| /* |
| * 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 |
| */ |
| 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. |
| */ |
| @Override |
| public DataCache getDelegate() { |
| return _cache.getDelegate(); |
| } |
| |
| @Override |
| public boolean contains(Class cls, Object oid) { |
| return _cache.getDelegate() != null && _cache.contains |
| (JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls), oid)); |
| } |
| |
| @Override |
| public boolean containsAll(Class cls, Object... oids) { |
| return containsAll(cls, Arrays.asList(oids)); |
| } |
| |
| @Override |
| 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; |
| } |
| |
| @Override |
| public void pin(Class cls, Object oid) { |
| if (_cache.getDelegate() != null) |
| _cache.pin(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls), |
| oid)); |
| } |
| |
| @Override |
| public void pinAll(Class cls, Object... oids) { |
| pinAll(cls, Arrays.asList(oids)); |
| } |
| |
| @Override |
| public void pinAll(Class cls, Collection oids) { |
| if (_cache.getDelegate() != null) |
| _cache.pinAll(JPAFacadeHelper.toOpenJPAObjectIds |
| (getMetaData(cls), oids)); |
| } |
| |
| @Override |
| public void unpin(Class cls, Object oid) { |
| if (_cache.getDelegate() != null) |
| _cache.unpin(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls), |
| oid)); |
| } |
| |
| @Override |
| public void unpinAll(Class cls, Object... oids) { |
| unpinAll(cls, Arrays.asList(oids)); |
| } |
| |
| @Override |
| public void unpinAll(Class cls, Collection oids) { |
| if (_cache.getDelegate() != null) |
| _cache.unpinAll(JPAFacadeHelper.toOpenJPAObjectIds |
| (getMetaData(cls), oids)); |
| } |
| |
| @Override |
| public void evict(Class cls, Object oid) { |
| if (_cache.getDelegate() != null) |
| _cache.remove(JPAFacadeHelper.toOpenJPAObjectId(getMetaData(cls), |
| oid)); |
| } |
| |
| @Override |
| public void evictAll(Class cls, Object... oids) { |
| evictAll(cls, Arrays.asList(oids)); |
| } |
| |
| @Override |
| public void evictAll(Class cls, Collection oids) { |
| if (_cache.getDelegate() != null) |
| _cache.removeAll(JPAFacadeHelper.toOpenJPAObjectIds |
| (getMetaData(cls), oids)); |
| } |
| |
| @Override |
| public void evictAll() { |
| _cache.clear(); |
| } |
| |
| @Override |
| public <T> T unwrap(Class<T> cls) { |
| if (cls.isInstance(this)) { |
| return cls.cast(this); |
| } |
| throw new javax.persistence.PersistenceException(cls.getName() + " not supported"); |
| } |
| |
| @Override |
| 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); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| return (_cache == null) ? 0 : _cache.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (other == this) |
| return true; |
| if ((other == null) || (other.getClass() != this.getClass())) |
| return false; |
| if (_cache == null) |
| return false; |
| return _cache.equals (((StoreCacheImpl) other)._cache); |
| } |
| |
| @Override |
| @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); |
| } |
| } |
| } |