/*
 * Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
 * 
 * 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 freemarker.cache;

/**
 * An optional interface for cache storage that knows whether it can be 
 * concurrently accessible without synchronization.
 */
public interface ConcurrentCacheStorage extends CacheStorage {
    
    /**
     * Returns true if this instance of cache storage is concurrently 
     * accessible from multiple threads without synchronization.
     * @return true if this instance of cache storage is concurrently 
     * accessible from multiple threads without synchronization.
     */
    public boolean isConcurrent();
}
