/*
* 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.stratos.messaging.message.receiver.tenant;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.stratos.messaging.listener.EventListener;
import org.apache.stratos.messaging.message.processor.MessageProcessorChain;
import org.apache.stratos.messaging.message.processor.tenant.TenantMessageProcessorChain;
import org.apache.stratos.messaging.util.Constants;
import javax.jms.TextMessage;
/**
* Implements logic for processing topology event messages based on a given
* topology process chain.
*/
class TenantEventMessageDelegator implements Runnable {
private static final Log log = LogFactory.getLog(TenantEventMessageDelegator.class);
private TenantEventMessageQueue messageQueue;
private MessageProcessorChain processorChain;
private boolean terminated;
public TenantEventMessageDelegator(TenantEventMessageQueue messageQueue) {
this.messageQueue = messageQueue;
this.processorChain = new TenantMessageProcessorChain();
}
public void addEventListener(EventListener eventListener) {
processorChain.addEventListener(eventListener);
}
@Override
public void run() {
try {
if (log.isInfoEnabled()) {
log.info("Tenant event message delegator started");
}
while (!terminated) {
try {
TextMessage message = messageQueue.take();
// Retrieve the header
String type = message.getStringProperty(Constants.EVENT_CLASS_NAME);
// Retrieve the actual message
String json = message.getText();
if (log.isDebugEnabled()) {
log.debug(String.format("Tenant event message received from queue: %s", type));
}
// Delegate message to message processor chain
if (log.isDebugEnabled()) {
log.debug(String.format("Delegating tenant event message: %s", type));
}
processorChain.process(type, json, null);
} catch (Exception e) {
log.error("Failed to retrieve tenant event message", e);
}
}
} catch (Exception e) {
if (log.isErrorEnabled()) {
log.error("Tenant event message delegator failed", e);
}
}
}
/**
* Terminate topology event message delegator thread.
*/
public void terminate() {
terminated = true;
}
}