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.seda; 018 019 import java.util.concurrent.TimeUnit; 020 021 import org.apache.camel.AlreadyStoppedException; 022 import org.apache.camel.Consumer; 023 import org.apache.camel.Exchange; 024 import org.apache.camel.Processor; 025 import org.apache.camel.impl.ServiceSupport; 026 import org.apache.commons.logging.Log; 027 import org.apache.commons.logging.LogFactory; 028 029 /** 030 * @version $Revision: 563607 $ 031 */ 032 public class SedaConsumer<E extends Exchange> extends ServiceSupport implements Consumer<E>, Runnable { 033 private static final Log LOG = LogFactory.getLog(SedaConsumer.class); 034 035 private SedaEndpoint<E> endpoint; 036 private Processor processor; 037 private Thread thread; 038 039 public SedaConsumer(SedaEndpoint<E> endpoint, Processor processor) { 040 this.endpoint = endpoint; 041 this.processor = processor; 042 } 043 044 @Override 045 public String toString() { 046 return "QueueConsumer: " + endpoint.getEndpointUri(); 047 } 048 049 public void run() { 050 while (!isStopping()) { 051 E exchange; 052 try { 053 exchange = endpoint.getQueue().poll(1000, TimeUnit.MILLISECONDS); 054 } catch (InterruptedException e) { 055 break; 056 } 057 if (exchange != null && !isStopping()) { 058 try { 059 processor.process(exchange); 060 } catch (AlreadyStoppedException e) { 061 LOG.debug("Ignoring failed message due to shutdown: " + e, e); 062 break; 063 } catch (Throwable e) { 064 LOG.error(e); 065 } 066 } 067 } 068 } 069 070 protected void doStart() throws Exception { 071 thread = new Thread(this, getThreadName(endpoint.getEndpointUri())); 072 thread.setDaemon(true); 073 thread.start(); 074 } 075 076 protected void doStop() throws Exception { 077 thread.join(); 078 } 079 080 }