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.BlockingQueue; 020 import java.util.concurrent.TimeUnit; 021 022 import org.apache.camel.AsyncCallback; 023 import org.apache.camel.AsyncProcessor; 024 import org.apache.camel.Consumer; 025 import org.apache.camel.Exchange; 026 import org.apache.camel.Processor; 027 import org.apache.camel.impl.ServiceSupport; 028 import org.apache.camel.impl.converter.AsyncProcessorTypeConverter; 029 import org.apache.commons.logging.Log; 030 import org.apache.commons.logging.LogFactory; 031 032 /** 033 * A Consumer for the SEDA component. 034 * 035 * @version $Revision: 56884 $ 036 */ 037 public class SedaConsumer extends ServiceSupport implements Consumer, Runnable { 038 private static final transient Log LOG = LogFactory.getLog(SedaConsumer.class); 039 040 private SedaEndpoint endpoint; 041 private AsyncProcessor processor; 042 private Thread thread; 043 044 public SedaConsumer(SedaEndpoint endpoint, Processor processor) { 045 this.endpoint = endpoint; 046 this.processor = AsyncProcessorTypeConverter.convert(processor); 047 } 048 049 @Override 050 public String toString() { 051 return "SedaConsumer: " + endpoint.getEndpointUri(); 052 } 053 054 public void run() { 055 BlockingQueue<Exchange> queue = endpoint.getQueue(); 056 while (queue != null && isRunAllowed()) { 057 final Exchange exchange; 058 try { 059 exchange = queue.poll(1000, TimeUnit.MILLISECONDS); 060 } catch (InterruptedException e) { 061 if (LOG.isDebugEnabled()) { 062 LOG.debug("Interupted: " + e, e); 063 } 064 continue; 065 } 066 if (exchange != null) { 067 if (isRunAllowed()) { 068 try { 069 processor.process(exchange, new AsyncCallback() { 070 public void done(boolean sync) { 071 } 072 }); 073 } catch (Exception e) { 074 LOG.error("Seda queue caught: " + e, e); 075 } 076 } else { 077 LOG.warn("This consumer is stopped during polling an exchange, so putting it back on the seda queue: " + exchange); 078 try { 079 queue.put(exchange); 080 } catch (InterruptedException e) { 081 if (LOG.isDebugEnabled()) { 082 LOG.debug("Interupted: " + e, e); 083 } 084 } 085 } 086 } 087 } 088 } 089 090 protected void doStart() throws Exception { 091 thread = new Thread(this, getThreadName(endpoint.getEndpointUri())); 092 thread.setDaemon(true); 093 thread.start(); 094 } 095 096 protected void doStop() throws Exception { 097 thread.join(); 098 thread = null; 099 } 100 101 }