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.spring.integration.adapter;
018
019 import org.apache.camel.CamelContext;
020 import org.apache.camel.Exchange;
021 import org.apache.camel.ExchangePattern;
022 import org.apache.camel.ProducerTemplate;
023 import org.apache.camel.component.spring.integration.SpringIntegrationBinding;
024 import org.apache.camel.impl.DefaultCamelContext;
025 import org.apache.camel.impl.DefaultExchange;
026 import org.springframework.integration.Message;
027 import org.springframework.integration.MessageChannel;
028 import org.springframework.integration.MessageDeliveryException;
029 import org.springframework.integration.MessageHeaders;
030 import org.springframework.integration.core.MessageHandler;
031
032 /**
033 * CamelTargetAdapter will redirect the Spring Integration message to the Camel context.
034 * When we inject the camel context into it, we need also specify the Camel endpoint url
035 * we will route the Spring Integration message to the Camel context
036 *
037 * @version
038 */
039 public class CamelTargetAdapter extends AbstractCamelAdapter implements MessageHandler {
040 private ProducerTemplate camelTemplate;
041 private MessageChannel replyChannel;
042
043 public void setReplyChannel(MessageChannel channel) {
044 this.replyChannel = channel;
045 }
046
047 public MessageChannel getReplyChannel() {
048 return replyChannel;
049 }
050
051 public ProducerTemplate getCamelTemplate() throws Exception {
052 if (camelTemplate == null) {
053 CamelContext ctx = getCamelContext();
054 if (ctx == null) {
055 // TODO: This doesnt look good to create a new CamelContext out of the blue
056 ctx = new DefaultCamelContext();
057 }
058 camelTemplate = ctx.createProducerTemplate();
059 }
060 return camelTemplate;
061 }
062
063 public boolean send(Message<?> message) throws Exception {
064 boolean result = false;
065
066 ExchangePattern pattern;
067 if (isExpectReply()) {
068 pattern = ExchangePattern.InOut;
069 } else {
070 pattern = ExchangePattern.InOnly;
071 }
072
073 Exchange inExchange = new DefaultExchange(getCamelContext(), pattern);
074 SpringIntegrationBinding.storeToCamelMessage(message, inExchange.getIn());
075 Exchange outExchange = getCamelTemplate().send(getCamelEndpointUri(), inExchange);
076 if (outExchange.getOut() != null && outExchange.getOut().isFault()) {
077 result = true;
078 }
079
080 Message response;
081 if (isExpectReply()) {
082 //Check the message header for the return address
083 response = SpringIntegrationBinding.storeToSpringIntegrationMessage(outExchange.getOut());
084 if (replyChannel == null) {
085 MessageChannel messageReplyChannel = (MessageChannel) message.getHeaders().get(MessageHeaders.REPLY_CHANNEL);
086 if (messageReplyChannel != null) {
087 result = messageReplyChannel.send(response);
088 } else {
089 throw new MessageDeliveryException(response, "Cannot resolve ReplyChannel from message: " + message);
090 }
091 } else {
092 result = replyChannel.send(response);
093 }
094 }
095
096 return result;
097 }
098
099 public void handleMessage(Message<?> message) throws MessageDeliveryException {
100 try {
101 send(message);
102 } catch (Exception e) {
103 throw new MessageDeliveryException(message, "Cannot send message", e);
104 }
105 }
106
107 }