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.AsyncCallback;
022    import org.apache.camel.AsyncProcessor;
023    import org.apache.camel.Consumer;
024    import org.apache.camel.Exchange;
025    import org.apache.camel.Processor;
026    import org.apache.camel.impl.ServiceSupport;
027    import org.apache.camel.impl.converter.AsyncProcessorTypeConverter;
028    import org.apache.commons.logging.Log;
029    import org.apache.commons.logging.LogFactory;
030    
031    /**
032     * A Consumer for the SEDA component.
033     *
034     * @version $Revision: 41832 $
035     */
036    public class SedaConsumer extends ServiceSupport implements Consumer, Runnable {
037        private static final transient Log LOG = LogFactory.getLog(SedaConsumer.class);
038    
039        private SedaEndpoint endpoint;
040        private AsyncProcessor processor;
041        private Thread thread;
042    
043        public SedaConsumer(SedaEndpoint endpoint, Processor processor) {
044            this.endpoint = endpoint;
045            this.processor = AsyncProcessorTypeConverter.convert(processor);
046        }
047    
048        @Override
049        public String toString() {
050            return "SedaConsumer: " + endpoint.getEndpointUri();
051        }
052    
053        public void run() {
054            while (isRunAllowed()) {
055                final Exchange exchange;
056                try {
057                    exchange = endpoint.getQueue().poll(1000, TimeUnit.MILLISECONDS);
058                } catch (InterruptedException e) {
059                    if (LOG.isDebugEnabled()) {
060                        LOG.debug("Interupted: " + e, e);
061                    }
062                    continue;
063                }
064                if (exchange != null && isRunAllowed()) {
065                    try {
066                        processor.process(exchange, new AsyncCallback() {
067                            public void done(boolean sync) {
068                            }
069                        });
070                    } catch (Exception e) {
071                        LOG.error("Seda queue caught: " + e, e);
072                    }
073                }
074            }
075        }
076    
077        protected void doStart() throws Exception {
078            thread = new Thread(this, getThreadName(endpoint.getEndpointUri()));
079            thread.setDaemon(true);
080            thread.start();
081        }
082    
083        protected void doStop() throws Exception {
084            thread.join();
085        }
086    
087    }