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/*
* Copyright (c) 2010-2015 Pivotal Software, 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. See accompanying
* LICENSE file.
*/
package com.gemstone.gemfire.internal.cache;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.ConcurrentModificationException;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import com.gemstone.gemfire.CancelCriterion;
import com.gemstone.gemfire.CancelException;
import com.gemstone.gemfire.SystemFailure;
import com.gemstone.gemfire.cache.Cache;
import com.gemstone.gemfire.cache.GatewayException;
import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.server.CacheServer;
import com.gemstone.gemfire.cache.util.Gateway;
import com.gemstone.gemfire.cache.util.GatewayHub;
import com.gemstone.gemfire.distributed.DistributedLockService;
import com.gemstone.gemfire.distributed.DistributedSystem;
import com.gemstone.gemfire.distributed.GatewayCancelledException;
import com.gemstone.gemfire.distributed.internal.InternalDistributedSystem;
import com.gemstone.gemfire.distributed.internal.MembershipListener;
import com.gemstone.gemfire.distributed.internal.locks.DLockService;
import com.gemstone.gemfire.distributed.internal.membership.InternalDistributedMember;
import com.gemstone.gemfire.i18n.LogWriterI18n;
import com.gemstone.gemfire.internal.Assert;
import com.gemstone.gemfire.internal.LogWriterImpl;
import com.gemstone.gemfire.internal.cache.tier.Acceptor;
import com.gemstone.gemfire.internal.cache.tier.sockets.AcceptorImpl;
import com.gemstone.gemfire.internal.cache.wan.GatewaySenderEventCallbackArgument;
import com.gemstone.gemfire.internal.concurrent.CFactory;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
import com.gemstone.gemfire.internal.util.ArrayUtils;
import com.gemstone.gemfire.internal.util.concurrent.StoppableReentrantReadWriteLock;
import com.gemstone.gemfire.internal.util.concurrent.StoppableReentrantReadWriteLock.StoppableWriteLock;
import com.gemstone.gemfire.pdx.internal.PeerTypeRegistration;
/**
* Class GatewayHubImpl is an implementation of the
* GatewayHub interface that manages a collection of
* Gateways. It listens for connections from other
* GatewayHub s using an {@link Acceptor}.
*
* @author Barry Oglesby
* @since 4.2
*
* @see GatewayImpl
*/
public class GatewayHubImpl implements GatewayHub, MembershipListener
{
/** Synchronizes lifecycle state including start, stop, and _isRunning */
private final Object controlLock = new Object();
private class Stopper extends CancelCriterion {
final CancelCriterion stopper;
Stopper(CancelCriterion stopper) {
this.stopper = stopper;
}
@Override
public String cancelInProgress() {
// checkFailure(); // done by stopper
String oops = stopper.cancelInProgress();
if (oops != null) {
return oops;
}
if (GatewayHubImpl.this._isRunning) {
return null;
}
return LocalizedStrings.GatewayHubImpl_HAS_BEEN_STOPPED.toLocalizedString() ;
}
@Override
public RuntimeException generateCancelledException(Throwable e) {
RuntimeException result = stopper.generateCancelledException(e);
if (result != null) {
return result;
}
if (GatewayHubImpl.this._isRunning) {
return null;
}
return new GatewayCancelledException(LocalizedStrings.GatewayHubImpl_HAS_BEEN_STOPPED.toLocalizedString(), e);
}
}
protected final Stopper stopper;
public CancelCriterion getCancelCriterion() {
return stopper;
}
/** Protects lifecycle from colliding with distribution of data */
private final StoppableReentrantReadWriteLock distributionRWLock;
/**
* The GemFire cache that is served by this GatewayHub
*/
private final GemFireCacheImpl _cache;
/**
* The GemFire log writer
*/
protected final LogWriterI18n _logger;
/**
* Whether the Gateway is running. Back to a volatile so it can
* be sampled while someone else is holding the controlLock. This is needed so
* it can be tested while a stop is in progress.
*/
protected volatile boolean _isRunning;
/**
* The acceptor that does the actual serving
*/
private AcceptorImpl _acceptor;
/**
* The port on which this GatewayHub listens for clients to
* connect.
*/
private int _port;
/**
* The identifier of this GatewayHub.
*/
private volatile String _id;
/**
* The buffer size in bytes of the socket connection for this
* GatewayHub
*/
private int _socketBufferSize;
/**
* The maximum amount of time between client pings. This value is used by the
* ClientHealthMonitor to determine the health of this
* BridgeServer's clients.
*/
private int _maximumTimeBetweenPings;
/**
* Synchronizes updates to the {@link #allGateways} field
*/
protected final Object allGatewaysLock = new Object();
/**
* A list of this GatewayHub's known Gateways.
*/
protected volatile AbstractGateway allGateways[] = new AbstractGateway[0];
/**
* A list of the ids of this GatewayHub's known
* Gateways.
*/
private final List _gatewayIds = CFactory.createCOWAL();
/**
* An unmodifiable list of the ids of this GatewayHub's known
* Gateways.
*/
private final List _readOnlyGatewayIds = Collections.unmodifiableList(this._gatewayIds);
/**
* The LinkedQueue used by the QueuedExecutor.
* This is stored in an instance variable so that its size can be monitored.
*/
private final LinkedBlockingQueue _executorQueue = new LinkedBlockingQueue();
/**
* Boolean which indicates if this Hub should ever become a primary.
* This is use by Sql Fabric to ensure that Hubs which are of type client
* never become primary as they will not be having GatewayQueues for dispatch
*/
final private boolean capableOfBecomingPrimary ;
/**
* This boolean indicates that the hub is sql fabric hub
* with DBSynchronizer attached to it
*/
//private volatile boolean isDBSynchronizerHub = false;
/**
* byte indicating order of hub type
*/
final private int hubType ;
public static final int NO_HUB = 0;
//If a region is not associated with any gfxd created hub it will be 1
public static final int NON_GFXD_HUB = 0X01<<24;
// if a region is associated with WAN_HUB only it would be 2
public static final int GFXD_WAN_HUB = 0X02<<24;
//if a region is associated with any AsyncEventListenerHub then it would be 4. This means
// that region may or may not have a WAN type hub
public static final int GFXD_ASYNC_EVENT_HUB = 0x03<<24;
//if a region is associated with any DBynchronizer type hub then it would be 8.
public static final int GFXD_ASYNC_DBSYNCH_HUB = 0x04<<24;
/**
* The QueuedExecutor that is between the local
* DistributedSystem and the WAN processing of the event. This
* QueuedExecutor exists so that the local
* DistributedSystem is not much affected by the WAN
* processing.
*/
private final ThreadPoolExecutor _executor;
/**
* The DistributedLockService for used for determining primary /
* secondary roles for failover purposes.
*/
protected DistributedLockService _lockService;
/**
* The token used by the DistributedLockService
*/
protected final String _lockToken;
/**
* Whether this is the primary GatewayHub
*/
protected volatile boolean _primary;
/**
* A Thread that is used to obtain the primary / secondary
* lock. This Thread is only launched if this
* GatewayHub is not the primary.
*/
private Thread _lockObtainingThread;
/**
* The GatewayHubStats used by this GatewayHub.
*/
private GatewayHubStats _statistics;
/**
* The startup policy for this GatewayHub. The options are:
*
* - none
* - primary
* - secondary
*
*/
private String _startupPolicy;
/**
* Whether to manually start this GatewayHub
*/
private boolean _manualStart;
/**
* The ip address or host name that this GatewayHub will listen on.
* @since 6.5.1
*/
private String _bindAddress;
/**
* A boolean that defines whether the GatewayHub should
* asynchronously distribute events it receives to its Gateway
* s. This boolean is false by default (meaning the GatewayHub
* synchronously distributes events it receives to its Gateway
* s). Distribution from a Gateway to its remove
* Gateway is always asynchronous. This boolean only decouples
* the local distributed system operations from the GatewayHub
* operations.
*
* The GatewayHub uses a QueuedExecutor to
* decouple event distribution from the activites of the
* DistributedSystem. To asynchronously distribute events
* received to Gateways, the
* gemfire.useAsynchronousDistribution java system property can
* be set. Setting this boolean to true means that operations in the local
* DistributedSystem will not be negatively affected
* performance-wise by adding a GatewayHub. The disadvantage
* is that setting this boolean to true might result in data loss if this VM
* fails and the queue contains any data.
*/
private static final boolean USE_ASYNCHRONOUS_DISTRIBUTION = Boolean
.getBoolean("gemfire.asynchronous-gateway-distribution-enabled");
/**
* A boolean that defines whether the value of the conserve-sockets property
* in the gemfire.properties file is preserved. By default, the value in
* gemfire.properties is overridden so that queue ordering is preserved. If
* ALLOW_CONSERVE_SOCKETS=true, then the conserve-sockets property is
* used and queue ordering may not be preserved. This property can be set
* using the System property called 'gemfire.gateway-conserve-sockets-allowed'.
*/
protected static final boolean ALLOW_CONSERVE_SOCKETS =
Boolean.getBoolean("gemfire.gateway-conserve-sockets-allowed");
//////////////////////// Constructors //////////////////////
/**
* Constructor. Creates a new GatewayHub that serves the
* contents of the give Cache. It has the default
* configuration.
*
* @param cache
* The GemFire cache
*/
public GatewayHubImpl(GemFireCacheImpl cache, String id, int port,
boolean isCapableOfBecomingPrimary) {
this._cache = cache;
this.stopper = new Stopper(cache.getCancelCriterion());
this.distributionRWLock = new StoppableReentrantReadWriteLock(stopper);
this._logger = cache.getLoggerI18n();
this._id = id;
this._port = port;
this._lockToken = getDistributedLockServiceName() + "-token";
this._statistics = new GatewayHubStats(cache.getDistributedSystem(), id);
this._socketBufferSize = DEFAULT_SOCKET_BUFFER_SIZE;
this._maximumTimeBetweenPings = DEFAULT_MAXIMUM_TIME_BETWEEN_PINGS;
this._startupPolicy = DEFAULT_STARTUP_POLICY;
this._manualStart = DEFAULT_MANUAL_START;
// TODO: merge: get rid of hubType; better get rid of all Hub related
// classes/calls in trunk itself and merge from there
this.hubType = NON_GFXD_HUB;
this.capableOfBecomingPrimary = isCapableOfBecomingPrimary;
this._bindAddress = DEFAULT_BIND_ADDRESS;
{
final ThreadGroup loggerGroup = LogWriterImpl.createThreadGroup(
"Gateway Hub Logger Group", this._logger);
// Create the Executor
ThreadFactory tf = new ThreadFactory() {
public Thread newThread(Runnable command) {
Thread thread = new Thread(loggerGroup, command,
"Queued Gateway Hub Thread");
thread.setDaemon(true);
return thread;
}
};
this._executor = new ThreadPoolExecutor(1, 1/*max unused*/,
120, TimeUnit.SECONDS,
this._executorQueue, tf);
}
}
////////////////////// Instance Methods ///////////////////
/**
* Checks to see whether or not this GatewayHub is running. If
* so, an {@link IllegalStateException}is thrown.
*/
private void checkRunning()
{
if (stopper.cancelInProgress() == null) {
throw new IllegalStateException(LocalizedStrings.GatewayHubImpl_A_BRIDGE_SERVERS_CONFIGURATION_CANNOT_BE_CHANGED_ONCE_IT_IS_RUNNING.toLocalizedString());
}
}
public int getPort() {
synchronized (this.controlLock) {
return basicGetPort();
}
}
private int basicGetPort() {
if (this._acceptor != null) {
return this._acceptor.getPort();
} else {
return this._port;
}
}
public void setPort(int port) {
synchronized (this.controlLock) {
checkRunning();
this._port = port;
}
}
public String getId() {
// Changed to volatile with no synchronization so that
// GatewayImpl.GatewayEventDispatcher.toString doesn't
// get into a deadlock situation.
return this._id;
}
public void setId(String id) {
synchronized (this.controlLock) {
checkRunning();
this._id = id;
}
}
public String getBindAddress() {
return this._bindAddress;
}
public void setBindAddress(String address) {
synchronized (this.controlLock) {
checkRunning();
this._bindAddress = address;
}
}
public void setSocketBufferSize(int socketBufferSize) {
synchronized (this.controlLock) {
this._socketBufferSize = socketBufferSize;
}
}
public int getSocketBufferSize() {
synchronized (this.controlLock) {
return this._socketBufferSize;
}
}
public void setMaximumTimeBetweenPings(int maximumTimeBetweenPings) {
synchronized (this.controlLock) {
this._maximumTimeBetweenPings = maximumTimeBetweenPings;
}
}
public int getMaximumTimeBetweenPings() {
synchronized (this.controlLock) {
return this._maximumTimeBetweenPings;
}
}
public Gateway addGateway(String id) throws GatewayException {
return addGateway(id, Gateway.DEFAULT_CONCURRENCY_LEVEL);
}
public Gateway addGateway(String id, int concurrencyLevel)
throws GatewayException {
synchronized (this.controlLock) {
checkRunning();
AbstractGateway gateway;
synchronized (allGatewaysLock) {
// If a gateway with the id is already defined, throw an exception
if (alreadyDefinesGateway(id)) {
throw new GatewayException(LocalizedStrings.GatewayHubImpl_GATEWAYHUB_0_ALREADY_DEFINES_A_GATEWAY_WITH_ID_1.toLocalizedString(new Object[] {this._id, id}));
}
if (concurrencyLevel < Gateway.DEFAULT_CONCURRENCY_LEVEL) {
throw new GatewayException(
LocalizedStrings.Gateway_INVALID_CONCURRENCY_LEVEL
.toLocalizedString(new Object[] { id, concurrencyLevel }));
}
gateway = concurrencyLevel > Gateway.DEFAULT_CONCURRENCY_LEVEL
? new GatewayParallelImpl(this, id, concurrencyLevel) : new GatewayImpl(this, id);
AbstractGateway snap[] = allGateways; // volatile fetch
this.allGateways = (AbstractGateway[]) ArrayUtils.insert(snap, snap.length,
gateway);
this._gatewayIds.add(id);
}
this._statistics.incNumberOfGateways();
return gateway;
}
}
public void removeGateway(String id) throws GatewayException {
synchronized (this.controlLock) {
checkRunning();
synchronized (allGatewaysLock) {
int pos = findGateway(id);
if (pos == -1) {
throw new GatewayException(LocalizedStrings.GatewayHubImpl_GATEWAYHUB_0_DOES_NOT_CONTAIN_A_GATEWAY_WITH_ID_1.toLocalizedString(new Object[] {this._id, id}));
}
this.allGateways = (AbstractGateway[]) ArrayUtils.remove(allGateways, pos);
this._gatewayIds.remove(pos);
}
this._statistics.incNumberOfGateways(-1);
}
}
public List getGateways() { // KIRK search product code for getGateways
Gateway snap[] = this.allGateways;
ArrayList result = new ArrayList();
for (int i = 0; i < snap.length; i++) {
result.add(snap[i]);
}
return result;
}
public List getGatewayIds() {
return this._readOnlyGatewayIds;
}
/**
* Sets the configuration of this GatewayHub based on
* the configuration of another GatewayHub.
*
* @param other
* the GatewayHub form which to configure this one
*/
public void configureFrom(GatewayHub other) throws GatewayException
{
synchronized (this.controlLock) {
this.setSocketBufferSize(other.getSocketBufferSize());
this.setMaximumTimeBetweenPings(other.getMaximumTimeBetweenPings());
this.setStartupPolicy(other.getStartupPolicy());
this.setManualStart(other.getManualStart());
this.setBindAddress(other.getBindAddress());
synchronized (other.getAllGatewaysLock()) {
Iterator it = other.getGateways().iterator();
while (it.hasNext()) {
Gateway otherGateway = (Gateway)it.next();
AbstractGateway gateway = (AbstractGateway) addGateway(
otherGateway.getId(), otherGateway.getConcurrencyLevel());
gateway.configureFrom(otherGateway);
} // while
} // synchronized
} // synchronized
}
public void start() throws IOException
{
start(true);
}
/**
* Thread group for any created threads
*
* Synchronized via {@link #controlLock}
*/
private final ThreadGroup threadGroup =
LogWriterImpl.createThreadGroup("Gateway Hub Threads", (LogWriterI18n)null);
public void start(boolean startGateways) throws IOException
{
synchronized (this.controlLock) {
if (stopper.cancelInProgress() == null) {
return;
}
// If the current stats are closed due to previously stopping this gateway
// hub, recreate them
if (getStatistics().isClosed()) {
setStatistics(new GatewayHubStats(this._cache.getDistributedSystem(), getId()));
}
((GemFireCacheImpl) getCache()).getPdxRegistry().startingGatewayHub();
setRunning(true);
// Initialize the DistributedLockService
initializeDistributedLockService();
// Add the MembershipListener (this was only a test for failover)
//addGatewayMembershipListener();
// Initialize primary
initializePrimary();
// Start the acceptor if necessary (to allow incoming updates)
if (this._port != GatewayHub.DEFAULT_PORT) {
this._acceptor = new AcceptorImpl(this._port, this._bindAddress,
true /* notify by subscription */, this._socketBufferSize,
this._maximumTimeBetweenPings, this.getCache(),
CacheServer.DEFAULT_MAX_CONNECTIONS,
CacheServer.DEFAULT_MAX_THREADS,
CacheServer.DEFAULT_MAXIMUM_MESSAGE_COUNT,
CacheServer.DEFAULT_MESSAGE_TIME_TO_LIVE, 0, null, null,
false, Collections.EMPTY_LIST,
CacheServer.DEFAULT_TCP_NO_DELAY);
this._acceptor.start();
}
// Start all the Gateways (to allow outgoing updates) if requested
if (startGateways) {
startGateways();
}
this._logger.info(LocalizedStrings.GatewayHubImpl_STARTED__0, this);
}
}
public void startGateways() throws IOException {
synchronized (this.controlLock) {
synchronized (this.allGatewaysLock) {
for (int i = 0; i < allGateways.length; i++) {
AbstractGateway gateway = allGateways[i];
gateway.setPrimary(this._primary);
gateway.start();
}
}
}
}
public void pauseGateways() {
synchronized (this.controlLock) {
synchronized (this.allGatewaysLock) {
for (int i = 0; i < allGateways.length; i ++) {
Gateway gateway = allGateways[i];
gateway.pause();
}
}
}
}
public void resumeGateways() {
synchronized (this.controlLock) {
synchronized (this.allGatewaysLock) {
for (int i = 0; i < allGateways.length; i ++) {
Gateway gateway = allGateways[i];
gateway.resume();
}
}
}
}
public void stopGateways() {
final StoppableWriteLock writeLock = this.distributionRWLock.writeLock();
writeLock.lock();
try {
synchronized (this.controlLock) {
synchronized (this.allGatewaysLock) {
for (int i = 0; i < allGateways.length; i++) {
Gateway gateway = allGateways[i];
gateway.stop();
}
}
}
} finally {
writeLock.unlock();
}
}
public boolean isRunning() {
return this._isRunning;
}
static private volatile boolean emergencyClassesLoaded = false;
/**
* Ensure that AcceptorImpl and GatewayImpl classes get loaded.
*
* @see SystemFailure#loadEmergencyClasses()
*/
public static void loadEmergencyClasses() {
if (emergencyClassesLoaded)
return;
emergencyClassesLoaded = true;
AcceptorImpl.loadEmergencyClasses();
GatewayImpl.loadEmergencyClasses();
}
/**
* Close the acceptor and all the gateways
*
* @see SystemFailure#emergencyClose()
*/
public void emergencyClose() {
this._isRunning = false; // don't synchronize
AcceptorImpl ac = this._acceptor;
if (ac != null) {
ac.emergencyClose();
}
AbstractGateway snap[] = this.allGateways;
for (int i = 0; i < snap.length; i ++) {
allGateways[i].emergencyClose();
}
}
public void stop()
{
final StoppableWriteLock writeLock = this.distributionRWLock.writeLock();
boolean locked = false;
try {
try {
writeLock.lock();
locked = true;
}
catch (CancelException e) {
this._logger.fine(this.toString() + ": System is cancelled; removing resources");
}
synchronized (this.controlLock) {
if (!isRunning()) {
return;
}
setRunning(false);
// Stop the acceptor (to prevent incoming updates)
if (this._acceptor != null) {
try {
this._acceptor.close();
} catch (Exception e) {/* ignore */
}
}
// Shutdown the executor (to prevent outgoing updates)
if (this._executor != null) {
this._executor.shutdown();
}
// Stop all the Gateways (to prevent outgoing updates)
synchronized (this.allGatewaysLock) {
for (int i = 0; i < allGateways.length; i++) {
Gateway gateway = allGateways[i];
try {
gateway.stop();
} catch (Exception e) {/* ignore */
}
}
} // synchronized
try {
DistributedLockService.destroy(getDistributedLockServiceName());
} catch (IllegalArgumentException e) {
// service not found... ignore
}
if (this._lockObtainingThread != null
&& this._lockObtainingThread.isAlive()) {
// wait a while for thread to terminate
try {
this._lockObtainingThread.join(3000);
} catch (InterruptedException ex) {
// ok we allowed our join to be cancelled
// reset interrupt bit so this thread knows it has been interrupted
Thread.currentThread().interrupt();
}
if (this._lockObtainingThread.isAlive()) {
this._logger.info(LocalizedStrings.GatewayHubImpl_COULD_NOT_STOP_LOCK_OBTAINING_THREAD_DURING_GATEWAY_HUB_SHUTDOWN);
}
}
// Close the statistics
if (this._statistics != null) {
this._statistics.close();
}
this._logger.info(LocalizedStrings.GatewayHubImpl_STOPPED__0, this);
} // synchronized
}
finally {
if (locked) {
writeLock.unlock();
}
}
}
public Cache getCache()
{
return this._cache;
}
public boolean isPrimary()
{
return this._primary;
}
@Override
public String toString()
{
StringBuffer buffer = new StringBuffer();
buffer.append(
USE_ASYNCHRONOUS_DISTRIBUTION ? "Asynchronous " : "Synchronous ")
.append(this._primary ? "Primary" : "Secondary").append(
" GatewayHub [id=").append(this._id).append(";bindAddress=")
.append(this._bindAddress).append(";port=").append(
basicGetPort()).append(";startupPolicy=").append(this._startupPolicy).append("]");
return buffer.toString();
}
public String toDetailedString()
{
// Primary GatewayHub [id=HONGKONG-1;port=44444] connected to
// Primary Gateway to LONDON connected to
// [LONDON-1=ELONMAPGEMFP01:44444, LONDON-2=ELONMAPGEMFC01:44444]
// NOTE: getGateways is not thread safe and may throw
// ConcurrentModificationException - below is one example of workaround
StringBuilder sb = new StringBuilder();
sb.append(toString());
List currentGateways = null;
try {
currentGateways = new ArrayList(getGateways()); // should be thread safe
// now
}
catch (ConcurrentModificationException e) {
currentGateways = null;
}
if (currentGateways == null) {
sb.append(" connections are being modified.");
}
else {
boolean and = false;
for (Iterator iter = currentGateways.iterator(); iter.hasNext();) {
Gateway gateway = (Gateway)iter.next();
if (and)
sb.append(" and");
/*
* if (!((GatewayImpl)gateway).isConnected()) // should this be on
* public Gatway interface? sb.append(" not");
*/// is this useful??
sb.append(" connected to ");
sb.append(gateway);
and = true;
}
}
return sb.toString();
}
public void setStartupPolicy(String startupPolicy) throws GatewayException {
synchronized (this.controlLock) {
checkRunning();
if (!startupPolicy.equals(STARTUP_POLICY_NONE)
&& !startupPolicy.equals(STARTUP_POLICY_PRIMARY)
&& !startupPolicy.equals(STARTUP_POLICY_SECONDARY)) {
throw new GatewayException(LocalizedStrings.GatewayHubImpl_AN_UNKNOWN_GATEWAY_HUB_POLICY_0_WAS_SPECIFIED_IT_MUST_BE_ONE_OF_1_2_3.toLocalizedString(new Object[] {startupPolicy, STARTUP_POLICY_NONE, STARTUP_POLICY_PRIMARY, STARTUP_POLICY_SECONDARY}));
}
this._startupPolicy = startupPolicy;
}
}
public String getStartupPolicy() {
return this._startupPolicy;
}
public void setManualStart(boolean manualStart) {
this._manualStart = manualStart;
}
public boolean getManualStart() {
return this._manualStart;
}
/**
* Returns the name of the DistributedLockService used by this
* GatewayHub
*
* @return the name of the DistributedLockService used by this
* GatewayHub
*/
private String getDistributedLockServiceName() {
return getClass().getName() + "-" + getId();
}
// / MembershipListener methods - not currently enabled ///
public void memberJoined(final InternalDistributedMember id) {
}
public void memberDeparted(final InternalDistributedMember id,
final boolean crashed) {
}
public void quorumLost(Set failures, List remaining) {
}
public void memberSuspect(InternalDistributedMember id,
InternalDistributedMember whoSuspected) {
}
// private void addGatewayMembershipListener()
// {
// ((InternalDistributedSystem)this._cache.getDistributedSystem())
// .getDistributionManager().addMembershipListener(this);
// }
public void distribute(EnumListenerEvent operation, EntryEventImpl event) {
// If the event is local (see bug 35831) or an expiration ignore it.
if (event.getOperation().isLocal() || event.getOperation().isExpiration()) {
return;
}
// If this hub is not running, return
if (stopper.cancelInProgress() != null) {
if (this._logger.fineEnabled()) {
this._logger
.fine(this
+ ": Received operation and event to distribute before the gateway hub is running (operation="
+ operation + " event=" + event);
}
return;
}
this._statistics.incEventsReceived();
// Clone the event. This prevents the GatewayEventCallbackArgument from
// being created before the event is distributed to any peer GatewayHubs.
// If it is created and set before distribution, the peer GatewayHub
// will not process it correctly since the GECA is already set.
EntryEventImpl clonedEvent = new EntryEventImpl(event);
try {
//Make sure that the right type of callback argument is set on the event
//Fix for defect # 44398, 44396. Later on modified to fix #46162 as well.
if (clonedEvent.getRawCallbackArgument() != null
&& clonedEvent.getRawCallbackArgument() instanceof GatewaySenderEventCallbackArgument) {
Object callBackArg =
((WrappedCallbackArgument) clonedEvent.getRawCallbackArgument()).getOriginalCallbackArg();
clonedEvent.setRawCallbackArgument(callBackArg);
}
if (USE_ASYNCHRONOUS_DISTRIBUTION) {
// Use the Executor to execute the method in its own thread
boolean calledExecute = false;
try {
final EnumListenerEvent finalOperation = operation;
final EntryEventImpl finalEvent = clonedEvent;
long start = this._statistics.startTime();
this._executor.execute(new Runnable() {
public void run() {
// By default, override the value of the conserve-sockets property
// in gemfire.properties so that queue ordering is preserved.
// If ALLOW_CONSERVE_SOCKETS=true, then the conserve-sockets
// property is used and queue ordering may not be preserved.
if (!ALLOW_CONSERVE_SOCKETS) {
DistributedSystem.setThreadsSocketPolicy(true);
}
// Distribute the event
try {
basicDistribute(finalOperation, finalEvent);
}
catch (CancelException e) {
return; // nothing to do
} finally {
finalEvent.release();
}
}
});
calledExecute = true;
this._statistics.endPut(start);
this._statistics.setQueueSize(this._executorQueue.size());
} catch (RejectedExecutionException e) {
this._logger.warning(LocalizedStrings.GatewayHubImpl_0__DISTRIBUTION_REJECTED, this, e);
} finally {
if (!calledExecute) {
clonedEvent.release();
}
}
} else {
// Execute the method in the same thread as the caller.
//synchronized (this) {
basicDistribute(operation, clonedEvent);
//}
}
} finally {
if (!USE_ASYNCHRONOUS_DISTRIBUTION) {
clonedEvent.release();
}
}
}
/**
* Returns the GatewayHubStats
*
* @return the GatewayHubStats
*/
protected GatewayHubStats getStatistics() {
return this._statistics;
}
protected void setStatistics(GatewayHubStats statistics) {
this._statistics = statistics;
}
/**
* Sets this Gateway to be running or stopped
*
* @param running
* Whether this Gateway is running or stopped
*/
private void setRunning(boolean running) {
synchronized (this.controlLock) {
this._isRunning = running;
}
}
/**
* Returns whether a Gateway with id is already defined by this
* GatewayHub. (thread safe)
*
* @param id
* The id to verify
* @return whether a Gateway with id is already defined by this
* GatewayHub
* @guarded.By {@link #allGatewaysLock}
*/
private boolean alreadyDefinesGateway(String id) {
return findGateway(id) != -1;
}
/** Returns Gateway with id or null if no Gateway is found (thread safe) */
/**
* Return position of gateway in {@link #allGateways}, -1 if not found
*
* @guarded.By {@link #allGatewaysLock}
*/
private int findGateway(String id) {
Gateway snap[] = allGateways; // volatile fetch
int pos;
for (pos = 0; pos < snap.length; pos++) {
Gateway gateway = snap[pos];
if (gateway.getId().equals(id)) {
return pos;
}
}
return -1;
}
/**
* Distributes the event and operation to all known Gateway s
*
* @param operation
* The operation of the event (e.g. AFTER_CREATE, AFTER_UPDATE, etc.)
* @param event
* The event to distribute
*/
public void basicDistribute(EnumListenerEvent operation, EntryEventImpl event) {
final StoppableReentrantReadWriteLock.StoppableReadLock readLock = this.distributionRWLock
.readLock();
if (readLock.tryLock()) {
try {
if (this._logger.fineEnabled()) {
this._logger.fine(this
+ ": About to notify all gateways to perform operation "
+ operation + " for " + event);
}
// Determine which gateways to distribute this event to.
List gatewaysToDistribute = getGatewaysToDistribute(event);
// Distribute the event to those gateways
for (Iterator i = gatewaysToDistribute.iterator(); i.hasNext();) {
AbstractGateway gateway = (AbstractGateway) i.next();
gateway.distribute(operation, event);
}
this._statistics.incEventsProcessed();
this._statistics.setQueueSize(this._executorQueue.size());
} finally {
readLock.unlock();
}
} else {
if (this._logger.fineEnabled()) {
this._logger
.fine(this
+ ": Received operation and event to distribute before the gateway hub is running (operation="
+ operation + " event=" + event);
}
return;
}
}
// private static boolean ONETIME = true;
/**
* Answers the list of Gateway s to which to distribute the
* input EntryEventImpl.
*
* @param event
* The EntryEventImpl to test
* @return the list of Gateway s to which to distribute the
* input EntryEventImpl
*/
private List getGatewaysToDistribute(EntryEventImpl event) {
// The event can be in one of three states:
// - originating in either a peer of this VM or this VM itself. In this
// case, the callback argument will not be an instance of
// GatewayEventCallbackArgument.
// - originating in a client of this VM. In this case, the callback
// argument will be an instance of GatewayEventCallbackArgument, but
// the originating gateway hub id will not be set.
// - originating in another WAN site. In this case, the callback
// argument will be an instance of GatewayEventCallbackArgument with
// all its proper instance variables initialized correctly
List distributeToGateways = null;
// Get the callback argument.
Object callbackArg = event.getRawCallbackArgument();
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Determining recipient gateways for " + event);
}
Region region = event.getRegion();
boolean sendToAllRecipients = false;
boolean isPDXRegion = (region instanceof DistributedRegion && region.getName().equals(PeerTypeRegistration.REGION_NAME));
if (isPDXRegion && event.getOperation().isCreate()
&& !event.isPossibleDuplicate()) {
//Fix for 46572 - It is important that a PDX type
//definition reaches the remote site before any serialized objects
//Therefore we forward the type to the remote site even though
//it is already being sent by the sender
//
//We only send the type on if this DS had not yet seen it. That
//prevents cycles in distribution.
sendToAllRecipients = true;
}
if (callbackArg instanceof GatewayEventCallbackArgument) {
GatewayEventCallbackArgument geca = (GatewayEventCallbackArgument) callbackArg;
if (geca.getOriginatingGatewayHubId() == null
// [bruce] gateway processing moved to pt2, before messaging, so we may get a geca from secondary
// and need to allow it to the queue here
|| geca.getOriginatingGatewayHubId().equals(this._id)) {
/*
* EVENTID TESTING CODE
* System.out.println("GatewayHubImpl.getGatewaysToDistribute CLIENT
* CASE Using event id for " + event.getKey() + ": " +
* geCallbackArg.getOriginalEventId());
*/
// This event is from a client to this VM. If this is the primary,
// initialize the gateway event callback argument correctly and
// distribute this event to all gateways. If this is a secondary,
// the callback argument will be initialized later (only if it is
// actually processed by this secondary). Setting this data now in
// the secondary was causing problems in the primary if it was set
// before the event was serialized to the primary.
if (this._primary) {
geca.setOriginatingGatewayHubId(this._id);
geca.initializeRecipientGateways(getGatewayIds());
}
// Distribute the event to all gateways.
distributeToGateways = getGateways();
} else {
/*
* EVENTID TESTING CODE
* System.out.println("GatewayHubImpl.getGatewaysToDistribute GATEWAY
* CASE Using event id for " + event.getKey() + ": " +
* geCallbackArg.getOriginalEventId());
*/
// This event is from a gateway. For each gateway, check whether any
// of the following match:
// - the originating gateway
// - the sending gateway
// - the original recipient gateways
// If so, don't add the gateway to the list of gateways to which to
// distribute this event. Otherwise, add the gateway to the list.
distributeToGateways = new ArrayList();
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Event is from a gateway with " + geca
+ ". It may not be distributed to all gateways.");
}
for (Iterator i = getGateways().iterator(); i.hasNext();) {
Gateway gateway = (Gateway) i.next();
String gatewayId = gateway.getId();
boolean distribute = true;
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Verifying " + gateway);
}
// Test if this gateway is the originating gateway for this event
if (geca.getOriginatingGatewayHubId().equals(gatewayId)) {
// This event originated in this gateway. Do not distribute it back.
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Event originated in " + gatewayId
+ ". It is being dropped.");
}
distribute = false;
}
//Fix for 46572 - ignore the previous recipients if this is
//a pdx type create.
if(!sendToAllRecipients) {
// Test if this gateway was one of the recipient gateways for this
// event
for (Iterator j = geca.getRecipientGateways().iterator(); j.hasNext();) {
String recipientGatewayId = (String) j.next();
if (recipientGatewayId.equals(gatewayId)) {
if (this._logger.fineEnabled()) {
this._logger.fine(this
+ ": Event has already been sent to gateway " + gatewayId
+ ". It is being dropped.");
}
distribute = false;
break;
}
}
}
// If the gateway passes the above tests, distribute the event to it
if (distribute) {
if (this._logger.fineEnabled()) {
this._logger.fine(this
+ ": Event is being distributed to gateway " + gatewayId);
}
geca.addRecipientGateway(gatewayId);
distributeToGateways.add(gateway);
}
}
}
} else {
// This event is not from a gateway. It is originating in either a peer
// of this VM or this VM itself. Create the GatewayEventCallbackArgument
// and set it in the event.
// if (_logger.fineEnabled() && ONETIME) {
// _logger.fine("normal dispatch", new Exception("stack trace"));
// ONETIME = false;
// }
if (this._logger.fineEnabled()) {
// if (!this._primary) {
// this._logger.fine(this + ": event is not from a gateway. It is being
// distributed to all gateways. cbarg=" + callbackArg, new
// Exception("stack trace"));
// }
// else {
this._logger
.fine(this
+ ": event is not from a gateway. It is being distributed to all gateways.");
// }
}
/*
* EVENTID TESTING CODE
* System.out.println("GatewayHubImpl.getGatewaysToDistribute PEER CASE
* Using event id for " + event.getKey() + ": " +
* event.createEventIdentifier());
*/
GatewayEventCallbackArgument geCallbackArg = new GatewayEventCallbackArgument(
callbackArg, this._id, getGatewayIds(),this.hubType != GatewayHubImpl.GFXD_WAN_HUB);
// new GatewayEventCallbackArgument(
// callbackArg,
// event.createEventIdentifier(),
// this._id,
// getGatewayIds());
event.setCallbackArgument(geCallbackArg);
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": set callback argument: " + geCallbackArg);
}
// Distribute the event to all gateways.
distributeToGateways = getGateways();
}
return distributeToGateways;
}
/**
* Initializes whether this is the primary GatewayHub by
* attempting to get a distributed lock. If the lock is obtained, this is the
* primary GatewayHub; otherwise it is not.
*/
private void initializePrimary() throws GatewayException {
this._primary = false;
//Guarded by control lock, so ok to refer to boolean capableOfBecomingPrimary
if(this.capableOfBecomingPrimary) {
// First, try to obtain the lock in this thread.
// Wait 1 arbitrary second for the lock.
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtaining the lock on " + this._lockToken);
}
this._lockService.lock(this._lockToken, 1000, -1);
String startupPolicy = getStartupPolicy();
if (startupPolicy.equals(STARTUP_POLICY_NONE)
|| startupPolicy.equals(STARTUP_POLICY_PRIMARY)) {
// If the lock is obtained, start this hub as primary; otherwise
// start this hub as secondary.
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
startAsPrimary();
} else {
startAsSecondary();
}
} else if (startupPolicy.equals(STARTUP_POLICY_SECONDARY)) {
// If the lock is obtained, unlock it and continue to try to get it for
// 60 seconds. If at the end of 60 seconds, the lock is still obtained
// by this thread, log a warning and continue as primary; otherwise fall
// through and become secondary.
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
if (this._logger.fineEnabled()) {
this._logger.fine(GatewayHubImpl.this + ": Obtained the lock on "
+ this._lockToken);
}
this._lockService.unlock(this._lockToken);
boolean obtainedTheLock = true;
long currentTimeMs = System.currentTimeMillis();
long endTimeMs = currentTimeMs + STARTUP_POLICY_SECONDARY_WAIT;
boolean continueToGetLock = true;
while (continueToGetLock) {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
}
this._lockService.lock(this._lockToken, 1000, -1);
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
if (System.currentTimeMillis() <= endTimeMs) {
this._lockService.unlock(this._lockToken);
} else {
continueToGetLock = false;
}
} else {
obtainedTheLock = false;
break;
}
}
if (obtainedTheLock) {
startAsPrimary();
} else {
startAsSecondary();
}
} else {
startAsSecondary();
}
}
}else {
startAsSecondary();
}
/*
if (startupPolicy.equals(STARTUP_POLICY_NONE)) {
// If the lock is obtained, set primary to true; otherwise this VM
// is not the primary. Launch a thread to wait indefinitely for the
// lock.
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtained the lock on " + this._lockToken);
}
this._primary = true;
this._logger.info(LocalizedStrings.GatewayHubImpl_0__STARTING_AS_PRIMARY, this);
} else {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Did not obtain the lock on " + this._lockToken);
}
// Launch thread to get the lock
launchLockObtainingThread();
this._logger.info(LocalizedStrings.GatewayHubImpl_0__STARTING_AS_SECONDARY, this);
}
} else if (startupPolicy.equals(STARTUP_POLICY_PRIMARY)) {
// Try to obtain the lock in this thread.
// Wait 1 arbitrary second for the lock.
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtaining the lock on " + this._lockToken);
}
this._lockService.lock(this._lockToken, 1000, -1);
// If the lock is obtained, set primary to true; otherwise fail.
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtained the lock on " + this._lockToken);
}
this._primary = true;
this._logger.info(LocalizedStrings.GatewayHubImpl_0__STARTING_AS_PRIMARY, this);
} else {
String message = LocalizedStrings.GatewayHubImpl_0_FAILED_TO_START_AS_PRIMARY_BECAUSE_THE_LOCK_1_WAS_NOT_OBTAINED.toLocalizedString(new Object[] { this, this._lockToken});
if (this._logger.fineEnabled()) {
this._logger.fine(message);
}
throw new GatewayException(message);
}
} else if (startupPolicy.equals(STARTUP_POLICY_SECONDARY)) {
// Try to obtain the lock in this thread.
// Wait 1 arbitrary second for the lock.
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtaining the lock on " + this._lockToken);
}
this._lockService.lock(this._lockToken, 1000, -1);
// If the lock is obtained, unlock it and continue to try to get it for 60 seconds.
// If at the end of 60 seconds, the lock is still obtained by this thread, fail;
// otherwise fall through and become secondary.
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtained the lock on " + this._lockToken);
}
this._lockService.unlock(this._lockToken);
boolean fail = true;
long currentTimeMs = System.currentTimeMillis();
long endTimeMs = currentTimeMs + STARTUP_POLICY_SECONDARY_WAIT ;
while (System.currentTimeMillis() <= endTimeMs) {
try {Thread.sleep(1000);} catch (InterruptedException e) {}
//System.out.println("Waking up to get the lock again.");
this._lockService.lock(this._lockToken, 1000, -1);
if (this._lockService.isHeldByCurrentThread(this._lockToken)) {
//System.out.println("obtained the lock");
this._lockService.unlock(this._lockToken);
//System.out.println("released the lock");
} else {
fail = false;
break;
}
}
if (fail) {
String message = LocalizedStrings.GatewayHubImpl_0_FAILED_TO_START_AS_SECONDARY_BECAUSE_NO_PRIMARY_STARTED_WITHIN_1_SECONDS.toLocalizedString(new Object[] {this, Integer.valueOf(STARTUP_POLICY_SECONDARY_WAIT/1000));
if (this._logger.fineEnabled()) {
this._logger.fine(message);
}
throw new GatewayException(message);
}
}
// Become secondary.
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Did not obtain the lock on " + this._lockToken);
}
// Launch thread to get the lock
launchLockObtainingThread();
this._logger.info(LocalizedStrings.GatewayHubImpl_0__STARTING_AS_SECONDARY, this);
} else {
// This should have been caught during hub creation.
this._logger.severe(LocalizedStrings.GatewayHubImpl_AN_INVALID_STARTUP_POLICY_WAS_SPECIFIED_THIS_HUB_IS_NOT_STARTED_CORRECTLY);
}
*/
}
/**
* Starts this GatewayHub as primary by setting the appropriate
* instance variable.
*/
private void startAsPrimary() {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Obtained the lock on " + this._lockToken);
}
// Set primary flag to true
this._logger.info(LocalizedStrings.SerialGatewaySenderImpl_0__STARTING_AS_PRIMARY, this);
this._primary = true;
// If secondary startup policy, log a warning
if (this._startupPolicy.equals(STARTUP_POLICY_SECONDARY)) {
this._logger.warning(
LocalizedStrings.SerialGatewaySenderImpl_0_STARTING_AS_PRIMARY_BECAUSE_NO_DESIGNATED_PRIMARY_STARTED_WITHIN_1_SECONDS,
new Object[] {this, Integer.valueOf(STARTUP_POLICY_SECONDARY_WAIT/1000)});
}
}
/**
* Starts this GatewayHub as secondary by setting the
* appropriate instance variable and launching a thread to obtain the lock.
*/
private void startAsSecondary() {
if (this._logger.fineEnabled()) {
this._logger.fine(this + ": Did not obtain the lock on "
+ this._lockToken);
}
// Set primary flag to false
this._logger.info(LocalizedStrings.SerialGatewaySenderImpl_0__STARTING_AS_SECONDARY, this);
this._primary = false;
// If primary startup policy, log a warning
if (this._startupPolicy.equals(STARTUP_POLICY_PRIMARY)) {
this._logger.warning(
LocalizedStrings.SerialGatewaySenderImpl_0_CANNOT_START_AS_PRIMARY_BECAUSE_THE_LOCK_1_WAS_NOT_OBTAINED_IT_WILL_START_AS_SECONDARY_INSTEAD,
new Object[] {this, GatewayHubImpl.this._lockToken});
}
// Launch thread to get the lock
if(capableOfBecomingPrimary) {
launchLockObtainingThread();
}
}
/**
* Initializes the DistributedLockService used by this
* GatewayHub to determine primary / secondary roles for
* failover purposes.
*/
private void initializeDistributedLockService() {
// Get the distributed system
DistributedSystem distributedSystem = this._cache.getDistributedSystem();
// Get the DistributedLockService
String dlsName = getDistributedLockServiceName();
this._lockService = DistributedLockService.getServiceNamed(dlsName);
if (this._lockService == null) {
this._lockService = DLockService.create(dlsName,
(InternalDistributedSystem) distributedSystem, true /* distributed */,
true /* destroyOnDisconnect */, true /* automateFreeResources */);
}
Assert.assertTrue(this._lockService != null);
if (_logger.fineEnabled()) {
_logger.fine(this + ": Obtained DistributedLockService: "
+ this._lockService);
}
}
/**
* Launches a thread that attempts to obtain the distributed lock. This thread
* is launched only by secondary GatewayHubs. When a seconday
* GatewayHub obtains the lock, it becomes the primary and
* tells all of its Gateway's to become primary.
*/
private void launchLockObtainingThread() {
this._lockObtainingThread = new Thread(threadGroup, new Runnable() {
public void run() {
try {
// Attempt to obtain the lock
if (GatewayHubImpl.this._logger.fineEnabled()) {
GatewayHubImpl.this._logger.fine(GatewayHubImpl.this
+ ": Obtaining the lock on " + GatewayHubImpl.this._lockToken);
}
GatewayHubImpl.this._lockService.lock(GatewayHubImpl.this._lockToken,
-1, -1);
if (GatewayHubImpl.this._logger.fineEnabled()) {
GatewayHubImpl.this._logger.fine(GatewayHubImpl.this
+ ": Obtained the lock on " + GatewayHubImpl.this._lockToken);
}
GatewayHubImpl.this._logger.info(
LocalizedStrings.GatewayHubImpl_0_IS_BECOMING_PRIMARY_GATEWAY_HUB,
GatewayHubImpl.this);
// As soon the lock is obtained, set primary
GatewayHubImpl.this._primary = true;
synchronized (allGatewaysLock) {
for (int i = 0; i < allGateways.length; i ++) {
AbstractGateway gateway = allGateways[i];
gateway.becomePrimary();
}
}
}
catch (CancelException e) {
// no action necessary
}
catch (Exception e) {
if (stopper.cancelInProgress() == null) {
GatewayHubImpl.this._logger.severe(
LocalizedStrings.GatewayHubImpl_0_THE_THREAD_TO_OBTAIN_THE_FAILOVER_LOCK_WAS_INTERRUPTED__THIS_GATEWAY_HUB_WILL_NEVER_BECOME_THE_PRIMARY,
GatewayHubImpl.this , e);
}
}
}
}, "Gateway Hub Primary Lock Acquisition Thread");
this._lockObtainingThread.setDaemon(true);
this._lockObtainingThread.start();
}
/*
* (non-Javadoc)
*
* @see com.gemstone.gemfire.cache.util.GatewayHub#getAllGatewaysLock()
*/
public Object getAllGatewaysLock() {
// TODO Auto-generated method stub
return allGatewaysLock;
}
public boolean isDBSynchronizerOrGfxdGatewayHub() {
return this.hubType == GFXD_ASYNC_DBSYNCH_HUB
|| this.hubType == GFXD_WAN_HUB;
}
boolean getGemFireXDStartedHub() {
return this.hubType > NON_GFXD_HUB;
}
public int getHubType() {
return this.hubType;
}
}