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.AsyncCallback;
020 import org.apache.camel.AsyncProcessor;
021 import org.apache.camel.Endpoint;
022 import org.apache.camel.Exchange;
023 import org.apache.camel.Producer;
024 import org.apache.camel.Service;
025 import org.apache.camel.impl.ServiceSupport;
026 import org.apache.camel.impl.converter.AsyncProcessorTypeConverter;
027 import org.apache.commons.logging.Log;
028 import org.apache.commons.logging.LogFactory;
029
030 /**
031 * Processor for forwarding exchanges to an endpoint destination.
032 *
033 * @version $Revision: 659760 $
034 */
035 public class SendProcessor extends ServiceSupport implements AsyncProcessor, Service {
036 private static final transient Log LOG = LogFactory.getLog(SendProcessor.class);
037 private Endpoint destination;
038 private Producer producer;
039 private AsyncProcessor processor;
040
041 public SendProcessor(Endpoint destination) {
042 if (destination == null) {
043 throw new IllegalArgumentException("Endpoint cannot be null!");
044 }
045 this.destination = destination;
046 }
047
048 @Override
049 public String toString() {
050 return "sendTo(" + destination + ")";
051 }
052
053 public void process(Exchange exchange) throws Exception {
054 if (producer == null) {
055 if (isStopped()) {
056 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange);
057 } else {
058 throw new IllegalStateException("No producer, this processor has not been started!");
059 }
060 } else {
061 producer.process(exchange);
062 }
063 }
064
065 public boolean process(Exchange exchange, AsyncCallback callback) {
066 if (producer == null) {
067 if (isStopped()) {
068 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange);
069 } else {
070 exchange.setException(new IllegalStateException("No producer, this processor has not been started!"));
071 }
072 callback.done(true);
073 return true;
074 } else {
075 return processor.process(exchange, callback);
076 }
077 }
078
079 public Endpoint getDestination() {
080 return destination;
081 }
082
083 protected void doStart() throws Exception {
084 this.producer = destination.createProducer();
085 this.producer.start();
086 this.processor = AsyncProcessorTypeConverter.convert(producer);
087 }
088
089 protected void doStop() throws Exception {
090 if (producer != null) {
091 try {
092 producer.stop();
093 } finally {
094 producer = null;
095 processor = null;
096 }
097 }
098 }
099
100 }