Update to Tokio 1.0 (#628)

* WIP: Update to Tokio 1.0

* ipc: Migrate remaining Unix test code to Tokio 1.0

* core-client: Don't depend on unused hyper/server feature

* http: Fix used feature set by hyper

* WIP: Bump to the transferred parity-tokio-ipc repo

* Use newly released version of parity-tokio-ipc

* Remove extra newline in Cargo.toml

* Refactor suspension slightly in SuspendableStream

core-client/transports/Cargo.toml

@@ -44,11 +44,11 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 url = "1.7"
 
-hyper = { version = "0.13", optional = true }
-hyper-tls = { version = "0.4", optional = true }
+hyper = { version = "0.14", features = ["client", "http1"], optional = true }
+hyper-tls = { version = "0.5", optional = true }
 jsonrpc-server-utils = { version = "17.1", path = "../../server-utils", optional = true }
-parity-tokio-ipc = { version = "0.8", optional = true }
-tokio = { version = "0.2", optional = true }
+parity-tokio-ipc = { version = "0.9", optional = true }
+tokio = { version = "1", optional = true }
 websocket = { version = "0.24", optional = true }
 
 [dev-dependencies]

http/Cargo.toml

@@ -12,7 +12,7 @@ version = "17.1.0"
 
 [dependencies]
 futures = "0.3"
-hyper = "0.13"
+hyper = { version = "0.14", features = ["http1", "tcp", "server",  "stream"] }
 jsonrpc-core = { version = "17.1", path = "../core" }
 jsonrpc-server-utils = { version = "17.1", path = "../server-utils" }
 log = "0.4"

ipc/Cargo.toml

@@ -15,15 +15,15 @@ log = "0.4"
 tower-service = "0.3"
 jsonrpc-core = { version = "17.1", path = "../core" }
 jsonrpc-server-utils = { version = "17.1", path = "../server-utils", default-features = false }
-parity-tokio-ipc = "0.8"
+parity-tokio-ipc = "0.9"
 parking_lot = "0.11.0"
 
 [dev-dependencies]
 env_logger = "0.7"
 lazy_static = "1.0"
 
 [target.'cfg(not(windows))'.dev-dependencies]
-tokio = { version = "0.2", default-features = false, features = ["uds", "time", "rt-threaded", "io-driver"] }
+tokio = { version = "1", default-features = false, features = ["net", "time", "rt-multi-thread"] }
 
 [badges]
 travis-ci = { repository = "paritytech/jsonrpc", branch = "master"}

ipc/src/server.rs

@@ -360,7 +360,7 @@ mod tests {
 			reply.expect("there should be one reply")
 		};
 
-		let mut rt = tokio::runtime::Runtime::new().unwrap();
+		let rt = tokio::runtime::Runtime::new().unwrap();
 		rt.block_on(reply).expect("wait for reply")
 	}
 
@@ -609,9 +609,10 @@ mod tests {
 			tx.send(true).expect("failed to report that the server has stopped");
 		});
 
-		let mut rt = tokio::runtime::Runtime::new().unwrap();
+		let rt = tokio::runtime::Runtime::new().unwrap();
 		rt.block_on(async move {
-			let timeout = tokio::time::delay_for(Duration::from_millis(500));
+			let timeout = tokio::time::sleep(Duration::from_millis(500));
+			futures::pin_mut!(timeout);
 
 			match futures::future::select(rx, timeout).await {
 				futures::future::Either::Left((result, _)) => {

server-utils/Cargo.toml

@@ -11,14 +11,15 @@ repository = "https://github.com/paritytech/jsonrpc"
 version = "17.1.0"
 
 [dependencies]
-bytes = "0.5"
+bytes = "1.0"
 futures = "0.3"
 globset = "0.4"
 jsonrpc-core = { version = "17.1", path = "../core" }
 lazy_static = "1.1.0"
 log = "0.4"
-tokio = { version = "0.2", features = ["rt-threaded", "io-driver", "io-util", "time", "tcp"] }
-tokio-util = { version = "0.3", features = ["codec"] }
+tokio = { version = "1", features = ["rt-multi-thread", "io-util", "time", "net"] }
+tokio-util = { version = "0.6", features = ["codec"] }
+tokio-stream = { version = "0.1", features = ["net"] }
 
 unicase = "2.0"
 

server-utils/src/lib.rs

@@ -9,6 +9,7 @@ extern crate log;
 extern crate lazy_static;
 
 pub use tokio;
+pub use tokio_stream;
 pub use tokio_util;
 
 pub mod cors;

server-utils/src/reactor.rs

@@ -96,9 +96,8 @@ impl RpcEventLoop {
 	pub fn with_name(name: Option<String>) -> io::Result<Self> {
 		let (stop, stopped) = futures::channel::oneshot::channel();
 
-		let mut tb = runtime::Builder::new();
-		tb.core_threads(1);
-		tb.threaded_scheduler();
+		let mut tb = runtime::Builder::new_multi_thread();
+		tb.worker_threads(1);
 		tb.enable_all();
 
 		if let Some(name) = name {

server-utils/src/suspendable_stream.rs

@@ -2,9 +2,7 @@ use std::future::Future;
 use std::io;
 use std::pin::Pin;
 use std::task::Poll;
-use std::time::Duration;
-
-use tokio::time::Delay;
+use std::time::{Duration, Instant};
 
 /// `Incoming` is a stream of incoming sockets
 /// Polling the stream may return a temporary io::Error (for instance if we can't open the connection because of "too many open files" limit)
@@ -19,7 +17,7 @@ pub struct SuspendableStream<S> {
 	next_delay: Duration,
 	initial_delay: Duration,
 	max_delay: Duration,
-	timeout: Option<Delay>,
+	suspended_until: Option<Instant>,
 }
 
 impl<S> SuspendableStream<S> {
@@ -31,7 +29,7 @@ impl<S> SuspendableStream<S> {
 			next_delay: Duration::from_millis(20),
 			initial_delay: Duration::from_millis(10),
 			max_delay: Duration::from_secs(5),
-			timeout: None,
+			suspended_until: None,
 		}
 	}
 }
@@ -44,10 +42,17 @@ where
 
 	fn poll_next(mut self: Pin<&mut Self>, cx: &mut std::task::Context<'_>) -> std::task::Poll<Option<Self::Item>> {
 		loop {
-			if let Some(timeout) = self.timeout.as_mut() {
-				match Pin::new(timeout).poll(cx) {
+			// If we encountered a connection error before then we suspend
+			// polling from the underlying stream for a bit
+			if let Some(deadline) = &mut self.suspended_until {
+				let deadline = tokio::time::Instant::from_std(*deadline);
+				let sleep = tokio::time::sleep_until(deadline);
+				futures::pin_mut!(sleep);
+				match sleep.poll(cx) {
 					Poll::Pending => return Poll::Pending,
-					Poll::Ready(()) => {}
+					Poll::Ready(()) => {
+						self.suspended_until = None;
+					}
 				}
 			}
 
@@ -78,7 +83,7 @@ where
 					};
 					debug!("Error accepting connection: {}", err);
 					debug!("The server will stop accepting connections for {:?}", self.next_delay);
-					self.timeout = Some(tokio::time::delay_for(self.next_delay));
+					self.suspended_until = Some(Instant::now() + self.next_delay);
 				}
 			}
 		}

stdio/Cargo.toml

@@ -13,11 +13,11 @@ version = "17.1.0"
 futures = "0.3"
 jsonrpc-core = { version = "17.1", path = "../core" }
 log = "0.4"
-tokio = { version = "0.2", features = ["io-std", "io-driver", "io-util"] }
-tokio-util = { version = "0.3", features = ["codec"] }
+tokio = { version = "1", features = ["io-std", "io-util"] }
+tokio-util = { version = "0.6", features = ["codec"] }
 
 [dev-dependencies]
-tokio = { version = "0.2", features = ["rt-core", "macros"] }
+tokio = { version = "1", features = ["rt", "macros"] }
 lazy_static = "1.0"
 env_logger = "0.7"
 

tcp/src/server.rs

@@ -7,6 +7,7 @@ use tower_service::Service as _;
 
 use crate::futures::{self, future};
 use crate::jsonrpc::{middleware, MetaIoHandler, Metadata, Middleware};
+use crate::server_utils::tokio_stream::wrappers::TcpListenerStream;
 use crate::server_utils::{codecs, reactor, tokio, tokio_util::codec::Framed, SuspendableStream};
 
 use crate::dispatch::{Dispatcher, PeerMessageQueue, SenderChannels};
@@ -94,6 +95,7 @@ where
 		executor.executor().spawn(async move {
 			let start = async {
 				let listener = tokio::net::TcpListener::bind(&address).await?;
+				let listener = TcpListenerStream::new(listener);
 				let connections = SuspendableStream::new(listener);
 
 				let server = connections.map(|socket| {

tcp/src/tests.rs

@@ -1,4 +1,4 @@
-use std::net::{Shutdown, SocketAddr};
+use std::net::SocketAddr;
 use std::str::FromStr;
 use std::sync::Arc;
 use std::time::Duration;
@@ -23,7 +23,7 @@ fn casual_server() -> ServerBuilder {
 }
 
 fn run_future<O>(fut: impl std::future::Future<Output = O> + Send) -> O {
-	let mut rt = tokio::runtime::Runtime::new().unwrap();
+	let rt = tokio::runtime::Runtime::new().unwrap();
 	rt.block_on(fut)
 }
 
@@ -60,9 +60,9 @@ fn disconnect() {
 	let _server = server.start(&addr).expect("Server must run with no issues");
 
 	run_future(async move {
-		let stream = TcpStream::connect(&addr).await.unwrap();
+		let mut stream = TcpStream::connect(&addr).await.unwrap();
 		assert_eq!(stream.peer_addr().unwrap(), addr);
-		stream.shutdown(::std::net::Shutdown::Both).unwrap();
+		stream.shutdown().await.unwrap();
 	});
 
 	::std::thread::sleep(::std::time::Duration::from_millis(50));
@@ -76,7 +76,7 @@ fn dummy_request(addr: &SocketAddr, data: Vec<u8>) -> Vec<u8> {
 	let stream = async move {
 		let mut stream = TcpStream::connect(addr).await?;
 		stream.write_all(&data).await?;
-		stream.shutdown(Shutdown::Write)?;
+		stream.shutdown().await?;
 		let mut read_buf = vec![];
 		let _ = stream.read_to_end(&mut read_buf).await;
 
@@ -243,7 +243,7 @@ fn message() {
 
 	let client = async move {
 		let stream = TcpStream::connect(&addr);
-		let delay = tokio::time::delay_for(Duration::from_millis(500));
+		let delay = tokio::time::sleep(Duration::from_millis(500));
 		let (stream, _) = futures::join!(stream, delay);
 		let mut stream = stream?;
 
@@ -272,7 +272,7 @@ fn message() {
 		let data = b"{\"jsonrpc\": \"2.0\", \"method\": \"say_hello\", \"params\": [42, 23], \"id\": 1}\n";
 		stream.write_all(&data[..]).await?;
 
-		stream.shutdown(Shutdown::Write).unwrap();
+		stream.shutdown().await.unwrap();
 		let mut read_buf = vec![];
 		let _ = stream.read_to_end(&mut read_buf).await?;