/*
* 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.openjpa.persistence;
import java.util.Arrays;
import java.util.BitSet;
import java.util.Collection;
import org.apache.openjpa.datacache.CacheStatistics;
import org.apache.openjpa.datacache.DataCache;
import org.apache.openjpa.datacache.DelegatingDataCache;
import org.apache.openjpa.meta.ClassMetaData;
import org.apache.openjpa.meta.MetaDataRepository;
/**
* Implements the L2 cache over the data store via delegation to DataCache.
*
* @author Abe White
* @since 0.4.1
* @nojavadoc
*/
public class StoreCacheImpl
implements StoreCache {
private final MetaDataRepository _repos;
private final DelegatingDataCache _cache;
/**
* Constructor; supply delegate.
*/
public StoreCacheImpl(EntityManagerFactoryImpl emf, DataCache cache) {
_repos = emf.getConfiguration().getMetaDataRepositoryInstance();
_cache = new DelegatingDataCache(cache,
PersistenceExceptions.TRANSLATOR);
}
/**
* Delegate.
*/
public DataCache getDelegate() {
return _cache.getDelegate();
}
public boolean contains(Class cls, Object oid) {
return _cache.getDelegate() != null && _cache.contains
(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls), oid));
}
public boolean containsAll(Class cls, Object... oids) {
return containsAll(cls, Arrays.asList(oids));
}
public boolean containsAll(Class cls, Collection oids) {
if (_cache.getDelegate() == null)
return oids.isEmpty();
BitSet set = _cache.containsAll(JPAFacadeHelper.toOpenJPAObjectIds
(getMetaData(cls), oids));
for (int i = 0; i < oids.size(); i++)
if (!set.get(i))
return false;
return true;
}
public void pin(Class cls, Object oid) {
if (_cache.getDelegate() != null)
_cache.pin(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls),
oid));
}
public void pinAll(Class cls, Object... oids) {
pinAll(cls, Arrays.asList(oids));
}
public void pinAll(Class cls, Collection oids) {
if (_cache.getDelegate() != null)
_cache.pinAll(JPAFacadeHelper.toOpenJPAObjectIds
(getMetaData(cls), oids));
}
public void unpin(Class cls, Object oid) {
if (_cache.getDelegate() != null)
_cache.unpin(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls),
oid));
}
public void unpinAll(Class cls, Object... oids) {
unpinAll(cls, Arrays.asList(oids));
}
public void unpinAll(Class cls, Collection oids) {
if (_cache.getDelegate() != null)
_cache.unpinAll(JPAFacadeHelper.toOpenJPAObjectIds
(getMetaData(cls), oids));
}
public void evict(Class cls, Object oid) {
if (_cache.getDelegate() != null)
_cache.remove(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls),
oid));
}
public void evictAll(Class cls, Object... oids) {
evictAll(cls, Arrays.asList(oids));
}
public void evictAll(Class cls, Collection oids) {
if (_cache.getDelegate() != null)
_cache.removeAll(JPAFacadeHelper.toOpenJPAObjectIds
(getMetaData(cls), oids));
}
public void evictAll() {
_cache.clear();
}
public CacheStatistics getStatistics() {
return (_cache == null) ? null : _cache.getStatistics();
}
/**
* Return metadata for the given class, throwing the proper exception
* if not persistent.
*/
private ClassMetaData getMetaData(Class cls) {
try {
return _repos.getMetaData(cls, null, true);
} catch (RuntimeException re) {
throw PersistenceExceptions.toPersistenceException(re);
}
}
public int hashCode() {
return _cache.hashCode();
}
public boolean equals(Object other) {
if (other == this)
return true;
if (!(other instanceof StoreCacheImpl))
return false;
return _cache.equals (((StoreCacheImpl) other)._cache);
}
@SuppressWarnings("unchecked")
public void evict(Class cls) {
// Check MetaData throws a consistent exception with evict(Class,
// Object)
if(getMetaData(cls) != null) {
_cache.removeAll(cls, true);
}
}
}