diff --git a/connection/websocket/fasthttp/servlet_handlers.go b/connection/websocket/fasthttp/servlet_handlers.go
index d14b518..9e74b86 100644
--- a/connection/websocket/fasthttp/servlet_handlers.go
+++ b/connection/websocket/fasthttp/servlet_handlers.go
@@ -3,6 +3,7 @@ package fasthttp
 import (
 	"fmt"
 
+	"git.loafle.net/commons_go/rpc"
 	"git.loafle.net/commons_go/rpc/protocol"
 	"git.loafle.net/commons_go/websocket_fasthttp/websocket"
 )
@@ -10,7 +11,7 @@ import (
 type ServletHandlers struct {
 }
 
-func (sh *ServletHandlers) GetRequest(codec protocol.ServerCodec, reader interface{}) (protocol.ServerRequestCodec, error) {
+func (sh *ServletHandlers) GetRequest(servletCTX rpc.ServletContext, codec protocol.ServerCodec, reader interface{}) (protocol.ServerRequestCodec, error) {
 	conn := reader.(*websocket.Conn)
 	_, r, err := conn.NextReader()
 
@@ -19,7 +20,7 @@ func (sh *ServletHandlers) GetRequest(codec protocol.ServerCodec, reader interfa
 	return requestCodec, err
 }
 
-func (sh *ServletHandlers) SendResponse(requestCodec protocol.ServerRequestCodec, writer interface{}, result interface{}, err error) error {
+func (sh *ServletHandlers) SendResponse(servletCTX rpc.ServletContext, requestCodec protocol.ServerRequestCodec, writer interface{}, result interface{}, err error) error {
 	conn := writer.(*websocket.Conn)
 
 	wc, lerr := conn.NextWriter(websocket.TextMessage)
@@ -40,7 +41,7 @@ func (sh *ServletHandlers) SendResponse(requestCodec protocol.ServerRequestCodec
 	return fmt.Errorf("Servlet Handler: SendResponse is not implemented")
 }
 
-func (sh *ServletHandlers) SendNotification(codec protocol.ServerCodec, writer interface{}, method string, args ...interface{}) error {
+func (sh *ServletHandlers) SendNotification(servletCTX rpc.ServletContext, codec protocol.ServerCodec, writer interface{}, method string, args ...interface{}) error {
 	conn := writer.(*websocket.Conn)
 
 	wc, lerr := conn.NextWriter(websocket.TextMessage)
diff --git a/constants.go b/constants.go
index d38302b..4cd6c6c 100644
--- a/constants.go
+++ b/constants.go
@@ -1,5 +1,11 @@
 package rpc
 
+import cuc "git.loafle.net/commons_go/util/context"
+
 const (
 	DefaultPendingMessages = 32 * 1024
 )
+
+var (
+	ContentTypeKey = cuc.ContextKey("ContentType")
+)
diff --git a/servlet.go b/servlet.go
index 8679885..db24038 100644
--- a/servlet.go
+++ b/servlet.go
@@ -6,16 +6,17 @@ import (
 
 	"git.loafle.net/commons_go/logging"
 	"git.loafle.net/commons_go/rpc/protocol"
+	cuc "git.loafle.net/commons_go/util/context"
 )
 
-func NewServlet(servletCTX ServletContext, sh ServletHandler) Servlet {
+func NewServlet(sh ServletHandler) Servlet {
 	return &servlet{
 		sh: sh,
 	}
 }
 
 type Servlet interface {
-	Start(contentType string, reader interface{}, writer interface{}) error
+	Start(parentCTX cuc.Context, reader interface{}, writer interface{}) error
 	Stop()
 
 	Send(method string, args ...interface{}) (err error)
@@ -28,7 +29,6 @@ type servlet struct {
 	sh               ServletHandler
 	messageQueueChan chan *messageState
 
-	contentType string
 	reader      interface{}
 	writer      interface{}
 	serverCodec protocol.ServerCodec
@@ -37,7 +37,7 @@ type servlet struct {
 	stopWg   sync.WaitGroup
 }
 
-func (s *servlet) Start(contentType string, reader interface{}, writer interface{}) error {
+func (s *servlet) Start(parentCTX cuc.Context, reader interface{}, writer interface{}) error {
 	if nil == s.sh {
 		panic("Servlet: servlet handler must be specified.")
 	}
@@ -46,13 +46,13 @@ func (s *servlet) Start(contentType string, reader interface{}, writer interface
 	if s.stopChan != nil {
 		return fmt.Errorf("Servlet: servlet is already running. Stop it before starting it again")
 	}
+	servletCTX := s.sh.ServletContext(parentCTX)
 
-	sc, err := s.sh.getCodec(contentType)
+	sc, err := s.sh.getCodec(servletCTX.GetAttribute(ContentTypeKey).(string))
 	if nil != err {
 		return err
 	}
 
-	s.contentType = contentType
 	s.reader = reader
 	s.writer = writer
 	s.serverCodec = sc
@@ -81,7 +81,6 @@ func (s *servlet) Stop() {
 
 	s.messageQueueChan = nil
 
-	s.contentType = ""
 	s.reader = nil
 	s.writer = nil
 	s.serverCodec = nil
diff --git a/servlet_context.go b/servlet_context.go
index 606eb51..391f340 100644
--- a/servlet_context.go
+++ b/servlet_context.go
@@ -12,7 +12,7 @@ type servletContext struct {
 	cuc.Context
 }
 
-func NewServletContext(parent cuc.Context) ServletContext {
+func newServletContext(parent cuc.Context) ServletContext {
 	sCTX := &servletContext{}
 	sCTX.Context = cuc.NewContext(parent)
 
diff --git a/servlet_handler.go b/servlet_handler.go
index 6ad7776..d8f1d4a 100644
--- a/servlet_handler.go
+++ b/servlet_handler.go
@@ -1,8 +1,13 @@
 package rpc
 
-import "git.loafle.net/commons_go/rpc/protocol"
+import (
+	"git.loafle.net/commons_go/rpc/protocol"
+	cuc "git.loafle.net/commons_go/util/context"
+)
 
 type ServletHandler interface {
+	ServletContext(parent cuc.Context) ServletContext
+
 	Init(servletCTX ServletContext) error
 
 	GetRequest(servletCTX ServletContext, codec protocol.ServerCodec, reader interface{}) (protocol.ServerRequestCodec, error)
diff --git a/servlet_handlers.go b/servlet_handlers.go
index 6bb4250..57a8063 100644
--- a/servlet_handlers.go
+++ b/servlet_handlers.go
@@ -5,6 +5,7 @@ import (
 	"strings"
 
 	"git.loafle.net/commons_go/rpc/protocol"
+	cuc "git.loafle.net/commons_go/util/context"
 )
 
 type ServletHandlers struct {
@@ -20,6 +21,10 @@ type ServletHandlers struct {
 	codecs map[string]protocol.ServerCodec
 }
 
+func (sh *ServletHandlers) ServletContext(parent cuc.Context) ServletContext {
+	return newServletContext(parent)
+}
+
 func (sh *ServletHandlers) Init(servletCTX ServletContext) error {
 	return nil
 }