fix(tonic): Remove Sync requirement for streams (#804)

examples/src/authentication/server.rs

@@ -8,7 +8,7 @@ use std::pin::Pin;
 use tonic::{metadata::MetadataValue, transport::Server, Request, Response, Status, Streaming};
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Default)]
 pub struct EchoServer;

examples/src/dynamic_load_balance/server.rs

@@ -11,7 +11,7 @@ use tonic::{transport::Server, Request, Response, Status, Streaming};
 use pb::{EchoRequest, EchoResponse};
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Debug)]
 pub struct EchoServer {

examples/src/hyper_warp_multiplex/server.rs

@@ -35,7 +35,7 @@ use echo::{
     EchoRequest, EchoResponse,
 };
 
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Default)]
 pub struct MyGreeter {}

examples/src/load_balance/server.rs

@@ -11,7 +11,7 @@ use tonic::{transport::Server, Request, Response, Status, Streaming};
 use pb::{EchoRequest, EchoResponse};
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Debug)]
 pub struct EchoServer {

examples/src/multiplex/server.rs

@@ -20,7 +20,7 @@ use echo::{
     EchoRequest, EchoResponse,
 };
 
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {

examples/src/routeguide/server.rs

@@ -102,8 +102,7 @@ impl RouteGuide for RouteGuideService {
         Ok(Response::new(summary))
     }
 
-    type RouteChatStream =
-        Pin<Box<dyn Stream<Item = Result<RouteNote, Status>> + Send + Sync + 'static>>;
+    type RouteChatStream = Pin<Box<dyn Stream<Item = Result<RouteNote, Status>> + Send + 'static>>;
 
     async fn route_chat(
         &self,

examples/src/streaming/server.rs

@@ -12,7 +12,7 @@ use tonic::{transport::Server, Request, Response, Status, Streaming};
 use pb::{EchoRequest, EchoResponse};
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Debug)]
 pub struct EchoServer {}

examples/src/tls/server.rs

@@ -14,7 +14,7 @@ use tonic::{
 };
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Default)]
 pub struct EchoServer;

examples/src/tls_client_auth/server.rs

@@ -9,7 +9,7 @@ use tonic::transport::{Certificate, Identity, Server, ServerTlsConfig};
 use tonic::{Request, Response, Status};
 
 type EchoResult<T> = Result<Response<T>, Status>;
-type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send + Sync>>;
+type ResponseStream = Pin<Box<dyn Stream<Item = Result<EchoResponse, Status>> + Send>>;
 
 #[derive(Default)]
 pub struct EchoServer;