/*
* 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.marmotta.ldcache.sail;
import org.apache.marmotta.commons.sesame.filter.AlwaysTrueFilter;
import org.apache.marmotta.commons.sesame.filter.SesameFilter;
import org.apache.marmotta.ldcache.api.LDCachingBackend;
import org.apache.marmotta.ldcache.model.CacheConfiguration;
import org.apache.marmotta.ldcache.services.LDCache;
import org.apache.marmotta.ldclient.model.ClientConfiguration;
import org.openrdf.model.Resource;
import org.openrdf.sail.NotifyingSail;
import org.openrdf.sail.NotifyingSailConnection;
import org.openrdf.sail.SailException;
import org.openrdf.sail.helpers.NotifyingSailWrapper;
/**
* A generic caching sail that can be used with any Sesame SAIL to integrate LDCache transparent Linked Data Caching.
*
* @author Sebastian Schaffert (sschaffert@apache.org)
* @author Jakob Frank (jakob@apache.org)
*/
public class GenericLinkedDataSail extends NotifyingSailWrapper {
private final LDCachingBackend cachingBackend;
private CacheConfiguration config;
private LDCache ldcache;
private SesameFilter<Resource> acceptForCaching;
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend) {
this(base, cachingBackend, new AlwaysTrueFilter<Resource>(), createCacheConfiguration(null));
}
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend, ClientConfiguration clientConfig) {
this(base, cachingBackend, new AlwaysTrueFilter<Resource>(), clientConfig);
}
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend, CacheConfiguration cacheConfig) {
this(base, cachingBackend, new AlwaysTrueFilter<Resource>(), cacheConfig);
}
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend, SesameFilter<Resource> acceptForCaching) {
this(base, cachingBackend, acceptForCaching, createCacheConfiguration(null));
}
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend, SesameFilter<Resource> acceptForCaching, ClientConfiguration clientConfig) {
this(base, cachingBackend, acceptForCaching, createCacheConfiguration(clientConfig));
}
public GenericLinkedDataSail(NotifyingSail base, LDCachingBackend cachingBackend, SesameFilter<Resource> acceptForCaching, CacheConfiguration cacheConfig) {
super(base);
this.cachingBackend = cachingBackend;
this.acceptForCaching = acceptForCaching;
this.config = cacheConfig;
}
private static CacheConfiguration createCacheConfiguration(ClientConfiguration cc) {
CacheConfiguration config = new CacheConfiguration();
if (cc != null) {
config.setClientConfiguration(cc);
}
return config;
}
@Override
public NotifyingSailConnection getConnection() throws SailException {
return new GenericLinkedDataSailConnection(super.getConnection(), ldcache, acceptForCaching);
}
@Override
public void initialize() throws SailException {
super.initialize();
cachingBackend.initialize();
ldcache = new LDCache(this.config,cachingBackend);
}
@Override
public void shutDown() throws SailException {
super.shutDown();
cachingBackend.shutdown();
ldcache.shutdown();
}
public void reinit() {
ldcache.shutdown();
ldcache = new LDCache(this.config,cachingBackend);
}
public CacheConfiguration getCacheConfiguration() {
return config;
}
public LDCache getLDCache() {
return ldcache;
}
}