/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.camel.component.spring.integration.adapter;
import java.util.HashMap;
import java.util.Map;
import org.apache.camel.AsyncCallback;
import org.apache.camel.AsyncProcessor;
import org.apache.camel.Consumer;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.component.spring.integration.SpringIntegrationBinding;
import org.apache.camel.util.AsyncProcessorHelper;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.channel.PollableChannel;
import org.springframework.integration.core.Message;
import org.springframework.integration.core.MessageChannel;
import org.springframework.integration.core.MessageHeaders;
import org.springframework.integration.gateway.SimpleMessagingGateway;
import org.springframework.integration.message.MessageHandler;
import org.springframework.integration.transformer.Transformer;
/**
* A CamelContext will be injected into CameSourceAdapter which will
* let Spring Integration channel talk to the CamelContext certain endpoint
*
* @author Willem Jiang
*
* @version $Revision: 711528 $
*/
public class CamelSourceAdapter extends AbstractCamelAdapter implements InitializingBean {
protected final Object lifecycleMonitor = new Object();
private final Log logger = LogFactory.getLog(this.getClass());
private Consumer consumer;
private Endpoint camelEndpoint;
private MessageChannel requestChannel;
private DirectChannel replyChannel;
private volatile boolean initialized;
public void setRequestChannel(MessageChannel channel) {
requestChannel = channel;
}
public MessageChannel getChannel() {
return requestChannel;
}
public void setReplyChannel(DirectChannel channel) {
replyChannel = channel;
}
protected class ConsumerProcessor implements AsyncProcessor {
public void process(Exchange exchange) throws Exception {
AsyncProcessorHelper.process(this, exchange);
}
public boolean process(final Exchange exchange, final AsyncCallback callback) {
org.springframework.integration.core.Message request =
SpringIntegrationBinding.createSpringIntegrationMessage(exchange);
Map<String, Object> headers = new HashMap<String, Object>();
if (exchange.getPattern().isOutCapable()) {
headers.put(MessageHeaders.REPLY_CHANNEL , replyChannel);
replyChannel.subscribe(new MessageHandler() {
public void handleMessage(Message<?> message) {
//TODO set the corralationID
SpringIntegrationBinding.storeToCamelMessage(message, exchange.getOut());
callback.done(true);
}
});
}
requestChannel.send(request);
if (!exchange.getPattern().isOutCapable()) {
callback.done(true);
}
return true;
}
}
public final void afterPropertiesSet() throws Exception {
synchronized (this.lifecycleMonitor) {
if (this.initialized) {
return;
}
}
this.initialize();
this.initialized = true;
}
protected void initialize() throws Exception {
// start the service here
camelEndpoint = getCamelContext().getEndpoint(getCamelEndpointUri());
consumer = camelEndpoint.createConsumer(new ConsumerProcessor());
consumer.start();
}
}