/*
* JBoss, Home of Professional Open Source
* Copyright 2006, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags.
* See the copyright.txt in the distribution for a
* full listing of individual contributors.
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License, v. 2.1.
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public License,
* v.2.1 along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
* (C) 2007,
* @author JBoss Inc.
*/
package com.arjuna.ats.internal.arjuna.recovery;
import java.util.*;
import java.io.PrintWriter;
import java.text.*;
import com.arjuna.ats.arjuna.common.Uid;
import com.arjuna.ats.arjuna.common.arjPropertyManager;
import com.arjuna.ats.arjuna.objectstore.ObjectStore;
import com.arjuna.common.util.propertyservice.PropertyManager;
import com.arjuna.ats.arjuna.recovery.ExpiryScanner;
import com.arjuna.ats.arjuna.recovery.RecoveryEnvironment;
import com.arjuna.ats.arjuna.state.InputObjectState;
import com.arjuna.ats.arjuna.state.OutputObjectState;
import com.arjuna.ats.arjuna.coordinator.TxControl;
import com.arjuna.ats.arjuna.logging.tsLogger;
import com.arjuna.ats.arjuna.logging.FacilityCode;
import com.arjuna.common.util.logging.*;
/**
* This class is a plug-in module for the recovery manager. This class is
* responsible for the removing transaction status manager items that are too
* old.
*/
public class ExpiredTransactionScanner implements ExpiryScanner
{
/**
* @message com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_1
* [com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_1] -
* ExpiredTransactionScanner created, with expiry time of {0} seconds
* @message com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_2
* [com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_2] -
* ExpiredTransactionScanner - exception during attempted move {0} {1}
* @message com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_3
* [com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_3] -
* ExpiredTransactionScanner - could not moved log {0}
* @message com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_4
* [com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_4] -
* ExpiredTransactionScanner - log {0} is assumed complete and will be
* moved.
*/
public ExpiredTransactionScanner(String typeName, String movedTypeName)
{
_objectStore = TxControl.getStore();
_typeName = typeName;
_movedTypeName = movedTypeName;
}
/**
* This is called periodically by the RecoveryManager
*/
public void scan()
{
boolean initialScan = false;
if (_scanM == null)
{
_scanM = new Hashtable();
initialScan = true;
}
try
{
InputObjectState uids = new InputObjectState();
// take a snapshot of the log
if (_objectStore.allObjUids(_typeName, uids))
{
Uid theUid = new Uid(Uid.nullUid());
boolean endOfUids = false;
while (!endOfUids)
{
// extract a uid
theUid.unpack(uids);
if (theUid.equals(Uid.nullUid()))
endOfUids = true;
else
{
Uid newUid = new Uid(theUid);
if (initialScan)
_scanM.put(newUid, newUid);
else
{
if (!_scanM.contains(newUid))
{
if (_scanN == null)
_scanN = new Hashtable();
_scanN.put(newUid, newUid);
}
else
// log is present in this iteration, so move it
{
if (tsLogger.arjLoggerI18N.isInfoEnabled())
tsLogger.arjLoggerI18N
.info(
"com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_4",
new Object[]
{ newUid });
try
{
InputObjectState state = _objectStore
.read_committed(newUid, _typeName);
if (state != null) // just in case recovery
// kicked-in
{
boolean moved = _objectStore
.write_committed(newUid,
_movedTypeName,
new OutputObjectState(
state));
if (!moved)
{
tsLogger.arjLoggerI18N
.warn(
"com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionStatusManagerScanner_3",
new Object[]
{ newUid });
}
else
_objectStore.remove_committed(newUid, _typeName);
}
}
catch (Exception ex)
{
tsLogger.arjLoggerI18N
.warn(
"com.arjuna.ats.internal.arjuna.recovery.ExpiredTransactionScanner_2",
new Object[]
{ newUid, ex });
_scanN.put(newUid, newUid);
}
}
}
}
}
if (_scanN != null)
{
_scanM = _scanN;
_scanN = null;
}
}
}
catch (Exception e)
{
// end of uids!
}
}
public boolean toBeUsed()
{
return true;
}
private String _typeName;
private String _movedTypeName;
private ObjectStore _objectStore;
private Hashtable _scanM = null;
private Hashtable _scanN = null;
}