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.processor;
018    
019    import org.apache.camel.Endpoint;
020    import org.apache.camel.Exchange;
021    import org.apache.camel.Processor;
022    import org.apache.camel.Producer;
023    import org.apache.camel.Service;
024    import org.apache.camel.impl.ServiceSupport;
025    import org.apache.commons.logging.Log;
026    import org.apache.commons.logging.LogFactory;
027    
028    /**
029     * @version $Revision: 563607 $
030     */
031    public class SendProcessor extends ServiceSupport implements Processor, Service {
032        private static final transient Log LOG = LogFactory.getLog(SendProcessor.class);
033        private Endpoint destination;
034        private Producer producer;
035    
036        public SendProcessor(Endpoint destination) {
037            if (destination == null) {
038                throw new IllegalArgumentException("Endpoint cannot be null!");
039            }
040            this.destination = destination;
041        }
042    
043        protected void doStop() throws Exception {
044            if (producer != null) {
045                try {
046                    producer.stop();
047                } finally {
048                    producer = null;
049                }
050            }
051        }
052    
053        protected void doStart() throws Exception {
054            this.producer = destination.createProducer();
055        }
056    
057        public void process(Exchange exchange) throws Exception {
058            if (producer == null) {
059                if (isStopped()) {
060                    LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange);
061                } else {
062                    throw new IllegalStateException("No producer, this processor has not been started!");
063                }
064            } else {
065                producer.process(exchange);
066            }
067        }
068    
069        public Endpoint getDestination() {
070            return destination;
071        }
072    
073        @Override
074        public String toString() {
075            return "sendTo(" + destination + ")";
076        }
077    }