revert upgrate to 2021 edition

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "messagebus"
-version = "0.9.6"
+version = "0.9.7"
 authors = ["Andrey Tkachenko <andrey@aidev.ru>"]
 repository = "https://github.com/andreytkachenko/messagebus.git"
 keywords = ["futures", "async", "tokio", "message", "bus"]
@@ -8,7 +8,7 @@ categories = ["network-programming", "asynchronous"]
 description = "MessageBus allows intercommunicate with messages between modules"
 license = "MIT OR Apache-2.0"
 exclude = [".gitignore", ".cargo/config", ".github/**", "codecov.yml"]
-edition = "2021"
+edition = "2018"
 
 [workspace]
 members = [

crates/derive/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "messagebus_derive"
-version = "0.2.1"
+version = "0.2.2"
 authors = ["Andrey Tkachenko <andrey@aidev.ru>"]
 repository = "https://github.com/andreytkachenko/messagebus.git"
 keywords = ["futures", "async", "tokio", "message", "bus"]
@@ -8,7 +8,7 @@ categories = ["network-programming", "asynchronous"]
 description = "MessageBus allows intercommunicate with messages between modules"
 license = "MIT OR Apache-2.0"
 exclude = [".gitignore", ".cargo/config", ".github/**", "codecov.yml"]
-edition = "2021"
+edition = "2018"
 
 [lib]
 proc-macro = true

crates/remote/Cargo.toml

@@ -8,7 +8,7 @@ categories = ["network-programming", "asynchronous"]
 description = "MessageBus remote allows intercommunicate by messages between instances"
 license = "MIT OR Apache-2.0"
 exclude = [".gitignore", ".cargo/config", ".github/**", "codecov.yml"]
-edition = "2021"
+edition = "2018"
 
 # [features]
 # quic = ["quinn"]
@@ -16,7 +16,7 @@ edition = "2021"
 [dependencies]
 thiserror = "1.0"
 messagebus = { path="../../" }
-tokio = { version = "1", features = ["parking_lot", "rt-multi-thread", "sync", "time"] }
+tokio = { version = "1", features = ["parking_lot", "rt-multi-thread", "sync", "time", "io-util"] }
 parking_lot = "0.11"
 quinn = "0.7"
 rmp = "0.8.10"
@@ -28,8 +28,16 @@ futures = "0.3.17"
 cbor = "0.4.1"
 serde_cbor = "0.11.2"
 bytes = "1.1.0"
+quinn-proto = "0.7.3"
+rustls = "0.19.1"
+redis = "0.21.2"
+bitflags = "1.3.2"
+serde_json = "1.0.68"
 
 [dev-dependencies]
+anyhow = "1.0.44"
+async-trait = "0.1.51"
+thiserror = "1.0.29"
 tokio = { version = "1.11.0", features = ["full"] }
 # quinn = { version = "0.7", optional = true }
 

crates/remote/examples/basic.rs

@@ -1,2 +0,0 @@
-#[tokio::main]
-async fn main() {}

crates/remote/examples/quic_client.rs

@@ -0,0 +1,58 @@
+use messagebus::Bus;
+use messagebus_remote::relays::QuicClientRelay;
+use serde_derive::{Serialize, Deserialize};
+use messagebus::{Message, derive::Message};
+
+
+#[derive(Serialize, Deserialize, Debug, Clone, Message)]
+#[namespace("example")]
+#[message(shared, clone)]
+pub struct Req {
+    data: i32,
+    text: String
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, Message)]
+#[namespace("example")]
+#[message(shared, clone)]
+pub struct Resp {
+    data: i32,
+    text: String
+}
+
+
+
+#[tokio::main]
+async fn main() {
+    let relay = QuicClientRelay::new(
+        "./examples/cert.der", 
+        "127.0.0.1:8083".parse().unwrap(), 
+        "localhost".into(),
+        vec![
+            ("example::Req".into(), "example::Resp".into(), "GenericError".into())
+        ]
+    ).unwrap();
+
+    let (b, poller) = Bus::build()
+        .register_shared_message::<Req>()
+        .register_shared_message::<Resp>()
+        .register_relay(relay)
+        .build();
+
+    
+    b.ready().await;
+    println!("ready");
+
+    let resp: Resp = b.request(Req {
+        data: 12,
+        text: String::from("test")
+    }, Default::default())
+    .await
+    .unwrap();
+
+    println!("resp {:?}", resp);
+
+    b.flush().await;
+    b.close().await;
+    poller.await;
+}

crates/remote/examples/quic_server.rs

@@ -0,0 +1,85 @@
+use messagebus::{error, Message, derive::{Message, Error as MbError}, AsyncHandler, Bus};
+use messagebus_remote::relays::{QuicServerRelay};
+use serde_derive::{Serialize, Deserialize};
+use async_trait::async_trait;
+use thiserror::Error;
+
+
+#[derive(Debug, Error, MbError)]
+enum Error {
+    #[error("Error({0})")]
+    Error(anyhow::Error),
+}
+
+impl<M: Message> From<error::Error<M>> for Error {
+    fn from(err: error::Error<M>) -> Self {
+        Self::Error(err.into())
+    }
+}
+
+
+#[derive(Serialize, Deserialize, Debug, Clone, Message)]
+#[namespace("example")]
+#[message(shared, clone)]
+pub struct Req {
+    data: i32,
+    text: String
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, Message)]
+#[namespace("example")]
+#[message(shared, clone)]
+pub struct Resp {
+    data: i32,
+    text: String
+}
+
+
+struct TmpReceiver;
+
+#[async_trait]
+impl AsyncHandler<Req> for TmpReceiver {
+    type Error = Error;
+    type Response = Resp;
+
+    async fn handle(&self, msg: Req, _bus: &Bus) -> Result<Self::Response, Self::Error> {
+        println!("TmpReceiver::handle {:?}", msg);
+        Ok(Resp {
+            data: msg.data + 12,
+            text: format!("<< {} >>", msg.text),
+        })
+    }
+
+    async fn sync(&self, _bus: &Bus) -> Result<(), Self::Error> {
+        println!("TmpReceiver::sync");
+        Ok(())
+    }
+}
+
+
+#[tokio::main]
+async fn main() {
+    let relay = QuicServerRelay::new(
+        "./examples/cert.key",
+        "./examples/cert.der", 
+        "0.0.0.0:8083".parse().unwrap(), 
+        vec![
+            ("example::Req".into(), "example::Resp".into(), "GenericError".into())
+        ]
+    ).unwrap();
+
+    let (b, poller) = Bus::build()
+        .register_shared_message::<Req>()
+        .register_shared_message::<Resp>()
+        .register_relay(relay)
+        .register(TmpReceiver)
+            .subscribe_async::<Req>(8, Default::default())
+        .done()
+        .build();
+    
+    b.ready().await;
+
+    println!("ready");
+
+    poller.await;
+}

crates/remote/src/error.rs

@@ -24,4 +24,22 @@ pub enum Error {
 
     #[error("QuinnConnectError: {0}")]
     QuinnParseError(#[from] ParseError),
+
+    #[error("ConfigError: {0}")]
+    ConfigError(#[from] quinn_proto::ConfigError),
+
+    #[error("TLSError: {0}")]
+    TLSError(#[from] rustls::TLSError),
+
+    #[error("Redis: {0}")]
+    Redis(#[from] redis::RedisError),
+
+    #[error("ProtocolParseError")]
+    ProtocolParseError,
+    
+    #[error("UnknownCodec")]
+    UnknownCodec,
+
+    #[error("SerdeErased {0}")]
+    SerdeErased(#[from] erased_serde::Error),
 }

crates/remote/src/lib.rs

@@ -1,2 +1,3 @@
 pub mod error;
+pub mod proto;
 pub mod relays;

crates/remote/src/proto.rs

@@ -0,0 +1,510 @@
+use messagebus::{Action, Bus, Event, SharedMessage, TypeTag};
+use serde_derive::{Deserialize, Serialize};
+use std::borrow::Cow;
+
+#[derive(Debug, Deserialize, Serialize)]
+#[repr(u16)]
+pub enum ProtocolHeaderActionKind {
+    Nop,
+    Error,
+
+    Send,
+    Response,
+    BatchComplete,
+
+    Flush,
+    Flushed,
+
+    Synchronize,
+    Synchronized,
+
+    Close,
+    Exited,
+
+    Initialize,
+    Ready,
+
+    Pause,
+}
+
+#[derive(Debug, Copy, Clone, Deserialize, Serialize)]
+#[non_exhaustive]
+#[repr(u32)]
+pub enum BodyType {
+    None,
+    Utf8,
+    Cbor,
+    MessagePack,
+    Json,
+    Bson,
+}
+
+bitflags::bitflags! {
+    #[derive(Deserialize, Serialize)]
+    pub struct ProtocolHeaderFlags: u32 {
+        const TYPE_TAG = 0b00000001;
+        const BODY     = 0b00000010;
+        const ERROR    = 0b00000100;
+        const ARGUMENT = 0b00001000;
+        const TT_AND_ERROR = Self::TYPE_TAG.bits | Self::ERROR.bits;
+        const TT_AND_BODY =  Self::TYPE_TAG.bits | Self::BODY.bits;
+        const TT_ERROR_AND_ARGUMENT = Self::TYPE_TAG.bits | Self::ERROR.bits | Self::ARGUMENT.bits;
+        const TT_BODY_AND_ARGUMENT =  Self::TYPE_TAG.bits | Self::BODY.bits | Self::ARGUMENT.bits;
+    }
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct ProtocolHeader<'a> {
+    pub kind: ProtocolHeaderActionKind,
+    pub type_tag: Option<Cow<'a, [u8]>>,
+    pub flags: ProtocolHeaderFlags,
+    pub body_type: BodyType,
+    pub argument: u64,
+}
+
+impl<'a> ProtocolHeader<'a> {
+    pub fn send(mid: u64, tt: &'a TypeTag, body_type: BodyType) -> ProtocolHeader<'a> {
+        ProtocolHeader {
+            kind: ProtocolHeaderActionKind::Send,
+            type_tag: Some(tt.as_bytes().into()),
+            flags: ProtocolHeaderFlags::TT_BODY_AND_ARGUMENT,
+            body_type,
+            argument: mid,
+        }
+    }
+
+    pub fn flush() -> Self {
+        ProtocolHeader {
+            kind: ProtocolHeaderActionKind::Flush,
+            type_tag: None,
+            flags: ProtocolHeaderFlags::empty(),
+            body_type: BodyType::None,
+            argument: 0,
+        }
+    }
+
+    pub fn close() -> Self {
+        ProtocolHeader {
+            kind: ProtocolHeaderActionKind::Close,
+            type_tag: None,
+            flags: ProtocolHeaderFlags::empty(),
+            body_type: BodyType::None,
+            argument: 0,
+        }
+    }
+
+    pub fn sync() -> Self {
+        ProtocolHeader {
+            kind: ProtocolHeaderActionKind::Synchronize,
+            type_tag: None,
+            flags: ProtocolHeaderFlags::empty(),
+            body_type: BodyType::None,
+            argument: 0,
+        }
+    }
+
+    // pub fn init() -> Self {
+    //     ProtocolHeader {
+    //         kind: ProtocolHeaderActionKind::Initialize,
+    //         type_tag: None,
+    //         failed: false,
+    //         body_encoding: 0,
+    //         argument: 0,
+    //     }
+    // }
+
+    // pub fn pause() -> Self {
+    //     ProtocolHeader {
+    //         kind: ProtocolHeaderActionKind::Pause,
+    //         type_tag: None,
+    //         failed: false,
+    //         body_encoding: 0,
+    //         argument: 0,
+    //     }
+    // }
+}
+
+#[derive(Debug)]
+pub enum ProtocolItem {
+    Nop,
+    Event(Event<Box<dyn SharedMessage>, messagebus::error::GenericError>),
+    Action(Action),
+    Send(u64, Box<dyn SharedMessage>, bool)
+}
+
+impl From<Action> for ProtocolItem {
+    fn from(action: Action) -> Self {
+        ProtocolItem::Action(action)
+    }
+}
+
+impl From<Event<Box<dyn SharedMessage>, messagebus::error::GenericError>> for ProtocolItem {
+    fn from(ev: Event<Box<dyn SharedMessage>, messagebus::error::GenericError>) -> Self {
+        ProtocolItem::Event(ev)
+    }
+}
+
+impl From<(u64, Box<dyn SharedMessage>, bool)> for ProtocolItem {
+    fn from(msg: (u64, Box<dyn SharedMessage>, bool)) -> Self {
+        ProtocolItem::Send(msg.0, msg.1, msg.2)
+    }
+}
+
+impl ProtocolItem {
+    pub fn unwrap_send(self) -> Result<(u64, Box<dyn SharedMessage>, bool), ProtocolItem> {
+        match self {
+            ProtocolItem::Send(a, b, c) => Ok((a, b, c)),
+            other => Err(other)
+        }
+    }
+
+    pub fn serialize(self, mut body_type: BodyType, body_buff: &mut Vec<u8>) -> Result<ProtocolPacket<'_>, crate::error::Error> {
+        let mut argument = 0;
+        let mut type_tag = None;
+        let mut body = None;
+        let mut flags = ProtocolHeaderFlags::empty();
+        
+        let kind = match self {
+            ProtocolItem::Nop => ProtocolHeaderActionKind::Nop,
+            ProtocolItem::Action(action) => match action {
+                Action::Close => ProtocolHeaderActionKind::Close,
+                Action::Flush => ProtocolHeaderActionKind::Flush,
+                Action::Init => ProtocolHeaderActionKind::Initialize,
+                Action::Sync => ProtocolHeaderActionKind::Synchronize,
+                _ => unimplemented!(),
+            }
+            ProtocolItem::Send(mid, msg, req) => {
+                let msg = msg.as_shared_boxed()
+                    .map_err(|_| crate::error::Error::UnknownCodec)?;
+
+                argument = mid;
+                flags.set(ProtocolHeaderFlags::ARGUMENT, req);
+                flags.set(ProtocolHeaderFlags::BODY, true);
+                flags.set(ProtocolHeaderFlags::TYPE_TAG, true);
+                type_tag = Some(msg.type_tag());
+                body = Some(generic_serialize(body_type, &*msg, body_buff)?);
+
+                ProtocolHeaderActionKind::Send
+            },
+            ProtocolItem::Event(ev) => match ev {
+                Event::Response(mid, res) => {
+                    argument = mid;
+                    flags.set(ProtocolHeaderFlags::ARGUMENT, true);
+                    flags.set(ProtocolHeaderFlags::BODY, true);
+                    flags.set(ProtocolHeaderFlags::TYPE_TAG, true);
+
+                    match res {
+                        Ok(msg) => {
+                            let msg = msg.as_shared_boxed()
+                                .map_err(|_| crate::error::Error::UnknownCodec)?;
+    
+                            type_tag = Some(msg.type_tag());
+                            body = Some(generic_serialize(body_type, &*msg, body_buff)?);
+                        }
+
+                        Err(err) => {
+                            flags.set(ProtocolHeaderFlags::ERROR, true);
+                            
+                            type_tag = Some("GenericError".into());
+                            body_type = BodyType::Utf8;
+                            body = Some(format!("{}", err).into_bytes().into());
+                        }
+                    }
+
+                    ProtocolHeaderActionKind::Response
+                },
+                Event::Error(err) => {
+                    flags.set(ProtocolHeaderFlags::ERROR, true);
+                    flags.set(ProtocolHeaderFlags::BODY, true);
+                    flags.set(ProtocolHeaderFlags::TYPE_TAG, true);
+
+                    type_tag = Some("GenericError".into());
+                    body_type = BodyType::Utf8;
+                    body = Some(format!("{}", err).into_bytes().into());
+
+                    ProtocolHeaderActionKind::Error
+                }
+                Event::Finished(n) => {
+                    argument = n;
+                    flags.set(ProtocolHeaderFlags::ARGUMENT, true);
+                    ProtocolHeaderActionKind::BatchComplete
+                },
+                Event::Synchronized(res) => {
+                    match res {
+                        Ok(_) => {}
+                        Err(err) => {
+                            flags.set(ProtocolHeaderFlags::BODY, true);
+                            flags.set(ProtocolHeaderFlags::ERROR, true);
+                            flags.set(ProtocolHeaderFlags::TYPE_TAG, true);
+                            
+                            type_tag = Some("GenericError".into());
+                            body_type = BodyType::Utf8;
+                            body = Some(format!("{}", err).into_bytes().into());
+                        }
+                    }
+                    ProtocolHeaderActionKind::Synchronized 
+                }
+                Event::InitFailed(err) => {
+                    flags.set(ProtocolHeaderFlags::BODY, true);
+                    flags.set(ProtocolHeaderFlags::ERROR, true);
+                    flags.set(ProtocolHeaderFlags::TYPE_TAG, true);
+                    
+                    type_tag = Some("GenericError".into());
+                    body_type = BodyType::Utf8;
+                    body = Some(format!("{}", err).into_bytes().into());
+
+                    ProtocolHeaderActionKind::Ready
+                },
+                Event::Ready => ProtocolHeaderActionKind::Ready,
+                Event::Pause => ProtocolHeaderActionKind::Pause,
+                Event::Exited => ProtocolHeaderActionKind::Exited,
+                Event::Flushed => ProtocolHeaderActionKind::Flushed,
+                _ => unimplemented!()
+            }
+        };
+
+        Ok(ProtocolPacket {
+            header: ProtocolHeader {
+                kind,
+                type_tag: type_tag.map(|x| x.to_string().into_bytes().into()),
+                flags,
+                body_type,
+                argument,
+            },
+            body
+        })
+    }
+}
+
+
+#[derive(Debug, Deserialize, Serialize)]
+pub struct ProtocolPacket<'a> {
+    pub header: ProtocolHeader<'a>,
+    pub body: Option<Cow<'a, [u8]>>,
+}
+
+impl<'a> ProtocolPacket<'a> {
+    pub fn deserialize(
+        self,
+        bus: &Bus,
+    ) -> Result<ProtocolItem, crate::error::Error>
+    {
+        let type_tag: Option<TypeTag> = if self.header.flags.contains(ProtocolHeaderFlags::TYPE_TAG) {
+            self.header
+                .type_tag
+                .map(|x| String::from_utf8_lossy(x.as_ref()).to_string().into())
+        } else {
+            None
+        };
+
+        let (body, error) = if self.header.flags.contains(ProtocolHeaderFlags::ERROR) {
+            let error = messagebus::error::GenericError {
+                type_tag: type_tag.unwrap(),
+                description: self.body.map(|x|String::from_utf8_lossy(x.as_ref()).to_string()).unwrap_or_default(),
+            };
+
+            (None, Some(messagebus::error::Error::Other(error)))
+        } else if self.header.flags.contains(ProtocolHeaderFlags::TT_AND_BODY) {
+            let body = self.body.ok_or(crate::error::Error::ProtocolParseError)?;
+            let res = generic_deserialize(self.header.body_type, body.as_ref(), |de| {
+                bus.deserialize_message(type_tag.unwrap(), de)
+                    .map_err(|x| x.map_msg(|_| ()))
+            })?;
+
+            match res {
+                Ok(body) => (Some(body), None),
+                Err(err) => (None, Some(err)),
+            }
+        } else {
+            (None, None)
+        };
+
+        let argument = if self.header.flags.contains(ProtocolHeaderFlags::ARGUMENT) {
+            Some(self.header.argument)
+        } else {
+            None
+        };
+
+        Ok(ProtocolItem::Event(match self.header.kind {
+            ProtocolHeaderActionKind::Response => Event::Response(
+                argument
+                    .ok_or(crate::error::Error::ProtocolParseError)?,
+                error
+                    .map(Err)
+                    .or_else(|| body.map(Ok))
+                    .ok_or(crate::error::Error::ProtocolParseError)?,
+            ),
+            ProtocolHeaderActionKind::Synchronized => {
+                Event::Synchronized(error.map(Err).unwrap_or(Ok(())))
+            }
+            ProtocolHeaderActionKind::Error => {
+                Event::Error(error.ok_or(crate::error::Error::ProtocolParseError)?)
+            }
+            ProtocolHeaderActionKind::BatchComplete => Event::Finished(self.header.argument),
+            ProtocolHeaderActionKind::Flushed => Event::Flushed,
+            ProtocolHeaderActionKind::Exited => Event::Exited,
+            ProtocolHeaderActionKind::Ready => Event::Ready,
+            ProtocolHeaderActionKind::Pause => Event::Pause,
+
+            other => return Ok(ProtocolItem::Action(match other {
+                ProtocolHeaderActionKind::Initialize => Action::Init,
+                ProtocolHeaderActionKind::Close => Action::Close,
+                ProtocolHeaderActionKind::Flush => Action::Flush,
+                ProtocolHeaderActionKind::Synchronize => Action::Sync,
+                ProtocolHeaderActionKind::Send => {
+                    let req = argument.is_some();
+                    let mid = self.header.argument;
+                    let body = body.ok_or(crate::error::Error::ProtocolParseError)?;
+
+                    return Ok(ProtocolItem::Send(mid, body, req));
+                },
+                ProtocolHeaderActionKind::Nop => return Ok(ProtocolItem::Nop),
+
+                _ => unreachable!()
+            })),
+        }))
+    }
+}
+
+fn generic_deserialize<F, T>(k: BodyType, data: &[u8], f: F) -> Result<T, crate::error::Error>
+where
+    F: FnOnce(&mut dyn erased_serde::Deserializer<'_>) -> T,
+{
+    match k {
+        BodyType::Cbor => {
+            let mut cbor_de = serde_cbor::Deserializer::from_slice(data);
+            let mut de = <dyn erased_serde::Deserializer>::erase(&mut cbor_de);
+
+            Ok(f(&mut de))
+        }
+
+        BodyType::Json => {
+            let mut json_de = serde_json::Deserializer::from_slice(data);
+            let mut de = <dyn erased_serde::Deserializer>::erase(&mut json_de);
+
+            Ok(f(&mut de))
+        }
+
+        _ => Err(crate::error::Error::UnknownCodec),
+    }
+}
+
+fn generic_serialize<'a>(kind: BodyType, msg: &dyn SharedMessage, buffer: &'a mut Vec<u8>) -> Result<Cow<'a, [u8]>, crate::error::Error> {
+    match kind {
+        BodyType::Cbor => {
+            let mut cbor_se = serde_cbor::Serializer::new(&mut *buffer);
+            let mut se = <dyn erased_serde::Serializer>::erase(&mut cbor_se);
+            msg.erased_serialize(&mut se)?;
+        }
+
+        BodyType::Json => {
+            let mut json_se = serde_json::Serializer::new(&mut *buffer);
+            let mut se = <dyn erased_serde::Serializer>::erase(&mut json_se);
+            msg.erased_serialize(&mut se)?;
+        }
+
+        _ => return Err(crate::error::Error::UnknownCodec),
+    }
+
+    Ok(buffer.as_slice().into())
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::proto::ProtocolItem;
+
+    use super::{
+        BodyType, ProtocolHeader, ProtocolHeaderActionKind, ProtocolHeaderFlags, ProtocolPacket,
+    };
+    use messagebus::Event;
+    use messagebus::{derive::Message, Bus, Message, TypeTagged};
+    use serde_derive::{Deserialize, Serialize};
+    use std::borrow::Cow;
+
+    #[derive(Serialize, Deserialize, Debug, Clone, Message)]
+    #[namespace("test")]
+    #[message(shared, clone)]
+    struct TestSharedMessage {
+        test: String,
+        value: i32,
+    }
+
+    #[test]
+    fn test_proto_pack_event() {
+        let (bus, _) = Bus::build()
+            .register_shared_message::<TestSharedMessage>()
+            .build();
+
+        let pkt = ProtocolPacket {
+            header: ProtocolHeader {
+                kind: ProtocolHeaderActionKind::Response,
+                type_tag: Some(TestSharedMessage::type_tag_().as_bytes().to_vec().into()),
+                flags: ProtocolHeaderFlags::TT_BODY_AND_ARGUMENT,
+                body_type: BodyType::Json,
+                argument: 222,
+            },
+            body: Some(Cow::Borrowed(br#"{"test":"my test","value":12}"#)),
+        };
+
+        let event = match pkt.deserialize(&bus).unwrap() {
+            ProtocolItem::Event(ev) => ev,
+            _ => unreachable!()
+        };
+        
+        assert!(matches!(event, Event::Response(..)));
+
+        match event {
+            Event::Response(mid, msg) => {
+                assert_eq!(mid, 222);
+                // assert!(msg.is_ok());
+                let msg = msg.unwrap();
+
+                assert_eq!(msg.type_tag(), TestSharedMessage::type_tag_());
+                let m: Box<TestSharedMessage> = msg.as_any_boxed().downcast().unwrap();
+
+                assert_eq!(m.value, 12);
+                assert_eq!(&m.test, "my test");
+            }
+            _ => unreachable!(),
+        }
+    }
+
+    #[test]
+    fn test_proto_pack_event_error() {
+        let (bus, _) = Bus::build()
+            .register_shared_message::<TestSharedMessage>()
+            .build();
+
+        let pkt = ProtocolPacket {
+            header: ProtocolHeader {
+                kind: ProtocolHeaderActionKind::Response,
+                type_tag: Some(TestSharedMessage::type_tag_().as_bytes().to_vec().into()),
+                flags: ProtocolHeaderFlags::TT_ERROR_AND_ARGUMENT,
+                body_type: BodyType::Utf8,
+                argument: 222,
+            },
+            body: Some(Cow::Borrowed(br#"error description"#)),
+        };
+
+        let event = match pkt.deserialize(&bus).unwrap() {
+            ProtocolItem::Event(ev) => ev,
+            _ => unreachable!()
+        };
+        
+        assert!(matches!(event, Event::Response(..)));
+
+        #[allow(clippy::unit_cmp)]
+        match event {
+            Event::Response(mid, msg) => {
+                assert_eq!(mid, 222);
+                let msg = msg.unwrap_err();
+                
+                assert!(matches!(msg, messagebus::error::Error::Other(val) if (
+                    assert_eq!(val.type_tag, TestSharedMessage::type_tag_()) == () &&
+                    assert_eq!(val.description, "error description") == ()
+                )));
+            }
+            _ => unreachable!(),
+        }
+    }
+}

crates/remote/src/relays/mod.rs

@@ -1,6 +1,8 @@
 // #[cfg(feature = "quic")]
 mod quic;
 
+// mod redis;
+
 use futures::Stream;
 use messagebus::{error::GenericError, Event, Message, TypeTag};
 use std::{collections::HashMap, pin::Pin};
@@ -11,21 +13,15 @@ pub use quic::*;
 pub(crate) type GenericEventStream =
     Pin<Box<dyn Stream<Item = Event<Box<dyn Message>, GenericError>> + Send>>;
 
-
 #[derive(Debug, Default)]
-pub(crate) struct MessageTable {
+pub struct MessageTable {
     table: HashMap<TypeTag, Vec<(TypeTag, TypeTag)>>,
 }
 
 impl MessageTable {
-    pub fn new() -> Self {
-        Self {
-            table: HashMap::new(),
-        }
-    }
-
     pub fn add(&mut self, req: TypeTag, resp: TypeTag, err: TypeTag) {
-        self.table.entry(req)
+        self.table
+            .entry(req)
             .or_insert_with(Vec::new)
             .push((resp, err));
     }
@@ -47,7 +43,6 @@ impl MessageTable {
     }
 }
 
-
 impl From<Vec<(TypeTag, TypeTag, TypeTag)>> for MessageTable {
     fn from(table: Vec<(TypeTag, TypeTag, TypeTag)>) -> Self {
         let mut outgoing_table = MessageTable::default();

crates/remote/src/relays/quic/client.rs

@@ -1,15 +1,9 @@
-use crate::{
-    error::Error,
-    relays::{GenericEventStream, MessageTable},
-};
-use futures::{Future, FutureExt, Stream, pin_mut};
-use messagebus::{Action, Bus, Event, Message, ReciveUntypedReceiver, SendUntypedReceiver, SharedMessage, TypeTag, TypeTagAccept, TypeTagged, error::{GenericError, SendError}};
+use crate::{error::Error, proto::{BodyType, ProtocolItem, ProtocolPacket}, relays::{GenericEventStream, MessageTable}};
+use futures::{Future, FutureExt};
+use messagebus::{Action, Bus, Event, Message, ReciveUntypedReceiver, SendUntypedReceiver, TypeTag, TypeTagAccept};
 use parking_lot::Mutex;
-use serde::Deserialize;
-use serde_derive::{Deserialize, Serialize};
-use core::slice::SlicePattern;
-use std::{collections::{HashMap, HashSet}, net::SocketAddr, pin::Pin, sync::atomic::AtomicBool, task::Poll};
-use tokio::{io::{AsyncRead, AsyncWrite, AsyncWriteExt, ReadBuf}, sync::{mpsc::{self, UnboundedSender, UnboundedReceiver}, oneshot}};
+use std::{net::SocketAddr, sync::atomic::AtomicBool};
+use tokio::{sync::{mpsc::{self, UnboundedSender, UnboundedReceiver}, oneshot}};
 use bytes::{Buf, BufMut};
 
 pub const ALPN_QUIC_HTTP: &[&[u8]] = &[b"hq-29"];
@@ -74,15 +68,14 @@ pub struct QuicClientRelay {
     host: String,
     endpoint: QuicClientRelayEndpoint,
     outgoing_table: MessageTable,
-    sender: UnboundedSender<Request>,
-    receiver_send: Mutex<Option<(oneshot::Sender<(quinn::RecvStream, quinn::Connection)>, UnboundedReceiver<Request>)>>,
+    sender: UnboundedSender<ProtocolItem>,
+    receiver_send: Mutex<Option<(oneshot::Sender<(quinn::RecvStream, quinn::Connection)>, UnboundedReceiver<ProtocolItem>)>>,
     receiver_recv: Mutex<Option<oneshot::Receiver<(quinn::RecvStream, quinn::Connection)>>>,
 }
 
 impl QuicClientRelay {
     pub fn new(cert: &str, addr: SocketAddr, host: String, table: Vec<(TypeTag, TypeTag, TypeTag)>) -> Result<Self, Error> {
         let endpoint = QuicClientRelayEndpoint::new(cert)?;
-        let mut outgoing_table = MessageTable::from(table);
         let (sender, receiver) = mpsc::unbounded_channel();
         let (recv_send, recv_recv) = oneshot::channel();
 
@@ -91,7 +84,7 @@ impl QuicClientRelay {
             addr,
             host,
             endpoint,
-            outgoing_table,
+            outgoing_table: MessageTable::from(table),
             sender,
             receiver_send: Mutex::new(Some((recv_send, receiver))),
             receiver_recv: Mutex::new(Some(recv_recv)),
@@ -99,195 +92,6 @@ impl QuicClientRelay {
     }
 }
 
-#[derive(Deserialize, Serialize)]
-#[repr(u16)]
-pub enum ProtocolHeaderActionKind {
-    Nop,
-    Send,
-    Response,
-    Flush,
-    Flushed,
-    Synchronize,
-    Synchronized,
-    BatchComplete,
-    Close,
-    Exited,
-    Initialize,
-    Ready,
-    Pause,
-    Paused,
-    Error,
-}
-
-#[derive(Deserialize, Serialize)]
-pub struct ProtocolHeader<'a> {
-    kind: ProtocolHeaderActionKind,
-    type_tag: Option<&'a [u8]>,
-    failed: bool,
-    body_encoding: u32,
-    argument: u64,
-}
-
-impl<'a> ProtocolHeader<'a> {
-    pub fn send(mid: u64, tt: &'a TypeTag) -> ProtocolHeader<'a> {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Send,
-            type_tag: Some(tt.as_bytes()),
-            failed: false,
-            body_encoding: 0,
-            argument: mid,
-        }
-    }
-
-    pub fn flush() -> Self {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Flush,
-            type_tag: None,
-            failed: false,
-            body_encoding: 0,
-            argument: 0,
-        }
-    }
-
-    pub fn close() -> Self {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Close,
-            type_tag: None,
-            failed: false,
-            body_encoding: 0,
-            argument: 0,
-        }
-    }
-
-    pub fn sync() -> Self {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Synchronize,
-            type_tag: None,
-            failed: false,
-            body_encoding: 0,
-            argument: 0,
-        }
-    }
-
-    pub fn init() -> Self {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Initialize,
-            type_tag: None,
-            failed: false,
-            body_encoding: 0,
-            argument: 0,
-        }
-    }
-
-    pub fn pause() -> Self {
-        ProtocolHeader {
-            kind: ProtocolHeaderActionKind::Pause,
-            type_tag: None,
-            failed: false,
-            body_encoding: 0,
-            argument: 0,
-        }
-    }
-}
-
-#[derive(Deserialize, Serialize)]
-pub struct ProtocolPacket<'a> {
-    header: ProtocolHeader<'a>,
-    body: &'a [u8]
-}
-
-#[derive(Debug)]
-pub enum Request {
-    Init,
-    Flush,
-    Sync,
-    Close,
-    Stats,
-    Send(u64, Box<dyn SharedMessage>, bool),
-}
-
-impl Request {
-    pub async fn serialize<W: AsyncWrite + Unpin>(&self, mut header_buff: &mut Vec<u8>, body_buff: &mut Vec<u8>, conn: &mut W) -> Result<(), Error> {
-        body_buff.clear();
-        header_buff.clear();
-
-        let mut tt = TypeTag::Borrowed("");
-        let header = match self {
-            Request::Init => unimplemented!(),
-            Request::Flush => ProtocolHeader::flush(),
-            Request::Sync => ProtocolHeader::sync(),
-            Request::Close => ProtocolHeader::close(),
-            Request::Stats => unimplemented!(),
-            Request::Send(mid, msg, req) => {
-                tt = msg.type_tag();
-                
-                let mut cbor_se = serde_cbor::Serializer::new(&mut *body_buff);
-                let mut se = <dyn erased_serde::Serializer>::erase(&mut cbor_se);
-
-                msg.erased_serialize(&mut se);
-
-                ProtocolHeader::send(if *req {*mid} else {0}, &tt)
-            }
-        };
-
-        serde_cbor::to_writer(&mut header_buff, &ProtocolPacket {
-            header,
-            body: body_buff.as_slice(),
-        }).unwrap();
-
-        let mut buf = [0u8; 16];
-        let mut writer = &mut buf[..];
-
-        writer.put(&b"MBUS"[..]);
-        writer.put_u16(1);
-        writer.put_u16(0);
-        writer.put_u64(header_buff.len() as _);
-
-        conn.write_all(&buf).await?;
-        conn.write_all(&header_buff).await?;
-
-        Ok(())
-        // buff.
-        
-       
-        // let x = match self {
-        //     Request::Init => unimplemented!(),
-        //     Request::Flush => ProtocolHeader::Flush,
-        //     Request::Sync => ProtocolHeader::Synchronize,
-        //     Request::Close => ProtocolHeader::Close,
-        //     Request::Stats => unimplemented!(),
-        //     Request::Send(_mid, msg) => {
-        //         let ser = serde_cbor::Serializer::new(buff);
-                
-        //         ProtocolHeader::Send(msg.type_tag())
-        //     }
-
-        //     Request::Request(mid, msg) => {
-        //         ProtocolHeader::Request(*mid, msg.type_tag())
-        //     }
-        // };
-    }
-}
-
-impl From<Action> for Request {
-    fn from(action: Action) -> Self {
-        match action {
-            Action::Init => Request::Init,
-            Action::Flush => Request::Flush,
-            Action::Sync => Request::Sync,
-            Action::Close => Request::Close,
-            Action::Stats => Request::Stats,
-            _ => unimplemented!(),
-        }
-    }
-}
-
-impl From<(bool, u64, Box<dyn SharedMessage>)> for Request {
-    fn from((req, mid, msg): (bool, u64, Box<dyn SharedMessage>)) -> Self {
-        Request::Send(mid, msg, req)
-    }
-}
-
 impl TypeTagAccept for QuicClientRelay {
     fn accept(&self, msg: &TypeTag, resp: Option<&TypeTag>, err: Option<&TypeTag>) -> bool {
         self.outgoing_table.accept(msg, resp, err)
@@ -312,13 +116,33 @@ impl SendUntypedReceiver for QuicClientRelay {
                 let conn = self.endpoint.connect(&self.addr, &self.host);
 
                 tokio::spawn(async move {
+                    println!("spawn");
                     let mut conn = conn.await.unwrap();
                     sender.send((conn.recv, conn.connection)).unwrap();
-                    let mut buf1 = Vec::new();
-                    let mut buf2 = Vec::new();
+                    let mut body_buff = Vec::new();
+                    let mut header_buff = Vec::new();
 
                     while let Some(r) = rx.recv().await {
-                        r.serialize(&mut buf1, &mut buf2, &mut conn.send);
+                        body_buff.clear();
+                        header_buff.clear();
+                        
+                        let pkt = r.serialize(BodyType::Cbor, &mut body_buff).unwrap();
+                        serde_cbor::to_writer(&mut header_buff, &pkt).unwrap();
+
+                        println!("msg {:?}", pkt);
+
+                        let mut buf = [0u8; 16];
+                        let mut writer = &mut buf[..];
+
+                        writer.put(&b"MBUS"[..]);
+                        writer.put_u16(1);
+                        writer.put_u16(0);
+                        writer.put_u64(header_buff.len() as _);
+
+                        conn.send.write_all(&buf).await.unwrap();
+                        println!("header sent");
+                        conn.send.write_all(&header_buff).await.unwrap();
+                        println!("body sent");
                     }
                 });
             }
@@ -336,11 +160,16 @@ impl SendUntypedReceiver for QuicClientRelay {
         req: bool,
         _bus: &Bus,
     ) -> Result<(), messagebus::error::Error<Box<dyn Message>>> {
-        if let Ok(val) = msg.as_shared_boxed() {
-            self.sender.send((req, mid, msg).into()).unwrap();
-            Ok(())
+        match msg.as_shared_boxed() {
+            Ok(msg) => {
+                if let Err(err) = self.sender.send((mid, msg, req).into()) {
+                    Err(messagebus::error::Error::TryAgain(err.0.unwrap_send().unwrap().1.upcast_box()))
                 } else {
-            Err(SendError:)
+                    Ok(())
+                }
+            }
+            
+            Err(msg) => Err(messagebus::error::Error::TryAgain(msg)),
         }
     }
 }
@@ -386,64 +215,8 @@ impl ReciveUntypedReceiver for QuicClientRelay {
                     let event = match content_type {
                         0 => { // CBOR
                             let proto: ProtocolPacket = serde_cbor::from_slice(&buff).unwrap();
-                            
-                            use ProtocolHeaderActionKind::*;
-                            match proto.header.kind {
-                                Nop => unimplemented!(),
-                                Response => {
-                                    let tt = String::from_utf8_lossy(proto.header.type_tag.unwrap()).to_string();
-                                    
-                                    let res = if proto.header.failed {
-                                        Err(
-                                            messagebus::error::Error::Other(GenericError {
-                                                type_tag: tt.into(),
-                                                description: "unknown".into()
-                                            }
-                                        ))
-                                    } else {
-                                        let mut cbor_de = serde_cbor::Deserializer::from_slice(proto.body);
-                                        let mut de = <dyn erased_serde::Deserializer>::erase(&mut cbor_de);
-
-                                        bus.deserialize_message(tt.into(), &mut de)
-                                            .map_err(|x| x.map_msg(|_| ()))
-                                    };
-
-                                    Event::Response(proto.header.argument, res)
-                                }
-                                Ready => {
-                                    if proto.header.failed {
-                                        let tt = String::from_utf8_lossy(proto.header.type_tag.unwrap()).to_string();
-                                        Event::InitFailed(messagebus::error::Error::Other(GenericError {
-                                            type_tag: tt.into(),
-                                            description: "unknown".into()
-                                        }))
-                                    } else {
-                                        Event::Ready
-                                    }
-                                }
-                                Exited => Event::Exited,
-                                Pause => Event::Pause,
-                                BatchComplete => Event::Finished(proto.header.argument),
-                                Flushed => Event::Flushed,
-                                Error => {
-                                    let tt = String::from_utf8_lossy(proto.header.type_tag.unwrap()).to_string();
-                                    Event::Error(GenericError {
-                                        type_tag: tt.into(),
-                                        description: "unknown".into()
-                                    })
-                                }
-                                Synchronized => {
-                                    if proto.header.failed {
-                                        let tt = String::from_utf8_lossy(proto.header.type_tag.unwrap()).to_string();
-                                        Event::Synchronized( Err(messagebus::error::Error::Other(GenericError {
-                                            type_tag: tt.into(),
-                                            description: "unknown".into()
-                                        })))
-                                    } else {
-                                        Event::Synchronized(Ok(()))
-                                    }
-                                },
-
+                            match proto.deserialize(&bus).unwrap() {
+                                ProtocolItem::Event(ev) => ev.map_msg(|msg|msg.upcast_box()),
                                 _ => unimplemented!()
                             }
                         },

crates/remote/src/relays/quic/mod.rs

@@ -3,3 +3,6 @@ mod server;
 
 pub use client::QuicClientRelay;
 pub use server::QuicServerRelay;
+
+
+

crates/remote/src/relays/quic/server.rs

@@ -1 +1,258 @@
-pub struct QuicServerRelay {}
+use crate::{error::Error, proto::{BodyType, ProtocolItem, ProtocolPacket}, relays::{GenericEventStream, MessageTable}};
+use futures::{Future, FutureExt, StreamExt};
+use messagebus::{Action, Bus, Event, Message, ReciveUntypedReceiver, SendUntypedReceiver, TypeTag, TypeTagAccept};
+use parking_lot::Mutex;
+use std::{net::SocketAddr, sync::{Arc, atomic::AtomicBool}};
+use tokio::{sync::{mpsc::{self, UnboundedSender, UnboundedReceiver}, oneshot}};
+use bytes::{Buf, BufMut};
+
+pub const ALPN_QUIC_HTTP: &[&[u8]] = &[b"hq-29"];
+
+pub struct QuicServerRelayEndpoint {
+    endpoint: quinn::Endpoint,
+    incoming: Mutex<Option<quinn::Incoming>>,
+}
+
+impl QuicServerRelayEndpoint {
+    pub fn new(key_path: &str, cert_path: &str, addr: &SocketAddr) -> Result<Self, Error> {
+        let mut transport_config = quinn::TransportConfig::default();
+        transport_config.max_concurrent_uni_streams(0)?;
+
+        let mut server_config = quinn::ServerConfig::default();
+        server_config.transport = Arc::new(transport_config);
+        
+        let mut server_config = quinn::ServerConfigBuilder::new(server_config);
+        
+        server_config.protocols(ALPN_QUIC_HTTP);
+        server_config.enable_keylog();
+    
+        let key = std::fs::read(key_path)?;
+        let cert_der = std::fs::read(cert_path)?;
+    
+        let key = quinn::PrivateKey::from_der(&key)?;
+        let cert_chain = quinn::Certificate::from_der(&cert_der)?;
+
+        let cert = quinn::CertificateChain::from_certs([cert_chain]);
+    
+        server_config.certificate(cert, key)?;
+
+        let mut endpoint = quinn::Endpoint::builder();
+        endpoint.listen(server_config.build());
+
+        let (endpoint, incoming) = endpoint.bind(addr)?;
+
+        Ok(Self { endpoint, incoming: Mutex::new(Some(incoming)) })
+    }
+
+    pub fn incoming(&self) -> impl Future<Output = Result<QuicServerConnection, Error>> {
+        let mut conn = self.incoming.lock().take().unwrap();
+
+        async move {
+            let conn = conn.next().await.unwrap();
+            let quinn::NewConnection { connection, .. } = conn.await?;
+            
+            Ok(QuicServerConnection {
+                connection,
+            })
+        }
+    }
+
+    pub fn connect(
+        &self,
+        addr: &SocketAddr,
+        host: &str,
+    ) -> impl Future<Output = Result<QuicServerConnection, Error>> {
+        let conn = self.endpoint.connect(addr, host);
+        
+        async move {
+            let quinn::NewConnection { connection, .. } = conn?.await?;
+
+            Ok(QuicServerConnection {
+                connection,
+            })
+        }
+    }
+
+    #[inline]
+    pub async fn wait_idle(&self) {
+        self.endpoint.wait_idle().await;
+    }
+}
+
+pub struct QuicServerConnection {
+    connection: quinn::Connection,
+}
+
+pub struct QuicServerRelay {
+    ready_flag: AtomicBool,
+    endpoint: QuicServerRelayEndpoint,
+    outgoing_table: MessageTable,
+    sender: UnboundedSender<ProtocolItem>,
+    receiver_send: Mutex<Option<(UnboundedSender<quinn::RecvStream>, UnboundedReceiver<ProtocolItem>)>>,
+    receiver_recv: Mutex<Option<UnboundedReceiver<quinn::RecvStream>>>,
+}
+
+impl QuicServerRelay {
+    pub fn new(key_path: &str, cert_path: &str, addr: SocketAddr, table: Vec<(TypeTag, TypeTag, TypeTag)>) -> Result<Self, Error> {
+        let endpoint = QuicServerRelayEndpoint::new(key_path, cert_path, &addr)?;
+        let (sender, receiver) = mpsc::unbounded_channel();
+        let (recv_send, recv_recv) = mpsc::unbounded_channel();
+
+        Ok(Self {
+            ready_flag: AtomicBool::new(false),
+            endpoint,
+            outgoing_table: MessageTable::from(table),
+            sender,
+            receiver_send: Mutex::new(Some((recv_send, receiver))),
+            receiver_recv: Mutex::new(Some(recv_recv)),
+        })
+    }
+}
+
+impl TypeTagAccept for QuicServerRelay {
+    fn accept(&self, msg: &TypeTag, resp: Option<&TypeTag>, err: Option<&TypeTag>) -> bool {
+        self.outgoing_table.accept(msg, resp, err)
+    }
+
+    fn iter_types(&self, cb: &mut dyn FnMut(&TypeTag, &TypeTag, &TypeTag) -> bool) {
+        let iter = self.outgoing_table.iter_types();
+
+        for (m, r, e) in iter {
+            if cb(m, r, e) {
+                return;
+            }
+        }
+    }
+}
+
+impl SendUntypedReceiver for QuicServerRelay {
+    fn send(&self, msg: Action, _bus: &Bus) -> Result<(), messagebus::error::Error<Action>> {
+        match msg {
+            Action::Init => {
+                let (sender, mut rx) = self.receiver_send.lock().take().unwrap();
+                let conn = self.endpoint.incoming();
+
+                tokio::spawn(async move {
+                    let conn = conn.await.unwrap();
+
+                    let mut body_buff = Vec::new();
+                    let mut header_buff = Vec::new();
+
+                    while let Some(r) = rx.recv().await {
+                        let (mut send, recv) = conn.connection.open_bi().await.unwrap();
+
+                        sender.send(recv).unwrap();
+
+                        body_buff.clear();
+                        header_buff.clear();
+                        
+                        let pkt = r.serialize(BodyType::Cbor, &mut body_buff).unwrap();
+                        serde_cbor::to_writer(&mut header_buff, &pkt).unwrap();
+
+                        let mut buf = [0u8; 16];
+                        let mut writer = &mut buf[..];
+
+                        writer.put(&b"MBUS"[..]);
+                        writer.put_u16(1);
+                        writer.put_u16(0);
+                        writer.put_u64(header_buff.len() as _);
+
+                        send.write_all(&buf).await.unwrap();
+                        send.write_all(&header_buff).await.unwrap();
+                    }
+                });
+            }
+
+            other => self.sender.send(other.into()).unwrap(),
+        }
+
+        Ok(())
+    }
+
+    fn send_msg(
+        &self,
+        mid: u64,
+        msg: Box<dyn Message>,
+        req: bool,
+        _bus: &Bus,
+    ) -> Result<(), messagebus::error::Error<Box<dyn Message>>> {
+        match msg.as_shared_boxed() {
+            Ok(msg) => {
+                if let Err(err) = self.sender.send((mid, msg, req).into()) {
+                    Err(messagebus::error::Error::TryAgain(err.0.unwrap_send().unwrap().1.upcast_box()))
+                } else {
+                    Ok(())
+                }
+            }
+            
+            Err(msg) => Err(messagebus::error::Error::TryAgain(msg)),
+        }
+    }
+}
+
+impl ReciveUntypedReceiver for QuicServerRelay {
+    type Stream = GenericEventStream;
+
+    fn event_stream(&self, bus: Bus) -> Self::Stream {
+        let mut recv = self.receiver_recv.lock().take().unwrap();
+
+        Box::pin(futures::stream::poll_fn(move |cx|recv.poll_recv(cx))
+            .map(move |recv| {
+                let buff = Vec::with_capacity(16);
+                let bus = bus.clone();
+
+                futures::stream::unfold(
+                    (true, recv, bus, buff),
+                    |(first, mut recv, bus, mut buff)| async move {
+                        if first {
+                            return Some((Event::Ready, (false, recv, bus, buff)));
+                        }
+
+                        println!("1");
+
+                        unsafe { buff.set_len(16) };
+                        recv.read_exact(&mut buff).await.unwrap();
+
+                        println!("{:?}", buff);
+
+                        let mut reader = &buff[..];
+                        let mut sign = [0u8; 4];
+                        reader.copy_to_slice(&mut sign);
+                        assert!(&sign != b"MBUS");
+
+                        let version = reader.get_u16();
+                        assert!(version == 1);
+
+                        let content_type = reader.get_u16();
+
+                        let body_size = reader.get_u64();
+                        let diff = buff.capacity() as i64 - body_size as i64;
+                        if diff < 0 {
+                            buff.reserve(-diff as usize);
+                        }
+
+                        unsafe { buff.set_len(body_size as usize); }
+                        recv.read_exact(&mut buff).await.unwrap();
+
+                        println!("{:?}", buff);
+
+                        let event = match content_type {
+                            0 => { // CBOR
+                                let proto: ProtocolPacket = serde_cbor::from_slice(&buff).unwrap();
+                                
+                                match proto.deserialize(&bus).unwrap() {
+                                    ProtocolItem::Event(ev) => ev.map_msg(|msg|msg.upcast_box()),
+                                    _ => unimplemented!()
+                                }
+                            },
+                            _ => unimplemented!()
+                        };
+        
+                        Some((event, (false, recv, bus, buff)))
+                    },
+                )
+            })
+            .flatten()
+        )
+    }
+}

crates/remote/src/relays/redis/mod.rs

@@ -0,0 +1,124 @@
+use messagebus::{Action, Bus, Event, Message, ReciveUntypedReceiver, SendUntypedReceiver, TypeTag, TypeTagAccept};
+
+use crate::error::Error;
+
+use super::{GenericEventStream, MessageTable};
+use futures::StreamExt;
+
+pub struct RedisRelay {
+    in_table: MessageTable,
+    out_table: MessageTable,
+}
+
+impl RedisRelay {
+    fn new(uri: &str) -> Result<Self, Error> {
+        let client = redis::Client::open("redis://127.0.0.1/")?;
+        unimplemented!()
+
+
+
+        // let mut publish_conn = client.get_async_connection().await?;
+        // let mut pubsub_conn = client.get_async_connection().await?.into_pubsub();
+
+        // pubsub_conn.subscribe("wavephone").await?;
+        // let mut pubsub_stream = pubsub_conn.on_message();
+
+        // publish_conn.publish("wavephone", "banana").await?;
+
+        // let pubsub_msg: String = pubsub_stream.next().await.unwrap().get_payload()?;
+        // assert_eq!(&pubsub_msg, "banana");
+
+        // Ok(())
+    }
+} 
+
+impl TypeTagAccept for RedisRelay {
+    fn accept(&self, msg: &TypeTag, resp: Option<&TypeTag>, err: Option<&TypeTag>) -> bool {
+        self.out_table.accept(msg, resp, err)
+    }
+
+    fn iter_types(&self, cb: &mut dyn FnMut(&TypeTag, &TypeTag, &TypeTag) -> bool) {
+        let iter = self.out_table.iter_types();
+
+        for (m, r, e) in iter {
+            if cb(m, r, e) {
+                return;
+            }
+        }
+    }
+}
+
+impl SendUntypedReceiver for RedisRelay {
+    fn send(&self, msg: Action, _bus: &Bus) -> Result<(), messagebus::error::Error<Action>> {
+        match msg {
+            Action::Init => {
+                // let (sender, mut rx) = self.receiver_send.lock().take().unwrap();
+                // let conn = self.endpoint.incoming();
+
+                // tokio::spawn(async move {
+                //     let mut conn = conn.await.unwrap();
+                //     sender.send((conn.recv, conn.connection)).unwrap();
+                //     let mut buf1 = Vec::new();
+                //     let mut buf2 = Vec::new();
+
+                //     while let Some(r) = rx.recv().await {
+                //         r.serialize(&mut buf1, &mut buf2, &mut conn.send)
+                //             .await
+                //             .unwrap();
+
+                //     }
+                // });
+            }
+
+            other => self.sender.send(other.into()).unwrap(),
+        }
+
+        Ok(())
+    }
+
+    fn send_msg(
+        &self,
+        mid: u64,
+        msg: Box<dyn Message>,
+        req: bool,
+        _bus: &Bus,
+    ) -> Result<(), messagebus::error::Error<Box<dyn Message>>> {
+        match msg.as_shared_boxed() {
+            Ok(msg) => {
+                if let Err(err) = self.sender.send((req, mid, msg).into()) {
+                    Err(messagebus::error::Error::TryAgain(err.0.unwrap_msg().unwrap()))
+                } else {
+                    Ok(())
+                }
+            }
+            
+            Err(msg) => Err(messagebus::error::Error::TryAgain(msg)),
+        }
+    }
+}
+
+impl ReciveUntypedReceiver for RedisRelay {
+    type Stream = GenericEventStream;
+
+    fn event_stream(&self, bus: Bus) -> Self::Stream {
+        let recevier = self.recevier.lock().take().unwrap();
+
+        Box::pin(
+            futures::stream::unfold((recevier, bus), |(recv, bus)| async move {
+                if let Ok(r) = recv.next().await? {
+                    let stream = futures::stream::unfold((true, r, bus.clone()), |(first, r, bus)| async move {
+                        if first {
+                            return Some((Event::Ready, (false, r, bus)));
+                        }
+                        
+                        Some((Event::Pause, (false, r, bus)))
+                    });
+
+                    Some((stream.left_stream(), (recv, bus)))
+                } else {
+                    Some((futures::stream::once(async move { Event::Pause }).right_stream(), (recv, bus)))
+                }
+            }).flatten()
+        )
+    }
+}

src/builder.rs

@@ -6,20 +6,13 @@ use futures::{Future, FutureExt};
 use smallvec::SmallVec;
 use tokio::sync::Mutex;
 
-use crate::{
-    envelop::TypeTag,
-    error::{Error, StdSyncSendError},
-    receiver::{
+use crate::{AsyncBatchHandler, AsyncBatchSynchronizedHandler, AsyncHandler, AsyncSynchronizedHandler, BatchHandler, BatchSynchronizedHandler, Bus, BusInner, Handler, Message, Relay, SharedMessage, SynchronizedHandler, Untyped, envelop::{IntoSharedMessage, TypeTag}, error::{Error, StdSyncSendError}, receiver::{
         BusPollerCallback, Receiver, ReciveTypedReceiver, SendTypedReceiver, SendUntypedReceiver,
         UntypedPollerCallback,
-    },
-    receivers, AsyncBatchHandler, AsyncBatchSynchronizedHandler, AsyncHandler,
-    AsyncSynchronizedHandler, BatchHandler, BatchSynchronizedHandler, Bus, BusInner, Handler,
-    IntoBoxedMessage, Message, Relay, SynchronizedHandler, Untyped,
-};
+    }, receivers};
 
 type MessageDeserializerCallback = Box<
-    dyn Fn(&mut dyn erased_serde::Deserializer<'_>) -> Result<Box<dyn Message>, Error>
+    dyn Fn(&mut dyn erased_serde::Deserializer<'_>) -> Result<Box<dyn SharedMessage>, Error>
         + Send
         + Sync,
 >;
@@ -219,7 +212,7 @@ impl MessageTypeDescriptor {
     pub fn deserialize_boxed(
         &self,
         de: &mut dyn erased_serde::Deserializer<'_>,
-    ) -> Result<Box<dyn Message>, Error> {
+    ) -> Result<Box<dyn SharedMessage>, Error> {
         (self.de)(de)
     }
 }
@@ -249,7 +242,7 @@ impl Module {
         self.message_types.insert(
             M::type_tag_(),
             MessageTypeDescriptor {
-                de: Box::new(move |de| Ok(M::deserialize(de)?.into_boxed())),
+                de: Box::new(move |de| Ok(M::deserialize(de)?.into_shared())),
             },
         );
 

src/envelop.rs

@@ -154,8 +154,29 @@ impl<T: Message> IntoBoxedMessage for T {
     }
 }
 
-pub trait SharedMessage: Message + erased_serde::Serialize {}
-impl<T: Message + erased_serde::Serialize> SharedMessage for T {}
+pub trait IntoSharedMessage {
+    fn into_shared(self) -> Box<dyn SharedMessage>;
+}
+
+impl<T: Message + serde::Serialize> IntoSharedMessage for T {
+    fn into_shared(self) -> Box<dyn SharedMessage> {
+        Box::new(self)
+    }
+}
+
+
+pub trait SharedMessage: Message + erased_serde::Serialize {
+    fn upcast_arc(self: Arc<Self>) -> Arc<dyn Message>;
+    fn upcast_box(self: Box<Self>) -> Box<dyn Message>;
+    fn upcast_ref(&self) -> &dyn Message;
+    fn upcast_mut(&mut self) -> &mut dyn Message;
+}
+impl<T: Message + erased_serde::Serialize> SharedMessage for T {
+    fn upcast_arc(self: Arc<Self>) -> Arc<dyn Message> { self }
+    fn upcast_box(self: Box<Self>) -> Box<dyn Message> { self }
+    fn upcast_ref(&self) -> &dyn Message { self }
+    fn upcast_mut(&mut self) -> &mut dyn Message { self }
+}
 
 // pub trait IntoTakeable {
 //     fn into_takeable(&mut self) -> Takeable<'_>;

src/lib.rs

@@ -553,7 +553,7 @@ impl Bus {
 
         if let Some(rs) = self.inner.receivers.get(&tt).and_then(|rs| rs.first()) {
             let msg = self.deserialize_message(tt.clone(), de)?;
-            Ok(rs.send_boxed(self, mid, msg, false, rs.reserve(&tt).await)?)
+            Ok(rs.send_boxed(self, mid, msg.upcast_box(), false, rs.reserve(&tt).await)?)
         } else {
             Err(Error::NoReceivers)
         }
@@ -578,7 +578,7 @@ impl Bus {
             rc.send_boxed(
                 self,
                 mid | 1 << (usize::BITS - 1),
-                msg,
+                msg.upcast_box(),
                 true,
                 rc.reserve(&tt).await,
             )?;
@@ -593,7 +593,7 @@ impl Bus {
         &self,
         tt: TypeTag,
         de: &mut dyn erased_serde::Deserializer<'_>,
-    ) -> Result<Box<dyn Message>, Error<Box<dyn Message>>> {
+    ) -> Result<Box<dyn SharedMessage>, Error<Box<dyn Message>>> {
         let md = self
             .inner
             .message_types

src/receiver.rs

@@ -152,7 +152,7 @@ pub enum Event<M, E: StdSyncSendError> {
     Response(u64, Result<M, Error<(), E>>),
     Synchronized(Result<(), Error<(), E>>),
     Finished(u64),
-    Error(E),
+    Error(Error<(), E>),
     InitFailed(Error<(), E>),
     Stats(Stats),
     Flushed,
@@ -161,6 +161,23 @@ pub enum Event<M, E: StdSyncSendError> {
     Pause,
 }
 
+impl<M, E: StdSyncSendError> Event<M, E> {
+    pub fn map_msg<U, F: FnOnce(M) -> U>(self, f: F) -> Event<U, E> {
+        match self {
+            Event::Response(mid, res) => Event::Response(mid, res.map(f)),
+            Event::Synchronized(res) => Event::Synchronized(res),
+            Event::Finished(cnt) => Event::Finished(cnt),
+            Event::Error(err) => Event::Error(err),
+            Event::InitFailed(err) => Event::InitFailed(err),
+            Event::Stats(st) => Event::Stats(st),
+            Event::Flushed => Event::Flushed,
+            Event::Exited => Event::Exited,
+            Event::Ready => Event::Ready,
+            Event::Pause => Event::Pause,
+        }
+    }
+}
+
 struct ReceiverWrapper<M, R, E, S>
 where
     M: Message,

src/receivers/mod.rs

@@ -40,7 +40,7 @@ macro_rules! process_batch_result {
                         .unwrap();
                 }
 
-                $stx.send(Event::Error(er)).unwrap();
+                $stx.send(Event::Error(Error::Other(er))).unwrap();
             }
         }
     };