diff --git a/rust-lib/flowy-sys/Cargo.toml b/rust-lib/flowy-sys/Cargo.toml
index 88cc9549b1..23728a4d63 100644
--- a/rust-lib/flowy-sys/Cargo.toml
+++ b/rust-lib/flowy-sys/Cargo.toml
@@ -13,7 +13,7 @@ futures-channel = "0.3.15"
 futures = "0.3.15"
 futures-util = "0.3.15"
 bytes = "0.5"
-
+tokio = { version = "1", features = ["sync"] }
 
 [dev-dependencies]
 tokio = { version = "1", features = ["full"] }
\ No newline at end of file
diff --git a/rust-lib/flowy-sys/src/data/container.rs b/rust-lib/flowy-sys/src/data/container.rs
index 4fb5e29df2..2d512c0586 100644
--- a/rust-lib/flowy-sys/src/data/container.rs
+++ b/rust-lib/flowy-sys/src/data/container.rs
@@ -1,8 +1,6 @@
 use std::{
     any::{Any, TypeId},
     collections::HashMap,
-    fmt,
-    mem,
 };
 
 #[derive(Default)]
@@ -23,6 +21,22 @@ impl DataContainer {
             .insert(TypeId::of::<T>(), Box::new(val))
             .and_then(downcast_owned)
     }
+
+    pub fn remove<T: 'static>(&mut self) -> Option<T> { self.map.remove(&TypeId::of::<T>()).and_then(downcast_owned) }
+
+    pub fn get<T: 'static>(&self) -> Option<&T> {
+        self.map.get(&TypeId::of::<T>()).and_then(|boxed| boxed.downcast_ref())
+    }
+
+    pub fn get_mut<T: 'static>(&mut self) -> Option<&mut T> {
+        self.map
+            .get_mut(&TypeId::of::<T>())
+            .and_then(|boxed| boxed.downcast_mut())
+    }
+
+    pub fn contains<T: 'static>(&self) -> bool { self.map.contains_key(&TypeId::of::<T>()) }
+
+    pub fn extend(&mut self, other: DataContainer) { self.map.extend(other.map); }
 }
 
 fn downcast_owned<T: 'static>(boxed: Box<dyn Any>) -> Option<T> { boxed.downcast().ok().map(|boxed| *boxed) }
diff --git a/rust-lib/flowy-sys/src/data/mod.rs b/rust-lib/flowy-sys/src/data/mod.rs
index 13791c98c2..18581c4bb7 100644
--- a/rust-lib/flowy-sys/src/data/mod.rs
+++ b/rust-lib/flowy-sys/src/data/mod.rs
@@ -1,2 +1 @@
 pub mod container;
-pub mod payload;
diff --git a/rust-lib/flowy-sys/src/error.rs b/rust-lib/flowy-sys/src/error.rs
deleted file mode 100644
index b245716630..0000000000
--- a/rust-lib/flowy-sys/src/error.rs
+++ /dev/null
@@ -1,150 +0,0 @@
-use crate::response::{FlowyResponse, StatusCode};
-use std::cell::RefCell;
-use std::fmt;
-
-pub struct Error {
-    inner: Box<dyn HandlerError>,
-}
-
-impl Error {
-    pub fn as_handler_error(&self) -> &dyn HandlerError {
-        self.inner.as_ref()
-    }
-}
-
-impl fmt::Display for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(&self.inner, f)
-    }
-}
-
-impl fmt::Debug for Error {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{:?}", &self.inner)
-    }
-}
-
-impl std::error::Error for Error {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
-        None
-    }
-
-    fn cause(&self) -> Option<&dyn std::error::Error> {
-        None
-    }
-}
-
-impl From<Error> for FlowyResponse {
-    fn from(err: Error) -> Self {
-        FlowyResponse::from_error(err)
-    }
-}
-
-impl From<FlowyResponse> for Error {
-    fn from(res: FlowyResponse) -> Error {
-        InternalError::from_response("", res).into()
-    }
-}
-
-/// `Error` for any error that implements `ResponseError`
-impl<T: HandlerError + 'static> From<T> for Error {
-    fn from(err: T) -> Error {
-        Error {
-            inner: Box::new(err),
-        }
-    }
-}
-
-pub trait HandlerError: fmt::Debug + fmt::Display {
-    fn status_code(&self) -> StatusCode;
-
-    fn as_response(&self) -> FlowyResponse {
-        let resp = FlowyResponse::new(self.status_code());
-        resp
-    }
-}
-
-pub struct InternalError<T> {
-    inner: T,
-    status: InternalErrorType,
-}
-
-enum InternalErrorType {
-    Status(StatusCode),
-    Response(RefCell<Option<FlowyResponse>>),
-}
-
-impl<T> InternalError<T> {
-    pub fn new(inner: T, status: StatusCode) -> Self {
-        InternalError {
-            inner,
-            status: InternalErrorType::Status(status),
-        }
-    }
-
-    pub fn from_response(inner: T, response: FlowyResponse) -> Self {
-        InternalError {
-            inner,
-            status: InternalErrorType::Response(RefCell::new(Some(response))),
-        }
-    }
-}
-
-impl<T> fmt::Debug for InternalError<T>
-where
-    T: fmt::Debug + 'static,
-{
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Debug::fmt(&self.inner, f)
-    }
-}
-
-impl<T> fmt::Display for InternalError<T>
-where
-    T: fmt::Display + 'static,
-{
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(&self.inner, f)
-    }
-}
-
-impl<T> HandlerError for InternalError<T>
-where
-    T: fmt::Debug + fmt::Display + 'static,
-{
-    fn status_code(&self) -> StatusCode {
-        match self.status {
-            InternalErrorType::Status(st) => st,
-            InternalErrorType::Response(ref resp) => {
-                if let Some(resp) = resp.borrow().as_ref() {
-                    resp.status.clone()
-                } else {
-                    StatusCode::Error
-                }
-            }
-        }
-    }
-
-    fn as_response(&self) -> FlowyResponse {
-        panic!()
-        // match self.status {
-        //     InternalErrorType::Status(st) => {
-        //         let mut res = Response::new(st);
-        //         let mut buf = BytesMut::new();
-        //         let _ = write!(Writer(&mut buf), "{}", self);
-        //         res.headers_mut().insert(
-        //             header::CONTENT_TYPE,
-        //             header::HeaderValue::from_static("text/plain; charset=utf-8"),
-        //         );
-        //         res.set_body(Body::from(buf))
-        //     }
-        //     InternalErrorType::Response(ref resp) => {
-        //         if let Some(resp) = resp.borrow_mut().take() {
-        //             resp
-        //         } else {
-        //             Response::new(StatusCode::INTERNAL_SERVER_ERROR)
-        //         }
-        //     }
-        // }
-    }
-}
diff --git a/rust-lib/flowy-sys/src/error/error.rs b/rust-lib/flowy-sys/src/error/error.rs
new file mode 100644
index 0000000000..e545971f61
--- /dev/null
+++ b/rust-lib/flowy-sys/src/error/error.rs
@@ -0,0 +1,38 @@
+use crate::response::{FlowyResponse, StatusCode};
+use std::{cell::RefCell, fmt};
+
+pub trait Error: fmt::Debug + fmt::Display {
+    fn status_code(&self) -> StatusCode;
+
+    fn as_response(&self) -> FlowyResponse { FlowyResponse::new(self.status_code()) }
+}
+
+impl<T: Error + 'static> From<T> for SystemError {
+    fn from(err: T) -> SystemError { SystemError { inner: Box::new(err) } }
+}
+
+pub struct SystemError {
+    inner: Box<dyn Error>,
+}
+
+impl SystemError {
+    pub fn inner_error(&self) -> &dyn Error { self.inner.as_ref() }
+}
+
+impl fmt::Display for SystemError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { fmt::Display::fmt(&self.inner, f) }
+}
+
+impl fmt::Debug for SystemError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { write!(f, "{:?}", &self.inner) }
+}
+
+impl std::error::Error for SystemError {
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> { None }
+
+    fn cause(&self) -> Option<&dyn std::error::Error> { None }
+}
+
+impl From<SystemError> for FlowyResponse {
+    fn from(err: SystemError) -> Self { err.inner_error().as_response() }
+}
diff --git a/rust-lib/flowy-sys/src/error/mod.rs b/rust-lib/flowy-sys/src/error/mod.rs
new file mode 100644
index 0000000000..3925f93ff7
--- /dev/null
+++ b/rust-lib/flowy-sys/src/error/mod.rs
@@ -0,0 +1,3 @@
+mod error;
+
+pub use error::*;
diff --git a/rust-lib/flowy-sys/src/handler/dispatch.rs b/rust-lib/flowy-sys/src/handler/dispatch.rs
deleted file mode 100644
index 6179bd7bbd..0000000000
--- a/rust-lib/flowy-sys/src/handler/dispatch.rs
+++ /dev/null
@@ -1,65 +0,0 @@
-use crate::{
-    error::Error,
-    handler::{boxed, BoxServiceFactory, Handler, HandlerService},
-    request::FromRequest,
-    response::Responder,
-    service::{ServiceRequest, ServiceResponse},
-};
-
-use std::{
-    future::Future,
-    pin::Pin,
-    task::{Context, Poll},
-};
-
-pub struct HandlerDispatch {
-    service: BoxServiceFactory<(), ServiceRequest, ServiceResponse, Error, ()>,
-}
-
-impl HandlerDispatch {
-    pub fn new<H, T, R>(handler: H) -> Self
-    where
-        H: Handler<T, R>,
-        T: FromRequest + 'static,
-        R: Future + 'static,
-        R::Output: Responder + 'static,
-    {
-        HandlerDispatch {
-            service: boxed::factory(HandlerService::new(handler)),
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::{payload::Payload, request::FlowyRequest, service::ServiceFactory};
-
-    pub async fn no_params() -> String {
-        println!("no params");
-        "hello".to_string()
-    }
-    #[tokio::test]
-    async fn extract_no_params() {
-        let dispatch = HandlerDispatch::new(no_params);
-        let resp = response_from_dispatch(dispatch).await;
-    }
-
-    pub async fn one_params(s: String) -> String {
-        println!("one params");
-        "hello".to_string()
-    }
-
-    #[tokio::test]
-    async fn extract_one_params() {
-        let dispatch = HandlerDispatch::new(one_params);
-        let resp = response_from_dispatch(dispatch).await;
-    }
-
-    async fn response_from_dispatch(dispatch: HandlerDispatch) -> ServiceResponse {
-        let service = dispatch.service.new_service(()).await.unwrap();
-        let service_request = ServiceRequest::new(FlowyRequest::default(), Payload::None);
-        let resp = service.call(service_request).await.unwrap();
-        resp
-    }
-}
diff --git a/rust-lib/flowy-sys/src/lib.rs b/rust-lib/flowy-sys/src/lib.rs
index 1502ae6655..931712c2c2 100644
--- a/rust-lib/flowy-sys/src/lib.rs
+++ b/rust-lib/flowy-sys/src/lib.rs
@@ -1,7 +1,6 @@
 mod data;
 mod error;
-mod handler;
-mod payload;
+mod module;
 mod request;
 mod response;
 mod service;
diff --git a/rust-lib/flowy-sys/src/module/data.rs b/rust-lib/flowy-sys/src/module/data.rs
new file mode 100644
index 0000000000..0c07d1b044
--- /dev/null
+++ b/rust-lib/flowy-sys/src/module/data.rs
@@ -0,0 +1,36 @@
+use crate::{
+    error::SystemError,
+    request::{payload::Payload, FlowyRequest, FromRequest},
+    util::ready::Ready,
+};
+use std::{ops::Deref, sync::Arc};
+
+pub struct ModuleData<T: ?Sized>(Arc<T>);
+
+impl<T> ModuleData<T> {
+    pub fn new(data: T) -> Self { ModuleData(Arc::new(data)) }
+
+    pub fn get_ref(&self) -> &T { self.0.as_ref() }
+}
+
+impl<T: ?Sized> Deref for ModuleData<T> {
+    type Target = Arc<T>;
+
+    fn deref(&self) -> &Arc<T> { &self.0 }
+}
+
+impl<T: ?Sized> Clone for ModuleData<T> {
+    fn clone(&self) -> ModuleData<T> { ModuleData(self.0.clone()) }
+}
+
+impl<T: ?Sized> From<Arc<T>> for ModuleData<T> {
+    fn from(arc: Arc<T>) -> Self { ModuleData(arc) }
+}
+
+impl<T: ?Sized + 'static> FromRequest for ModuleData<T> {
+    type Error = SystemError;
+    type Future = Ready<Result<Self, SystemError>>;
+
+    #[inline]
+    fn from_request(req: &FlowyRequest, _: &mut Payload) -> Self::Future { unimplemented!() }
+}
diff --git a/rust-lib/flowy-sys/src/module/mod.rs b/rust-lib/flowy-sys/src/module/mod.rs
new file mode 100644
index 0000000000..b37a3cf92a
--- /dev/null
+++ b/rust-lib/flowy-sys/src/module/mod.rs
@@ -0,0 +1,5 @@
+mod data;
+mod module;
+
+pub use data::*;
+pub use module::*;
diff --git a/rust-lib/flowy-sys/src/module/module.rs b/rust-lib/flowy-sys/src/module/module.rs
new file mode 100644
index 0000000000..86ec74dbf8
--- /dev/null
+++ b/rust-lib/flowy-sys/src/module/module.rs
@@ -0,0 +1,115 @@
+use crate::{
+    data::container::DataContainer,
+    error::SystemError,
+    module::ModuleData,
+    request::FromRequest,
+    response::Responder,
+    service::{BoxService, Handler, Service, ServiceFactory, ServiceRequest, ServiceResponse},
+};
+
+use futures_core::{future::LocalBoxFuture, ready};
+use std::{
+    collections::HashMap,
+    future::Future,
+    hash::Hash,
+    marker::PhantomData,
+    pin::Pin,
+    rc::Rc,
+    task::{Context, Poll},
+};
+use tokio::sync::{mpsc, mpsc::UnboundedReceiver};
+
+use crate::{
+    request::{payload::Payload, FlowyRequest},
+    service::{factory, BoxServiceFactory, HandlerService},
+};
+use pin_project::pin_project;
+use std::fmt::Debug;
+
+pub type Command = String;
+pub type ModuleServiceFactory = BoxServiceFactory<(), ServiceRequest, ServiceResponse, SystemError>;
+
+#[pin_project::pin_project]
+pub struct Module {
+    name: String,
+    data: DataContainer,
+    fact_map: HashMap<Command, ModuleServiceFactory>,
+    cmd_rx: UnboundedReceiver<FlowyRequest>,
+}
+
+impl Module {
+    pub fn new(cmd_rx: UnboundedReceiver<FlowyRequest>) -> Self {
+        Self {
+            name: "".to_owned(),
+            data: DataContainer::new(),
+            fact_map: HashMap::new(),
+            cmd_rx,
+        }
+    }
+
+    pub fn name(mut self, s: &str) -> Self {
+        self.name = s.to_owned();
+        self
+    }
+
+    pub fn data<D: 'static>(mut self, data: D) -> Self {
+        let module_data = ModuleData::new(data);
+        self.data.insert(module_data);
+        self
+    }
+
+    pub fn event<H, T, R>(mut self, command: Command, handler: H) -> Self
+    where
+        H: Handler<T, R>,
+        T: FromRequest + 'static,
+        R: Future + 'static,
+        R::Output: Responder + 'static,
+    {
+        self.fact_map.insert(command, factory(HandlerService::new(handler)));
+        self
+    }
+}
+
+impl Future for Module {
+    type Output = ();
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        loop {
+            match ready!(Pin::new(&mut self.cmd_rx).poll_recv(cx)) {
+                None => return Poll::Ready(()),
+                Some(request) => match self.fact_map.get(request.get_id()) {
+                    Some(factory) => {
+                        let service_future = factory.new_service(());
+                        tokio::task::spawn_local(ModuleServiceFuture {
+                            request,
+                            service_future,
+                        });
+                    },
+                    None => {},
+                },
+            }
+        }
+    }
+}
+
+#[pin_project(project = HandlerServiceProj)]
+pub struct ModuleServiceFuture<Service, Error> {
+    request: FlowyRequest,
+    #[pin]
+    service_future: LocalBoxFuture<'static, Result<Service, Error>>,
+}
+
+impl<Service, Error> Future for ModuleServiceFuture<Service, Error> {
+    type Output = ();
+
+    fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> { unimplemented!() }
+}
+
+impl ServiceFactory<ServiceRequest> for Module {
+    type Response = ServiceResponse;
+    type Error = SystemError;
+    type Service = BoxService<ServiceRequest, ServiceResponse, SystemError>;
+    type Config = ();
+    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::Error>>;
+
+    fn new_service(&self, cfg: Self::Config) -> Self::Future { unimplemented!() }
+}
diff --git a/rust-lib/flowy-sys/src/request/mod.rs b/rust-lib/flowy-sys/src/request/mod.rs
index 3edd9a21fa..cab7b63efc 100644
--- a/rust-lib/flowy-sys/src/request/mod.rs
+++ b/rust-lib/flowy-sys/src/request/mod.rs
@@ -1,3 +1,4 @@
-mod request;
-
 pub use request::*;
+
+pub mod payload;
+mod request;
diff --git a/rust-lib/flowy-sys/src/data/payload.rs b/rust-lib/flowy-sys/src/request/payload.rs
similarity index 100%
rename from rust-lib/flowy-sys/src/data/payload.rs
rename to rust-lib/flowy-sys/src/request/payload.rs
diff --git a/rust-lib/flowy-sys/src/request/request.rs b/rust-lib/flowy-sys/src/request/request.rs
index 13f5e5b597..a0a839708c 100644
--- a/rust-lib/flowy-sys/src/request/request.rs
+++ b/rust-lib/flowy-sys/src/request/request.rs
@@ -1,18 +1,26 @@
-use crate::{
-    error::Error,
-    payload::Payload,
-    util::ready::{ready, Ready},
-};
 use std::future::Future;
 
-pub struct FlowyRequest {}
+use crate::{
+    error::SystemError,
+    request::payload::Payload,
+    util::ready::{ready, Ready},
+};
+use std::hash::Hash;
+
+pub struct FlowyRequest {
+    id: String,
+}
+
+impl FlowyRequest {
+    pub fn get_id(&self) -> &str { &self.id }
+}
 
 impl std::default::Default for FlowyRequest {
-    fn default() -> Self { Self {} }
+    fn default() -> Self { Self { id: "".to_string() } }
 }
 
 pub trait FromRequest: Sized {
-    type Error: Into<Error>;
+    type Error: Into<SystemError>;
     type Future: Future<Output = Result<Self, Self::Error>>;
 
     fn from_request(req: &FlowyRequest, payload: &mut Payload) -> Self::Future;
@@ -20,16 +28,16 @@ pub trait FromRequest: Sized {
 
 #[doc(hidden)]
 impl FromRequest for () {
-    type Error = Error;
-    type Future = Ready<Result<(), Error>>;
+    type Error = SystemError;
+    type Future = Ready<Result<(), SystemError>>;
 
-    fn from_request(req: &FlowyRequest, payload: &mut Payload) -> Self::Future { ready(Ok(())) }
+    fn from_request(_req: &FlowyRequest, _payload: &mut Payload) -> Self::Future { ready(Ok(())) }
 }
 
 #[doc(hidden)]
 impl FromRequest for String {
-    type Error = Error;
-    type Future = Ready<Result<String, Error>>;
+    type Error = SystemError;
+    type Future = Ready<Result<String, SystemError>>;
 
-    fn from_request(req: &FlowyRequest, payload: &mut Payload) -> Self::Future { ready(Ok("".to_string())) }
+    fn from_request(_req: &FlowyRequest, _payload: &mut Payload) -> Self::Future { ready(Ok("".to_string())) }
 }
diff --git a/rust-lib/flowy-sys/src/response/builder.rs b/rust-lib/flowy-sys/src/response/builder.rs
index 6fccbb70bf..c5c24df334 100644
--- a/rust-lib/flowy-sys/src/response/builder.rs
+++ b/rust-lib/flowy-sys/src/response/builder.rs
@@ -1,19 +1,19 @@
-use crate::error::Error;
-use crate::response::{FlowyResponse, ResponseData, StatusCode};
+use crate::{
+    error::SystemError,
+    response::{data::ResponseData, FlowyResponse, StatusCode},
+};
 
 macro_rules! static_response {
     ($name:ident, $status:expr) => {
         #[allow(non_snake_case, missing_docs)]
-        pub fn $name() -> FlowyResponseBuilder {
-            FlowyResponseBuilder::new($status)
-        }
+        pub fn $name() -> FlowyResponseBuilder { FlowyResponseBuilder::new($status) }
     };
 }
 
 pub struct FlowyResponseBuilder<T = ResponseData> {
     pub data: T,
     pub status: StatusCode,
-    pub error: Option<Error>,
+    pub error: Option<SystemError>,
 }
 
 impl FlowyResponseBuilder {
@@ -30,7 +30,7 @@ impl FlowyResponseBuilder {
         self
     }
 
-    pub fn error(mut self, error: Option<Error>) -> Self {
+    pub fn error(mut self, error: Option<SystemError>) -> Self {
         self.error = error;
         self
     }
diff --git a/rust-lib/flowy-sys/src/response/data.rs b/rust-lib/flowy-sys/src/response/data.rs
new file mode 100644
index 0000000000..87b2b12762
--- /dev/null
+++ b/rust-lib/flowy-sys/src/response/data.rs
@@ -0,0 +1,12 @@
+pub enum ResponseData {
+    Bytes(Vec<u8>),
+    None,
+}
+
+impl std::convert::Into<ResponseData> for String {
+    fn into(self) -> ResponseData { ResponseData::Bytes(self.into_bytes()) }
+}
+
+impl std::convert::Into<ResponseData> for &str {
+    fn into(self) -> ResponseData { self.to_string().into() }
+}
diff --git a/rust-lib/flowy-sys/src/response/mod.rs b/rust-lib/flowy-sys/src/response/mod.rs
index c0992fea73..b3f464fbb4 100644
--- a/rust-lib/flowy-sys/src/response/mod.rs
+++ b/rust-lib/flowy-sys/src/response/mod.rs
@@ -1,7 +1,8 @@
-mod builder;
-mod responder;
-mod response;
-
 pub use builder::*;
 pub use responder::*;
 pub use response::*;
+
+mod builder;
+pub mod data;
+mod responder;
+mod response;
diff --git a/rust-lib/flowy-sys/src/response/response.rs b/rust-lib/flowy-sys/src/response/response.rs
index a9fd41901e..14bc6e1e66 100644
--- a/rust-lib/flowy-sys/src/response/response.rs
+++ b/rust-lib/flowy-sys/src/response/response.rs
@@ -1,9 +1,8 @@
 use crate::{
-    error::Error,
+    error::SystemError,
     request::FlowyRequest,
-    response::{FlowyResponseBuilder, Responder},
+    response::{data::ResponseData, Responder},
 };
-use std::future::Future;
 
 #[derive(Clone, Copy)]
 pub enum StatusCode {
@@ -11,15 +10,10 @@ pub enum StatusCode {
     Error,
 }
 
-pub enum ResponseData {
-    Bytes(Vec<u8>),
-    None,
-}
-
 pub struct FlowyResponse<T = ResponseData> {
     pub data: T,
     pub status: StatusCode,
-    pub error: Option<Error>,
+    pub error: Option<SystemError>,
 }
 
 impl FlowyResponse {
@@ -30,32 +24,9 @@ impl FlowyResponse {
             error: None,
         }
     }
-
-    pub fn success() -> Self {
-        FlowyResponse {
-            data: ResponseData::None,
-            status: StatusCode::Success,
-            error: None,
-        }
-    }
-
-    #[inline]
-    pub fn from_error(error: Error) -> FlowyResponse {
-        let mut resp = error.as_handler_error().as_response();
-        resp.error = Some(error);
-        resp
-    }
 }
 
 impl Responder for FlowyResponse {
     #[inline]
     fn respond_to(self, _: &FlowyRequest) -> FlowyResponse { self }
 }
-
-impl std::convert::Into<ResponseData> for String {
-    fn into(self) -> ResponseData { ResponseData::Bytes(self.into_bytes()) }
-}
-
-impl std::convert::Into<ResponseData> for &str {
-    fn into(self) -> ResponseData { self.to_string().into() }
-}
diff --git a/rust-lib/flowy-sys/src/handler/boxed.rs b/rust-lib/flowy-sys/src/service/boxed.rs
similarity index 70%
rename from rust-lib/flowy-sys/src/handler/boxed.rs
rename to rust-lib/flowy-sys/src/service/boxed.rs
index cfe06f562d..9aa27d8e1c 100644
--- a/rust-lib/flowy-sys/src/handler/boxed.rs
+++ b/rust-lib/flowy-sys/src/service/boxed.rs
@@ -1,24 +1,11 @@
 use crate::{
-    error::Error,
-    payload::Payload,
-    request::FlowyRequest,
-    response::{FlowyResponse, Responder},
     service::{Service, ServiceFactory, ServiceRequest, ServiceResponse},
     util::ready::*,
 };
-use futures_core::ready;
-use paste::paste;
-use pin_project::pin_project;
-use std::{
-    future::Future,
-    marker::PhantomData,
-    pin::Pin,
-    task::{Context, Poll},
-};
 
 use futures_core::future::LocalBoxFuture;
 
-pub fn factory<SF, Req>(factory: SF) -> BoxServiceFactory<SF::Config, Req, SF::Response, SF::Error, SF::InitError>
+pub fn factory<SF, Req>(factory: SF) -> BoxServiceFactory<SF::Config, Req, SF::Response, SF::Error>
 where
     SF: ServiceFactory<Req> + 'static,
     Req: 'static,
@@ -26,38 +13,34 @@ where
     SF::Service: 'static,
     SF::Future: 'static,
     SF::Error: 'static,
-    SF::InitError: 'static,
 {
     BoxServiceFactory(Box::new(FactoryWrapper(factory)))
 }
 
-pub struct BoxServiceFactory<Cfg, Req, Res, Err, InitErr>(Inner<Cfg, Req, Res, Err, InitErr>);
-impl<C, Req, Res, Err, InitErr> ServiceFactory<Req> for BoxServiceFactory<C, Req, Res, Err, InitErr>
+pub struct BoxServiceFactory<Cfg, Req, Res, Err>(Inner<Cfg, Req, Res, Err>);
+impl<Cfg, Req, Res, Err> ServiceFactory<Req> for BoxServiceFactory<Cfg, Req, Res, Err>
 where
     Req: 'static,
     Res: 'static,
     Err: 'static,
-    InitErr: 'static,
 {
     type Response = Res;
     type Error = Err;
     type Service = BoxService<Req, Res, Err>;
-    type InitError = InitErr;
-    type Config = C;
-    type Future = LocalBoxFuture<'static, Result<Self::Service, InitErr>>;
+    type Config = Cfg;
+    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::Error>>;
 
-    fn new_service(&self, cfg: C) -> Self::Future { self.0.new_service(cfg) }
+    fn new_service(&self, cfg: Cfg) -> Self::Future { self.0.new_service(cfg) }
 }
 
-type Inner<C, Req, Res, Err, InitErr> = Box<
+type Inner<Cfg, Req, Res, Err> = Box<
     dyn ServiceFactory<
         Req,
-        Config = C,
+        Config = Cfg,
         Response = Res,
         Error = Err,
-        InitError = InitErr,
         Service = BoxService<Req, Res, Err>,
-        Future = LocalBoxFuture<'static, Result<BoxService<Req, Res, Err>, InitErr>>,
+        Future = LocalBoxFuture<'static, Result<BoxService<Req, Res, Err>, Err>>,
     >,
 >;
 
@@ -106,13 +89,12 @@ where
 
 struct FactoryWrapper<SF>(SF);
 
-impl<SF, Req, Cfg, Res, Err, InitErr> ServiceFactory<Req> for FactoryWrapper<SF>
+impl<SF, Req, Cfg, Res, Err> ServiceFactory<Req> for FactoryWrapper<SF>
 where
     Req: 'static,
     Res: 'static,
     Err: 'static,
-    InitErr: 'static,
-    SF: ServiceFactory<Req, Config = Cfg, Response = Res, Error = Err, InitError = InitErr>,
+    SF: ServiceFactory<Req, Config = Cfg, Response = Res, Error = Err>,
     SF::Future: 'static,
     SF::Service: 'static,
     <SF::Service as Service<Req>>::Future: 'static,
@@ -120,12 +102,11 @@ where
     type Response = Res;
     type Error = Err;
     type Service = BoxService<Req, Res, Err>;
-    type InitError = InitErr;
     type Config = Cfg;
-    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::InitError>>;
+    type Future = LocalBoxFuture<'static, Result<Self::Service, Self::Error>>;
 
     fn new_service(&self, cfg: Cfg) -> Self::Future {
         let f = self.0.new_service(cfg);
-        Box::pin(async { f.await.map(|s| Box::new(ServiceWrapper::new(s)) as _) })
+        Box::pin(async { f.await.map(|s| Box::new(ServiceWrapper::new(s)) as Self::Service) })
     }
 }
diff --git a/rust-lib/flowy-sys/src/handler/handler.rs b/rust-lib/flowy-sys/src/service/handler.rs
similarity index 85%
rename from rust-lib/flowy-sys/src/handler/handler.rs
rename to rust-lib/flowy-sys/src/service/handler.rs
index f945756e54..a695402677 100644
--- a/rust-lib/flowy-sys/src/handler/handler.rs
+++ b/rust-lib/flowy-sys/src/service/handler.rs
@@ -1,16 +1,20 @@
-use crate::error::Error;
-use crate::payload::Payload;
-use crate::request::{FlowyRequest, FromRequest};
-use crate::response::{FlowyResponse, Responder};
-use crate::service::{Service, ServiceFactory, ServiceRequest, ServiceResponse};
-use crate::util::ready::*;
+use std::{
+    future::Future,
+    marker::PhantomData,
+    pin::Pin,
+    task::{Context, Poll},
+};
+
 use futures_core::ready;
-use paste::paste;
 use pin_project::pin_project;
-use std::future::Future;
-use std::marker::PhantomData;
-use std::pin::Pin;
-use std::task::{Context, Poll};
+
+use crate::{
+    error::SystemError,
+    request::{payload::Payload, FlowyRequest, FromRequest},
+    response::{FlowyResponse, Responder},
+    service::{Service, ServiceFactory, ServiceRequest, ServiceResponse},
+    util::ready::*,
+};
 
 pub trait Handler<T, R>: Clone + 'static
 where
@@ -69,15 +73,12 @@ where
     R::Output: Responder,
 {
     type Response = ServiceResponse;
-    type Error = Error;
+    type Error = SystemError;
     type Service = Self;
-    type InitError = ();
     type Config = ();
-    type Future = Ready<Result<Self::Service, ()>>;
+    type Future = Ready<Result<Self::Service, Self::Error>>;
 
-    fn new_service(&self, _: ()) -> Self::Future {
-        ready(Ok(self.clone()))
-    }
+    fn new_service(&self, _: ()) -> Self::Future { ready(Ok(self.clone())) }
 }
 
 impl<H, T, R> Service<ServiceRequest> for HandlerService<H, T, R>
@@ -88,7 +89,7 @@ where
     R::Output: Responder,
 {
     type Response = ServiceResponse;
-    type Error = Error;
+    type Error = SystemError;
     type Future = HandlerServiceFuture<H, T, R>;
 
     fn call(&self, req: ServiceRequest) -> Self::Future {
@@ -117,9 +118,7 @@ where
     R: Future,
     R::Output: Responder,
 {
-    // Error type in this future is a placeholder type.
-    // all instances of error must be converted to ServiceResponse and return in Ok.
-    type Output = Result<ServiceResponse, Error>;
+    type Output = Result<ServiceResponse, SystemError>;
 
     fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
         loop {
@@ -130,20 +129,21 @@ where
                             let fut = handle.call(item);
                             let state = HandlerServiceFuture::Handle(fut, req.take());
                             self.as_mut().set(state);
-                        }
+                        },
                         Err(err) => {
                             let req = req.take().unwrap();
-                            let res = FlowyResponse::from_error(err.into());
+                            let system_err: SystemError = err.into();
+                            let res: FlowyResponse = system_err.into();
                             return Poll::Ready(Ok(ServiceResponse::new(req, res)));
-                        }
+                        },
                     };
-                }
+                },
                 HandlerServiceProj::Handle(fut, req) => {
                     let res = ready!(fut.poll(cx));
                     let req = req.take().unwrap();
                     let res = res.respond_to(&req);
                     return Poll::Ready(Ok(ServiceResponse::new(req, res)));
-                }
+                },
             }
         }
     }
@@ -175,7 +175,7 @@ macro_rules! tuple_from_req ({$tuple_type:ident, $(($n:tt, $T:ident)),+} => {
         #[allow(unused_parens)]
         impl<$($T: FromRequest + 'static),+> FromRequest for ($($T,)+)
         {
-            type Error = Error;
+            type Error = SystemError;
             type Future = $tuple_type<$($T),+>;
 
             fn from_request(req: &FlowyRequest, payload: &mut Payload) -> Self::Future {
@@ -196,7 +196,7 @@ macro_rules! tuple_from_req ({$tuple_type:ident, $(($n:tt, $T:ident)),+} => {
 
         impl<$($T: FromRequest),+> Future for $tuple_type<$($T),+>
         {
-            type Output = Result<($($T,)+), Error>;
+            type Output = Result<($($T,)+), SystemError>;
 
             fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
                 let mut this = self.project();
@@ -233,11 +233,10 @@ factory_tuple! { A B C D E }
 #[rustfmt::skip]
 mod m {
     use super::*;
+
     tuple_from_req!(TupleFromRequest1, (0, A));
     tuple_from_req!(TupleFromRequest2, (0, A), (1, B));
     tuple_from_req!(TupleFromRequest3, (0, A), (1, B), (2, C));
     tuple_from_req!(TupleFromRequest4, (0, A), (1, B), (2, C), (3, D));
     tuple_from_req!(TupleFromRequest5, (0, A), (1, B), (2, C), (3, D), (4, E));
 }
-
-
diff --git a/rust-lib/flowy-sys/src/handler/mod.rs b/rust-lib/flowy-sys/src/service/mod.rs
similarity index 64%
rename from rust-lib/flowy-sys/src/handler/mod.rs
rename to rust-lib/flowy-sys/src/service/mod.rs
index 7962f5ec2e..0dbc217430 100644
--- a/rust-lib/flowy-sys/src/handler/mod.rs
+++ b/rust-lib/flowy-sys/src/service/mod.rs
@@ -1,7 +1,7 @@
 mod boxed;
-mod dispatch;
 mod handler;
+mod service;
 
 pub use boxed::*;
-pub use dispatch::*;
 pub use handler::*;
+pub use service::*;
diff --git a/rust-lib/flowy-sys/src/service.rs b/rust-lib/flowy-sys/src/service/service.rs
similarity index 51%
rename from rust-lib/flowy-sys/src/service.rs
rename to rust-lib/flowy-sys/src/service/service.rs
index fba1440353..f66e5ac50b 100644
--- a/rust-lib/flowy-sys/src/service.rs
+++ b/rust-lib/flowy-sys/src/service/service.rs
@@ -1,8 +1,10 @@
-use crate::payload::Payload;
-use crate::request::FlowyRequest;
-use crate::response::{FlowyResponse, Responder, ResponseData};
 use std::future::Future;
 
+use crate::{
+    request::{payload::Payload, FlowyRequest},
+    response::{data::ResponseData, FlowyResponse},
+};
+
 pub trait Service<Request> {
     type Response;
     type Error;
@@ -11,13 +13,12 @@ pub trait Service<Request> {
     fn call(&self, req: Request) -> Self::Future;
 }
 
-pub trait ServiceFactory<Req> {
+pub trait ServiceFactory<Request> {
     type Response;
     type Error;
-    type Service: Service<Req, Response = Self::Response, Error = Self::Error>;
-    type InitError;
+    type Service: Service<Request, Response = Self::Response, Error = Self::Error>;
     type Config;
-    type Future: Future<Output = Result<Self::Service, Self::InitError>>;
+    type Future: Future<Output = Result<Self::Service, Self::Error>>;
 
     fn new_service(&self, cfg: Self::Config) -> Self::Future;
 }
@@ -28,17 +29,10 @@ pub struct ServiceRequest {
 }
 
 impl ServiceRequest {
-
-    pub fn new(req: FlowyRequest, payload: Payload) -> Self {
-        Self {
-            req, payload,
-        }
-    }
+    pub fn new(req: FlowyRequest, payload: Payload) -> Self { Self { req, payload } }
 
     #[inline]
-    pub fn into_parts(self) -> (FlowyRequest, Payload) {
-        (self.req, self.payload)
-    }
+    pub fn into_parts(self) -> (FlowyRequest, Payload) { (self.req, self.payload) }
 }
 
 pub struct ServiceResponse<T = ResponseData> {
@@ -47,7 +41,5 @@ pub struct ServiceResponse<T = ResponseData> {
 }
 
 impl<T> ServiceResponse<T> {
-    pub fn new(request: FlowyRequest, response: FlowyResponse<T>) -> Self {
-        ServiceResponse { request, response }
-    }
+    pub fn new(request: FlowyRequest, response: FlowyResponse<T>) -> Self { ServiceResponse { request, response } }
 }