Add server docs

tonic-examples/Cargo.toml

@@ -24,7 +24,6 @@ path = "src/routeguide/client.rs"
 
 [dependencies]
 tonic = { path = "../tonic" }
-hyper = { git = "https://github.com/hyperium/hyper" }
 futures-preview = { version = "=0.3.0-alpha.18", default-features = false, features = ["alloc"]}
 tokio = "=0.2.0-alpha.4"
 prost = "0.5"

tonic-examples/src/routeguide/server.rs

@@ -1,12 +1,12 @@
 mod data;
 
 use futures::{Stream, StreamExt};
-use hyper::Server;
 use std::collections::HashMap;
 use std::hash::{Hash, Hasher};
 use std::sync::Arc;
 use std::time::Instant;
 use tokio::sync::{mpsc, Lock};
+use tonic::transport::Server;
 use tonic::{Request, Response, Status};
 
 pub mod routeguide {
@@ -159,9 +159,8 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         },
     };
 
-    Server::bind(&addr)
+    Server::builder()
-        .http2_only(true)
+        .serve(addr, RouteGuideServer::new(route_guide))
-        .serve(RouteGuideServer::new(route_guide))
         .await?;
 
     Ok(())

tonic-macros/src/service.rs

@@ -106,7 +106,7 @@ pub(crate) fn generate(service: ServiceDef) -> TokenStream {
             }
         }
 
-        impl Service<http::Request<hyper::Body>> for #server_service {
+        impl Service<http::Request<tonic::_codegen::HyperBody>> for #server_service {
             type Response = http::Response<tonic::BoxBody>;
             type Error = tonic::error::Never;
             type Future = BoxFuture<Self::Response, Self::Error>;
@@ -115,7 +115,7 @@ pub(crate) fn generate(service: ServiceDef) -> TokenStream {
                 Poll::Ready(Ok(()))
             }
 
-            fn call(&mut self, req: http::Request<hyper::Body>) -> Self::Future {
+            fn call(&mut self, req: http::Request<tonic::_codegen::HyperBody>) -> Self::Future {
                 let inner = self.inner.clone();
 
                 match req.uri().path() {

tonic/Cargo.toml

@@ -21,7 +21,7 @@ http-body = "0.2.0-alpha.1"
 pin-project = "0.4.0-alpha.7"
 
 # optional
-hyper = { git = "https://github.com/hyperium/hyper", optional = true}
+hyper = { version = "=0.13.0-alpha.1", optional = true}
 tokio = { version = "=0.2.0-alpha.4", default-features = false, features = ["tcp"], optional = true }
 tower-make = "=0.1.0-alpha.2"
 tower-reconnect = { git = "https://github.com/tower-rs/tower", branch = "lucio/update-reconnect-buffer", optional = true }

tonic/src/lib.rs

@@ -37,6 +37,9 @@ pub mod _codegen {
     pub use std::task::{Context, Poll};
     pub use tower_service::Service;
 
+    #[cfg(feature = "transport")]
+    pub use hyper::Body as HyperBody;
+
     pub type BoxFuture<T, E> =
         self::Pin<Box<dyn self::Future<Output = Result<T, E>> + Send + 'static>>;
     pub type BoxStream<T> =

tonic/src/server/grpc.rs

@@ -1,14 +1,22 @@
 use crate::{
-    body::BoxBody,
     codec::{encode_server, Codec, Streaming},
     server::{ClientStreamingService, ServerStreamingService, StreamingService, UnaryService},
-    Code, Request, Response, Status,
+    BoxBody, Code, Request, Response, Status,
 };
 use bytes::Bytes;
 use futures_core::TryStream;
 use futures_util::{future, stream, TryStreamExt};
 use http_body::Body;
 
+/// A gRPC Server handler.
+///
+/// This will wrap some inner [`Codec`] and provide utilities to handle
+/// inbound unary, client side streaming, server side streaming, and
+/// bi-directional streaming.
+///
+/// Each request handler method accepts some service that implements the
+/// corresponding service trait and a http request that contains some body that
+/// implements some [`Body`].
 pub struct Grpc<T> {
     codec: T,
 }
@@ -21,10 +29,12 @@ where
     T::Encoder: Send + 'static,
     T::Encode: Send + Unpin + 'static,
 {
+    /// Creates a new gRPC client with the provided [`Codec`].
     pub fn new(codec: T) -> Self {
         Self { codec }
     }
 
+    /// Handle a single unary gRPC request.
     pub async fn unary<S, B>(
         &mut self,
         mut service: S,
@@ -54,6 +64,7 @@ where
         self.map_response(response)
     }
 
+    // Handle a server side streaming request.
     pub async fn server_streaming<S, B>(
         &mut self,
         mut service: S,
@@ -78,7 +89,7 @@ where
         self.map_response(response)
     }
 
-    //BoxStream<T::Decode>,
+    /// Handle a client side streaming gRPC request.
     pub async fn client_streaming<S, B>(
         &mut self,
         mut service: S,
@@ -100,6 +111,7 @@ where
         self.map_response(response)
     }
 
+    /// Handle a bi-directional streaming gRPC request.
     pub async fn streaming<S, B>(
         &mut self,
         mut service: S,

tonic/src/server/mod.rs

@@ -1,3 +1,13 @@
+//! gRPC over HTTP2 server implementation.
+//!
+//! This module contains the low level components to build a gRPC server. It
+//! provides a codec agnostic gRPC server handler.
+//!
+//! The items in this module are generally desgined to be used by some codegen
+//! tool that will provide the user some custom way to implement the server that
+//! will implement the proper gRPC service. Thusly, they are a bit hard to use
+//! by hand.
+
 mod grpc;
 mod service;
 

tonic/src/server/service.rs

@@ -1,7 +1,12 @@
 use crate::{Request, Response, Status};
 use futures_core::Stream;
 use std::future::Future;
+use tower_service::Service;
 
+/// A specialization of tower_service::Service.
+///
+/// Existing tower_service::Service implementations with the correct form will
+/// automatically implement `UnaryService`.
 pub trait UnaryService<R> {
     /// Protobuf response message type
     type Response;
@@ -13,12 +18,28 @@ pub trait UnaryService<R> {
     fn call(&mut self, request: Request<R>) -> Self::Future;
 }
 
+impl<T, M1, M2> UnaryService<M1> for T
+where
+    T: Service<Request<M1>, Response = Response<M2>, Error = crate::Status>,
+{
+    type Response = M2;
+    type Future = T::Future;
+
+    fn call(&mut self, request: Request<M1>) -> Self::Future {
+        Service::call(self, request)
+    }
+}
+
+/// A specialization of tower_service::Service.
+///
+/// Existing tower_service::Service implementations with the correct form will
+/// automatically implement `ServerStreamingService`.
 pub trait ServerStreamingService<R> {
     /// Protobuf response message type
     type Response;
 
     /// Stream of outbound response messages
-    type ResponseStream: Stream<Item = Result<Self::Response, Status>> + Unpin;
+    type ResponseStream: Stream<Item = Result<Self::Response, Status>>;
 
     /// Response future
     type Future: Future<Output = Result<Response<Self::ResponseStream>, Status>>;
@@ -27,6 +48,24 @@ pub trait ServerStreamingService<R> {
     fn call(&mut self, request: Request<R>) -> Self::Future;
 }
 
+impl<T, S, M1, M2> ServerStreamingService<M1> for T
+where
+    T: Service<Request<M1>, Response = Response<S>, Error = crate::Status>,
+    S: Stream<Item = Result<M2, crate::Status>>,
+{
+    type Response = M2;
+    type ResponseStream = S;
+    type Future = T::Future;
+
+    fn call(&mut self, request: Request<M1>) -> Self::Future {
+        Service::call(self, request)
+    }
+}
+
+/// A specialization of tower_service::Service.
+///
+/// Existing tower_service::Service implementations with the correct form will
+/// automatically implement `ClientStreamingService`.
 pub trait ClientStreamingService<RequestStream> {
     /// Protobuf response message type
     type Response;
@@ -38,12 +77,29 @@ pub trait ClientStreamingService<RequestStream> {
     fn call(&mut self, request: Request<RequestStream>) -> Self::Future;
 }
 
+impl<T, M1, M2, S> ClientStreamingService<S> for T
+where
+    T: Service<Request<S>, Response = Response<M2>, Error = crate::Status>,
+    S: Stream<Item = Result<M1, crate::Status>>,
+{
+    type Response = M2;
+    type Future = T::Future;
+
+    fn call(&mut self, request: Request<S>) -> Self::Future {
+        Service::call(self, request)
+    }
+}
+
+/// A specialization of tower_service::Service.
+///
+/// Existing tower_service::Service implementations with the correct form will
+/// automatically implement `StreamingService`.
 pub trait StreamingService<RequestStream> {
     /// Protobuf response message type
     type Response;
 
     /// Stream of outbound response messages
-    type ResponseStream: Stream<Item = Result<Self::Response, Status>> + Unpin;
+    type ResponseStream: Stream<Item = Result<Self::Response, Status>>;
 
     /// Response future
     type Future: Future<Output = Result<Response<Self::ResponseStream>, Status>>;
@@ -51,3 +107,18 @@ pub trait StreamingService<RequestStream> {
     /// Call the service
     fn call(&mut self, request: Request<RequestStream>) -> Self::Future;
 }
+
+impl<T, S1, S2, M1, M2> StreamingService<S1> for T
+where
+    T: Service<Request<S1>, Response = Response<S2>, Error = crate::Status>,
+    S1: Stream<Item = Result<M1, crate::Status>>,
+    S2: Stream<Item = Result<M2, crate::Status>>,
+{
+    type Response = M2;
+    type ResponseStream = S2;
+    type Future = T::Future;
+
+    fn call(&mut self, request: Request<S1>) -> Self::Future {
+        Service::call(self, request)
+    }
+}