/* $Id$ */
/**
* 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.manifoldcf.crawler.system;
import org.apache.manifoldcf.core.interfaces.*;
import org.apache.manifoldcf.crawler.interfaces.*;
import java.util.*;
import java.lang.reflect.*;
/** This class describes the thread that cleans up history records.
* It fires infrequently and removes history records older than a configuration-determined cutoff.
*/
public class HistoryCleanupThread extends Thread
{
public static final String _rcsid = "@(#)$Id$";
protected static final String historyCleanupIntervalProperty = "org.apache.manifoldcf.crawler.historycleanupinterval";
// Local data
/** Process ID */
protected final String processID;
/** Constructor.
*/
public HistoryCleanupThread(String processID)
throws ManifoldCFException
{
super();
this.processID = processID;
setName("History cleanup thread");
setDaemon(true);
}
public void run()
{
try
{
// Create a thread context object.
IThreadContext threadContext = ThreadContextFactory.make();
IRepositoryConnectionManager connectionManager = RepositoryConnectionManagerFactory.make(threadContext);
// Default zero value means we never clean up, which is the backwards-compatible behavior
long historyCleanupInterval = LockManagerFactory.getLongProperty(threadContext, historyCleanupIntervalProperty, 0L);
// Loop
while (true)
{
if (Thread.currentThread().isInterrupted())
break;
// Do another try/catch around everything in the loop
try
{
// Get current time
long currentTime = System.currentTimeMillis();
// Log it
if (Logging.threads.isDebugEnabled())
Logging.threads.debug("History cleanup thread - removing old history at "+new Long(currentTime).toString());
if (historyCleanupInterval > 0L && historyCleanupInterval < currentTime)
connectionManager.cleanUpHistoryData(currentTime - historyCleanupInterval);
else
Logging.threads.debug(" History cleanup thread did nothing because cleanup disabled");
// Loop around again, after resting a while
ManifoldCF.sleep(60L * 60L * 1000L);
}
catch (ManifoldCFException e)
{
if (e.getErrorCode() == ManifoldCFException.INTERRUPTED)
break;
if (e.getErrorCode() == ManifoldCFException.DATABASE_CONNECTION_ERROR)
{
Logging.threads.error("History thread aborting and restarting due to database connection reset: "+e.getMessage(),e);
try
{
// Give the database a chance to catch up/wake up
ManifoldCF.sleep(10000L);
}
catch (InterruptedException se)
{
break;
}
continue;
}
// Log it, but keep the thread alive
Logging.threads.error("Exception tossed: "+e.getMessage(),e);
if (e.getErrorCode() == ManifoldCFException.SETUP_ERROR)
{
// Shut the whole system down!
System.exit(1);
}
}
catch (InterruptedException e)
{
// We're supposed to quit
break;
}
catch (OutOfMemoryError e)
{
System.err.println("agents process ran out of memory - shutting down");
e.printStackTrace(System.err);
System.exit(-200);
}
catch (Throwable e)
{
// A more severe error - but stay alive
Logging.threads.fatal("Error tossed: "+e.getMessage(),e);
}
}
}
catch (Throwable e)
{
// Severe error on initialization
System.err.println("agents process could not start - shutting down");
Logging.threads.fatal("HistoryCleanupThread initialization error tossed: "+e.getMessage(),e);
System.exit(-300);
}
}
}