoint.getPeriod()); 074 } else { 075 result.scheduleAtFixedRate(task, endpoint.getDelay(), endpoint.getPeriod()); 076 } 077 } else { 078 if (endpoint.getTime() != null) { 079 if (endpoint.getPeriod() >= 0) { 080 result.schedule(task, endpoint.getTime(), endpoint.getPeriod()); 081 } else { 082 result.schedule(task, endpoint.getTime()); 083 } 084 } else { 085 if (endpoint.getPeriod() >= 0) { 086 result.schedule(task, endpoint.getDelay(), endpoint.getPeriod()); 087 } else { 088 result.schedule(task, endpoint.getDelay()); 089 } 090 } 091 } 092 return result; 093 } 094 095 /** 096 * Creates a Proxy which generates the inbound PojoExchanges 097 */ 098 public Runnable createProxy() { 099 return (Runnable)Proxy.newProxyInstance(Runnable.class.getClassLoader(), 100 new Class[] {Runnable.class}, this); 101 } 102 103 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 104 if (!isStarted()) { 105 throw new IllegalStateException("The endpoint is not active: " + getEndpoint().getEndpointUri()); 106 } 107 BeanInvocation invocation = new BeanInvocation(proxy, method, args); 108 BeanExchange exchange = getEndpoint().createExchange(); 109 exchange.setInvocation(invocation); 110 getProcessor().process(exchange); 111 Throwable fault = exchange.getException(); 112 if (fault != null) { 113 throw new InvocationTargetException(fault); 114 } 115 return exchange.getOut().getBody(); 116 } 117 118 }