/**
* 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.geronimo.connector.outbound;
import java.util.IdentityHashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.ArrayList;
import javax.resource.ResourceException;
import javax.resource.spi.ManagedConnection;
import javax.resource.spi.ManagedConnectionFactory;
/**
* This pool is the most spec-compliant pool. It can be used by itself with no partitioning.
* It is apt to be the slowest pool.
* For each connection request, it synchronizes access to the pool and asks the
* ManagedConnectionFactory for a match from among all managed connections. If none is found,
* it may discard a random existing connection, and creates a new connection.
*
* @version $Rev: 1058794 $ $Date: 2011-01-14 07:25:36 +0800 (Fri, 14 Jan 2011) $
*/
public class SinglePoolMatchAllConnectionInterceptor extends AbstractSinglePoolConnectionInterceptor {
private final Map<ManagedConnection, ManagedConnectionInfo> pool;
public SinglePoolMatchAllConnectionInterceptor(final ConnectionInterceptor next,
int maxSize,
int minSize,
int blockingTimeoutMilliseconds,
int idleTimeoutMinutes) {
super(next, maxSize, minSize, blockingTimeoutMilliseconds, idleTimeoutMinutes);
pool = new IdentityHashMap<ManagedConnection, ManagedConnectionInfo>(maxSize);
}
protected void internalGetConnection(ConnectionInfo connectionInfo) throws ResourceException {
synchronized (pool) {
if (destroyed) {
throw new ResourceException("ManagedConnection pool has been destroyed");
}
if (!pool.isEmpty()) {
ManagedConnectionInfo mci = connectionInfo.getManagedConnectionInfo();
ManagedConnectionFactory managedConnectionFactory = mci.getManagedConnectionFactory();
ManagedConnection matchedMC =
managedConnectionFactory
.matchManagedConnections(pool.keySet(),
mci.getSubject(),
mci.getConnectionRequestInfo());
if (matchedMC != null) {
connectionInfo.setManagedConnectionInfo(pool.get(matchedMC));
pool.remove(matchedMC);
if (log.isTraceEnabled()) {
log.trace("Supplying existing connection from pool " + this + " " + connectionInfo);
}
if (connectionCount < minSize) {
timer.schedule(new FillTask(connectionInfo), 10);
}
return;
}
}
//matching failed or pool is empty
//if pool is at maximum size, pick a cx to kill
if (connectionCount == maxSize) {
log.trace("Pool is at max size but no connections match, picking one to destroy");
Iterator iterator = pool.entrySet().iterator();
ManagedConnectionInfo kill = (ManagedConnectionInfo) ((Map.Entry) iterator.next()).getValue();
iterator.remove();
ConnectionInfo killInfo = new ConnectionInfo(kill);
internalReturn(killInfo, ConnectionReturnAction.DESTROY);
}
next.getConnection(connectionInfo);
connectionCount++;
if (log.isTraceEnabled()) {
log.trace("Supplying new connection from pool " + this + " " + connectionInfo);
}
if (connectionCount < minSize) {
timer.schedule(new FillTask(connectionInfo), 10);
}
}
}
protected void doAdd(ManagedConnectionInfo mci) {
pool.put(mci.getManagedConnection(), mci);
}
protected Object getPool() {
return pool;
}
protected boolean doRemove(ManagedConnectionInfo mci) {
return pool.remove(mci.getManagedConnection()) == null;
}
protected void internalDestroy() {
synchronized (pool) {
for (ManagedConnection managedConnection : pool.keySet()) {
try {
managedConnection.destroy();
} catch (ResourceException ignore) {
}
}
pool.clear();
}
}
public int getIdleConnectionCount() {
synchronized (pool) {
return pool.size();
}
}
protected void transferConnections(int maxSize, int shrinkNow) {
List<ConnectionInfo> killList = new ArrayList<ConnectionInfo>(shrinkNow);
Iterator<Map.Entry<ManagedConnection, ManagedConnectionInfo>> it = pool.entrySet().iterator();
for (int i = 0; i < shrinkNow; i++) {
killList.add(new ConnectionInfo(it.next().getValue()));
}
for (ConnectionInfo killInfo: killList) {
internalReturn(killInfo, ConnectionReturnAction.DESTROY);
}
}
protected void getExpiredManagedConnectionInfos(long threshold, List<ManagedConnectionInfo> killList) {
synchronized (pool) {
for (Iterator<Map.Entry<ManagedConnection, ManagedConnectionInfo>> mcis = pool.entrySet().iterator(); mcis.hasNext(); ) {
ManagedConnectionInfo mci = mcis.next().getValue();
if (mci.getLastUsed() < threshold) {
mcis.remove();
killList.add(mci);
connectionCount--;
}
}
}
}
public void info(StringBuilder s) {
s.append(getClass().getName());
s.append("[minSize=").append(minSize);
s.append(",maxSize=").append(maxSize);
s.append(",idleTimeoutMilliseconds=").append(idleTimeoutMilliseconds);
s.append(",blockingTimeoutMilliseconds=").append(blockingTimeoutMilliseconds).append("]\n");
next.info(s);
}
}