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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.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import com.gemstone.gemfire.DataSerializer;
import com.gemstone.gemfire.Instantiator;
import com.gemstone.gemfire.cache.Region;
import com.gemstone.gemfire.cache.client.Pool;
import com.gemstone.gemfire.cache.client.PoolFactory;
import com.gemstone.gemfire.cache.client.PoolManager;
import com.gemstone.gemfire.cache.client.internal.BridgePoolImpl;
import com.gemstone.gemfire.cache.client.internal.PoolImpl;
import com.gemstone.gemfire.cache.client.internal.RegisterDataSerializersOp;
import com.gemstone.gemfire.cache.client.internal.RegisterInstantiatorsOp;
import com.gemstone.gemfire.distributed.internal.InternalDistributedSystem;
import com.gemstone.gemfire.internal.InternalDataSerializer;
import com.gemstone.gemfire.internal.InternalDataSerializer.SerializerAttributesHolder;
import com.gemstone.gemfire.internal.InternalInstantiator;
import com.gemstone.gemfire.internal.InternalInstantiator.InstantiatorAttributesHolder;
import com.gemstone.gemfire.internal.cache.xmlcache.CacheCreation;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;
/**
* Implementation used by PoolManager.
*
* @author darrel
* @since 5.7
*
*/
public class PoolManagerImpl {
private final static PoolManagerImpl impl = new PoolManagerImpl(true);
public static PoolManagerImpl getPMI() {
PoolManagerImpl result = CacheCreation.getCurrentPoolManager();
if (result == null) {
result = impl;
}
return result;
}
private volatile Map pools = Collections.emptyMap();
private volatile Iterator> itrForEmergencyClose = null;
private final Object poolLock = new Object();
/**
* True if this manager is a normal one owned by the PoolManager.
* False if this is a special one owned by a xml CacheCreation.
*/
private final boolean normalManager;
/**
* @param addListener will be true if the is a real manager that needs to
* register a connect listener. False if it is a fake
* manager used internally by the XML code.
*/
public PoolManagerImpl(boolean addListener) {
this.normalManager = addListener;
}
/**
* Returns true if this is a normal manager; false if it is a fake one used
* for xml parsing.
*/
public boolean isNormal() {
return this.normalManager;
}
/**
* Creates a new {@link PoolFactory pool factory},
* which is used to configure and create new {@link Pool}s.
* @return the new pool factory
*/
public PoolFactory createFactory() {
return new PoolFactoryImpl(this);
}
/**
* Find by name an existing connection pool returning
* the existing pool or null if it does not exist.
* @param name the name of the connection pool
* @return the existing connection pool or null if it does not exist.
*/
public Pool find(String name) {
return this.pools.get(name);
}
/**
* Set the keep alive flag before closing. Only for use with the deprecated
* BridgeWriter/Loader code. A BridgeWriter is automatically
* closed then the last region is disconnected from it,
* so we need to mark the connections as keep alive
* before we close the regions that use the bridge writer/loader
*
* @param keepAlive
*/
public static void setKeepAlive(boolean keepAlive) {
for(Iterator itr = PoolManager.getAll().values().iterator(); itr.hasNext(); ) {
Pool nextPool = itr.next();
if(nextPool instanceof BridgePoolImpl) {
BridgePoolImpl bridgePool = (BridgePoolImpl) nextPool;
bridgePool.setKeepAlive(keepAlive);
}
}
}
/**
* Destroys all created pool in this manager.
*/
public void close(boolean keepAlive) {
// destroying connection pools
synchronized(poolLock) {
for (Iterator> itr = pools.entrySet().iterator(); itr.hasNext(); ) {
Map.Entry entry = itr.next();
PoolImpl pool = (PoolImpl)entry.getValue();
pool.basicDestroy(keepAlive);
}
pools = Collections.emptyMap();
itrForEmergencyClose = null;
}
}
/**
* @return a copy of the Pools Map
*/
public Map getMap() {
//debugStack("getMap: " + this.pools);
return new HashMap(this.pools);
}
/**
* This is called by {@link PoolImpl#create}
* @throws IllegalStateException if a pool with same name is already registered.
*/
public void register(Pool pool) {
synchronized (this.poolLock) {
Map copy = new HashMap(pools);
String name = pool.getName();
//debugStack("register pool=" + name);
Object old = copy.put(name, pool);
if (old != null) {
throw new IllegalStateException("A pool named \"" + name
+ "\" already exists.");
}
this.pools = Collections.unmodifiableMap(copy);
this.itrForEmergencyClose = copy.entrySet().iterator();
}
}
/**
* This is called by {@link Pool#destroy(boolean)}
* @return true if pool unregistered from cache; false if someone else already did it
*/
public boolean unregister(Pool pool) {
synchronized(this.poolLock) {
Map copy = new HashMap(pools);
String name = pool.getName();
//debugStack("unregister pool=" + name);
Object rmPool = copy.remove(name);
if (rmPool == null || rmPool != pool) {
return false;
} else {
this.pools = Collections.unmodifiableMap(copy);
this.itrForEmergencyClose = copy.entrySet().iterator();
return true;
}
}
}
@Override
public String toString() {
StringBuffer result = new StringBuffer();
result.append(super.toString())
.append("-")
.append(this.normalManager? "normal":"xml");
return result.toString();
}
/**
* @param xmlPoolsOnly if true then only call readyForEvents on pools declared in XML.
*/
public static void readyForEvents(InternalDistributedSystem system, boolean xmlPoolsOnly) {
boolean foundDurablePool = false;
Map pools = PoolManager.getAll();
for(Iterator itr = pools.values().iterator(); itr.hasNext(); ) {
PoolImpl p = (PoolImpl) itr.next();
if (p.isDurableClient()) {
//TODO - handle an exception and attempt on all pools?
foundDurablePool = true;
if (!xmlPoolsOnly || p.getDeclaredInXML()) {
p.readyForEvents(system);
}
}
}
if (pools.size() > 0 && !foundDurablePool) {
throw new IllegalStateException(LocalizedStrings.PoolManagerImpl_ONLY_DURABLE_CLIENTS_SHOULD_CALL_READYFOREVENTS.toLocalizedString());
}
}
/**
* @param instantiator
*/
public static void allPoolsRegisterInstantiator(Instantiator instantiator) {
Instantiator[] instantiators = new Instantiator[1];
instantiators[0] = instantiator;
for(Iterator itr = PoolManager.getAll().values().iterator(); itr.hasNext(); ) {
PoolImpl next = (PoolImpl) itr.next();
try {
EventID eventId = InternalInstantiator.generateEventId();
if(eventId == null) {
//cache must not exist, do nothing
} else {
RegisterInstantiatorsOp.execute(next, instantiators, InternalInstantiator.generateEventId());
}
} catch(RuntimeException e) {
next.getLoggerI18n().warning(LocalizedStrings.PoolmanagerImpl_ERROR_REGISTERING_INSTANTIATOR_ON_POOL, e);
} finally {
next.releaseThreadLocalConnection();
}
}
}
public static void allPoolsRegisterInstantiator(InstantiatorAttributesHolder holder) {
InstantiatorAttributesHolder[] holders = new InstantiatorAttributesHolder[1];
holders[0] = holder;
for(Iterator itr = PoolManager.getAll().values().iterator(); itr.hasNext(); ) {
PoolImpl next = (PoolImpl) itr.next();
try {
EventID eventId = InternalInstantiator.generateEventId();
if(eventId == null) {
//cache must not exist, do nothing
} else {
RegisterInstantiatorsOp.execute(next, holders, InternalInstantiator.generateEventId());
}
} catch(RuntimeException e) {
next.getLoggerI18n().warning(LocalizedStrings.PoolmanagerImpl_ERROR_REGISTERING_INSTANTIATOR_ON_POOL, e);
} finally {
next.releaseThreadLocalConnection();
}
}
}
public static void allPoolsRegisterDataSerializers(
DataSerializer dataSerializer) {
DataSerializer[] dataSerializers = new DataSerializer[1];
dataSerializers[0] = dataSerializer;
for (Iterator itr = PoolManager.getAll().values().iterator(); itr
.hasNext();) {
PoolImpl next = (PoolImpl)itr.next();
try {
EventID eventId = (EventID)dataSerializer.getEventId();
if (eventId == null) {
eventId = InternalDataSerializer.generateEventId();
}
if (eventId == null) {
// cache must not exist, do nothing
}
else {
RegisterDataSerializersOp.execute(next, dataSerializers, eventId);
}
}
catch (RuntimeException e) {
next
.getLoggerI18n()
.warning(
LocalizedStrings.PoolmanagerImpl_ERROR_REGISTERING_INSTANTIATOR_ON_POOL,
e);
}
finally {
next.releaseThreadLocalConnection();
}
}
}
public static void allPoolsRegisterDataSerializers(
SerializerAttributesHolder holder) {
SerializerAttributesHolder[] holders = new SerializerAttributesHolder[1];
holders[0] = holder;
for (Iterator itr = PoolManager.getAll().values().iterator(); itr
.hasNext();) {
PoolImpl next = (PoolImpl)itr.next();
try {
EventID eventId = (EventID)holder.getEventId();
if (eventId == null) {
eventId = InternalDataSerializer.generateEventId();
}
if (eventId == null) {
// cache must not exist, do nothing
} else {
RegisterDataSerializersOp.execute(next, holders, eventId);
}
} catch (RuntimeException e) {
next.getLoggerI18n().warning(
LocalizedStrings.PoolmanagerImpl_ERROR_REGISTERING_INSTANTIATOR_ON_POOL,
e);
} finally {
next.releaseThreadLocalConnection();
}
}
}
public static void emergencyClose() {
if(impl == null) {
return;
}
Iterator> itr= impl.itrForEmergencyClose;
if(itr == null) {
return;
}
while(itr.hasNext()) {
Entry next = itr.next();
((PoolImpl) next.getValue()).emergencyClose();
}
}
public static void loadEmergencyClasses() {
PoolImpl.loadEmergencyClasses();
}
public Pool find(Region region) {
return find(region.getAttributes().getPoolName());
}
}