/**
* $RCSfile$
* $Revision: 3144 $
* $Date: 2005-12-01 14:20:11 -0300 (Thu, 01 Dec 2005) $
*
* Copyright (C) 2004-2008 Jive Software. 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 org.jivesoftware.util.cache;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.Lock;
import org.jivesoftware.openfire.XMPPServer;
import org.jivesoftware.openfire.XMPPServerListener;
import org.jivesoftware.openfire.cluster.ClusterEventListener;
import org.jivesoftware.openfire.cluster.ClusterManager;
import org.jivesoftware.openfire.cluster.ClusterNodeInfo;
import org.jivesoftware.openfire.container.Plugin;
import org.jivesoftware.openfire.container.PluginClassLoader;
import org.jivesoftware.openfire.container.PluginManager;
import org.jivesoftware.util.InitializationException;
import org.jivesoftware.util.JiveConstants;
import org.jivesoftware.util.JiveGlobals;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Creates Cache objects. The returned caches will either be local or clustered
* depending on the clustering enabled setting and a user's license.<p>
* <p/>
* When clustered caching is turned on, cache usage statistics for all caches
* that have been created are periodically published to the clustered cache
* named "opt-$cacheStats".
*
*/
public class CacheFactory {
private static final Logger Log = LoggerFactory.getLogger(CacheFactory.class);
public static String LOCAL_CACHE_PROPERTY_NAME = "cache.clustering.local.class";
public static String CLUSTERED_CACHE_PROPERTY_NAME = "cache.clustering.clustered.class";
private static boolean clusteringStarted = false;
private static boolean clusteringStarting = false;
/**
* Storage for all caches that get created.
*/
private static Map<String, Cache> caches = new ConcurrentHashMap<String, Cache>();
private static String localCacheFactoryClass;
private static String clusteredCacheFactoryClass;
private static CacheFactoryStrategy cacheFactoryStrategy;
private static Thread statsThread;
public static final int DEFAULT_MAX_CACHE_SIZE = 1024 * 256;
public static final long DEFAULT_MAX_CACHE_LIFETIME = 6 * JiveConstants.HOUR;
/**
* This map contains property names which were used to store cache configuration data
* in local xml properties in previous versions.
*/
private static final Map<String, String> cacheNames = new HashMap<String, String>();
/**
* Default properties to use for local caches. Default properties can be overridden
* by setting the corresponding system properties.
*/
private static final Map<String, Long> cacheProps = new HashMap<String, Long>();
static {
localCacheFactoryClass = JiveGlobals.getProperty(LOCAL_CACHE_PROPERTY_NAME,
"org.jivesoftware.util.cache.DefaultLocalCacheStrategy");
clusteredCacheFactoryClass = JiveGlobals.getProperty(CLUSTERED_CACHE_PROPERTY_NAME,
"com.jivesoftware.util.cache.CoherenceClusteredCacheFactory");
cacheNames.put("Favicon Hits", "faviconHits");
cacheNames.put("Favicon Misses", "faviconMisses");
cacheNames.put("Group", "group");
cacheNames.put("Group Metadata Cache", "groupMeta");
cacheNames.put("Javascript Cache", "javascript");
cacheNames.put("Last Activity Cache", "lastActivity");
cacheNames.put("Multicast Service", "multicast");
cacheNames.put("Offline Message Size", "offlinemessage");
cacheNames.put("Offline Presence Cache", "offlinePresence");
cacheNames.put("Privacy Lists", "listsCache");
cacheNames.put("Remote Users Existence", "remoteUsersCache");
cacheNames.put("Roster", "username2roster");
cacheNames.put("User", "userCache");
cacheNames.put("Locked Out Accounts", "lockOutCache");
cacheNames.put("VCard", "vcardCache");
cacheNames.put("File Transfer Cache", "fileTransfer");
cacheNames.put("File Transfer", "transferProxy");
cacheNames.put("POP3 Authentication", "pop3");
cacheNames.put("LDAP Authentication", "ldap");
cacheNames.put("Routing Servers Cache", "routeServer");
cacheNames.put("Routing Components Cache", "routeComponent");
cacheNames.put("Routing Users Cache", "routeUser");
cacheNames.put("Routing AnonymousUsers Cache", "routeAnonymousUser");
cacheNames.put("Routing User Sessions", "routeUserSessions");
cacheNames.put("Components Sessions", "componentsSessions");
cacheNames.put("Connection Managers Sessions", "connManagerSessions");
cacheNames.put("Incoming Server Sessions", "incServerSessions");
cacheNames.put("Sessions by Hostname", "sessionsHostname");
cacheNames.put("Secret Keys Cache", "secretKeys");
cacheNames.put("Validated Domains", "validatedDomains");
cacheNames.put("Directed Presences", "directedPresences");
cacheNames.put("Disco Server Features", "serverFeatures");
cacheNames.put("Disco Server Items", "serverItems");
cacheNames.put("Remote Server Configurations", "serversConfigurations");
cacheNames.put("Entity Capabilities", "entityCapabilities");
cacheNames.put("Entity Capabilities Users", "entityCapabilitiesUsers");
cacheNames.put("Clearspace SSO Nonce", "clearspaceSSONonce");
cacheNames.put("PEPServiceManager", "pepServiceManager");
cacheProps.put("cache.fileTransfer.size", 128 * 1024l);
cacheProps.put("cache.fileTransfer.maxLifetime", 1000 * 60 * 10l);
cacheProps.put("cache.multicast.size", 128 * 1024l);
cacheProps.put("cache.multicast.maxLifetime", JiveConstants.DAY);
cacheProps.put("cache.offlinemessage.size", 100 * 1024l);
cacheProps.put("cache.offlinemessage.maxLifetime", JiveConstants.HOUR * 12);
cacheProps.put("cache.pop3.size", 512 * 1024l);
cacheProps.put("cache.pop3.maxLifetime", JiveConstants.HOUR);
cacheProps.put("cache.transferProxy.size", -1l);
cacheProps.put("cache.transferProxy.maxLifetime", 1000 * 60 * 10l);
cacheProps.put("cache.group.size", 1024 * 1024l);
cacheProps.put("cache.group.maxLifetime", JiveConstants.MINUTE * 15);
cacheProps.put("cache.lockOutCache.size", 1024 * 1024l);
cacheProps.put("cache.lockOutCache.maxLifetime", JiveConstants.MINUTE * 15);
cacheProps.put("cache.groupMeta.size", 512 * 1024l);
cacheProps.put("cache.groupMeta.maxLifetime", JiveConstants.MINUTE * 15);
cacheProps.put("cache.javascript.size", 128 * 1024l);
cacheProps.put("cache.javascript.maxLifetime", 3600 * 24 * 10l);
cacheProps.put("cache.ldap.size", 512 * 1024l);
cacheProps.put("cache.ldap.maxLifetime", JiveConstants.HOUR * 2);
cacheProps.put("cache.listsCache.size", 512 * 1024l);
cacheProps.put("cache.offlinePresence.size", 512 * 1024l);
cacheProps.put("cache.lastActivity.size", 128 * 1024l);
cacheProps.put("cache.userCache.size", 512 * 1024l);
cacheProps.put("cache.userCache.maxLifetime", JiveConstants.MINUTE * 30);
cacheProps.put("cache.remoteUsersCache.size", 512 * 1024l);
cacheProps.put("cache.remoteUsersCache.maxLifetime", JiveConstants.MINUTE * 30);
cacheProps.put("cache.vcardCache.size", 512 * 1024l);
cacheProps.put("cache.faviconHits.size", 128 * 1024l);
cacheProps.put("cache.faviconMisses.size", 128 * 1024l);
cacheProps.put("cache.routeServer.size", -1l);
cacheProps.put("cache.routeServer.maxLifetime", -1l);
cacheProps.put("cache.routeComponent.size", -1l);
cacheProps.put("cache.routeComponent.maxLifetime", -1l);
cacheProps.put("cache.routeUser.size", -1l);
cacheProps.put("cache.routeUser.maxLifetime", -1l);
cacheProps.put("cache.routeAnonymousUser.size", -1l);
cacheProps.put("cache.routeAnonymousUser.maxLifetime", -1l);
cacheProps.put("cache.routeUserSessions.size", -1l);
cacheProps.put("cache.routeUserSessions.maxLifetime", -1l);
cacheProps.put("cache.componentsSessions.size", -1l);
cacheProps.put("cache.componentsSessions.maxLifetime", -1l);
cacheProps.put("cache.connManagerSessions.size", -1l);
cacheProps.put("cache.connManagerSessions.maxLifetime", -1l);
cacheProps.put("cache.incServerSessions.size", -1l);
cacheProps.put("cache.incServerSessions.maxLifetime", -1l);
cacheProps.put("cache.sessionsHostname.size", -1l);
cacheProps.put("cache.sessionsHostname.maxLifetime", -1l);
cacheProps.put("cache.secretKeys.size", -1l);
cacheProps.put("cache.secretKeys.maxLifetime", -1l);
cacheProps.put("cache.validatedDomains.size", -1l);
cacheProps.put("cache.validatedDomains.maxLifetime", -1l);
cacheProps.put("cache.directedPresences.size", -1l);
cacheProps.put("cache.directedPresences.maxLifetime", -1l);
cacheProps.put("cache.serverFeatures.size", -1l);
cacheProps.put("cache.serverFeatures.maxLifetime", -1l);
cacheProps.put("cache.serverItems.size", -1l);
cacheProps.put("cache.serverItems.maxLifetime", -1l);
cacheProps.put("cache.serversConfigurations.size", 128 * 1024l);
cacheProps.put("cache.serversConfigurations.maxLifetime", JiveConstants.MINUTE * 30);
cacheProps.put("cache.entityCapabilities.size", -1l);
cacheProps.put("cache.entityCapabilities.maxLifetime", JiveConstants.DAY * 2);
cacheProps.put("cache.entityCapabilitiesUsers.size", -1l);
cacheProps.put("cache.entityCapabilitiesUsers.maxLifetime", JiveConstants.DAY * 2);
cacheProps.put("cache.pluginCacheInfo.size", -1l);
cacheProps.put("cache.pluginCacheInfo.maxLifetime", -1l);
cacheProps.put("cache.clearspaceSSONonce.size", -1l);
cacheProps.put("cache.clearspaceSSONonce.maxLifetime", JiveConstants.MINUTE * 2);
cacheProps.put("cache.pepServiceManager.size", 1024l * 1024 * 10);
cacheProps.put("cache.pepServiceManager.maxLifetime", JiveConstants.MINUTE * 30);
}
private CacheFactory() {
}
/**
* If a local property is found for the supplied name which specifies a value for cache size, it is returned.
* Otherwise, the defaultSize argument is returned.
*
* @param cacheName the name of the cache to look up a corresponding property for.
* @return either the property value or the default value.
*/
public static long getMaxCacheSize(String cacheName) {
return getCacheProperty(cacheName, ".size", DEFAULT_MAX_CACHE_SIZE);
}
/**
* Sets a local property which overrides the maximum cache size as configured in coherence-cache-config.xml for the
* supplied cache name.
* @param cacheName the name of the cache to store a value for.
* @param size the maximum cache size.
*/
public static void setMaxSizeProperty(String cacheName, long size) {
cacheName = cacheName.replaceAll(" ", "");
JiveGlobals.setProperty("cache." + cacheName + ".size", Long.toString(size));
}
public static boolean hasMaxSizeFromProperty(String cacheName) {
return hasCacheProperty(cacheName, ".size");
}
/**
* If a local property is found for the supplied name which specifies a value for cache entry lifetime, it
* is returned. Otherwise, the defaultLifetime argument is returned.
*
* @param cacheName the name of the cache to look up a corresponding property for.
* @return either the property value or the default value.
*/
public static long getMaxCacheLifetime(String cacheName) {
return getCacheProperty(cacheName, ".maxLifetime", DEFAULT_MAX_CACHE_LIFETIME);
}
/**
* Sets a local property which overrides the maximum cache entry lifetime as configured in coherence-cache-config.xml
* for the supplied cache name.
* @param cacheName the name of the cache to store a value for.
* @param lifetime the maximum cache entry lifetime.
*/
public static void setMaxLifetimeProperty(String cacheName, long lifetime) {
cacheName = cacheName.replaceAll(" ", "");
JiveGlobals.setProperty(("cache." + cacheName + ".maxLifetime"), Long.toString(lifetime));
}
public static boolean hasMaxLifetimeFromProperty(String cacheName) {
return hasCacheProperty(cacheName, ".maxLifetime");
}
public static void setCacheTypeProperty(String cacheName, String type) {
cacheName = cacheName.replaceAll(" ", "");
JiveGlobals.setProperty("cache." + cacheName + ".type", type);
}
public static String getCacheTypeProperty(String cacheName) {
cacheName = cacheName.replaceAll(" ", "");
return JiveGlobals.getProperty("cache." + cacheName + ".type");
}
public static void setMinCacheSize(String cacheName, long size) {
cacheName = cacheName.replaceAll(" ", "");
JiveGlobals.setProperty("cache." + cacheName + ".min", Long.toString(size));
}
public static long getMinCacheSize(String cacheName) {
return getCacheProperty(cacheName, ".min", 0);
}
private static long getCacheProperty(String cacheName, String suffix, long defaultValue) {
// First check if user is overwriting default value using a system property for the cache name
String propName = "cache." + cacheName.replaceAll(" ", "") + suffix;
String sizeProp = JiveGlobals.getProperty(propName);
if (sizeProp == null && cacheNames.containsKey(cacheName)) {
// No system property was found for the cache name so try now with short name
propName = "cache." + cacheNames.get(cacheName) + suffix;
sizeProp = JiveGlobals.getProperty(propName);
}
if (sizeProp != null) {
try {
return Long.parseLong(sizeProp);
}
catch (NumberFormatException nfe) {
Log.warn("Unable to parse " + propName + " using default value.");
}
}
// Check if there is a default size value for this cache
Long defaultSize = cacheProps.get(propName);
return defaultSize == null ? defaultValue : defaultSize;
}
private static boolean hasCacheProperty(String cacheName, String suffix) {
// First check if user is overwriting default value using a system property for the cache name
String propName = "cache." + cacheName.replaceAll(" ", "") + suffix;
String sizeProp = JiveGlobals.getProperty(propName);
if (sizeProp == null && cacheNames.containsKey(cacheName)) {
// No system property was found for the cache name so try now with short name
propName = "cache." + cacheNames.get(cacheName) + suffix;
sizeProp = JiveGlobals.getProperty(propName);
}
if (sizeProp != null) {
try {
Long.parseLong(sizeProp);
return true;
}
catch (NumberFormatException nfe) {
Log.warn("Unable to parse " + propName + " using default value.");
}
}
return false;
}
/**
* Returns an array of all caches in the system.
* @return an array of all caches in the system.
*/
public static Cache[] getAllCaches() {
List<Cache> values = new ArrayList<Cache>();
for (Cache cache : caches.values()) {
values.add(cache);
}
return values.toArray(new Cache[values.size()]);
}
/**
* Returns the named cache, creating it as necessary.
*
* @param name the name of the cache to create.
* @return the named cache, creating it as necessary.
*/
@SuppressWarnings("unchecked")
public static synchronized <T extends Cache> T createCache(String name) {
T cache = (T) caches.get(name);
if (cache != null) {
return cache;
}
cache = (T) cacheFactoryStrategy.createCache(name);
return wrapCache(cache, name);
}
/**
* Destroys the cache for the cache name specified.
*
* @param name the name of the cache to destroy.
*/
public static void destroyCache(String name) {
Cache cache = caches.remove(name);
if (cache != null) {
cacheFactoryStrategy.destroyCache(cache);
}
}
/**
* Returns an existing {@link java.util.concurrent.locks.Lock} on the specified key or creates a new one
* if none was found. This operation is thread safe. Successive calls with the same key may or may not
* return the same {@link java.util.concurrent.locks.Lock}. However, different threads asking for the
* same Lock at the same time will get the same Lock object.<p>
*
* The supplied cache may or may not be used depending whether the server is running on cluster mode
* or not. When not running as part of a cluster then the lock will be unrelated to the cache and will
* only be visible in this JVM.
*
* @param key the object that defines the visibility or scope of the lock.
* @param cache the cache used for holding the lock.
* @return an existing lock on the specified key or creates a new one if none was found.
*/
public static Lock getLock(Object key, Cache cache) {
return cacheFactoryStrategy.getLock(key, cache);
}
@SuppressWarnings("unchecked")
private static <T extends Cache> T wrapCache(T cache, String name) {
cache = (T) new CacheWrapper(cache);
cache.setName(name);
caches.put(name, cache);
return cache;
}
/**
* Returns true if clustering is installed and can be used by this JVM
* to join a cluster. A false value could mean that either clustering
* support is not available or the license does not allow to have more
* than 1 cluster node.
*
* @return true if clustering is installed and can be used by
* this JVM to join a cluster.
*/
public static boolean isClusteringAvailable() {
return getMaxClusterNodes() > 1;
}
/**
* Returns true is clustering is currently being started. Once the cluster
* is started or failed to be started this value will be false.
*
* @return true is clustering is currently being started.
*/
public static boolean isClusteringStarting() {
return clusteringStarting;
}
/**
* Returns true if this node is currently a member of a cluster. The last step of application
* initialization is to join a cluster, so this method returns false during most of application startup.
*
* @return true if this node is currently a member of a cluster.
*/
public static boolean isClusteringStarted() {
return clusteringStarted;
}
/**
* Returns a byte[] that uniquely identifies this member within the cluster or <tt>null</tt>
* when not in a cluster.
*
* @return a byte[] that uniquely identifies this member within the cluster or null when not in a cluster.
*/
public static byte[] getClusterMemberID() {
return cacheFactoryStrategy.getClusterMemberID();
}
public synchronized static void clearCaches() {
for (String cacheName : caches.keySet()) {
Cache cache = caches.get(cacheName);
cache.clear();
}
}
/**
* Returns a byte[] that uniquely identifies this senior cluster member or <tt>null</tt>
* when not in a cluster.
*
* @return a byte[] that uniquely identifies this senior cluster member or null when not in a cluster.
*/
public static byte[] getSeniorClusterMemberID() {
return cacheFactoryStrategy.getSeniorClusterMemberID();
}
/**
* Returns true if this member is the senior member in the cluster. If clustering
* is not enabled, this method will also return true. This test is useful for
* tasks that should only be run on a single member in a cluster.
*
* @return true if this cluster member is the senior or if clustering is not enabled.
*/
public static boolean isSeniorClusterMember() {
return cacheFactoryStrategy.isSeniorClusterMember();
}
/**
* Returns basic information about the current members of the cluster or an empty
* collection if not running in a cluster.
*
* @return information about the current members of the cluster or an empty
* collection if not running in a cluster.
*/
public static Collection<ClusterNodeInfo> getClusterNodesInfo() {
return cacheFactoryStrategy.getClusterNodesInfo();
}
/**
* Returns the maximum number of cluster members allowed. A value of 0 or 1 will
* be returned when clustering is not allowed.
*
* @return the maximum number of cluster members allowed or 0 or 1 if clustering is not allowed.
*/
public static int getMaxClusterNodes() {
try {
CacheFactoryStrategy cacheFactory = (CacheFactoryStrategy) Class.forName(
clusteredCacheFactoryClass, true,
getClusteredCacheStrategyClassLoader()).newInstance();
return cacheFactory.getMaxClusterNodes();
} catch (ClassNotFoundException e) {
// Do nothing
} catch (Exception e) {
Log.error("Error instantiating clustered cache factory", e);
}
return 0;
}
/**
* Invokes a task on other cluster members in an asynchronous fashion. The task will not be
* executed on the local cluster member. If clustering is not enabled, this method
* will do nothing.
*
* @param task the task to be invoked on all other cluster members.
*/
public static void doClusterTask(final ClusterTask task) {
cacheFactoryStrategy.doClusterTask(task);
}
/**
* Invokes a task on a given cluster member in an asynchronous fashion. If clustering is not enabled,
* this method will do nothing.
*
* @param task the task to be invoked on the specified cluster member.
* @param nodeID the byte array that identifies the target cluster member.
* @throws IllegalStateException if requested node was not found or not running in a cluster.
*/
public static void doClusterTask(final ClusterTask task, byte[] nodeID) {
cacheFactoryStrategy.doClusterTask(task, nodeID);
}
/**
* Invokes a task on other cluster members synchronously and returns the result as a Collection
* (method will not return until the task has been executed on each cluster member).
* The task will not be executed on the local cluster member. If clustering is not enabled,
* this method will return an empty collection.
*
* @param task the ClusterTask object to be invoked on all other cluster members.
* @param includeLocalMember true to run the task on the local member, false otherwise
* @return collection with the result of the execution.
*/
public static Collection<Object> doSynchronousClusterTask(ClusterTask task, boolean includeLocalMember) {
return cacheFactoryStrategy.doSynchronousClusterTask(task, includeLocalMember);
}
/**
* Invokes a task on a given cluster member synchronously and returns the result of
* the remote operation. If clustering is not enabled, this method will return null.
*
* @param task the ClusterTask object to be invoked on a given cluster member.
* @param nodeID the byte array that identifies the target cluster member.
* @return result of remote operation or null if operation failed or operation returned null.
* @throws IllegalStateException if requested node was not found or not running in a cluster.
*/
public static Object doSynchronousClusterTask(ClusterTask task, byte[] nodeID) {
return cacheFactoryStrategy.doSynchronousClusterTask(task, nodeID);
}
public static synchronized void initialize() throws InitializationException {
try {
cacheFactoryStrategy = (CacheFactoryStrategy) Class
.forName(localCacheFactoryClass).newInstance();
}
catch (InstantiationException e) {
throw new InitializationException(e);
}
catch (IllegalAccessException e) {
throw new InitializationException(e);
}
catch (ClassNotFoundException e) {
throw new InitializationException(e);
}
}
private static ClassLoader getClusteredCacheStrategyClassLoader() {
PluginManager pluginManager = XMPPServer.getInstance().getPluginManager();
Plugin plugin = pluginManager.getPlugin("clustering");
if (plugin == null) {
plugin = pluginManager.getPlugin("enterprise");
}
PluginClassLoader pluginLoader = pluginManager.getPluginClassloader(plugin);
if (pluginLoader != null) {
return pluginLoader;
}
else {
Log.debug("CacheFactory - Unable to find a Plugin that provides clustering support.");
return Thread.currentThread().getContextClassLoader();
}
}
public static void startClustering() {
clusteringStarted = false;
clusteringStarting = true;
try {
cacheFactoryStrategy = (CacheFactoryStrategy) Class.forName(clusteredCacheFactoryClass, true,
getClusteredCacheStrategyClassLoader())
.newInstance();
clusteringStarted = cacheFactoryStrategy.startCluster();
}
catch (Exception e) {
Log.error("Unable to start clustering - continuing in local mode", e);
}
if (!clusteringStarted) {
// Revert to local cache factory if cluster fails to start
try {
cacheFactoryStrategy = (CacheFactoryStrategy) Class.forName(localCacheFactoryClass).newInstance();
} catch (Exception e) {
Log.error("Fatal error - Failed to join the cluster and failed to use local cache", e);
}
}
else {
if (statsThread == null) {
// Start a timing thread with 1 second of accuracy.
statsThread = new Thread("Cache Stats") {
private volatile boolean destroyed = false;
@Override
public void run() {
XMPPServer.getInstance().addServerListener(new XMPPServerListener() {
public void serverStarted() {}
public void serverStopping() {
destroyed = true;
}
});
ClusterManager.addListener(new ClusterEventListener() {
public void joinedCluster() {}
public void joinedCluster(byte[] nodeID) {}
public void leftCluster() {
destroyed = true;
ClusterManager.removeListener(this);
}
public void leftCluster(byte[] nodeID) {}
public void markedAsSeniorClusterMember() {}
});
// Run the timer indefinitely.
while (!destroyed && ClusterManager.isClusteringEnabled()) {
// Publish cache stats for this cluster node (assuming clustering is
// enabled and there are stats to publish).
try {
cacheFactoryStrategy.updateCacheStats(caches);
}
catch (Exception e) {
Log.error(e.getMessage(), e);
}
try {
// Sleep 10 seconds.
sleep(10000);
}
catch (InterruptedException ie) {
// Ignore.
}
}
statsThread = null;
Log.debug("Cache stats thread terminated.");
}
};
statsThread.setDaemon(true);
statsThread.start();
}
}
clusteringStarting = false;
}
public static void stopClustering() {
try {
// Stop the cluster
cacheFactoryStrategy.stopCluster();
// Set the strategy to local
cacheFactoryStrategy = (CacheFactoryStrategy) Class.forName(localCacheFactoryClass)
.newInstance();
clusteringStarted = false;
}
catch (Exception e) {
Log.error("Unable to stop clustering - continuing in clustered mode", e);
}
}
/**
* Notification message indicating that this JVM has joined a cluster.
*/
public static void joinedCluster() {
// Loop through local caches and switch them to clustered cache (migrate content)
for (Cache cache : getAllCaches()) {
CacheWrapper cacheWrapper = ((CacheWrapper) cache);
Cache clusteredCache = cacheFactoryStrategy.createCache(cacheWrapper.getName());
cacheWrapper.setWrappedCache(clusteredCache);
}
}
/**
* Notification message indicating that this JVM has left the cluster.
*/
public static void leftCluster() {
// Loop through clustered caches and change them to local caches (migrate content)
try {
cacheFactoryStrategy = (CacheFactoryStrategy) Class.forName(localCacheFactoryClass).newInstance();
for (Cache cache : getAllCaches()) {
CacheWrapper cacheWrapper = ((CacheWrapper) cache);
Cache standaloneCache = cacheFactoryStrategy.createCache(cacheWrapper.getName());
cacheWrapper.setWrappedCache(standaloneCache);
}
} catch (Exception e) {
Log.error("Error reverting caches to local caches", e);
}
}
}