shiro 实现 sessionDAO保存到redis里,通过日志,shiro不断的去doUpdate或doReadSession。一个普通的JSP页面,标签for循环,导致几十次读写,影响性能?
有这方面解决办法没有?
shiro reids session 集群问题
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- manker 2016-05-17 07:49关注
public class RedisSessionDAO extends AbstractSessionDAO {
private static Logger logger = Logger.getLogger(RedisSessionDAO.class); /** * shiro-redis的session对象前缀 */ private RedisManager redisManager; /** * The Redis key prefix for the sessions */ private String keyPrefix = "shiro_redis_session:"; @Override public void update(Session session) throws UnknownSessionException { logger.debug("update:" + JSON.toJSONString(session)); this.saveSession(session); } /** * save session * @param session * @throws UnknownSessionException */ private void saveSession(Session session) throws UnknownSessionException { if(session == null || session.getId() == null){ logger.error("session or session id is null"); return; } logger.debug("*******save session key="+session.getId()+"--->"+ redisManager.getExpire()); byte[] key = getByteKey(session.getId()); byte[] value = SerializeUtils.serialize(session); session.setTimeout(redisManager.getExpire()*1000); this.redisManager.set(key, value, redisManager.getExpire()); } @Override public void delete(Session session) { if(session == null || session.getId() == null){ logger.error("session or session id is null"); return; } logger.debug("*******remove session key="+session.getId()+"--->"+ redisManager.getExpire()); redisManager.del(this.getByteKey(session.getId())); } //用来统计当前活动的session @Override public Collection<Session> getActiveSessions() { Set<Session> sessions = new HashSet<Session>(); Set<byte[]> keys = redisManager.keys(this.keyPrefix + "*"); if(keys != null && keys.size()>0){ for(byte[] key:keys){ Session s = (Session)SerializeUtils.deserialize(redisManager.get(key)); sessions.add(s); } } return sessions; } @Override protected Serializable doCreate(Session session) { Serializable sessionId = this.generateSessionId(session); this.assignSessionId(session, sessionId); this.saveSession(session); logger.debug("doCreate\n"+ JSON.toJSONString(session)); return sessionId; } @Override protected Session doReadSession(Serializable sessionId) { if(sessionId == null){ logger.error("session id is null"); return null; } Session session = (Session)SerializeUtils.deserialize(redisManager.get(this.getByteKey(sessionId))); logger.debug("doReadSession:"+ JSON.toJSONString(session)); return session; } /** * 获得byte[]型的key * @param sessionId * @return */ private byte[] getByteKey(Serializable sessionId){ String preKey = this.keyPrefix + sessionId; return preKey.getBytes(); } public RedisManager getRedisManager() { return redisManager; } public void setRedisManager(RedisManager redisManager) { this.redisManager = redisManager; /** * 初始化redisManager */ this.redisManager.init(); } /** * Returns the Redis session keys * prefix. * @return The prefix */ public String getKeyPrefix() { return keyPrefix; } /** * Sets the Redis sessions key * prefix. * @param keyPrefix The prefix */ public void setKeyPrefix(String keyPrefix) { this.keyPrefix = keyPrefix; }
}
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