diff --git a/servlet/auth-servlet.go b/servlet/auth-servlet.go
index 6dc765b..4b31a9d 100644
--- a/servlet/auth-servlet.go
+++ b/servlet/auth-servlet.go
@@ -27,7 +27,7 @@ type AuthServlet interface {
 
 type AuthServlets struct {
 	ogrs.RPCServlets
-	connections sync.Map
+	sessions sync.Map
 }
 
 func (s *AuthServlets) Init(serverCtx server.ServerCtx) error {
@@ -132,7 +132,7 @@ func (s *AuthServlets) OnConnect(servletCtx server.ServletCtx, conn socket.Conn)
 	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
 	targetID := servletCtx.GetAttribute(og.SessionTargetIDKey)
 	if nil != sessionID && nil != targetID {
-		s.connections.Store(sessionID.(string), retainConnection(targetID.(string), servletCtx))
+		s.sessions.Store(sessionID.(string), ogrs.RetainSession(targetID.(string), servletCtx))
 	}
 }
 
@@ -141,7 +141,7 @@ func (s *AuthServlets) OnDisconnect(servletCtx server.ServletCtx) {
 
 	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
 	if nil != sessionID {
-		s.connections.Delete(sessionID.(string))
+		s.sessions.Delete(sessionID.(string))
 	}
 }
 
@@ -156,13 +156,13 @@ func (s *AuthServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeChan
 			switch msg.TargetType {
 			case ogs.PROBE:
 				for _, targetID := range msg.Targets {
-					_connections := s.getProbeConnections(targetID)
-					if nil == _connections || 0 == len(_connections) {
+					_sessions := s.getAuthSessions(targetID)
+					if nil == _sessions || 0 == len(_sessions) {
 						break
 					}
 
-					for _, _connection := range _connections {
-						_writeChan := _connection.servletCtx.GetAttribute(og.SessionWriteChanKey)
+					for _, _session := range _sessions {
+						_writeChan := _session.ServletCtx.GetAttribute(og.SessionWriteChanKey)
 						if nil != _writeChan {
 							writeChan := _writeChan.(chan<- []byte)
 							writeChan <- msg.Message
@@ -175,34 +175,16 @@ func (s *AuthServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeChan
 	}
 }
 
-func (s *AuthServlets) getProbeConnections(targetID string) []*connection {
-	var connections []*connection
+func (s *AuthServlets) getAuthSessions(targetID string) []*ogrs.Session {
+	var sessions []*ogrs.Session
 
-	s.connections.Range(func(k, v interface{}) bool {
-		_connection := v.(*connection)
-		if _connection.targetID == targetID {
-			connections = append(connections, _connection)
+	s.sessions.Range(func(k, v interface{}) bool {
+		session := v.(*ogrs.Session)
+		if session.TargetID == targetID {
+			sessions = append(sessions, session)
 		}
 		return true
 	})
 
-	return connections
-}
-
-type connection struct {
-	targetID   string
-	servletCtx server.ServletCtx
-}
-
-var connectionPool sync.Pool
-
-func retainConnection(targetID string, servletCtx server.ServletCtx) *connection {
-	return nil
-}
-
-func releaseConnection(_connection *connection) {
-	_connection.targetID = ""
-	_connection.servletCtx = nil
-
-	connectionPool.Put(_connection)
+	return sessions
 }
diff --git a/servlet/probe-servlet.go b/servlet/probe-servlet.go
index 16a82f4..9b57490 100644
--- a/servlet/probe-servlet.go
+++ b/servlet/probe-servlet.go
@@ -113,7 +113,7 @@ func (s *ProbeServlets) OnConnect(servletCtx server.ServletCtx, conn socket.Conn
 	sessionID := servletCtx.GetAttribute(og.SessionIDKey)
 	targetID := servletCtx.GetAttribute(og.SessionTargetIDKey)
 	if nil != sessionID && nil != targetID {
-		s.connections.Store(sessionID.(string), retainConnection(targetID.(string), servletCtx))
+		s.connections.Store(sessionID.(string), ogrs.RetainSession(targetID.(string), servletCtx))
 	}
 }
 
@@ -137,13 +137,13 @@ func (s *ProbeServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeCha
 			switch msg.TargetType {
 			case ogs.PROBE:
 				for _, targetID := range msg.Targets {
-					_connections := s.getProbeConnections(targetID)
-					if nil == _connections || 0 == len(_connections) {
+					_sessions := s.getProbeSessions(targetID)
+					if nil == _sessions || 0 == len(_sessions) {
 						break
 					}
 
-					for _, _connection := range _connections {
-						_writeChan := _connection.servletCtx.GetAttribute(og.SessionWriteChanKey)
+					for _, _session := range _sessions {
+						_writeChan := _session.ServletCtx.GetAttribute(og.SessionWriteChanKey)
 						if nil != _writeChan {
 							writeChan := _writeChan.(chan<- []byte)
 							writeChan <- msg.Message
@@ -155,34 +155,16 @@ func (s *ProbeServlets) handleSubscribe(serverCtx server.ServerCtx, subscribeCha
 	}
 }
 
-func (s *ProbeServlets) getProbeConnections(targetID string) []*connection {
-	var connections []*connection
+func (s *ProbeServlets) getProbeSessions(targetID string) []*ogrs.Session {
+	var sessions []*ogrs.Session
 
 	s.connections.Range(func(k, v interface{}) bool {
-		_connection := v.(*connection)
-		if _connection.targetID == targetID {
-			connections = append(connections, _connection)
+		session := v.(*ogrs.Session)
+		if session.TargetID == targetID {
+			sessions = append(sessions, session)
 		}
 		return true
 	})
 
-	return connections
+	return sessions
 }
-
-//type connection struct {
-//	targetID   string
-//	servletCtx server.ServletCtx
-//}
-//
-//var connectionPool sync.Pool
-//
-//func retainConnection(targetID string, servletCtx server.ServletCtx) *connection {
-//	return nil
-//}
-//
-//func releaseConnection(_connection *connection) {
-//	_connection.targetID = ""
-//	_connection.servletCtx = nil
-//
-//	connectionPool.Put(_connection)
-//}