/*
* Copyright 2002-2012 the original author or authors.
*
* 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 org.springframework.cache.transaction;
import org.springframework.cache.Cache;
import org.springframework.transaction.support.TransactionSynchronizationAdapter;
import org.springframework.transaction.support.TransactionSynchronizationManager;
import org.springframework.util.Assert;
/**
* Cache decorator which synchronizes its {@link #put} and {@link #evict} operations with
* Spring-managed transactions (through Spring's {@link TransactionSynchronizationManager},
* performing the actual cache put/evict operation only in the after-commit phase of a
* successful transaction. If no transaction is active, {@link #put} and {@link #evict}
* operations will be performed immediately, as usual.
*
* @author Juergen Hoeller
* @since 3.2
* @see TransactionAwareCacheManagerProxy
*/
public class TransactionAwareCacheDecorator implements Cache {
private final Cache targetCache;
/**
* Create a new TransactionAwareCache for the given target Cache.
* @param targetCache the target Cache to decorate
*/
public TransactionAwareCacheDecorator(Cache targetCache) {
Assert.notNull(targetCache, "Target Cache must not be null");
this.targetCache = targetCache;
}
public String getName() {
return this.targetCache.getName();
}
public Object getNativeCache() {
return this.targetCache.getNativeCache();
}
public ValueWrapper get(Object key) {
return this.targetCache.get(key);
}
public void put(final Object key, final Object value) {
if (TransactionSynchronizationManager.isSynchronizationActive()) {
TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronizationAdapter() {
@Override
public void afterCommit() {
targetCache.put(key, value);
}
});
}
else {
this.targetCache.put(key, value);
}
}
public void evict(final Object key) {
if (TransactionSynchronizationManager.isSynchronizationActive()) {
TransactionSynchronizationManager.registerSynchronization(new TransactionSynchronizationAdapter() {
@Override
public void afterCommit() {
targetCache.evict(key);
}
});
}
else {
this.targetCache.evict(key);
}
}
public void clear() {
this.targetCache.clear();
}
}