Tokio 0.3 Upgrade (#2319)

Co-authored-by: Urhengulas <johann.hemmann@code.berlin>
Co-authored-by: Eliza Weisman <eliza@buoyant.io>

.github/workflows/CI.yml

@@ -39,7 +39,7 @@ jobs:
           - stable
           - beta
           - nightly
-          - 1.39.0
+          - 1.45.2
 
         os:
           - ubuntu-latest

Cargo.toml

@@ -1,3 +1,4 @@
+
 [package]
 name = "hyper"
 version = "0.14.0-dev" # don't forget to update html_root_url
@@ -30,12 +31,12 @@ http = "0.2"
 http-body = "0.3.1"
 httpdate = "0.3"
 httparse = "1.0"
-h2 = "0.2.2"
+h2 = { git = "https://github.com/hyperium/h2" }
 itoa = "0.4.1"
 tracing = { version = "0.1", default-features = false, features = ["log", "std"] }
 pin-project = "1.0"
 tower-service = "0.3"
-tokio = { version = "0.2.11", features = ["sync"] }
+tokio = { version = "0.3", features = ["sync", "stream"] }
 want = "0.3"
 
 # Optional
@@ -51,9 +52,18 @@ spmc = "0.3"
 serde = "1.0"
 serde_derive = "1.0"
 serde_json = "1.0"
-tokio = { version = "0.2.2", features = ["fs", "macros", "io-std", "rt-util", "sync", "time", "test-util"] }
-tokio-test = "0.2"
-tokio-util = { version = "0.3", features = ["codec"] }
+tokio = { version = "0.3", features = [
+    "fs",
+    "macros",
+    "io-std",
+    "rt",
+    "rt-multi-thread", # so examples can use #[tokio::main]
+    "sync",
+    "time",
+    "test-util",
+] }
+tokio-test = "0.3"
+tokio-util = { version = "0.4", features = ["codec"] }
 tower-util = "0.3"
 url = "1.0"
 
@@ -67,12 +77,12 @@ default = [
 ]
 runtime = [
     "tcp",
-    "tokio/rt-core",
+    "tokio/rt",
 ]
 tcp = [
     "socket2",
-    "tokio/blocking",
-    "tokio/tcp",
+    "tokio/net",
+    "tokio/rt",
     "tokio/time",
 ]
 
@@ -219,4 +229,3 @@ required-features = ["runtime", "stream"]
 name = "server"
 path = "tests/server.rs"
 required-features = ["runtime"]
-

benches/body.rs

@@ -10,8 +10,7 @@ use hyper::body::Body;
 
 macro_rules! bench_stream {
     ($bencher:ident, bytes: $bytes:expr, count: $count:expr, $total_ident:ident, $body_pat:pat, $block:expr) => {{
-        let mut rt = tokio::runtime::Builder::new()
-            .basic_scheduler()
+        let rt = tokio::runtime::Builder::new_current_thread()
             .build()
             .expect("rt build");
 

benches/connect.rs

@@ -12,12 +12,11 @@ use tokio::net::TcpListener;
 #[bench]
 fn http_connector(b: &mut test::Bencher) {
     let _ = pretty_env_logger::try_init();
-    let mut rt = tokio::runtime::Builder::new()
+    let rt = tokio::runtime::Builder::new_current_thread()
         .enable_all()
-        .basic_scheduler()
         .build()
         .expect("rt build");
-    let mut listener = rt
+    let listener = rt
         .block_on(TcpListener::bind(&SocketAddr::from(([127, 0, 0, 1], 0))))
         .expect("bind");
     let addr = listener.local_addr().expect("local_addr");

benches/end_to_end.rs

@@ -270,14 +270,16 @@ impl Opts {
     }
 
     fn bench(self, b: &mut test::Bencher) {
+        use std::sync::Arc;
         let _ = pretty_env_logger::try_init();
         // Create a runtime of current thread.
-        let mut rt = tokio::runtime::Builder::new()
-            .enable_all()
-            .basic_scheduler()
-            .build()
-            .expect("rt build");
-        let exec = rt.handle().clone();
+        let rt = Arc::new(
+            tokio::runtime::Builder::new_current_thread()
+                .enable_all()
+                .build()
+                .expect("rt build"),
+        );
+        let exec = rt.clone();
 
         let req_len = self.request_body.map(|b| b.len()).unwrap_or(0) as u64;
         let req_len = if self.request_chunks > 0 {
@@ -288,7 +290,7 @@ impl Opts {
         let bytes_per_iter = (req_len + self.response_body.len() as u64) * self.parallel_cnt as u64;
         b.bytes = bytes_per_iter;
 
-        let addr = spawn_server(&mut rt, &self);
+        let addr = spawn_server(&rt, &self);
 
         let connector = HttpConnector::new();
         let client = hyper::Client::builder()
@@ -351,7 +353,7 @@ impl Opts {
     }
 }
 
-fn spawn_server(rt: &mut tokio::runtime::Runtime, opts: &Opts) -> SocketAddr {
+fn spawn_server(rt: &tokio::runtime::Runtime, opts: &Opts) -> SocketAddr {
     use hyper::service::{make_service_fn, service_fn};
     let addr = "127.0.0.1:0".parse().unwrap();
 

benches/pipeline.rs

@@ -31,9 +31,8 @@ fn hello_world(b: &mut test::Bencher) {
                 }))
             });
 
-            let mut rt = tokio::runtime::Builder::new()
+            let rt = tokio::runtime::Builder::new_current_thread()
                 .enable_all()
-                .basic_scheduler()
                 .build()
                 .expect("rt build");
             let srv = rt.block_on(async move {

benches/server.rs

@@ -34,9 +34,8 @@ macro_rules! bench_server {
                     }))
                 });
 
-                let mut rt = tokio::runtime::Builder::new()
+                let rt = tokio::runtime::Builder::new_current_thread()
                     .enable_all()
-                    .basic_scheduler()
                     .build()
                     .expect("rt build");
 
@@ -185,6 +184,7 @@ fn raw_tcp_throughput_large_payload(b: &mut test::Bencher) {
         let mut buf = [0u8; 8192];
         while rx.try_recv().is_err() {
             let r = sock.read(&mut buf).unwrap();
+            extern crate test;
             if r == 0 {
                 break;
             }

examples/single_threaded.rs

@@ -10,15 +10,14 @@ fn main() {
     pretty_env_logger::init();
 
     // Configure a runtime that runs everything on the current thread
-    let mut rt = tokio::runtime::Builder::new()
+    let rt = tokio::runtime::Builder::new_current_thread()
         .enable_all()
-        .basic_scheduler()
         .build()
         .expect("build runtime");
 
     // Combine it with a `LocalSet,  which means it can spawn !Send futures...
     let local = tokio::task::LocalSet::new();
-    local.block_on(&mut rt, run());
+    local.block_on(&rt, run());
 }
 
 async fn run() {