/**
* Copyright (C) 2011 JTalks.org Team
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jtalks.jcommune.service.nontransactional;
import net.sf.ehcache.Ehcache;
import net.sf.ehcache.Element;
/**
* Operations above user data cache.
*
* @author Kirill Afonin
*/
public class UserDataCacheService {
private final Ehcache userDataCache;
/**
* Instantiate bean.
*
* @param userDataCache cache
*/
public UserDataCacheService(Ehcache userDataCache) {
this.userDataCache = userDataCache;
}
/**
* Get new messages count for {@code username} in cache.
*
* @param username username
* @return new messages count or {@code null} if user not in cache
*/
public Integer getNewPmCountFor(String username) {
Element cacheElementForUser = userDataCache.get(username);
if (cacheElementForUser == null) {
return null;
}
return (Integer) cacheElementForUser.getValue();
}
/**
* Put new messages count for {@code username} to cache.
*
* @param username username
* @param count new messages count
*/
public void putNewPmCount(String username, int count) {
userDataCache.put(new Element(username, count));
}
/**
* Increment new messages count for {@code username} in cache.
*
* @param username username
*/
public void incrementNewMessageCountFor(String username) {
Element cacheElementForUser = userDataCache.get(username);
if (cacheElementForUser != null) {
int count = (Integer) cacheElementForUser.getValue();
userDataCache.put(new Element(username, ++count));
}
}
/**
* Decrement new messages count for {@code username} in cache.
*
* @param username username
*/
public void decrementNewMessageCountFor(String username) {
Element cacheElementForUser = userDataCache.get(username);
if (cacheElementForUser != null) {
int count = (Integer) cacheElementForUser.getValue();
userDataCache.put(new Element(username, --count));
}
}
}