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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.geode.distributed.internal.membership.gms;
import org.apache.geode.CancelCriterion;
import org.apache.geode.ForcedDisconnectException;
import org.apache.geode.distributed.DistributedSystemDisconnectedException;
import org.apache.geode.distributed.internal.DMStats;
import org.apache.geode.distributed.internal.DistributionConfig;
import org.apache.geode.distributed.internal.InternalLocator;
import org.apache.geode.distributed.internal.membership.DistributedMembershipListener;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.distributed.internal.membership.MembershipManager;
import org.apache.geode.distributed.internal.membership.NetView;
import org.apache.geode.distributed.internal.membership.gms.auth.GMSAuthenticator;
import org.apache.geode.distributed.internal.membership.gms.fd.GMSHealthMonitor;
import org.apache.geode.distributed.internal.membership.gms.interfaces.*;
import org.apache.geode.distributed.internal.membership.gms.locator.GMSLocator;
import org.apache.geode.distributed.internal.membership.gms.membership.GMSJoinLeave;
import org.apache.geode.distributed.internal.membership.gms.messenger.JGroupsMessenger;
import org.apache.geode.distributed.internal.membership.gms.mgr.GMSMembershipManager;
import org.apache.geode.internal.admin.remote.RemoteTransportConfig;
import org.apache.geode.internal.logging.InternalLogWriter;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.internal.logging.LoggingThreadGroup;
import org.apache.geode.security.AuthenticationFailedException;
import org.apache.logging.log4j.Logger;
import java.util.Timer;
@SuppressWarnings("ConstantConditions")
public class Services {
private static final Logger logger = LogService.getLogger();
private static final ThreadGroup threadGroup =
LoggingThreadGroup.createThreadGroup("GemFire Membership", logger);
private static InternalLogWriter staticLogWriter;
private static InternalLogWriter staticSecurityLogWriter;
final private Manager manager;
final private JoinLeave joinLeave;
private Locator locator;
final private HealthMonitor healthMon;
final private Messenger messenger;
final private Authenticator auth;
final private ServiceConfig config;
final private DMStats stats;
final private Stopper cancelCriterion;
private volatile boolean stopping;
private volatile boolean stopped;
private volatile Exception shutdownCause;
private InternalLogWriter logWriter;
private InternalLogWriter securityLogWriter;
private final Timer timer = new Timer("Geode Membership Timer", true);
/**
* A common logger for membership classes
*/
public static Logger getLogger() {
return logger;
}
/**
* The thread group for all membership threads
*/
public static ThreadGroup getThreadGroup() {
return threadGroup;
}
/**
* a timer used for membership tasks
*/
public Timer getTimer() {
return this.timer;
}
public boolean isStopped() {
return this.stopped;
}
/**
* for testing only - create a non-functional Services object with a Stopper
*/
public Services() {
this.cancelCriterion = new Stopper();
this.stats = null;
this.config = null;
this.manager = null;
this.joinLeave = null;
this.healthMon = null;
this.messenger = null;
this.auth = null;
}
public Services(DistributedMembershipListener listener, DistributionConfig config,
RemoteTransportConfig transport, DMStats stats) {
this.cancelCriterion = new Stopper();
this.stats = stats;
this.config = new ServiceConfig(transport, config);
this.manager = new GMSMembershipManager(listener);
this.joinLeave = new GMSJoinLeave();
this.healthMon = new GMSHealthMonitor();
this.messenger = new JGroupsMessenger();
this.auth = new GMSAuthenticator();
}
protected void init() {
// InternalDistributedSystem establishes this log writer at boot time
// TODO fix this so that IDS doesn't know about Services
securityLogWriter = staticSecurityLogWriter;
staticSecurityLogWriter = null;
logWriter = staticLogWriter;
staticLogWriter = null;
this.auth.init(this);
this.messenger.init(this);
this.manager.init(this);
this.joinLeave.init(this);
this.healthMon.init(this);
InternalLocator l = (InternalLocator) org.apache.geode.distributed.Locator.getLocator();
if (l != null && l.getLocatorHandler() != null) {
if (l.getLocatorHandler().setMembershipManager((MembershipManager) this.manager)) {
this.locator = (Locator) l.getLocatorHandler();
}
}
}
protected void start() {
boolean started = false;
try {
logger.info("Starting membership services");
logger.debug("starting Authenticator");
this.auth.start();
logger.debug("starting Messenger");
this.messenger.start();
logger.debug("starting JoinLeave");
this.joinLeave.start();
logger.debug("starting HealthMonitor");
this.healthMon.start();
logger.debug("starting Manager");
this.manager.start();
started = true;
} catch (RuntimeException e) {
logger.fatal("Unexpected exception while booting membership services", e);
throw e;
} finally {
if (!started) {
this.manager.stop();
this.healthMon.stop();
this.joinLeave.stop();
this.messenger.stop();
this.auth.stop();
this.timer.cancel();
}
}
this.auth.started();
this.messenger.started();
this.joinLeave.started();
this.healthMon.started();
this.manager.started();
logger.debug("All membership services have been started");
try {
this.manager.joinDistributedSystem();
} catch (Throwable e) {
stop();
throw e;
}
}
public void emergencyClose() {
if (stopping) {
return;
}
stopping = true;
logger.info("Stopping membership services");
timer.cancel();
try {
joinLeave.emergencyClose();
} finally {
try {
healthMon.emergencyClose();
} finally {
try {
auth.emergencyClose();
} finally {
try {
messenger.emergencyClose();
} finally {
try {
manager.emergencyClose();
} finally {
cancelCriterion.cancel("Membership services are shut down");
stopped = true;
}
}
}
}
}
}
public void stop() {
if (stopping) {
return;
}
logger.info("Stopping membership services");
stopping = true;
try {
timer.cancel();
} finally {
try {
joinLeave.stop();
} finally {
try {
healthMon.stop();
} finally {
try {
auth.stop();
} finally {
try {
messenger.stop();
} finally {
try {
manager.stop();
} finally {
cancelCriterion.cancel("Membership services are shut down");
stopped = true;
}
}
}
}
}
}
}
public static void setLogWriter(InternalLogWriter writer) {
staticLogWriter = writer;
}
public static void setSecurityLogWriter(InternalLogWriter securityWriter) {
staticSecurityLogWriter = securityWriter;
}
public InternalLogWriter getLogWriter() {
return this.logWriter;
}
public InternalLogWriter getSecurityLogWriter() {
return this.securityLogWriter;
}
public Authenticator getAuthenticator() {
return auth;
}
public void installView(NetView v) {
try {
auth.installView(v);
} catch (AuthenticationFailedException e) {
return;
}
if (locator != null) {
locator.installView(v);
}
healthMon.installView(v);
messenger.installView(v);
manager.installView(v);
}
public void memberSuspected(InternalDistributedMember initiator,
InternalDistributedMember suspect, String reason) {
try {
joinLeave.memberSuspected(initiator, suspect, reason);
} finally {
try {
healthMon.memberSuspected(initiator, suspect, reason);
} finally {
try {
auth.memberSuspected(initiator, suspect, reason);
} finally {
try {
messenger.memberSuspected(initiator, suspect, reason);
} finally {
manager.memberSuspected(initiator, suspect, reason);
}
}
}
}
}
public Manager getManager() {
return manager;
}
public Locator getLocator() {
return locator;
}
public void setLocator(Locator locator) {
this.locator = locator;
}
public JoinLeave getJoinLeave() {
return joinLeave;
}
public HealthMonitor getHealthMonitor() {
return healthMon;
}
public ServiceConfig getConfig() {
return this.config;
}
public Messenger getMessenger() {
return this.messenger;
}
public DMStats getStatistics() {
return this.stats;
}
public Stopper getCancelCriterion() {
return this.cancelCriterion;
}
public void setShutdownCause(Exception e) {
this.shutdownCause = e;
}
public Exception getShutdownCause() {
return shutdownCause;
}
public boolean isShutdownDueToForcedDisconnect() {
return shutdownCause instanceof ForcedDisconnectException;
}
public boolean isAutoReconnectEnabled() {
return !getConfig().getDistributionConfig().getDisableAutoReconnect();
}
public byte[] getPublicKey(InternalDistributedMember mbr) {
if (locator != null) {
return ((GMSLocator) locator).getPublicKey(mbr);
}
return null;
}
public class Stopper extends CancelCriterion {
volatile String reasonForStopping = null;
public void cancel(String reason) {
this.reasonForStopping = reason;
}
@Override
public String cancelInProgress() {
if (Services.this.shutdownCause != null)
return Services.this.shutdownCause.toString();
return reasonForStopping;
}
@Override
public RuntimeException generateCancelledException(Throwable e) {
String reason = cancelInProgress();
if (reason == null) {
return null;
} else {
if (e == null) {
return new DistributedSystemDisconnectedException(reason);
} else {
return new DistributedSystemDisconnectedException(reason, e);
}
}
}
}
}