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/*
* $Id$
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2012 OpenLink Software
*
* This project is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; only version 2 of the License, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
package virtuoso.jdbc2;
import java.util.*;
class VirtuosoPoolManager {
#if JDK_VER >= 16
private static WeakHashMap<Object,Object> connPools = new WeakHashMap<Object,Object>(50);
#else
private static WeakHashMap connPools = new WeakHashMap(50);
#endif
private static VirtuosoPoolManager poolMgr = null;
private static Object lock = new Object();
private static ThreadGroup thrGroup = null;
private static Thread poolChecker = null;
private static Thread propertyChecker = null;
protected static VirtuosoPoolManager getInstance() {
synchronized(lock) {
if (poolMgr == null) {
poolMgr = new VirtuosoPoolManager();
thrGroup = new ThreadGroup("Virtuoso Pool Manager");
thrGroup.setDaemon(true);
poolChecker = new Thread(thrGroup, "Virtuoso Pool Checker") {
public void run() {
Object[] poolTmp;
VirtuosoConnectionPoolDataSource pds;
while(true) {
try {
sleep(500L);
} catch (InterruptedException e) { }
synchronized(lock) {
poolTmp = connPools.keySet().toArray();
}
for(int i = 0; i < poolTmp.length; i++) {
pds = (VirtuosoConnectionPoolDataSource)poolTmp[i];
if (pds != null)
pds.checkPool();
poolTmp[i] = null;
}
pds = null;
}
}
};
poolChecker.setDaemon(true);
poolChecker.start();
propertyChecker = new Thread(thrGroup, "Virtuoso Property Checker") {
public void run() {
Object[] poolTmp;
VirtuosoConnectionPoolDataSource pds;
while(true) {
try {
sleep(500L);
} catch (InterruptedException e) { }
synchronized(lock) {
poolTmp = connPools.keySet().toArray();
}
for(int i = 0; i < poolTmp.length; i++) {
pds = (VirtuosoConnectionPoolDataSource)poolTmp[i];
if (pds != null)
pds.checkPropQueue();
poolTmp[i] = null;
}
pds = null;
}
}
};
propertyChecker.setDaemon(true);
propertyChecker.start();
}
}
return poolMgr;
}
protected void addPool(VirtuosoConnectionPoolDataSource pool) {
synchronized(lock) {
connPools.put(pool, null);
}
}
}
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