001/* 002 * Copyright 2010 Anyware Services 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.ametys.plugins.tagcloud.cache; 017 018import java.util.Map; 019 020import org.apache.avalon.framework.service.ServiceException; 021import org.apache.avalon.framework.service.ServiceManager; 022import org.apache.avalon.framework.service.Serviceable; 023 024import org.ametys.core.observation.Event; 025import org.ametys.core.observation.Observer; 026import org.ametys.web.ObservationConstants; 027import org.ametys.web.cache.AbstractCacheObserver; 028import org.ametys.web.repository.page.ZoneItem; 029 030/** 031 * {@link Observer} for observing service modification or deletion in order to 032 * invalidate cache for tag cloud 033 */ 034public class InvalidTagCloudCacheOnServiceModification extends AbstractCacheObserver implements Serviceable 035{ 036 037 private TagCloudCacheManager _cacheManager; 038 039 @Override 040 public void service(ServiceManager smanager) throws ServiceException 041 { 042 _cacheManager = (TagCloudCacheManager) smanager.lookup(TagCloudCacheManager.ROLE); 043 } 044 045 @Override 046 public boolean supports(Event event) 047 { 048 return event.getId().equals(ObservationConstants.EVENT_SERVICE_MODIFIED) 049 || event.getId().equals(ObservationConstants.EVENT_ZONEITEM_DELETED) 050 || event.getId().equals(ObservationConstants.EVENT_ZONEITEM_MODIFIED); 051 } 052 053 @Override 054 public void observe(Event event, Map<String, Object> transientVars) throws Exception 055 { 056 String zoneItemId = null; 057 058 if (event.getArguments().containsKey(ObservationConstants.ARGS_ZONE_ITEM)) 059 { 060 // In case of EVENT_SERVICE_MODIFIED 061 zoneItemId = ((ZoneItem) event.getArguments().get(ObservationConstants.ARGS_ZONE_ITEM)).getId(); 062 } 063 else 064 { 065 // In case of EVENT_ZONEITEM_DELETED 066 zoneItemId = (String) event.getArguments().get(ObservationConstants.ARGS_ZONE_ITEM_ID); 067 } 068 069 // Invalidate cache for zone item 070 _cacheManager.invalidateTagCloud(zoneItemId); 071 } 072 073}