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.ExchangePattern;
022    import org.apache.camel.Processor;
023    import org.apache.camel.Producer;
024    import org.apache.camel.ProducerCallback;
025    import org.apache.camel.impl.ProducerCache;
026    import org.apache.camel.impl.ServiceSupport;
027    import org.apache.camel.util.ObjectHelper;
028    import org.apache.commons.logging.Log;
029    import org.apache.commons.logging.LogFactory;
030    
031    /**
032     * Processor for forwarding exchanges to an endpoint destination.
033     *
034     * @version $Revision: 788621 $
035     */
036    public class SendProcessor extends ServiceSupport implements Processor, Traceable {
037        protected static final transient Log LOG = LogFactory.getLog(SendProcessor.class);
038        protected ProducerCache producerCache;
039        protected Endpoint destination;
040        protected ExchangePattern pattern;
041    
042        public SendProcessor(Endpoint destination) {
043            ObjectHelper.notNull(destination, "destination");
044            this.destination = destination;
045        }
046    
047        public SendProcessor(Endpoint destination, ExchangePattern pattern) {
048            this(destination);
049            this.pattern = pattern;
050        }
051    
052        @Override
053        public String toString() {
054            return "sendTo(" + destination + (pattern != null ? " " + pattern : "") + ")";
055        }
056    
057        public String getTraceLabel() {
058            return destination.getEndpointUri();
059        }
060    
061        public void process(final Exchange exchange) throws Exception {
062            getProducerCache(exchange).doInProducer(destination, exchange, pattern, new ProducerCallback<Exchange>() {
063                public Exchange doInProducer(Producer producer, Exchange exchange, ExchangePattern pattern) throws Exception {
064                    exchange = configureExchange(exchange, pattern);
065                    producer.process(exchange);
066                    return exchange;
067                }
068            });
069        }
070    
071        protected ProducerCache getProducerCache(Exchange exchange) throws Exception {
072            // setup producer cache as we need to use the pluggable service pool defined on camel context
073            if (producerCache == null) {
074                this.producerCache = new ProducerCache(exchange.getContext().getProducerServicePool());
075                this.producerCache.start();
076            }
077            return this.producerCache;
078        }
079    
080        public Endpoint getDestination() {
081            return destination;
082        }
083    
084        protected Exchange configureExchange(Exchange exchange, ExchangePattern pattern) {
085            if (pattern != null) {
086                exchange.setPattern(pattern);
087            }
088            return exchange;
089        }
090    
091        protected void doStart() throws Exception {
092            if (producerCache != null) {
093                producerCache.start();
094            }
095        }
096    
097        protected void doStop() throws Exception {
098            if (producerCache != null) {
099                producerCache.stop();
100            }
101        }
102    
103    }