/**********************************************************************************
* $URL: https://source.sakaiproject.org/svn/search/trunk/search-impl/impl/src/java/org/sakaiproject/search/optimize/shared/impl/SharedFilesystemLoadTransactionListener.java $
* $Id: SharedFilesystemLoadTransactionListener.java 105078 2012-02-24 23:00:38Z ottenhoff@longsight.com $
***********************************************************************************
*
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008 The Sakai Foundation
*
* Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.sakaiproject.search.optimize.shared.impl;
import java.io.File;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.sakaiproject.search.indexer.api.IndexJournalException;
import org.sakaiproject.search.indexer.api.IndexUpdateTransactionListener;
import org.sakaiproject.search.journal.impl.SharedFilesystemJournalStorage;
import org.sakaiproject.search.optimize.shared.api.JournalOptimizationTransaction;
import org.sakaiproject.search.transaction.api.IndexTransaction;
import org.sakaiproject.search.transaction.api.IndexTransactionException;
import org.sakaiproject.search.util.FileUtils;
/**
* A transaction listener that connects to the journalManager and loads segments
* to be optimized
*
* @author ieb
*/
public class SharedFilesystemLoadTransactionListener implements
IndexUpdateTransactionListener
{
private static final Log log = LogFactory
.getLog(SharedFilesystemLoadTransactionListener.class);
private SharedFilesystemJournalStorage sharedFilesystemJournalStorage;
public void init()
{
}
public void destroy()
{
}
/**
* @throws IndexJournalException
* @see org.sakaiproject.search.transaction.api.TransactionListener#prepare(org.sakaiproject.search.indexer.api.IndexUpdateTransaction)
*/
public void prepare(IndexTransaction transaction) throws IndexJournalException
{
try
{
JournalOptimizationTransaction jtransaction = (JournalOptimizationTransaction) transaction;
String workingSpace = jtransaction.getWorkingSpace();
for (long savePoint : jtransaction.getMergeList())
{
sharedFilesystemJournalStorage.retrieveSavePoint(savePoint, workingSpace);
jtransaction.addMergeSegment(sharedFilesystemJournalStorage
.getLocalJournalLocation(savePoint, workingSpace));
}
sharedFilesystemJournalStorage.retrieveSavePoint(jtransaction
.getTargetSavePoint(), workingSpace);
jtransaction.setTargetSegment(sharedFilesystemJournalStorage
.getLocalJournalLocation(jtransaction.getTargetSavePoint(),
workingSpace));
}
catch (Exception ex)
{
throw new IndexJournalException(
"Failed to retrieve Journaled Segments for processing ", ex);
}
}
/**
* @see org.sakaiproject.search.transaction.api.TransactionListener#commit(org.sakaiproject.search.indexer.api.IndexUpdateTransaction)
*/
public void commit(IndexTransaction transaction) throws IndexTransactionException
{
try
{
JournalOptimizationTransaction jtransaction = (JournalOptimizationTransaction) transaction;
List<Long> mergeList = jtransaction.getMergeList();
// dont delete the last shared segment, we want to keep all versions
mergeList.remove(mergeList.size()-1);
for (long savePoint : jtransaction.getMergeList())
{
sharedFilesystemJournalStorage.removeJournal(savePoint);
}
// we will leave previous versions of this save point in place in the shared
// space, only allowing them to be cleaned up as a whole.
// there will be no trimming of versions of a segment
for (File f : jtransaction.getMergeSegmentList())
{
log.debug("Deleting Segment " + f.getPath());
FileUtils.deleteAll(f);
}
log.debug("Deleting Segment " + jtransaction.getTargetSegment().getPath());
FileUtils.deleteAll(jtransaction.getTargetSegment());
}
catch (Exception ex)
{
throw new IndexJournalException(
"Failed to retrieve Journaled Segments for processing ", ex);
}
}
/**
* @see org.sakaiproject.search.transaction.api.TransactionListener#open(org.sakaiproject.search.indexer.api.IndexUpdateTransaction)
*/
public void open(IndexTransaction transaction)
{
}
/**
* @see org.sakaiproject.search.transaction.api.TransactionListener#close(org.sakaiproject.search.transaction.api.IndexTransaction)
*/
public void close(IndexTransaction transaction) throws IndexTransactionException
{
}
/**
* @throws IndexJournalException
* @see org.sakaiproject.search.transaction.api.TransactionListener#rollback(org.sakaiproject.search.indexer.api.IndexUpdateTransaction)
*/
public void rollback(IndexTransaction transaction) throws IndexJournalException
{
try
{
JournalOptimizationTransaction jtransaction = (JournalOptimizationTransaction) transaction;
if (jtransaction.getMergeSegmentList() != null)
{
for (File f : jtransaction.getMergeSegmentList())
{
FileUtils.deleteAll(f);
}
}
if (jtransaction.getTargetSegment() != null)
{
FileUtils.deleteAll(jtransaction.getTargetSegment());
}
}
catch (Exception ex)
{
throw new IndexJournalException("Failed to rollback Journaled Segments ", ex);
}
}
/**
* @return the sharedFilesystemJournalStorage
*/
public SharedFilesystemJournalStorage getSharedFilesystemJournalStorage()
{
return sharedFilesystemJournalStorage;
}
/**
* @param sharedFilesystemJournalStorage
* the sharedFilesystemJournalStorage to set
*/
public void setSharedFilesystemJournalStorage(
SharedFilesystemJournalStorage sharedFilesystemJournalStorage)
{
this.sharedFilesystemJournalStorage = sharedFilesystemJournalStorage;
}
}