| /* |
| * 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.usergrid.corepersistence.index; |
| |
| |
| import java.util.Map; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import org.apache.usergrid.persistence.map.MapManager; |
| import org.apache.usergrid.utils.JsonUtils; |
| |
| import com.google.common.base.Optional; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| import com.google.inject.Singleton; |
| |
| |
| /** |
| * Cache the calls to update and get the map manager so we don't overload cassandra when we update |
| * after each call? |
| */ |
| @Singleton |
| public class IndexSchemaCacheImpl implements IndexSchemaCache { |
| private static final Logger logger = LoggerFactory.getLogger(IndexSchemaCacheImpl.class ); |
| |
| private final LoadingCache<String,Optional<Map>> indexSchemaCache; |
| private final MapManager mapManager; |
| |
| |
| public IndexSchemaCacheImpl(MapManager mapManager,IndexSchemaCacheFig indexSchemaCacheFig){ |
| this.mapManager = mapManager; |
| indexSchemaCache = CacheBuilder.newBuilder() |
| .maximumSize( indexSchemaCacheFig.getCacheSize() ) |
| //.expireAfterWrite( indexSchemaCacheFig.getCacheTimeout(), TimeUnit.MILLISECONDS ) <-- I don't think we want this to expire that quickly. |
| .build( new CacheLoader<String, Optional<Map>>() { |
| @Override |
| public Optional<Map> load( final String collectionName ) throws Exception { |
| return Optional.fromNullable( retrieveCollectionSchema( collectionName ) ); |
| } |
| } ); |
| } |
| |
| private Map retrieveCollectionSchema( final String collectionName ){ |
| String collectionIndexingSchema = mapManager.getString( collectionName ); |
| Map parsedCollectionIndexingSchema = null; |
| if(collectionIndexingSchema!=null){ |
| return (Map) JsonUtils.parse( collectionIndexingSchema ); |
| |
| } |
| return parsedCollectionIndexingSchema; |
| } |
| |
| |
| @Override |
| public Optional<Map> getCollectionSchema( final String collectionName ) { |
| try { |
| Optional<Map> optionalCollectionSchema = indexSchemaCache.get( collectionName ); |
| if(!optionalCollectionSchema.isPresent()){ |
| indexSchemaCache.invalidate( collectionName ); |
| return Optional.absent(); |
| } |
| return optionalCollectionSchema; |
| }catch(Exception e){ |
| if(logger.isDebugEnabled()){ |
| logger.debug( "Returning for collection name: {} " |
| + "resulted in the following failure: {}",collectionName,e ); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public void putCollectionSchema( final String collectionName, final String collectionSchema ){ |
| mapManager.putString( collectionName, collectionSchema ); |
| evictCollectionSchema( collectionName ); |
| } |
| |
| @Override |
| public void deleteCollectionSchema(final String collectionName){ |
| mapManager.delete( collectionName ); |
| evictCollectionSchema( collectionName ); |
| } |
| |
| @Override |
| public void evictCollectionSchema( final String collectionName ) { |
| indexSchemaCache.invalidate( collectionName ); |
| if(logger.isDebugEnabled() ){ |
| logger.debug( "Invalidated key {}",collectionName ); |
| } |
| |
| } |
| |
| |
| @Override |
| public void evictCache() { |
| indexSchemaCache.invalidateAll(); |
| if(logger.isDebugEnabled()){ |
| logger.debug( "Invalidated all keys" ); |
| } |
| } |
| } |