org.wso2.carbon.caching.impl.CacheManagerFactoryImpl Maven / Gradle / Ivy
The newest version!
/*
* Copyright (c) 2005-2011, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.wso2.carbon.caching.impl;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import javax.cache.CacheManager;
import javax.cache.CacheManagerFactory;
import javax.cache.CachingShutdownException;
/**
* Carbon implementation of java cache.
*
*/
public class CacheManagerFactoryImpl implements CacheManagerFactory, TenantCacheManager {
private static CacheCleanupTask cacheCleanupTask = new CacheCleanupTask();
private ScheduledExecutorService cacheEvictionScheduler;
private static ThreadFactory threadFactory;
private static int threadCount = 0;
static {
threadFactory = new ThreadFactory() {
@Override
public Thread newThread(Runnable runnable) {
Thread th = new Thread(runnable);
th.setName("CacheExpirySchedulerThread-" + threadCount++);
return th;
}
};
}
static void addCacheForMonitoring(CacheImpl cache) {
cacheCleanupTask.addCacheForMonitoring(cache);
}
void removeCacheFromMonitoring(CacheImpl cache) {
cacheCleanupTask.removeCacheFromMonitoring(cache);
}
/**
* Map >
*/
private Map> globalCacheManagerMap =
new ConcurrentHashMap>();
void switchToDistributedMode(){
for (Map cacheManagerMap : globalCacheManagerMap.values()) {
for (CacheManager cacheManager : cacheManagerMap.values()) {
((CarbonCacheManager) cacheManager).switchToDistributedMode();
}
}
}
@Override
public CacheManager getCacheManager(String cacheManagerName) {
String tenantDomain = Util.getTenantDomain();
if(tenantDomain == null){
throw new NullPointerException("Tenant domain has not been set in CarbonContext");
}
Map cacheManagers = globalCacheManagerMap.get(tenantDomain);
if (cacheManagers == null) {
synchronized (tenantDomain.intern()) {
if ((cacheManagers = globalCacheManagerMap.get(tenantDomain)) == null) {
cacheManagers = new ConcurrentHashMap();
globalCacheManagerMap.put(tenantDomain, cacheManagers);
}
}
ensureExpirySchedulerRunning();
}
CacheManager cacheManager = cacheManagers.get(cacheManagerName);
if (cacheManager == null) {
synchronized ((tenantDomain + "*.*" + cacheManagerName).intern()) {
if ((cacheManager = cacheManagers.get(cacheManagerName)) == null) {
cacheManager = new CarbonCacheManager(cacheManagerName, this);
cacheManagers.put(cacheManagerName, cacheManager);
}
}
}
return cacheManager;
}
@Override
public CacheManager getCacheManager(ClassLoader classLoader, String name) {
// Since we have a single CacheManager, we don't have to take the ClassLoader into consideration
return getCacheManager(name);
}
@Override
public void close() throws CachingShutdownException {
String tenantDomain = Util.getTenantDomain();
synchronized (tenantDomain.intern()) {
Map cacheManagers = globalCacheManagerMap.get(tenantDomain);
if (cacheManagers != null) {
for (CacheManager cacheManager : cacheManagers.values()) {
cacheManager.shutdown();
}
cacheManagers.clear();
}
}
if (cacheEvictionScheduler != null) {
cacheEvictionScheduler.shutdown();
}
}
@Override
public boolean close(ClassLoader classLoader) throws CachingShutdownException {
close();
return true;
}
@Override
public boolean close(ClassLoader classLoader, String name) throws CachingShutdownException {
String tenantDomain = Util.getTenantDomain();
Map cacheManagers = globalCacheManagerMap.get(tenantDomain);
CacheManager cacheManager;
if (cacheManagers != null) {
cacheManager = cacheManagers.get(name);
cacheManager.shutdown();
return true;
}
return false;
}
public void removeCacheManager(CarbonCacheManager cacheManager, String tenantDomain) {
Map cacheManagers = globalCacheManagerMap.get(tenantDomain);
if (cacheManagers != null) {
cacheManagers.remove(cacheManager.getName());
}
}
/**
* Remove all the Caches and CacheManagers of the specified tenant
*
* @param tenantDomain The domain of the tenant whose caches need to be removed
*/
public void removeAllCacheManagers(String tenantDomain) {
Map cacheManagers = globalCacheManagerMap.get(tenantDomain);
if (cacheManagers != null) {
for (CacheManager cacheManager : cacheManagers.values()) {
if (((CarbonCacheManager) cacheManager).removeLocalCaches()) {
cacheManagers.remove(cacheManager.getName());
}
}
}
}
public void removeCacheManagerMap(String tenantDomain) {
globalCacheManagerMap.remove(tenantDomain);
}
private void ensureExpirySchedulerRunning() {
if (cacheEvictionScheduler == null || cacheEvictionScheduler.isShutdown() || cacheEvictionScheduler
.isTerminated()) {
int threadCount = calculateExpiryThreadCount();
cacheEvictionScheduler = Executors.newScheduledThreadPool(threadCount, threadFactory);
cacheEvictionScheduler.scheduleWithFixedDelay(cacheCleanupTask, 30, 30, TimeUnit.SECONDS);
}
}
/**
* Determines the optimal thread count for the current system.
* Cache expiry is a CPU bound task. The maximum theoretical performance can be obtained utilizing all available
* cores fully. More threads than available core is counter-productive.
*
* @return
*/
private int calculateExpiryThreadCount() {
int threadCount = Runtime.getRuntime().availableProcessors();
if (threadCount < 1) {
threadCount = 2;
}
return threadCount;
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy