| /* $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.crawler.system; |
| |
| import org.apache.manifoldcf.core.interfaces.*; |
| import org.apache.manifoldcf.agents.interfaces.*; |
| import org.apache.manifoldcf.crawler.interfaces.*; |
| import org.apache.manifoldcf.crawler.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 |
| /** Process ID */ |
| protected final String processID; |
| |
| /** Constructor. |
| */ |
| public IdleCleanupThread(String processID) |
| throws ManifoldCFException |
| { |
| super(); |
| this.processID = processID; |
| setName("Crawler idle cleanup thread"); |
| setDaemon(true); |
| } |
| |
| public void run() |
| { |
| Logging.threads.debug("Start up crawler idle cleanup thread"); |
| try |
| { |
| // Create a thread context object. |
| IThreadContext threadContext = ThreadContextFactory.make(); |
| |
| IRepositoryConnectorPool repositoryConnectorPool = RepositoryConnectorPoolFactory.make(threadContext); |
| INotificationConnectorPool notificationConnectorPool = NotificationConnectorPoolFactory.make(threadContext); |
| |
| // Loop |
| while (true) |
| { |
| // Do another try/catch around everything in the loop |
| try |
| { |
| // Do the cleanup |
| repositoryConnectorPool.pollAllConnectors(); |
| notificationConnectorPool.pollAllConnectors(); |
| // This is unnecessary because agents.interfaces.IdleCleanupThread does it. |
| //ManifoldCF.pollAll(threadContext); |
| |
| // Sleep for the retry interval. |
| ManifoldCF.sleep(5000L); |
| } |
| catch (ManifoldCFException e) |
| { |
| if (e.getErrorCode() == ManifoldCFException.INTERRUPTED) |
| break; |
| |
| if (e.getErrorCode() == ManifoldCFException.DATABASE_CONNECTION_ERROR) |
| { |
| Logging.threads.error("Idle cleanup 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("IdleCleanupThread initialization error tossed: "+e.getMessage(),e); |
| System.exit(-300); |
| } |
| |
| } |
| |
| } |