/*
* 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 org.ehcache.impl.serialization;
import org.ehcache.impl.internal.concurrent.ConcurrentHashMap;
import org.ehcache.spi.persistence.StateHolder;
import org.ehcache.spi.persistence.StateRepository;
import java.io.Serializable;
import java.util.concurrent.ConcurrentMap;
/**
* TransientStateRepository
*/
public class TransientStateRepository implements StateRepository {
private ConcurrentMap<String, StateHolder<?, ?>> knownHolders = new ConcurrentHashMap<String, StateHolder<?, ?>>();
@Override
@SuppressWarnings("unchecked")
public <K extends Serializable, V extends Serializable> StateHolder<K, V> getPersistentStateHolder(String name, Class<K> keyClass, Class<V> valueClass) {
StateHolder<K, V> stateHolder = (StateHolder<K, V>) knownHolders.get(name);
if (stateHolder != null) {
return stateHolder;
} else {
StateHolder<K, V> newHolder = new TransientStateHolder<K, V>();
stateHolder = (StateHolder<K, V>) knownHolders.putIfAbsent(name, newHolder);
if (stateHolder == null) {
return newHolder;
} else {
return stateHolder;
}
}
}
}