/* Copyright 2011-2012 the original author or authors:
*
* Marc Palmer (marc@grailsrocks.com)
* Stéphane Maldini (stephane.maldini@gmail.com)
*
* Licensed 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.grails.plugin.platform.events.dispatcher;
import org.apache.log4j.Logger;
import org.codehaus.groovy.grails.support.PersistenceContextInterceptor;
import org.grails.plugin.platform.events.EventMessage;
import org.grails.plugin.platform.events.publisher.EventsPublisherGateway;
import org.springframework.integration.Message;
import org.springframework.integration.MessageChannel;
import org.springframework.integration.channel.ChannelInterceptor;
/**
* @author Stephane Maldini <smaldini@doc4web.com>
* @version 1.0
* @file
* @date 05/01/12
* @section DESCRIPTION
* <p/>
* [Does stuff]
*/
public class PersistentContextInterceptor implements ChannelInterceptor {
static final private Logger log = Logger.getLogger(PersistentContextInterceptor.class);
private PersistenceContextInterceptor persistenceInterceptor;
private boolean catchFlushExceptions = false;
public void setCatchFlushExceptions(boolean catchFlushExceptions) {
this.catchFlushExceptions = catchFlushExceptions;
}
public void setPersistenceInterceptor(PersistenceContextInterceptor persistenceInterceptor) {
this.persistenceInterceptor = persistenceInterceptor;
}
public Message<?> preSend(Message<?> message, MessageChannel messageChannel) {
EventMessage event = (EventMessage)message.getHeaders().get(EventsPublisherGateway.EVENT_OBJECT_KEY);
if (event != null && event.isGormSession()) {
persistenceInterceptor.init();
log.debug("intercepting");
}
return message;
}
public void postSend(Message<?> message, MessageChannel messageChannel, boolean b) {
EventMessage event = (EventMessage)message.getHeaders().get(EventsPublisherGateway.EVENT_OBJECT_KEY);
if (event.isGormSession()) {
try {
persistenceInterceptor.flush();
log.debug("flushed");
} catch (RuntimeException re) {
if (!catchFlushExceptions)
throw re;
} finally {
persistenceInterceptor.destroy();
}
}
}
public boolean preReceive(MessageChannel messageChannel) {
return true;
}
public Message<?> postReceive(Message<?> message, MessageChannel messageChannel) {
return message;
}
}