It's interesting to write a time-out with Redis.

Public long Getsessionidbyuserid (long systemid, long Customeruserid) {
if (Customeruserid = = null) {
Loggerhelper.info (This.getclass (), "Custom user ID is null.");
return default_session_id;
    }

Long sessionId = GetSessionID (string.valueof (Customeruserid)); ------Determine if the user has a session record 
if (sessionId = = null) { --------create a new record into the database At the same time feedback SessionID 
querysession session = new Querysession (SystemID, Customeruserid); 
Querysessiondao.save (session);

sessionId = Session.getid ();
    }

Putsessionid (string.valueof (Customeruserid), sessionId, session_expire_minutes); Place SessionID and time-outs into Redis-----------more meaning 

return sessionId;
}

Into Redis

private void Putsessionid (String userName, Long sessionId, int expireafterminutes) {
if (UserName = = NULL | | sessionId = = NULL) {
return;
    }
valuedata valuedata = new Valuedata (sessionId, system.currenttimemillis () + expireafterminutes * * *) ; -------- Create a record SessionID and timeout point in time 
redistemplate.boundhashops (Query_session_key). Put (UserName, valuedata);
}

Then take Redis judgment function

 private Long GetSessionID (String userName) {  
  Valuedata value = (valuedata) Redistemplate.boundhashops (Query_session_key). get (UserName);  
  if (value = = null) { 
  
  if (System.currentt Imemillis () > Expiretimemillion) {--------------verify if it's over this point in time ~ ~ ~   

        Redistemplate.boundhashops (query_session_key). Delete (UserName);
        return null;
    } else {
        return Value.sessionid;
    }
}

Simulated Timeout Request ~ ~ ~

It's interesting to write a time-out with Redis.