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/**
 *  Copyright Terracotta, Inc.
 *
 *  Licensed 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 net.sf.ehcache.hibernate.ccs;

import java.util.Comparator;

import org.hibernate.cache.CacheException;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.hibernate.cache.access.SoftLock;

/**
 * Ehcache specific read-only cache concurrency strategy.
 * 

* This is the Ehcache specific equivalent to Hibernate's ReadOnlyCache. * * @author Chris Dennis */ @Deprecated public class EhcacheReadOnlyCache extends AbstractEhcacheConcurrencyStrategy { private static final Logger LOG = LoggerFactory.getLogger(EhcacheReadOnlyCache.class); /** * {@inheritDoc} */ public Object get(Object key, long timestamp) throws CacheException { return cache.get(key); } /** * Throws UnsupportedOperationException since items in a read-only cache should not be mutated. * * @throws UnsupportedOperationException always */ public SoftLock lock(Object key, Object version) throws UnsupportedOperationException { LOG.error("Application attempted to edit read only item: " + key); throw new UnsupportedOperationException("Can't write to a readonly object"); } /** * {@inheritDoc} */ public boolean put(Object key, Object value, long timestamp, Object version, Comparator versionComparator, boolean minimalPut) throws CacheException { if (minimalPut && cache.get(key) != null) { return false; } else { cache.put(key, value); return true; } } /** * Logs an error since items in a read-only cache should not be mutated. */ public void release(Object key, SoftLock lock) { LOG.error("Application attempted to edit read only item: " + key); //throw new UnsupportedOperationException("Can't write to a readonly object"); } /** * Throws UnsupportedOperationException since items in a read-only cache should not be mutated. * * @throws UnsupportedOperationException always */ public boolean afterUpdate(Object key, Object value, Object version, SoftLock lock) throws UnsupportedOperationException { LOG.error("Application attempted to edit read only item: " + key); throw new UnsupportedOperationException("Can't write to a readonly object"); } /** * Inserts the specified item into the cache. */ public boolean afterInsert(Object key, Object value, Object version) throws CacheException { cache.update(key, value); return true; } /** * A No-Op, since we are an asynchronous cache concurrency strategy. */ public void evict(Object key) throws CacheException { } /** * A No-Op, since we are an asynchronous cache concurrency strategy. */ public boolean insert(Object key, Object value, Object currentVersion) { return false; } /** * Throws UnsupportedOperationException since items in a read-only cache should not be mutated. * * @throws UnsupportedOperationException always */ public boolean update(Object key, Object value, Object currentVersion, Object previousVersion) throws UnsupportedOperationException { LOG.error("Application attempted to edit read only item: " + key); throw new UnsupportedOperationException("Can't write to a readonly object"); } /** * {@inheritDoc} */ @Override public String toString() { return cache + "(read-only)"; } }





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