121 lines
4.1 KiB
Java
121 lines
4.1 KiB
Java
/*
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* Copyright (C) 2007 Chris Gilbert. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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package com.arsdigita.forum;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.Timer;
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import org.apache.log4j.Logger;
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import com.arsdigita.kernel.Kernel;
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import com.arsdigita.kernel.KernelExcursion;
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import com.arsdigita.persistence.Session;
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import com.arsdigita.persistence.SessionManager;
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import com.arsdigita.persistence.TransactionContext;
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import com.arsdigita.util.UncheckedWrapperException;
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/**
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* Scheduler thread to remove any files or images that are more than a day old
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* and haven't been attached to a post.
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* These posts arise if a user starts to create a post and closes their browser
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* before completing the post. This
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* process gets rid of them on a daily basis to keep them under control
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*
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* nb - We can't just delete all unattached assets, as some may be there because the user is
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* halfway through making a new post
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*
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* @author Chris Gilbert(chris.gilbert@westsussex.gov.uk)
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* @version $Id: RemoveUnattachedAssetsScheduler.java,v 1.1 2006/07/13 10:19:28 cgyg9330 Exp $
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*/
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public class RemoveUnattachedAssetsScheduler {
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// For storing timer which runs a method periodically to fire
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// begin and end events
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private static Timer s_Timer;
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// if process runs very very slowly, prevent duplicate attempt from
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// running before the first one ends
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private static boolean s_running = false;
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private static Logger s_log =
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Logger.getLogger( RemoveUnattachedAssetsScheduler.class);
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/**
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* startTimer - starts the timer
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*/
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public static synchronized void startTimer() {
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if ( s_Timer != null ) {
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return; // Timer already exists
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}
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// Timer triggers straight away, and then every 24 hours
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// don't run timer as a daemon - if server stops, kill this process
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// too, as no one will be creating new posts
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// s_Timer = new Timer(true);
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// Problem as with version 6.6 / rev. 2021 and earlier:
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// The tomcat shutdown command does not finish completely. Several
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// background processes prevent a clean shutdown. Details have to be
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// figured out yet (Nov. 2, 2009)
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// Timer is now a daemon thread so that Tomcat stops gracefully
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s_Timer = new Timer(false);
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s_Timer.scheduleAtFixedRate(new RemoveUnattachedAssetsTask(), 0, 1000 * 60 * 60 * 24);
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}
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/**
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* run - Run the task
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*/
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public static synchronized void run() {
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s_log.debug("Firing off scheduler");
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Session ssn = SessionManager.getSession();
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if ( !s_running ) {
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new KernelExcursion() {
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protected final void excurse() {
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s_running = true;
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try {
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setEffectiveParty(Kernel.getSystemParty());
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TransactionContext txn =SessionManager.getSession().getTransactionContext();
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txn.beginTxn();
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PostFileAttachment.removeUnattachedFiles();
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PostImageAttachment.removeUnattachedImages();
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txn.commitTxn();
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} catch (Throwable t) {
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s_log.error("Attempt to remove unconfirmed forum posts failed", t);
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throw new UncheckedWrapperException(t);
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} finally {
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s_running = false;
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}
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}
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}.run();
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}
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}
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}
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