com.wudaosoft.commons.cache.LocalCache Maven / Gradle / Ivy
/**
* Copyright 2009-2018 Wudao Software Studio(wudaosoft.com)
*
* 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 com.wudaosoft.commons.cache;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
/**
* @author Changsoul.Wu
* @date 2013-3-11 下午3:25:53
*/
public class LocalCache {
private final LRUMap CACHE_MAP;
private final LRUMap TIMEOUT_MAP;
@SuppressWarnings({ "unchecked", "rawtypes" })
public LocalCache(int maxSize) {
this.CACHE_MAP = new LRUMap(maxSize);
this.TIMEOUT_MAP = new LRUMap(maxSize);
}
public V get(K key) {
Long timeout = this.TIMEOUT_MAP.get(key);
if (timeout != null) {
if (System.currentTimeMillis() < timeout.longValue())
return this.CACHE_MAP.get(key);
this.TIMEOUT_MAP.remove(key);
this.CACHE_MAP.remove(key);
}
return null;
}
public boolean put(K key, V value, int TTL) {
this.CACHE_MAP.put(key, value);
this.TIMEOUT_MAP.put(key, Long.valueOf(System.currentTimeMillis() + TTL * 1000));
return true;
}
public boolean refresh(K key, int TTL) {
this.TIMEOUT_MAP.put(key, Long.valueOf(System.currentTimeMillis() + TTL * 1000));
return true;
}
public boolean remove(K key) {
this.CACHE_MAP.remove(key);
this.TIMEOUT_MAP.remove(key);
return true;
}
public void clearExpiredCache() {
Set keys = this.CACHE_MAP.keySet();
if(keys == null)
return;
List newKeys = new ArrayList(keys);
Iterator iter = newKeys.iterator();
while (iter.hasNext()) {
get(iter.next());
}
}
}