framework/pull-agent/src/main/java/org/apache/manifoldcf/authorities/system/IdleCleanupThread.java

/* $Id: IdleCleanupThread.java 988245 2010-08-23 18:39:35Z kwright $ */

/**
* 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.authorities.system;

import org.apache.manifoldcf.core.interfaces.*;
import org.apache.manifoldcf.agents.interfaces.*;
import org.apache.manifoldcf.authorities.interfaces.*;
import org.apache.manifoldcf.authorities.system.Logging;
import java.util.*;
import java.lang.reflect.*;

/** This thread periodically calls the cleanup method in all connected repository connectors.  The ostensible purpose
* is to allow the connectors to shutdown idle connections etc.
*/
public class IdleCleanupThread extends Thread
{
  public static final String _rcsid = "@(#)$Id: IdleCleanupThread.java 988245 2010-08-23 18:39:35Z kwright $";

  // Local data


  /** Constructor.
  */
  public IdleCleanupThread()
    throws ManifoldCFException
  {
    super();
    setName("Idle cleanup thread");
    setDaemon(true);
  }

  public void run()
  {
    try
    {
      // Create a thread context object.
      IThreadContext threadContext = ThreadContextFactory.make();
      ICacheManager cacheManager = CacheManagerFactory.make(threadContext);
      IAuthorityConnectorPool authorityConnectorPool = AuthorityConnectorPoolFactory.make(threadContext);
      IMappingConnectorPool mappingConnectorPool = MappingConnectorPoolFactory.make(threadContext);
      
      // Loop
      while (true)
      {
        // Do another try/catch around everything in the loop
        try
        {
          // Do the cleanup
          authorityConnectorPool.pollAllConnectors();
          mappingConnectorPool.pollAllConnectors();
          cacheManager.expireObjects(System.currentTimeMillis());
          
          // Sleep for the retry interval.
          ManifoldCF.sleep(5000L);
        }
        catch (ManifoldCFException e)
        {
          if (e.getErrorCode() == ManifoldCFException.INTERRUPTED)
            break;

          // Log it, but keep the thread alive
          Logging.authorityService.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 (Throwable e)
        {
          // A more severe error - but stay alive
          Logging.authorityService.fatal("Error tossed: "+e.getMessage(),e);
        }
      }
    }
    catch (Throwable e)
    {
      // Severe error on initialization
      System.err.println("Authority service idle cleanup could not start - shutting down");
      Logging.authorityService.fatal("IdleCleanupThread initialization error tossed: "+e.getMessage(),e);
      System.exit(-300);
    }
  }

}