/*
* 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.spi.impl;
import com.hazelcast.core.HazelcastException;
import com.hazelcast.core.MemberLeftException;
import com.hazelcast.instance.GroupProperties;
import com.hazelcast.instance.MemberImpl;
import com.hazelcast.instance.Node;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.Connection;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.Packet;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.nio.serialization.DataSerializable;
import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
import com.hazelcast.spi.AbstractOperation;
import com.hazelcast.spi.EventFilter;
import com.hazelcast.spi.EventPublishingService;
import com.hazelcast.spi.EventRegistration;
import com.hazelcast.spi.EventService;
import com.hazelcast.spi.annotation.PrivateApi;
import com.hazelcast.util.ConcurrencyUtil;
import com.hazelcast.util.ConstructorFunction;
import com.hazelcast.util.executor.StripedExecutor;
import com.hazelcast.util.executor.StripedRunnable;
import com.hazelcast.util.executor.TimeoutRunnable;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
/**
* @author mdogan 12/14/12
*/
public class EventServiceImpl implements EventService {
private static final EventRegistration[] EMPTY_REGISTRATIONS = new EventRegistration[0];
private final ILogger logger;
private final NodeEngineImpl nodeEngine;
private final ConcurrentMap<String, EventServiceSegment> segments;
private final StripedExecutor eventExecutor;
private final int eventQueueTimeoutMs;
private final int eventThreadCount;
private final int eventQueueCapacity;
EventServiceImpl(NodeEngineImpl nodeEngine) {
this.nodeEngine = nodeEngine;
logger = nodeEngine.getLogger(EventService.class.getName());
final Node node = nodeEngine.getNode();
GroupProperties groupProperties = node.getGroupProperties();
eventThreadCount = groupProperties.EVENT_THREAD_COUNT.getInteger();
eventQueueCapacity = groupProperties.EVENT_QUEUE_CAPACITY.getInteger();
eventQueueTimeoutMs = groupProperties.EVENT_QUEUE_TIMEOUT_MILLIS.getInteger();
eventExecutor = new StripedExecutor(nodeEngine.executionService.getCachedExecutor(), eventThreadCount, eventQueueCapacity);
segments = new ConcurrentHashMap<String, EventServiceSegment>();
}
@Override
public int getEventThreadCount() {
return eventThreadCount;
}
@Override
public int getEventQueueCapacity() {
return eventQueueCapacity;
}
@Override
public int getEventQueueSize() {
return eventExecutor.getWorkQueueSize();
}
public EventRegistration registerLocalListener(String serviceName, String topic, Object listener) {
return registerListenerInternal(serviceName, topic, new EmptyFilter(), listener, true);
}
public EventRegistration registerLocalListener(String serviceName, String topic, EventFilter filter, Object listener) {
return registerListenerInternal(serviceName, topic, filter, listener, true);
}
public EventRegistration registerListener(String serviceName, String topic, Object listener) {
return registerListenerInternal(serviceName, topic, new EmptyFilter(), listener, false);
}
public EventRegistration registerListener(String serviceName, String topic, EventFilter filter, Object listener) {
return registerListenerInternal(serviceName, topic, filter, listener, false);
}
private EventRegistration registerListenerInternal(String serviceName, String topic, EventFilter filter,
Object listener, boolean localOnly) {
if (listener == null) {
throw new IllegalArgumentException("Listener required!");
}
if (filter == null) {
throw new IllegalArgumentException("EventFilter required!");
}
EventServiceSegment segment = getSegment(serviceName, true);
Registration reg = new Registration(UUID.randomUUID().toString(), serviceName, topic, filter,
nodeEngine.getThisAddress(), listener, localOnly);
if (segment.addRegistration(topic, reg)) {
if (!localOnly) {
invokeRegistrationOnOtherNodes(serviceName, reg);
}
return reg;
} else {
return null;
}
}
private boolean handleRegistration(Registration reg) {
if (nodeEngine.getThisAddress().equals(reg.getSubscriber())) {
return false;
}
EventServiceSegment segment = getSegment(reg.serviceName, true);
return segment.addRegistration(reg.topic, reg);
}
public boolean deregisterListener(String serviceName, String topic, Object id) {
final EventServiceSegment segment = getSegment(serviceName, false);
if (segment != null) {
final Registration reg = segment.removeRegistration(topic, String.valueOf(id));
if (reg != null && !reg.isLocalOnly()) {
invokeDeregistrationOnOtherNodes(serviceName, topic, String.valueOf(id));
}
return reg != null;
}
return false;
}
public void deregisterAllListeners(String serviceName, String topic) {
final EventServiceSegment segment = getSegment(serviceName, false);
if (segment != null) {
segment.removeRegistrations(topic);
}
}
private void deregisterSubscriber(String serviceName, String topic, String id) {
final EventServiceSegment segment = getSegment(serviceName, false);
if (segment != null) {
segment.removeRegistration(topic, id);
}
}
private void invokeRegistrationOnOtherNodes(String serviceName, Registration reg) {
Collection<MemberImpl> members = nodeEngine.getClusterService().getMemberList();
Collection<Future> calls = new ArrayList<Future>(members.size());
for (MemberImpl member : members) {
if (!member.localMember()) {
Future f = nodeEngine.getOperationService().invokeOnTarget(serviceName,
new RegistrationOperation(reg), member.getAddress());
calls.add(f);
}
}
for (Future f : calls) {
try {
f.get(5, TimeUnit.SECONDS);
} catch (InterruptedException ignored) {
} catch (TimeoutException ignored) {
} catch (MemberLeftException e) {
logger.finest("Member left while registering listener...", e);
} catch (ExecutionException e) {
throw new HazelcastException(e);
}
}
}
private void invokeDeregistrationOnOtherNodes(String serviceName, String topic, String id) {
Collection<MemberImpl> members = nodeEngine.getClusterService().getMemberList();
Collection<Future> calls = new ArrayList<Future>(members.size());
for (MemberImpl member : members) {
if (!member.localMember()) {
Future f = nodeEngine.getOperationService().invokeOnTarget(serviceName,
new DeregistrationOperation(topic, id), member.getAddress());
calls.add(f);
}
}
for (Future f : calls) {
try {
f.get(5, TimeUnit.SECONDS);
} catch (InterruptedException ignored) {
} catch (TimeoutException ignored) {
} catch (MemberLeftException e) {
logger.finest("Member left while de-registering listener...", e);
} catch (ExecutionException e) {
throw new HazelcastException(e);
}
}
}
public EventRegistration[] getRegistrationsAsArray(String serviceName, String topic) {
final EventServiceSegment segment = getSegment(serviceName, false);
if (segment != null) {
final Collection<Registration> registrations = segment.getRegistrations(topic, false);
return registrations != null && !registrations.isEmpty()
? registrations.toArray(new Registration[registrations.size()])
: EMPTY_REGISTRATIONS;
}
return EMPTY_REGISTRATIONS;
}
public Collection<EventRegistration> getRegistrations(String serviceName, String topic) {
final EventServiceSegment segment = getSegment(serviceName, false);
if (segment != null) {
final Collection<Registration> registrations = segment.getRegistrations(topic, false);
return registrations != null && !registrations.isEmpty()
? Collections.<EventRegistration>unmodifiableCollection(registrations)
: Collections.<EventRegistration>emptySet();
}
return Collections.emptySet();
}
@Override
public boolean hasEventRegistration(String serviceName, String topic) {
EventServiceSegment segment = getSegment(serviceName,false);
if(segment != null){
return segment.hasRegistrations(topic);
}
return false;
}
@Override
public void publishEvent(String serviceName, String topic, Object event, int orderKey) {
Collection<EventRegistration> registrations = getRegistrations(serviceName, topic);
publishEvent(serviceName, registrations, event, orderKey);
}
@Override
public void publishEvent(String serviceName, EventRegistration registration, Object event, int orderKey) {
if (!(registration instanceof Registration)) {
throw new IllegalArgumentException();
}
final Registration reg = (Registration) registration;
if (isLocal(reg)) {
executeLocal(serviceName, event, reg, orderKey);
} else {
final Address subscriber = registration.getSubscriber();
sendEventPacket(subscriber, new EventPacket(registration.getId(), serviceName, event), orderKey);
}
}
public void publishEvent(String serviceName, Collection<EventRegistration> registrations, Object event, int orderKey) {
final Iterator<EventRegistration> iter = registrations.iterator();
Data eventData = null;
while (iter.hasNext()) {
EventRegistration registration = iter.next();
if (!(registration instanceof Registration)) {
throw new IllegalArgumentException();
}
final Registration reg = (Registration) registration;
if (isLocal(reg)) {
executeLocal(serviceName, event, reg, orderKey);
} else {
if (eventData == null) {
eventData = nodeEngine.toData(event);
}
final Address subscriber = registration.getSubscriber();
sendEventPacket(subscriber, new EventPacket(registration.getId(), serviceName, eventData), orderKey);
}
}
}
private void executeLocal(String serviceName, Object event, Registration reg, int orderKey) {
if (nodeEngine.isActive()) {
try {
if (reg.listener != null) {
eventExecutor.execute(new LocalEventDispatcher(serviceName, event, reg.listener, orderKey, eventQueueTimeoutMs));
} else {
logger.warning("Something seems wrong! Listener instance is null! -> " + reg);
}
} catch (RejectedExecutionException e) {
if (eventExecutor.isLive()) {
logger.warning("EventQueue overloaded! " + event + " failed to publish to " + reg.serviceName + ":" + reg.topic);
}
}
}
}
private void sendEventPacket(Address subscriber, EventPacket eventPacket, int orderKey) {
final String serviceName = eventPacket.serviceName;
final EventServiceSegment segment = getSegment(serviceName, true);
boolean sync = segment.incrementPublish() % 100000 == 0;
if (sync) {
Future f = nodeEngine.getOperationService().createInvocationBuilder(serviceName,
new SendEventOperation(eventPacket, orderKey), subscriber).setTryCount(50).invoke();
try {
f.get(3, TimeUnit.SECONDS);
} catch (Exception ignored) {
}
} else {
final Packet packet = new Packet(nodeEngine.toData(eventPacket), orderKey, nodeEngine.getSerializationContext());
packet.setHeader(Packet.HEADER_EVENT);
nodeEngine.send(packet, subscriber);
}
}
private EventServiceSegment getSegment(String service, boolean forceCreate) {
EventServiceSegment segment = segments.get(service);
if (segment == null && forceCreate) {
return ConcurrencyUtil.getOrPutIfAbsent(segments, service, new ConstructorFunction<String, EventServiceSegment>() {
public EventServiceSegment createNew(String key) {
return new EventServiceSegment(key);
}
});
}
return segment;
}
private boolean isLocal(Registration reg) {
return nodeEngine.getThisAddress().equals(reg.getSubscriber());
}
@Override
public void executeEventCallback(Runnable callback) {
if (nodeEngine.isActive()) {
try {
eventExecutor.execute(callback);
} catch (RejectedExecutionException e) {
if (eventExecutor.isLive()) {
logger.warning("EventQueue overloaded! Failed to execute event callback: " + callback);
}
}
}
}
@PrivateApi
void handleEvent(Packet packet) {
try {
eventExecutor.execute(new RemoteEventPacketProcessor(packet));
} catch (RejectedExecutionException e) {
if (eventExecutor.isLive()) {
final Connection conn = packet.getConn();
String endpoint = conn.getEndPoint() != null ? conn.getEndPoint().toString() : conn.toString();
logger.warning("EventQueue overloaded! Failed to process event packet sent from: " + endpoint);
}
}
}
public PostJoinRegistrationOperation getPostJoinOperation() {
final Collection<Registration> registrations = new LinkedList<Registration>();
for (EventServiceSegment segment : segments.values()) {
for (Registration reg : segment.registrationIdMap.values()) {
if (!reg.isLocalOnly()) {
registrations.add(reg);
}
}
}
return registrations.isEmpty() ? null : new PostJoinRegistrationOperation(registrations);
}
void shutdown() {
logger.finest("Stopping event executor...");
eventExecutor.shutdown();
for (EventServiceSegment segment : segments.values()) {
segment.clear();
}
segments.clear();
}
void onMemberLeft(MemberImpl member) {
final Address address = member.getAddress();
for (EventServiceSegment segment : segments.values()) {
segment.onMemberLeft(address);
}
}
private static class EventServiceSegment {
final String serviceName;
final ConcurrentMap<String, Collection<Registration>> registrations
= new ConcurrentHashMap<String, Collection<Registration>>();
final ConcurrentMap<String, Registration> registrationIdMap = new ConcurrentHashMap<String, Registration>();
final AtomicInteger totalPublishes = new AtomicInteger();
EventServiceSegment(String serviceName) {
this.serviceName = serviceName;
}
private Collection<Registration> getRegistrations(String topic, boolean forceCreate) {
Collection<Registration> listenerList = registrations.get(topic);
if (listenerList == null && forceCreate) {
return ConcurrencyUtil.getOrPutIfAbsent(registrations, topic, new ConstructorFunction<String, Collection<Registration>>() {
public Collection<Registration> createNew(String key) {
return Collections.newSetFromMap(new ConcurrentHashMap<Registration, Boolean>());
}
});
}
return listenerList;
}
private boolean hasRegistrations(String topic) {
Collection<Registration> topicRegistrations = registrations.get(topic);
return !(topicRegistrations == null || topicRegistrations.isEmpty());
}
private boolean addRegistration(String topic, Registration registration) {
final Collection<Registration> registrations = getRegistrations(topic, true);
if (registrations.add(registration)) {
registrationIdMap.put(registration.id, registration);
return true;
}
return false;
}
private Registration removeRegistration(String topic, String id) {
final Registration registration = registrationIdMap.remove(id);
if (registration != null) {
final Collection<Registration> all = registrations.get(topic);
if (all != null) {
all.remove(registration);
}
}
return registration;
}
void removeRegistrations(String topic) {
final Collection<Registration> all = registrations.remove(topic);
if (all != null) {
for (Registration reg : all) {
registrationIdMap.remove(reg.getId());
}
}
}
void clear() {
registrations.clear();
registrationIdMap.clear();
}
void onMemberLeft(Address address) {
for (Collection<Registration> all : registrations.values()) {
Iterator<Registration> iter = all.iterator();
while (iter.hasNext()) {
Registration reg = iter.next();
if (address.equals(reg.getSubscriber())) {
iter.remove();
registrationIdMap.remove(reg.id);
}
}
}
}
int incrementPublish() {
return totalPublishes.incrementAndGet();
}
}
private class EventPacketProcessor implements StripedRunnable {
private EventPacket eventPacket;
int orderKey;
private EventPacketProcessor() {
}
public EventPacketProcessor(EventPacket packet, int orderKey) {
this.eventPacket = packet;
this.orderKey = orderKey;
}
public void run() {
process(eventPacket);
}
void process(EventPacket eventPacket) {
Object eventObject = eventPacket.event;
if (eventObject instanceof Data) {
eventObject = nodeEngine.toObject(eventObject);
}
final String serviceName = eventPacket.serviceName;
EventPublishingService<Object, Object> service = nodeEngine.getService(serviceName);
if (service == null) {
if (nodeEngine.isActive()) {
logger.warning("There is no service named: " + serviceName);
}
return;
}
EventServiceSegment segment = getSegment(serviceName, false);
if (segment == null) {
if (nodeEngine.isActive()) {
logger.warning("No service registration found for " + serviceName);
}
return;
}
Registration registration = segment.registrationIdMap.get(eventPacket.id);
if (registration == null) {
if (nodeEngine.isActive()) {
if (logger.isFinestEnabled()) {
logger.finest("No registration found for " + serviceName + " / " + eventPacket.id);
}
}
return;
}
if (!isLocal(registration)) {
logger.severe("Invalid target for " + registration);
return;
}
if (registration.listener == null) {
logger.warning("Something seems wrong! Subscriber is local but listener instance is null! -> " + registration);
return;
}
service.dispatchEvent(eventObject, registration.listener);
}
public int getKey() {
return orderKey;
}
public String toString() {
final StringBuilder sb = new StringBuilder("EventPacketProcessor{");
sb.append("eventPacket=").append(eventPacket);
sb.append('}');
return sb.toString();
}
}
private class RemoteEventPacketProcessor extends EventPacketProcessor implements StripedRunnable {
private Packet packet;
public RemoteEventPacketProcessor(Packet packet) {
this.packet = packet;
this.orderKey = packet.getPartitionId();
}
public void run() {
Data data = packet.getData();
EventPacket eventPacket = (EventPacket) nodeEngine.toObject(data);
process(eventPacket);
}
}
private class LocalEventDispatcher implements StripedRunnable, TimeoutRunnable {
final String serviceName;
final Object event;
final Object listener;
final int orderKey;
final long timeoutMs;
private LocalEventDispatcher(String serviceName, Object event, Object listener, int orderKey, long timeoutMs) {
this.serviceName = serviceName;
this.event = event;
this.listener = listener;
this.orderKey = orderKey;
this.timeoutMs = timeoutMs;
}
public long getTimeout() {
return timeoutMs;
}
public TimeUnit getTimeUnit() {
return TimeUnit.MILLISECONDS;
}
public final void run() {
final EventPublishingService<Object, Object> service = nodeEngine.getService(serviceName);
if (service != null) {
service.dispatchEvent(event, listener);
} else {
if (nodeEngine.isActive()) {
throw new IllegalArgumentException("Service[" + serviceName + "] could not be found!");
}
}
}
public int getKey() {
return orderKey;
}
}
public static class Registration implements EventRegistration {
private String id;
private String serviceName;
private String topic;
private EventFilter filter;
private Address subscriber;
private transient boolean localOnly;
private transient Object listener;
public Registration() {
}
public Registration(String id, String serviceName, String topic,
EventFilter filter, Address subscriber, Object listener, boolean localOnly) {
this.filter = filter;
this.id = id;
this.listener = listener;
this.serviceName = serviceName;
this.topic = topic;
this.subscriber = subscriber;
this.localOnly = localOnly;
}
public EventFilter getFilter() {
return filter;
}
public String getId() {
return id;
}
public Address getSubscriber() {
return subscriber;
}
public boolean isLocalOnly() {
return localOnly;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Registration that = (Registration) o;
if (id != null ? !id.equals(that.id) : that.id != null) return false;
if (serviceName != null ? !serviceName.equals(that.serviceName) : that.serviceName != null) return false;
if (topic != null ? !topic.equals(that.topic) : that.topic != null) return false;
if (filter != null ? !filter.equals(that.filter) : that.filter != null) return false;
if (subscriber != null ? !subscriber.equals(that.subscriber) : that.subscriber != null) return false;
return true;
}
@Override
public int hashCode() {
int result = id != null ? id.hashCode() : 0;
result = 31 * result + (serviceName != null ? serviceName.hashCode() : 0);
result = 31 * result + (topic != null ? topic.hashCode() : 0);
result = 31 * result + (filter != null ? filter.hashCode() : 0);
result = 31 * result + (subscriber != null ? subscriber.hashCode() : 0);
return result;
}
public void writeData(ObjectDataOutput out) throws IOException {
out.writeUTF(id);
out.writeUTF(serviceName);
out.writeUTF(topic);
subscriber.writeData(out);
out.writeObject(filter);
}
public void readData(ObjectDataInput in) throws IOException {
id = in.readUTF();
serviceName = in.readUTF();
topic = in.readUTF();
subscriber = new Address();
subscriber.readData(in);
filter = in.readObject();
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("Registration");
sb.append("{filter=").append(filter);
sb.append(", id='").append(id).append('\'');
sb.append(", serviceName='").append(serviceName).append('\'');
sb.append(", subscriber=").append(subscriber);
sb.append(", listener=").append(listener);
sb.append('}');
return sb.toString();
}
}
public final static class EventPacket implements IdentifiedDataSerializable {
private String id;
private String serviceName;
private Object event;
public EventPacket() {
}
EventPacket(String id, String serviceName, Object event) {
this.event = event;
this.id = id;
this.serviceName = serviceName;
}
public void writeData(ObjectDataOutput out) throws IOException {
out.writeUTF(id);
out.writeUTF(serviceName);
out.writeObject(event);
}
public void readData(ObjectDataInput in) throws IOException {
id = in.readUTF();
serviceName = in.readUTF();
event = in.readObject();
}
public int getFactoryId() {
return SpiDataSerializerHook.F_ID;
}
public int getId() {
return SpiDataSerializerHook.EVENT_PACKET;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder("EventPacket{");
sb.append("id='").append(id).append('\'');
sb.append(", serviceName='").append(serviceName).append('\'');
sb.append(", event=").append(event);
sb.append('}');
return sb.toString();
}
}
public static final class EmptyFilter implements EventFilter, DataSerializable {
public boolean eval(Object arg) {
return true;
}
public void writeData(ObjectDataOutput out) throws IOException {
}
public void readData(ObjectDataInput in) throws IOException {
}
@Override
public boolean equals(Object obj) {
return obj instanceof EmptyFilter;
}
@Override
public int hashCode() {
return 0;
}
}
public static class SendEventOperation extends AbstractOperation {
private EventPacket eventPacket;
private int orderKey;
public SendEventOperation() {
}
public SendEventOperation(EventPacket eventPacket, int orderKey) {
this.eventPacket = eventPacket;
this.orderKey = orderKey;
}
public void run() throws Exception {
EventServiceImpl eventService = (EventServiceImpl) getNodeEngine().getEventService();
eventService.executeEventCallback(eventService.new EventPacketProcessor(eventPacket, orderKey));
}
public boolean returnsResponse() {
return true;
}
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
eventPacket.writeData(out);
out.writeInt(orderKey);
}
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
eventPacket = new EventPacket();
eventPacket.readData(in);
orderKey = in.readInt();
}
}
public static class RegistrationOperation extends AbstractOperation {
private Registration registration;
private boolean response = false;
public RegistrationOperation() {
}
private RegistrationOperation(Registration registration) {
this.registration = registration;
}
public void run() throws Exception {
EventServiceImpl eventService = (EventServiceImpl) getNodeEngine().getEventService();
response = eventService.handleRegistration(registration);
}
@Override
public Object getResponse() {
return response;
}
@Override
public boolean returnsResponse() {
return true;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
registration.writeData(out);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
registration = new Registration();
registration.readData(in);
}
}
public static class DeregistrationOperation extends AbstractOperation {
private String topic;
private String id;
DeregistrationOperation() {
}
private DeregistrationOperation(String topic, String id) {
this.topic = topic;
this.id = id;
}
public void run() throws Exception {
EventServiceImpl eventService = (EventServiceImpl) getNodeEngine().getEventService();
eventService.deregisterSubscriber(getServiceName(), topic, id);
}
@Override
public Object getResponse() {
return true;
}
@Override
public boolean returnsResponse() {
return true;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
out.writeUTF(topic);
out.writeUTF(id);
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
topic = in.readUTF();
id = in.readUTF();
}
}
public static class PostJoinRegistrationOperation extends AbstractOperation {
private Collection<Registration> registrations;
public PostJoinRegistrationOperation() {
}
public PostJoinRegistrationOperation(Collection<Registration> registrations) {
this.registrations = registrations;
}
@Override
public void run() throws Exception {
if (registrations != null && registrations.size() > 0) {
NodeEngineImpl nodeEngine = (NodeEngineImpl) getNodeEngine();
EventServiceImpl eventService = nodeEngine.eventService;
for (Registration reg : registrations) {
eventService.handleRegistration(reg);
}
}
}
@Override
public boolean returnsResponse() {
return false;
}
@Override
protected void writeInternal(ObjectDataOutput out) throws IOException {
super.writeInternal(out);
int len = registrations != null ? registrations.size() : 0;
out.writeInt(len);
if (len > 0) {
for (Registration reg : registrations) {
reg.writeData(out);
}
}
}
@Override
protected void readInternal(ObjectDataInput in) throws IOException {
super.readInternal(in);
int len = in.readInt();
if (len > 0) {
registrations = new ArrayList<Registration>(len);
for (int i = 0; i < len; i++) {
Registration reg = new Registration();
registrations.add(reg);
reg.readData(in);
}
}
}
}
}