/**
* 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.concurrent.atomic.AtomicBoolean;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.integration.Message;
import org.springframework.integration.MessageChannel;
import org.springframework.integration.MessageHeaders;
import org.springframework.integration.channel.DirectChannel;
import org.springframework.integration.core.MessageHandler;
/**
* A CamelContext will be injected into CameSourceAdapter which will
* let Spring Integration channel talk to the CamelContext certain endpoint
*
* @version
*/
public class CamelSourceAdapter extends AbstractCamelAdapter implements InitializingBean, DisposableBean {
private static final Logger LOG = LoggerFactory.getLogger(CamelSourceAdapter.class);
private Consumer consumer;
private Endpoint camelEndpoint;
private MessageChannel requestChannel;
private DirectChannel replyChannel;
private final AtomicBoolean initialized = new AtomicBoolean();
public void setRequestChannel(MessageChannel channel) {
requestChannel = channel;
}
public MessageChannel getChannel() {
return requestChannel;
}
public void setReplyChannel(DirectChannel channel) {
replyChannel = channel;
}
protected class ConsumerProcessor implements Processor {
public void process(final Exchange exchange) throws Exception {
org.springframework.integration.Message<?> request = SpringIntegrationBinding.createSpringIntegrationMessage(exchange);
if (exchange.getPattern().isOutCapable()) {
exchange.getIn().getHeaders().put(MessageHeaders.REPLY_CHANNEL , replyChannel);
// we want to do in-out so the inputChannel is mandatory (used to receive reply from spring integration)
if (replyChannel == null) {
throw new IllegalArgumentException("ReplyChannel has not been configured on: " + this);
}
replyChannel.subscribe(new MessageHandler() {
public void handleMessage(Message<?> message) {
LOG.debug("Received {} from ReplyChannel: {}", message, replyChannel);
//TODO set the corralationID
SpringIntegrationBinding.storeToCamelMessage(message, exchange.getOut());
}
});
}
requestChannel.send(request);
}
}
public final void afterPropertiesSet() throws Exception {
if (initialized.compareAndSet(false, true)) {
initialize();
}
}
public void destroy() throws Exception {
if (consumer != null) {
consumer.stop();
}
}
protected void initialize() throws Exception {
// start the service here
camelEndpoint = getCamelContext().getEndpoint(getCamelEndpointUri());
consumer = camelEndpoint.createConsumer(new ConsumerProcessor());
consumer.start();
}
}