diff --git a/server_context.go b/server_context.go
new file mode 100644
index 0000000..8308fdd
--- /dev/null
+++ b/server_context.go
@@ -0,0 +1,20 @@
+package server
+
+import (
+	cuc "git.loafle.net/commons_go/util/context"
+)
+
+type ServerContext interface {
+	cuc.Context
+}
+
+type serverContext struct {
+	cuc.Context
+}
+
+func newServerContext() ServerContext {
+	sCTX := &serverContext{}
+	sCTX.Context = cuc.NewContext(nil)
+
+	return sCTX
+}
diff --git a/server_handler.go b/server_handler.go
index 3ed7127..3c37272 100644
--- a/server_handler.go
+++ b/server_handler.go
@@ -5,13 +5,14 @@ import (
 )
 
 type ServerHandler interface {
-	Listen() (net.Listener, error)
-	OnAccept(conn net.Conn) (net.Conn, error)
+	ServerContext() ServerContext
+	Init(serverCTX ServerContext) error
+	Listen(serverCTX ServerContext) (net.Listener, error)
+	OnStart(serverCTX ServerContext)
 
-	OnStart()
-	OnStop()
+	OnError(serverCTX ServerContext, conn net.Conn, status int, reason error)
 
-	Handle(conn net.Conn, stopChan <-chan struct{}, doneChan chan<- struct{})
+	OnStop(serverCTX ServerContext)
 
 	IsClientDisconnect(err error) bool
 
diff --git a/server_handlers.go b/server_handlers.go
index fe7e2b7..0bd260e 100644
--- a/server_handlers.go
+++ b/server_handlers.go
@@ -10,18 +10,38 @@ import (
 type ServerHandlers struct {
 }
 
-func (sh *ServerHandlers) OnStart() {
+func (sh *ServerHandlers) ServerContext() ServerContext {
+
+}
+
+func (sh *ServerHandlers) Init(serverCTX ServerContext) error {
 	// no op
 }
 
-func (sh *ServerHandlers) OnStop() {
-	// no op
-}
-
-func (sh *ServerHandlers) Listen() (net.Listener, error) {
+func (sh *ServerHandlers) Listen(serverCTX ServerContext) (net.Listener, error) {
 	return nil, errors.New("Server: Handler method[Listen] of Server is not implement")
 }
 
+func (sh *ServerHandlers) OnStart(serverCTX ServerContext) {
+	// no op
+}
+
+func (sh *ServerHandlers) OnAccept(conn net.Conn) (net.Conn, error) {
+
+}
+
+func (sh *ServerHandlers) Handle(serverCTX ServerContext, conn net.Conn, stopChan <-chan struct{}, doneChan chan<- struct{}) {
+
+}
+
+func (sh *ServerHandlers) OnError(serverCTX ServerContext, conn net.Conn, status int, reason error) {
+
+}
+
+func (sh *ServerHandlers) OnStop(serverCTX ServerContext) {
+	// no op
+}
+
 func (sh *ServerHandlers) OnAccept(conn net.Conn) (net.Conn, error) {
 	return conn, nil
 }
diff --git a/socket.go b/socket.go
new file mode 100644
index 0000000..07c9111
--- /dev/null
+++ b/socket.go
@@ -0,0 +1,75 @@
+package server
+
+import (
+	"io"
+	"net"
+	"sync"
+	"time"
+
+)
+
+type Socket interface {
+	// ID returns the identity of the client.
+	ID() string
+	Context() SocketContext
+
+	net.Conn
+}
+
+func newSocket(socketHandler SocketHandler, socketCTX SocketContext, conn net.Conn, id string) Socket {
+	s := retainSocket()
+	s.Conn = conn
+	s.sh = socketHandler
+	s.id = id
+	s.SetReadLimit(socketHandler.GetMaxMessageSize())
+	if 0 < socketHandler.GetReadTimeout() {
+		s.SetReadDeadline(time.Now().Add(socketHandler.GetReadTimeout() * time.Second))
+	}
+	s.ctx = socketCTX
+
+	return s
+}
+
+type netSocket struct {
+	net.Conn
+
+	ctx SocketContext
+	sh  SocketHandler
+
+	id string
+
+	// sc *SocketConn
+}
+
+func (s *netSocket) Context() SocketContext {
+	return s.ctx
+}
+
+func (s *netSocket) ID() string {
+	return s.id
+}
+
+
+func (s *netSocket) Close() error {
+	err := s.Conn.Close()
+	releaseSocket(s)
+	return err
+}
+
+var socketPool sync.Pool
+
+func retainSocket() *netSocket {
+	v := socketPool.Get()
+	if v == nil {
+		return &netSocket{}
+	}
+	return v.(*netSocket)
+}
+
+func releaseSocket(s *netSocket) {
+	s.sh = nil
+	s.ctx = nil
+	s.id = ""
+
+	socketPool.Put(s)
+}
diff --git a/socket_context.go b/socket_context.go
new file mode 100644
index 0000000..54778f4
--- /dev/null
+++ b/socket_context.go
@@ -0,0 +1,28 @@
+package server
+
+import (
+	cuc "git.loafle.net/commons_go/util/context"
+)
+
+type SocketContext interface {
+	cuc.Context
+	ServerContext() ServerContext
+}
+
+func newSocketContext(serverCTX ServerContext) SocketContext {
+	sCTX := &socketContext{}
+	sCTX.Context = cuc.NewContext(serverCTX)
+	sCTX.serverCTX = serverCTX
+
+	return sCTX
+}
+
+type socketContext struct {
+	cuc.Context
+
+	serverCTX ServerContext
+}
+
+func (sc *socketContext) ServerContext() ServerContext {
+	return sc.serverCTX
+}
diff --git a/socket_handler.go b/socket_handler.go
new file mode 100644
index 0000000..312836c
--- /dev/null
+++ b/socket_handler.go
@@ -0,0 +1,70 @@
+package server
+
+import (
+	"net"
+	"time"
+)
+
+type SocketHandler interface {
+	SocketContext(serverCTX ServerContext) SocketContext
+	// Init invoked when server is stated
+	// If you override ths method, must call
+	//
+	// func (sh *SocketHandler) Init() error {
+	// 	if err := sh.SocketHandlers.Init(); nil != err {
+	// 		return err
+	// 	}
+	//  ...
+	//  ...
+	// 	return nil
+	// }
+	Init(serverCTX ServerContext) error
+	// Handshake do handshake client and server
+	// id is identity of client socket. if id is "", disallow connection
+	Handshake(serverCTX ServerContext, conn net.Conn) (id string)
+	// OnConnect invoked when client is connected
+	// If you override ths method, must call
+	//
+	// func (sh *SocketHandler) OnConnect(soc cwf.Socket) cwf.Socket {
+	//  soc = sh.SocketHandlers.OnConnect(newSoc)
+	//  newSoc := ...
+	// 	return newSoc
+	// }
+	OnConnect(soc Socket)
+	Handle(soc Socket, stopChan <-chan struct{}, doneChan chan<- error)
+	// OnDisconnect invoked when client is disconnected
+	// If you override ths method, must call
+	//
+	// func (sh *SocketHandler) OnDisconnect(soc cwf.Socket) {
+	//  ...
+	// 	sh.SocketHandlers.OnDisconnect(soc)
+	// }
+	OnDisconnect(soc Socket)
+	// Destroy invoked when server is stopped
+	// If you override ths method, must call
+	//
+	// func (sh *SocketHandler) Destroy() {
+	//  ...
+	// 	sh.SocketHandlers.Destroy()
+	// }
+	Destroy()
+
+	GetSocket(id string) Socket
+	GetSockets() map[string]Socket
+
+	GetMaxMessageSize() int64
+	GetWriteTimeout() time.Duration
+	GetReadTimeout() time.Duration
+
+	// Validate is check handler value
+	// If you override ths method, must call
+	//
+	// func (sh *SocketHandlers) Validate() {
+	// 	sh.SocketHandlers.Validate()
+	//  ...
+	// }
+	Validate()
+
+	addSocket(soc Socket)
+	removeSocket(soc Socket)
+}
diff --git a/socket_handlers.go b/socket_handlers.go
new file mode 100644
index 0000000..2216dfc
--- /dev/null
+++ b/socket_handlers.go
@@ -0,0 +1,92 @@
+package server
+
+import (
+	"net"
+	"time"
+)
+
+type SocketHandlers struct {
+	// MaxMessageSize is the maximum size for a message read from the peer. If a
+	// message exceeds the limit, the connection sends a close frame to the peer
+	// and returns ErrReadLimit to the application.
+	MaxMessageSize int64
+	// WriteTimeout is the write deadline on the underlying network
+	// connection. After a write has timed out, the websocket state is corrupt and
+	// all future writes will return an error. A zero value for t means writes will
+	// not time out.
+	WriteTimeout time.Duration
+	// ReadTimeout is the read deadline on the underlying network connection.
+	// After a read has timed out, the websocket connection state is corrupt and
+	// all future reads will return an error. A zero value for t means reads will
+	// not time out.
+	ReadTimeout time.Duration
+
+	sockets map[string]Socket
+}
+
+func (sh *SocketHandlers) Init(serverCTX ServerContext) error {
+	sh.sockets = make(map[string]Socket)
+
+	return nil
+}
+
+func (sh *SocketHandlers) Handshake(serverCTX ServerContext, conn net.Conn) (id string) {
+	return "", nil
+}
+
+func (sh *SocketHandlers) SocketContext(serverCTX ServerContext) SocketContext {
+	return newSocketContext(serverCTX)
+}
+
+func (sh *SocketHandlers) OnConnect(soc Socket) {
+	// no op
+}
+
+func (sh *SocketHandlers) Handle(soc Socket, stopChan <-chan struct{}, doneChan chan<- error) {
+	// no op
+}
+
+func (sh *SocketHandlers) OnDisconnect(soc Socket) {
+
+}
+
+func (sh *SocketHandlers) Destroy() {
+	// no op
+}
+
+func (sh *SocketHandlers) GetSocket(id string) Socket {
+	return sh.sockets[id]
+}
+func (sh *SocketHandlers) GetSockets() map[string]Socket {
+	return sh.sockets
+}
+
+func (sh *SocketHandlers) GetMaxMessageSize() int64 {
+	return sh.MaxMessageSize
+}
+func (sh *SocketHandlers) GetWriteTimeout() time.Duration {
+	return sh.WriteTimeout
+}
+func (sh *SocketHandlers) GetReadTimeout() time.Duration {
+	return sh.ReadTimeout
+}
+
+func (sh *SocketHandlers) Validate() {
+	if sh.MaxMessageSize <= 0 {
+		sh.MaxMessageSize = DefaultMaxMessageSize
+	}
+	if sh.WriteTimeout <= 0 {
+		sh.WriteTimeout = DefaultWriteTimeout
+	}
+	if sh.ReadTimeout <= 0 {
+		sh.ReadTimeout = DefaultReadTimeout
+	}
+}
+
+func (sh *SocketHandlers) addSocket(soc Socket) {
+	sh.sockets[soc.ID()] = soc
+}
+
+func (sh *SocketHandlers) removeSocket(soc Socket) {
+	delete(sh.sockets, soc.ID())
+}