001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.component.queue; 019 020 import org.apache.camel.Consumer; 021 import org.apache.camel.Exchange; 022 import org.apache.camel.Processor; 023 import org.apache.camel.impl.ServiceSupport; 024 025 import java.util.concurrent.TimeUnit; 026 027 /** 028 * @version $Revision: 534145 $ 029 */ 030 public class QueueEndpointConsumer<E extends Exchange> extends ServiceSupport implements Consumer<E>, Runnable { 031 private QueueEndpoint<E> endpoint; 032 private Processor processor; 033 private Thread thread; 034 035 public QueueEndpointConsumer(QueueEndpoint<E> endpoint, Processor processor) { 036 this.endpoint = endpoint; 037 this.processor = processor; 038 } 039 040 @Override 041 public String toString() { 042 return "QueueEndpointConsumer: " + endpoint.getEndpointUri(); 043 } 044 045 public void run() { 046 while (!isStopping()) { 047 E exchange; 048 try { 049 exchange = endpoint.getQueue().poll(1000, TimeUnit.MILLISECONDS); 050 } 051 catch (InterruptedException e) { 052 break; 053 } 054 if (exchange != null && !isStopping()) { 055 try { 056 processor.process(exchange); 057 } 058 catch (Throwable e) { 059 e.printStackTrace(); 060 } 061 } 062 } 063 } 064 065 protected void doStart() throws Exception { 066 thread = new Thread(this, endpoint.getEndpointUri()); 067 thread.setDaemon(true); 068 thread.start(); 069 } 070 071 protected void doStop() throws Exception { 072 thread.join(); 073 } 074 }