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/*
* Copyright (c) 2008-2018, 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.impl;
import com.hazelcast.config.TopicConfig;
import com.hazelcast.core.ITopic;
import com.hazelcast.core.Message;
import com.hazelcast.core.MessageListener;
import com.hazelcast.instance.MemberImpl;
import com.hazelcast.internal.cluster.ClusterService;
import com.hazelcast.monitor.LocalTopicStats;
import com.hazelcast.monitor.impl.LocalTopicStatsImpl;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.EventPublishingService;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.ManagedService;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.RemoteService;
import com.hazelcast.spi.StatisticsAwareService;
import com.hazelcast.util.ConstructorFunction;
import com.hazelcast.util.HashUtil;
import com.hazelcast.util.MapUtil;
import java.util.Collection;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import static com.hazelcast.util.ConcurrencyUtil.getOrPutSynchronized;
public class TopicService implements ManagedService, RemoteService, EventPublishingService,
StatisticsAwareService {
public static final String SERVICE_NAME = "hz:impl:topicService";
public static final int ORDERING_LOCKS_LENGTH = 1000;
private final ConcurrentMap statsMap = new ConcurrentHashMap();
private final Lock[] orderingLocks = new Lock[ORDERING_LOCKS_LENGTH];
private NodeEngine nodeEngine;
private final ConstructorFunction localTopicStatsConstructorFunction =
new ConstructorFunction() {
public LocalTopicStatsImpl createNew(String mapName) {
return new LocalTopicStatsImpl();
}
};
private EventService eventService;
private final AtomicInteger counter = new AtomicInteger(0);
private Address localAddress;
@Override
public void init(NodeEngine nodeEngine, Properties properties) {
this.nodeEngine = nodeEngine;
this.localAddress = nodeEngine.getThisAddress();
for (int i = 0; i < orderingLocks.length; i++) {
orderingLocks[i] = new ReentrantLock();
}
eventService = nodeEngine.getEventService();
}
// only for testing
public ConcurrentMap getStatsMap() {
return statsMap;
}
@Override
public void reset() {
statsMap.clear();
}
@Override
public void shutdown(boolean terminate) {
reset();
}
public Lock getOrderLock(String key) {
int index = getOrderLockIndex(key);
return orderingLocks[index];
}
private int getOrderLockIndex(String key) {
int hash = key.hashCode();
return HashUtil.hashToIndex(hash, orderingLocks.length);
}
@Override
public ITopic createDistributedObject(String name) {
TopicConfig topicConfig = nodeEngine.getConfig().findTopicConfig(name);
if (topicConfig.isGlobalOrderingEnabled()) {
return new TotalOrderedTopicProxy(name, nodeEngine, this);
} else {
return new TopicProxy(name, nodeEngine, this);
}
}
@Override
public void destroyDistributedObject(String objectId) {
statsMap.remove(objectId);
nodeEngine.getEventService().deregisterAllListeners(SERVICE_NAME, objectId);
}
@Override
public void dispatchEvent(Object event, Object listener) {
TopicEvent topicEvent = (TopicEvent) event;
ClusterService clusterService = nodeEngine.getClusterService();
MemberImpl member = clusterService.getMember(topicEvent.publisherAddress);
if (member == null) {
member = new MemberImpl(topicEvent.publisherAddress, nodeEngine.getVersion(), false);
}
Message message = new DataAwareMessage(topicEvent.name, topicEvent.data, topicEvent.publishTime, member
, nodeEngine.getSerializationService());
incrementReceivedMessages(topicEvent.name);
MessageListener messageListener = (MessageListener) listener;
messageListener.onMessage(message);
}
public LocalTopicStatsImpl getLocalTopicStats(String name) {
return getOrPutSynchronized(statsMap, name, statsMap, localTopicStatsConstructorFunction);
}
/**
* Increments the number of published messages on the ITopic
* with the name {@code topicName}.
*
* @param topicName the name of the {@link ITopic}
*/
public void incrementPublishes(String topicName) {
getLocalTopicStats(topicName).incrementPublishes();
}
/**
* Increments the number of received messages on the ITopic
* with the name {@code topicName}.
*
* @param topicName the name of the {@link ITopic}
*/
public void incrementReceivedMessages(String topicName) {
getLocalTopicStats(topicName).incrementReceives();
}
public void publishMessage(String topicName, Object payload, boolean multithreaded) {
Collection registrations = eventService.getRegistrations(SERVICE_NAME, topicName);
if (!registrations.isEmpty()) {
Data payloadData = nodeEngine.toData(payload);
TopicEvent topicEvent = new TopicEvent(topicName, payloadData, localAddress);
int partitionId = multithreaded ? counter.incrementAndGet() : topicName.hashCode();
eventService.publishEvent(SERVICE_NAME, registrations, topicEvent, partitionId);
}
}
public String addMessageListener(String name, MessageListener listener, boolean localOnly) {
EventRegistration eventRegistration;
if (localOnly) {
eventRegistration = eventService.registerLocalListener(TopicService.SERVICE_NAME, name, listener);
} else {
eventRegistration = eventService.registerListener(TopicService.SERVICE_NAME, name, listener);
}
return eventRegistration.getId();
}
public boolean removeMessageListener(String name, String registrationId) {
return eventService.deregisterListener(TopicService.SERVICE_NAME, name, registrationId);
}
@Override
public Map getStats() {
Map topicStats = MapUtil.createHashMap(statsMap.size());
for (Map.Entry queueStat : statsMap.entrySet()) {
topicStats.put(queueStat.getKey(), queueStat.getValue());
}
return topicStats;
}
}
