com.hazelcast.client.spi.impl.ClientClusterServiceImpl Maven / Gradle / Ivy
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/*
* Copyright (c) 2008-2020, 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.client.spi.impl;
import com.hazelcast.client.config.ClientConfig;
import com.hazelcast.client.connection.ClientConnectionManager;
import com.hazelcast.client.connection.nio.ClientConnection;
import com.hazelcast.client.impl.ClientImpl;
import com.hazelcast.client.impl.client.ClientPrincipal;
import com.hazelcast.client.impl.clientside.HazelcastClientInstanceImpl;
import com.hazelcast.client.spi.ClientClusterService;
import com.hazelcast.config.ListenerConfig;
import com.hazelcast.core.Client;
import com.hazelcast.core.Cluster;
import com.hazelcast.core.InitialMembershipEvent;
import com.hazelcast.core.InitialMembershipListener;
import com.hazelcast.core.Member;
import com.hazelcast.core.MemberAttributeEvent;
import com.hazelcast.core.MemberSelector;
import com.hazelcast.core.MembershipEvent;
import com.hazelcast.core.MembershipListener;
import com.hazelcast.internal.cluster.impl.MemberSelectingCollection;
import com.hazelcast.logging.ILogger;
import com.hazelcast.nio.Address;
import com.hazelcast.nio.ClassLoaderUtil;
import com.hazelcast.nio.Connection;
import com.hazelcast.util.Clock;
import com.hazelcast.util.UuidUtil;
import java.net.InetSocketAddress;
import java.util.Collection;
import java.util.Collections;
import java.util.EventListener;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicReference;
/**
* The {@link ClientClusterService} implementation.
*/
public class ClientClusterServiceImpl implements ClientClusterService {
protected final HazelcastClientInstanceImpl client;
private ClientMembershipListener clientMembershipListener;
private final AtomicReference> members = new AtomicReference>();
private final ConcurrentMap listeners = new ConcurrentHashMap();
private final Object initialMembershipListenerMutex = new Object();
private final Set labels;
public ClientClusterServiceImpl(HazelcastClientInstanceImpl client) {
this.client = client;
labels = Collections.unmodifiableSet(client.getClientConfig().getLabels());
ILogger logger = client.getLoggingService().getLogger(ClientClusterService.class);
ClientConfig clientConfig = getClientConfig();
List listenerConfigs = client.getClientConfig().getListenerConfigs();
for (ListenerConfig listenerConfig : listenerConfigs) {
EventListener listener = listenerConfig.getImplementation();
if (listener == null) {
try {
listener = ClassLoaderUtil.newInstance(clientConfig.getClassLoader(), listenerConfig.getClassName());
} catch (Exception e) {
logger.severe(e);
}
}
if (listener instanceof MembershipListener) {
addMembershipListenerWithoutInit((MembershipListener) listener);
}
}
members.set(Collections.unmodifiableMap(new LinkedHashMap()));
}
@Override
public Member getMember(Address address) {
return members.get().get(address);
}
@Override
public Member getMember(String uuid) {
final Collection memberList = getMemberList();
for (Member member : memberList) {
if (uuid.equals(member.getUuid())) {
return member;
}
}
return null;
}
@Override
public Collection getMemberList() {
return members.get().values();
}
@Override
public Collection getMembers(MemberSelector selector) {
return new MemberSelectingCollection(getMemberList(), selector);
}
@Override
public Address getMasterAddress() {
final Collection memberList = getMemberList();
return !memberList.isEmpty() ? new Address(memberList.iterator().next().getSocketAddress()) : null;
}
@Override
public int getSize() {
return getMemberList().size();
}
@Override
public int getSize(MemberSelector selector) {
int size = 0;
for (Member member : getMemberList()) {
if (selector.select(member)) {
size++;
}
}
return size;
}
@Override
public long getClusterTime() {
return Clock.currentTimeMillis();
}
@Override
public Client getLocalClient() {
final ClientConnectionManager cm = client.getConnectionManager();
final ClientConnection connection = cm.getOwnerConnection();
InetSocketAddress inetSocketAddress = connection != null ? connection.getLocalSocketAddress() : null;
ClientPrincipal principal = cm.getPrincipal();
final String uuid = principal != null ? principal.getUuid() : null;
return new ClientImpl(uuid, inetSocketAddress, client.getName(), labels);
}
@Override
public String addMembershipListener(MembershipListener listener) {
if (listener == null) {
throw new NullPointerException("listener can't be null");
}
synchronized (initialMembershipListenerMutex) {
String id = addMembershipListenerWithoutInit(listener);
initMembershipListener(listener);
return id;
}
}
private String addMembershipListenerWithoutInit(MembershipListener listener) {
String id = UuidUtil.newUnsecureUuidString();
listeners.put(id, listener);
return id;
}
private void initMembershipListener(MembershipListener listener) {
if (listener instanceof InitialMembershipListener) {
Cluster cluster = client.getCluster();
Collection memberCollection = members.get().values();
if (memberCollection.isEmpty()) {
//if members are empty,it means initial event did not arrive yet
//it will be redirected to listeners when it arrives see #handleInitialMembershipEvent
return;
}
LinkedHashSet members = new LinkedHashSet(memberCollection);
InitialMembershipEvent event = new InitialMembershipEvent(cluster, members);
((InitialMembershipListener) listener).init(event);
}
}
@Override
public boolean removeMembershipListener(String registrationId) {
if (registrationId == null) {
throw new NullPointerException("registrationId can't be null");
}
return listeners.remove(registrationId) != null;
}
public void listenMembershipEvents(Connection ownerConnection) throws Exception {
this.clientMembershipListener.listenMembershipEvents(ownerConnection);
}
public void cleanupOnDisconnect() {
this.clientMembershipListener.cleanupOnDisconnect();
}
public void clearMemberList() {
this.clientMembershipListener.clearMemberListOnClusterRestart();
}
public void start() {
this.clientMembershipListener = new ClientMembershipListener(client);
}
private ClientConfig getClientConfig() {
return client.getClientConfig();
}
void handleInitialMembershipEvent(InitialMembershipEvent event) {
synchronized (initialMembershipListenerMutex) {
Set initialMembers = event.getMembers();
LinkedHashMap newMap = new LinkedHashMap();
for (Member initialMember : initialMembers) {
newMap.put(initialMember.getAddress(), initialMember);
}
members.set(Collections.unmodifiableMap(newMap));
fireInitialMembershipEvent(event);
}
}
void handleMembershipEvent(MembershipEvent event) {
synchronized (initialMembershipListenerMutex) {
Member member = event.getMember();
LinkedHashMap newMap = new LinkedHashMap(members.get());
if (event.getEventType() == MembershipEvent.MEMBER_ADDED) {
newMap.put(member.getAddress(), member);
} else {
newMap.remove(member.getAddress());
}
members.set(Collections.unmodifiableMap(newMap));
fireMembershipEvent(event);
}
}
private void fireInitialMembershipEvent(InitialMembershipEvent event) {
for (MembershipListener listener : listeners.values()) {
if (listener instanceof InitialMembershipListener) {
((InitialMembershipListener) listener).init(event);
}
}
}
private void fireMembershipEvent(MembershipEvent event) {
for (MembershipListener listener : listeners.values()) {
if (event.getEventType() == MembershipEvent.MEMBER_ADDED) {
listener.memberAdded(event);
} else {
listener.memberRemoved(event);
}
}
}
void fireMemberAttributeEvent(final MemberAttributeEvent event) {
for (MembershipListener listener : listeners.values()) {
listener.memberAttributeChanged(event);
}
}
public void shutdown() {
}
public void reset() {
clientMembershipListener.clearMembersOnClusterChange();
synchronized (initialMembershipListenerMutex) {
members.set(Collections.emptyMap());
}
}
}