org.omnifaces.util.cache.DefaultCache Maven / Gradle / Ivy
/*
* Copyright OmniFaces
*
* 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
*
* https://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.omnifaces.util.cache;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.omnifaces.util.concurrentlinkedhashmap.ConcurrentLinkedHashMap;
/**
* An in-memory cache implementation that's used if the user did not configure an explicit caching provider.
*
* For the actual implementation, a repackaged {@link ConcurrentLinkedHashMap} is used if a maximum capacity is requested,
* otherwise a plain {@link ConcurrentHashMap} is used.
*
* See: https://github.com/ben-manes/concurrentlinkedhashmap
*
* @since 1.1
* @author Arjan Tijms
*
*/
public class DefaultCache extends TimeToLiveCache {
private static final long serialVersionUID = 1L;
public DefaultCache(Integer defaultTimeToLive, Integer maxCapacity) {
super(defaultTimeToLive);
setCacheStore(createCacheStore(maxCapacity));
}
private Map createCacheStore(Integer maxCapacity) {
if (maxCapacity != null) {
return new ConcurrentLinkedHashMap.Builder()
.maximumWeightedCapacity(maxCapacity)
.build();
} else {
return new ConcurrentHashMap<>();
}
}
}