71 lines
1.8 KiB
Java
71 lines
1.8 KiB
Java
package org.gcube.portlet.user.userstatisticsportlet.server.cache;
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import java.util.Map;
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import java.util.concurrent.ConcurrentHashMap;
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import com.liferay.portal.kernel.log.Log;
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import com.liferay.portal.kernel.log.LogFactoryUtil;
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/**
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* Cache for the user's space in use within the infrastructure
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* @author Costantino Perciante at ISTI-CNR
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* (costantino.perciante@isti.cnr.it)
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*/
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public class UserInfrastructureSpaceCache implements CacheInterface<String, Long> {
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//private static final org.slf4j.Logger logger = LoggerFactory.getLogger(UserInfrastructureSpaceCache.class);
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private static final Log logger = LogFactoryUtil.getLog(UserInfrastructureSpaceCache.class);
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/**
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* The instance
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*/
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private static UserInfrastructureSpaceCache instance = new UserInfrastructureSpaceCache();
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/**
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* The hashmap
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*/
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private Map<String, CacheValueBean<Long>> userSpaceMap;
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/**
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* Cache entry expires after EXPIRED_AFTER ms
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*/
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private static final long EXPIRED_AFTER = 1000 * 60 * 10;
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/**
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* Private constructor
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*/
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private UserInfrastructureSpaceCache(){
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userSpaceMap = new ConcurrentHashMap<>();
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}
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/**
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* Retrieve the current cache instance object
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* @return
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*/
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public static UserInfrastructureSpaceCache getCacheInstance(){
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return instance;
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}
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@Override
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public Long get(String key) {
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if(userSpaceMap.containsKey(key)){
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CacheValueBean<Long> bean = userSpaceMap.get(key);
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if(CacheUtilities.expired(bean.getTTL(), EXPIRED_AFTER)){
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userSpaceMap.remove(key);
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logger.debug("Amount of space in the infrastructure used expired for key " + key + ", returning null");
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}
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else
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return bean.getValue();
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}
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return null;
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}
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@Override
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public boolean insert(String key, Long value) {
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CacheValueBean<Long> newBean = new CacheValueBean<Long>(value, System.currentTimeMillis());
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userSpaceMap.put(key, newBean);
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return true;
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}
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}
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