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/*
* 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) 2005-2006,
* @author JBoss Inc.
*/
/*
* Copyright (C) 2000, 2001,
*
* Hewlett-Packard Arjuna Labs,
* Newcastle upon Tyne,
* Tyne and Wear,
* UK.
*
* $Id: TORecoveryModule.java 2342 2006-03-30 13:06:17Z $
*/
package com.arjuna.ats.internal.txoj.recovery;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Hashtable;
import com.arjuna.ats.arjuna.common.Uid;
import com.arjuna.ats.arjuna.exceptions.ObjectStoreException;
import com.arjuna.ats.arjuna.objectstore.ObjectStoreAPI;
import com.arjuna.ats.arjuna.objectstore.StateStatus;
import com.arjuna.ats.arjuna.objectstore.StoreManager;
import com.arjuna.ats.arjuna.recovery.RecoveryModule;
import com.arjuna.ats.arjuna.state.InputObjectState;
import com.arjuna.ats.internal.arjuna.common.UidHelper;
import com.arjuna.ats.txoj.logging.txojLogger;
/**
* This class is a plug-in module for the recovery manager. This class is
* responsible for the recovery of Transactional Objects (aka AIT objects),
* i.e., objects that derive from LockManager and StateManager.
*/
public class TORecoveryModule implements RecoveryModule
{
/**
* Create the module to scan in the default location for object states. Any
* modifications to locations must occur in the properties file.
*/
@SuppressWarnings("unchecked")
public TORecoveryModule()
{
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TORecoveryModule created");
}
/*
* Where are TO's stored. Default.
*/
_objectStore = StoreManager.getTxOJStore();
}
public void periodicWorkFirstPass ()
{
if(txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TORecoveryModule - first pass");
}
// Build a hashtable of uncommitted transactional objects
_uncommittedTOTable = new Hashtable();
try
{
InputObjectState types = new InputObjectState();
// find all the types of transactional object (in this ObjectStore)
if (_objectStore.allTypes(types))
{
String theName = null;
try
{
boolean endOfList = false;
while (!endOfList)
{
// extract a type
theName = types.unpackString();
if (theName.compareTo("") == 0)
endOfList = true;
else
{
InputObjectState uids = new InputObjectState();
// find the uids of anything with an uncommitted
// entry in the object store
if (_objectStore.allObjUids(theName, uids,
StateStatus.OS_UNCOMMITTED))
{
Uid theUid = null;
try
{
boolean endOfUids = false;
while (!endOfUids)
{
// extract a uid
theUid = UidHelper.unpackFrom(uids);
if (theUid.equals(Uid.nullUid()))
endOfUids = true;
else
{
String newTypeString = new String(
theName);
Uid newUid = new Uid(theUid);
_uncommittedTOTable.put(newUid,newTypeString);
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TO currently uncommitted "+newUid+" is a "+newTypeString);
}
}
}
}
catch (Exception e)
{
// end of uids!
}
}
}
}
}
catch (IOException ex)
{
// nothing there.
}
catch (Exception e)
{
txojLogger.i18NLogger.warn_recovery_TORecoveryModule_5(e);
}
}
}
catch (Exception e)
{
txojLogger.i18NLogger.warn_recovery_TORecoveryModule_5(e);
}
}
public void periodicWorkSecondPass ()
{
if(txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TORecoveryModule - second pass");
}
Enumeration uncommittedObjects = _uncommittedTOTable.keys();
while (uncommittedObjects.hasMoreElements())
{
Uid objUid = (Uid) uncommittedObjects.nextElement();
String objType = (String) _uncommittedTOTable.get(objUid);
try
{
if (_objectStore.currentState(objUid, objType) == StateStatus.OS_UNCOMMITTED)
{
recoverObject(objUid, objType);
}
else
{
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("Object ("+objUid+", "+objType+") is no longer uncommitted.");
}
}
}
catch (ObjectStoreException ose)
{
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("Object ("+objUid+", "+objType+") no longer exists.");
}
}
}
}
/**
* Set-up routine.
*/
protected void initialise ()
{
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TORecoveryModule.initialise()");
}
}
private final void recoverObject (Uid objUid, String objType)
{
if (txojLogger.logger.isDebugEnabled()) {
txojLogger.logger.debug("TORecoveryModule.recoverObject(" + objUid + ", "
+ objType + ")");
}
/*
* Get a shell of the TO and find out which transaction it was that got
* it uncommitted.
*/
RecoveredTransactionalObject recoveredTO = new RecoveredTransactionalObject(
objUid, objType,_objectStore);
/*
* Tell it to replayPhase2, in whatever way it does (in fact it won't do
* anything unless it determines the transaction rolled back).
*/
recoveredTO.replayPhase2();
}
private Hashtable _uncommittedTOTable;
private static ObjectStoreAPI _objectStore = null;
}