/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.topic;
import com.hazelcast.config.ListenerConfig;
import com.hazelcast.config.TopicConfig;
import com.hazelcast.core.HazelcastInstanceAware;
import com.hazelcast.core.MessageListener;
import com.hazelcast.instance.MemberImpl;
import com.hazelcast.monitor.LocalTopicStats;
import com.hazelcast.monitor.impl.LocalTopicStatsImpl;
import com.hazelcast.nio.ClassLoaderUtil;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.AbstractDistributedObject;
import com.hazelcast.spi.InitializingObject;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.util.ExceptionUtil;
abstract class TopicProxySupport extends AbstractDistributedObject<TopicService> implements InitializingObject {
private final String name;
private final ClassLoader configClassLoader;
private final TopicService topicService;
private final LocalTopicStatsImpl topicStats;
private final MemberImpl localMember;
TopicProxySupport(String name, NodeEngine nodeEngine, TopicService service) {
super(nodeEngine, service);
this.name = name;
this.configClassLoader = nodeEngine.getConfigClassLoader();
this.topicService = service;
this.topicStats = topicService.getLocalTopicStats(name);
this.localMember = nodeEngine.getLocalMember();
}
@Override
public void initialize() {
NodeEngine nodeEngine = getNodeEngine();
TopicConfig config = nodeEngine.getConfig().findTopicConfig(name);
for (ListenerConfig listenerConfig : config.getMessageListenerConfigs()) {
initialize(listenerConfig);
}
}
private void initialize(ListenerConfig listenerConfig) {
NodeEngine nodeEngine = getNodeEngine();
MessageListener listener = loadListener(listenerConfig);
if (listener == null) {
return;
}
if (listener instanceof HazelcastInstanceAware) {
HazelcastInstanceAware hazelcastInstanceAware = (HazelcastInstanceAware) listener;
hazelcastInstanceAware.setHazelcastInstance(nodeEngine.getHazelcastInstance());
}
addMessageListenerInternal(listener);
}
private MessageListener loadListener(ListenerConfig listenerConfig) {
try {
MessageListener listener = (MessageListener) listenerConfig.getImplementation();
if (listener == null && listenerConfig.getClassName() != null) {
listener = ClassLoaderUtil.newInstance(configClassLoader, listenerConfig.getClassName());
}
return listener;
} catch (Exception e) {
throw ExceptionUtil.rethrow(e);
}
}
public LocalTopicStats getLocalTopicStatsInternal() {
return topicService.getLocalTopicStats(name);
}
public void publishInternal(Data message) {
TopicEvent topicEvent = new TopicEvent(name, message, localMember.getAddress());
topicStats.incrementPublishes();
topicService.publishEvent(name, topicEvent);
}
public String addMessageListenerInternal(MessageListener listener) {
return topicService.addMessageListener(name, listener);
}
public boolean removeMessageListenerInternal(final String registrationId) {
return topicService.removeMessageListener(name, registrationId);
}
@Override
public String getServiceName() {
return TopicService.SERVICE_NAME;
}
@Override
public String getName() {
return name;
}
}