Package org.jahia.services.render.filter.cache

Source Code of org.jahia.services.render.filter.cache.RenderServiceTemplateCacheEventListener

/**
* This file is part of Jahia, next-generation open source CMS:
* Jahia's next-generation, open source CMS stems from a widely acknowledged vision
* of enterprise application convergence - web, search, document, social and portal -
* unified by the simplicity of web content management.
*
* For more information, please visit http://www.jahia.com.
*
* Copyright (C) 2002-2011 Jahia Solutions Group SA. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* As a special exception to the terms and conditions of version 2.0 of
* the GPL (or any later version), you may redistribute this Program in connection
* with Free/Libre and Open Source Software ("FLOSS") applications as described
* in Jahia's FLOSS exception. You should have received a copy of the text
* describing the FLOSS exception, and it is also available here:
* http://www.jahia.com/license
*
* Commercial and Supported Versions of the program (dual licensing):
* alternatively, commercial and supported versions of the program may be used
* in accordance with the terms and conditions contained in a separate
* written agreement between you and Jahia Solutions Group SA.
*
* If you are unsure which license is appropriate for your use,
* please contact the sales department at sales@jahia.com.
*/

package org.jahia.services.render.filter.cache;

import org.jahia.services.SpringContextSingleton;
import org.jahia.services.content.DefaultEventListener;
import org.jahia.services.render.RenderService;
import org.slf4j.Logger;

import javax.jcr.RepositoryException;
import javax.jcr.observation.Event;
import javax.jcr.observation.EventIterator;

/**
* Output cache invalidation listener.
*
* @author : rincevent
* @since JAHIA 6.5
*        Created : 12 janv. 2010
*/
public class RenderServiceTemplateCacheEventListener extends DefaultEventListener {
    private transient static Logger logger = org.slf4j.LoggerFactory.getLogger(
            RenderServiceTemplateCacheEventListener.class);

    private RenderService renderService;
    private CacheKeyGenerator cacheKeyGenerator;

    @Override
    public int getEventTypes() {
        return Event.NODE_ADDED + Event.PROPERTY_ADDED + Event.PROPERTY_CHANGED + Event.PROPERTY_REMOVED +
               Event.NODE_MOVED + Event.NODE_REMOVED;
    }

    /**
     * This method is called when a bundle of events is dispatched.
     *
     * @param events The event set received.
     */
    public void onEvent(EventIterator events) {

        while (events.hasNext()) {
            Event event = (Event) events.next();
            try {
                String path = event.getPath();
                if (!path.startsWith("/jcr:system")) {
                    boolean flushRoles = false;
                    final int type = event.getType();
                    if (renderService == null) {
                        renderService = (RenderService) SpringContextSingleton.getBean("RenderService");
                    }
                    if (renderService != null) {
                        if (path.contains("/templates") || path.startsWith("/templateSets")) {
                            renderService.flushCache();
                        }
                        if (path.contains("j:templateNode")) {
                            renderService.flushCache();
                        }
                        if (path.endsWith("j:roles")) {
                            flushRoles = true;
                        }
                        if (path.contains("j:acl") || path.contains("jnt:group") || flushRoles ||
                            type == Event.NODE_MOVED) {
                            // Flushing cache of acl key for users as a group or an acl has been updated
                            if (cacheKeyGenerator instanceof DefaultCacheKeyGenerator) {
                                DefaultCacheKeyGenerator generator = (DefaultCacheKeyGenerator) cacheKeyGenerator;
                                generator.flushUsersGroupsKey();
                            }
                        }
                    }
                }
            } catch (RepositoryException e) {
                logger.error(e.getMessage(), e);
            }

        }
    }

    public void setCacheKeyGenerator(CacheKeyGenerator cacheKeyGenerator) {
        this.cacheKeyGenerator = cacheKeyGenerator;
    }

    public void setRenderService(RenderService renderService) {
        this.renderService = renderService;
    }
}
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