Made code (mostly) runtime and transport independent

Cargo.toml

@@ -33,8 +33,8 @@ criterion = "0.3"
 bench = false
 
 [[bench]]
-name = "pub_sub" 
-harness = false 
+name = "pub_sub"
+harness = false
 bench = false # Don't actually benchmark this, until we fix it
 
 [[bench]]

src/codec/framed.rs

@@ -0,0 +1,34 @@
+//! General types and traits to facilitate compatibility across async runtimes
+
+use crate::codec::ZmqCodec;
+
+// We use dynamic dispatch to avoid complicated generics and simplify things
+type Inner = futures_codec::Framed<Box<dyn Frameable>, ZmqCodec>;
+
+// Enables us to have multiple bounds on the dyn trait in `InnerFramed`
+pub trait Frameable: futures::AsyncWrite + futures::AsyncRead + Unpin + Send {}
+impl<T> Frameable for T where T: futures::AsyncWrite + futures::AsyncRead + Unpin + Send {}
+
+/// Equivalent to [`futures_codec::Framed<T, ZmqCodec>`] or
+/// [`tokio_util::codec::Framed`]
+pub(crate) struct FramedIo(Inner);
+impl FramedIo {
+    pub fn new(frameable: Box<dyn Frameable>) -> Self {
+        let inner = futures_codec::Framed::new(frameable, ZmqCodec::new());
+        Self(inner)
+    }
+}
+
+impl std::ops::Deref for FramedIo {
+    type Target = Inner;
+
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl std::ops::DerefMut for FramedIo {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}

src/codec/mod.rs

@@ -1,11 +1,13 @@
 mod command;
 mod error;
+mod framed;
 mod greeting;
 mod mechanism;
 mod zmq_codec;
 
 pub(crate) use command::{ZmqCommand, ZmqCommandName};
 pub(crate) use error::{CodecError, CodecResult};
+pub(crate) use framed::FramedIo;
 pub(crate) use greeting::ZmqGreeting;
 pub(crate) use zmq_codec::ZmqCodec;
 

src/dealer_router.rs

@@ -2,21 +2,21 @@ use async_trait::async_trait;
 use dashmap::DashMap;
 use futures::channel::{mpsc, oneshot};
 use futures::lock::Mutex;
+use futures::stream::{FuturesUnordered, StreamExt};
 use futures::SinkExt;
-use futures_codec::Framed;
+use std::collections::HashMap;
 use std::convert::TryInto;
 use std::sync::Arc;
-use tokio::net::TcpStream;
 
+use crate::codec::FramedIo;
 use crate::codec::*;
 use crate::endpoint::{Endpoint, TryIntoEndpoint};
 use crate::error::*;
 use crate::message::*;
-use crate::util::*;
-use crate::{util, MultiPeer, Socket, SocketBackend};
+use crate::transport;
+use crate::util::{self, Peer, PeerIdentity};
+use crate::{MultiPeer, Socket, SocketBackend};
 use crate::{SocketType, ZmqResult};
-use futures::stream::{FuturesUnordered, StreamExt};
-use std::collections::HashMap;
 
 struct RouterSocketBackend {
     pub(crate) peers: Arc<DashMap<PeerIdentity, Peer>>,
@@ -97,8 +97,12 @@ impl Socket for RouterSocket {
 
     async fn bind(&mut self, endpoint: impl TryIntoEndpoint + 'async_trait) -> ZmqResult<Endpoint> {
         let endpoint = endpoint.try_into()?;
-        let (endpoint, stop_handle) =
-            util::start_accepting_connections(endpoint, self.backend.clone()).await?;
+        let Endpoint::Tcp(host, port) = endpoint;
+
+        let cloned_backend = self.backend.clone();
+        let cback = move |result| util::peer_connected(result, cloned_backend.clone());
+        let (endpoint, stop_handle) = transport::tcp::begin_accept(host, port, cback).await?;
+
         self.binds.insert(endpoint.clone(), stop_handle);
         Ok(endpoint)
     }
@@ -159,7 +163,7 @@ impl RouterSocket {
 }
 
 pub struct DealerSocket {
-    pub(crate) _inner: Framed<TcpStream, ZmqCodec>,
+    pub(crate) _inner: FramedIo,
 }
 
 impl DealerSocket {

src/error.rs

@@ -3,6 +3,8 @@ use crate::ZmqMessage;
 
 use thiserror::Error;
 
+pub type ZmqResult<T> = Result<T, ZmqError>;
+
 #[derive(Error, Debug)]
 pub enum ZmqError {
     #[error(transparent)]

src/lib.rs

@@ -1,14 +1,4 @@
 #![recursion_limit = "1024"]
-#[macro_use]
-extern crate enum_primitive_derive;
-use num_traits::ToPrimitive;
-
-use async_trait::async_trait;
-use futures::channel::{mpsc, oneshot};
-use std::convert::TryFrom;
-use std::fmt::{Debug, Display};
-
-use futures_codec::Framed;
 
 mod codec;
 mod dealer_router;
@@ -20,21 +10,30 @@ mod r#pub;
 mod rep;
 mod req;
 mod sub;
+mod transport;
 pub mod util;
 
-use crate::codec::*;
 pub use crate::dealer_router::*;
 pub use crate::endpoint::{Endpoint, Host, Transport, TryIntoEndpoint};
-pub use crate::error::ZmqError;
+pub use crate::error::{ZmqError, ZmqResult};
 pub use crate::r#pub::*;
 pub use crate::rep::*;
 pub use crate::req::*;
 pub use crate::sub::*;
-use crate::util::*;
 pub use message::*;
-use std::collections::HashMap;
 
-pub type ZmqResult<T> = Result<T, ZmqError>;
+use crate::codec::*;
+use crate::util::*;
+
+#[macro_use]
+extern crate enum_primitive_derive;
+
+use async_trait::async_trait;
+use futures::channel::{mpsc, oneshot};
+use num_traits::ToPrimitive;
+use std::collections::HashMap;
+use std::convert::TryFrom;
+use std::fmt::{Debug, Display};
 
 #[derive(Clone, Copy, Debug, PartialEq, Primitive)]
 pub enum SocketType {

src/pub.rs

@@ -1,8 +1,10 @@
 use crate::codec::*;
 use crate::endpoint::{Endpoint, TryIntoEndpoint};
 use crate::message::*;
+use crate::transport;
 use crate::util::*;
 use crate::{util, MultiPeer, NonBlockingSend, Socket, SocketBackend, SocketType, ZmqResult};
+
 use async_trait::async_trait;
 use dashmap::DashMap;
 use futures::channel::{mpsc, oneshot};
@@ -145,8 +147,12 @@ impl Socket for PubSocket {
 
     async fn bind(&mut self, endpoint: impl TryIntoEndpoint + 'async_trait) -> ZmqResult<Endpoint> {
         let endpoint = endpoint.try_into()?;
-        let (endpoint, stop_handle) =
-            util::start_accepting_connections(endpoint, self.backend.clone()).await?;
+        let Endpoint::Tcp(host, port) = endpoint;
+
+        let cloned_backend = self.backend.clone();
+        let cback = move |result| util::peer_connected(result, cloned_backend.clone());
+        let (endpoint, stop_handle) = transport::tcp::begin_accept(host, port, cback).await?;
+
         self.binds.insert(endpoint.clone(), stop_handle);
         Ok(endpoint)
     }
@@ -155,8 +161,8 @@ impl Socket for PubSocket {
         let endpoint = endpoint.try_into()?;
         let Endpoint::Tcp(host, port) = endpoint;
 
-        let raw_socket = tokio::net::TcpStream::connect((host.to_string().as_str(), port)).await?;
-        util::peer_connected(raw_socket, self.backend.clone()).await;
+        let connect_result = transport::tcp::connect(host, port).await;
+        util::peer_connected(connect_result, self.backend.clone()).await;
         Ok(())
     }
 

src/rep.rs

@@ -2,15 +2,17 @@ use crate::codec::*;
 use crate::endpoint::{Endpoint, TryIntoEndpoint};
 use crate::error::*;
 use crate::fair_queue::FairQueue;
+use crate::transport;
 use crate::util::FairQueueProcessor;
 use crate::*;
 use crate::{util, SocketType, ZmqResult};
+
 use async_trait::async_trait;
 use dashmap::DashMap;
-use futures_util::sink::SinkExt;
+use futures::SinkExt;
+use futures::StreamExt;
 use std::collections::HashMap;
 use std::sync::Arc;
-use tokio::stream::StreamExt;
 
 struct RepPeer {
     pub(crate) _identity: PeerIdentity,
@@ -66,8 +68,12 @@ impl Socket for RepSocket {
 
     async fn bind(&mut self, endpoint: impl TryIntoEndpoint + 'async_trait) -> ZmqResult<Endpoint> {
         let endpoint = endpoint.try_into()?;
-        let (endpoint, stop_handle) =
-            util::start_accepting_connections(endpoint, self.backend.clone()).await?;
+        let Endpoint::Tcp(host, port) = endpoint;
+
+        let cloned_backend = self.backend.clone();
+        let cback = move |result| util::peer_connected(result, cloned_backend.clone());
+        let (endpoint, stop_handle) = transport::tcp::begin_accept(host, port, cback).await?;
+
         self.binds.insert(endpoint.clone(), stop_handle);
         Ok(endpoint)
     }
@@ -76,8 +82,8 @@ impl Socket for RepSocket {
         let endpoint = endpoint.try_into()?;
         let Endpoint::Tcp(host, port) = endpoint;
 
-        let raw_socket = tokio::net::TcpStream::connect((host.to_string().as_str(), port)).await?;
-        util::peer_connected(raw_socket, self.backend.clone()).await;
+        let connect_result = transport::tcp::connect(host, port).await;
+        util::peer_connected(connect_result, self.backend.clone()).await;
         Ok(())
     }
 

src/req.rs

@@ -1,18 +1,19 @@
 use crate::codec::*;
 use crate::endpoint::{Endpoint, TryIntoEndpoint};
 use crate::error::*;
+use crate::transport;
 use crate::util::{self, Peer, PeerIdentity};
 use crate::*;
 use crate::{SocketType, ZmqResult};
+
 use async_trait::async_trait;
 use crossbeam::queue::SegQueue;
 use dashmap::DashMap;
 use futures::channel::{mpsc, oneshot};
 use futures::lock::Mutex;
-use futures_util::sink::SinkExt;
+use futures::{SinkExt, StreamExt};
 use std::collections::HashMap;
 use std::sync::Arc;
-use tokio::stream::StreamExt;
 
 struct ReqSocketBackend {
     pub(crate) peers: DashMap<PeerIdentity, Peer>,
@@ -124,8 +125,12 @@ impl Socket for ReqSocket {
 
     async fn bind(&mut self, endpoint: impl TryIntoEndpoint + 'async_trait) -> ZmqResult<Endpoint> {
         let endpoint = endpoint.try_into()?;
-        let (endpoint, stop_handle) =
-            util::start_accepting_connections(endpoint, self.backend.clone()).await?;
+        let Endpoint::Tcp(host, port) = endpoint;
+
+        let cloned_backend = self.backend.clone();
+        let cback = move |result| util::peer_connected(result, cloned_backend.clone());
+        let (endpoint, stop_handle) = transport::tcp::begin_accept(host, port, cback).await?;
+
         self.binds.insert(endpoint.clone(), stop_handle);
         Ok(endpoint)
     }
@@ -134,8 +139,8 @@ impl Socket for ReqSocket {
         let endpoint = endpoint.try_into()?;
         let Endpoint::Tcp(host, port) = endpoint;
 
-        let raw_socket = tokio::net::TcpStream::connect((host.to_string().as_str(), port)).await?;
-        util::peer_connected(raw_socket, self.backend.clone()).await;
+        let connect_result = transport::tcp::connect(host, port).await;
+        util::peer_connected(connect_result, self.backend.clone()).await;
         Ok(())
     }
 

src/sub.rs

@@ -2,15 +2,15 @@ use crate::codec::*;
 use crate::endpoint::{Endpoint, TryIntoEndpoint};
 use crate::fair_queue::FairQueue;
 use crate::message::*;
+use crate::transport;
 use crate::util::*;
 use crate::{util, BlockingRecv, MultiPeer, Socket, SocketBackend, SocketType, ZmqResult};
+
 use async_trait::async_trait;
 use bytes::{BufMut, BytesMut};
 use dashmap::DashMap;
 use futures::channel::{mpsc, oneshot};
-use futures::SinkExt;
-use futures::StreamExt;
-
+use futures::{SinkExt, StreamExt};
 use std::collections::HashMap;
 use std::sync::Arc;
 
@@ -147,8 +147,12 @@ impl Socket for SubSocket {
 
     async fn bind(&mut self, endpoint: impl TryIntoEndpoint + 'async_trait) -> ZmqResult<Endpoint> {
         let endpoint = endpoint.try_into()?;
-        let (endpoint, stop_handle) =
-            util::start_accepting_connections(endpoint, self.backend.clone()).await?;
+        let Endpoint::Tcp(host, port) = endpoint;
+
+        let cloned_backend = self.backend.clone();
+        let cback = move |result| util::peer_connected(result, cloned_backend.clone());
+        let (endpoint, stop_handle) = transport::tcp::begin_accept(host, port, cback).await?;
+
         self.binds.insert(endpoint.clone(), stop_handle);
         Ok(endpoint)
     }
@@ -157,8 +161,8 @@ impl Socket for SubSocket {
         let endpoint = endpoint.try_into()?;
         let Endpoint::Tcp(host, port) = endpoint;
 
-        let raw_socket = tokio::net::TcpStream::connect((host.to_string().as_str(), port)).await?;
-        util::peer_connected(raw_socket, self.backend.clone()).await;
+        let connect_result = transport::tcp::connect(host, port).await;
+        util::peer_connected(connect_result, self.backend.clone()).await;
         Ok(())
     }
 

src/transport/mod.rs

@@ -0,0 +1 @@
+pub mod tcp;

src/transport/tcp/mod.rs

@@ -0,0 +1,30 @@
+// TODO: Conditionally compile things
+mod tokio;
+
+use self::tokio as tk;
+use crate::codec::FramedIo;
+use crate::endpoint::{Endpoint, Host, Port};
+use crate::ZmqResult;
+
+use std::net::SocketAddr;
+
+pub(crate) async fn connect(host: Host, port: Port) -> ZmqResult<(FramedIo, SocketAddr)> {
+    tk::connect(host, port).await
+}
+
+/// Spawns an async task that listens for tcp connections at the provided
+/// address.
+///
+/// `cback` will be invoked when a tcp connection is accepted. If the result was
+/// `Ok`, we get a tuple containing the framed raw socket, along with the ip
+/// address of the remote connection accepted.
+pub(crate) async fn begin_accept<T>(
+    host: Host,
+    port: Port,
+    cback: impl Fn(ZmqResult<(FramedIo, SocketAddr)>) -> T + Send + 'static,
+) -> ZmqResult<(Endpoint, futures::channel::oneshot::Sender<bool>)>
+where
+    T: std::future::Future<Output = ()> + Send + 'static,
+{
+    tk::begin_accept(host, port, cback).await
+}