mirror of
https://github.com/balkian/experiments.git
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Another prototype of maelstrom server with Tokio
This commit is contained in:
J. Fernando Sánchez
598
rust/tokioserde/Cargo.lock
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Normal file
598
rust/tokioserde/Cargo.lock
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|
||||
checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tokioserde"
|
||||
version = "0.1.0"
|
||||
dependencies = [
|
||||
"anyhow",
|
||||
"serde",
|
||||
"serde_json",
|
||||
"tokio",
|
||||
"tracing",
|
||||
"tracing-subscriber",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing"
|
||||
version = "0.1.41"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "784e0ac535deb450455cbfa28a6f0df145ea1bb7ae51b821cf5e7927fdcfbdd0"
|
||||
dependencies = [
|
||||
"pin-project-lite",
|
||||
"tracing-attributes",
|
||||
"tracing-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-attributes"
|
||||
version = "0.1.28"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "395ae124c09f9e6918a2310af6038fba074bcf474ac352496d5910dd59a2226d"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-core"
|
||||
version = "0.1.33"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e672c95779cf947c5311f83787af4fa8fffd12fb27e4993211a84bdfd9610f9c"
|
||||
dependencies = [
|
||||
"once_cell",
|
||||
"valuable",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-log"
|
||||
version = "0.2.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ee855f1f400bd0e5c02d150ae5de3840039a3f54b025156404e34c23c03f47c3"
|
||||
dependencies = [
|
||||
"log",
|
||||
"once_cell",
|
||||
"tracing-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "tracing-subscriber"
|
||||
version = "0.3.19"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "e8189decb5ac0fa7bc8b96b7cb9b2701d60d48805aca84a238004d665fcc4008"
|
||||
dependencies = [
|
||||
"matchers",
|
||||
"nu-ansi-term",
|
||||
"once_cell",
|
||||
"regex",
|
||||
"sharded-slab",
|
||||
"smallvec",
|
||||
"thread_local",
|
||||
"tracing",
|
||||
"tracing-core",
|
||||
"tracing-log",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "unicode-ident"
|
||||
version = "1.0.14"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "adb9e6ca4f869e1180728b7950e35922a7fc6397f7b641499e8f3ef06e50dc83"
|
||||
|
||||
[[package]]
|
||||
name = "valuable"
|
||||
version = "0.1.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ba73ea9cf16a25df0c8caa16c51acb937d5712a8429db78a3ee29d5dcacd3a65"
|
||||
|
||||
[[package]]
|
||||
name = "wasi"
|
||||
version = "0.11.0+wasi-snapshot-preview1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||
|
||||
[[package]]
|
||||
name = "winapi"
|
||||
version = "0.3.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||
dependencies = [
|
||||
"winapi-i686-pc-windows-gnu",
|
||||
"winapi-x86_64-pc-windows-gnu",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "winapi-i686-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.52.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
|
||||
dependencies = [
|
||||
"windows-targets",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows-targets"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
|
||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_gnullvm",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
12
rust/tokioserde/Cargo.toml
Normal file
12
rust/tokioserde/Cargo.toml
Normal file
@@ -0,0 +1,12 @@
|
||||
[package]
|
||||
name = "tokioserde"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.95"
|
||||
serde = { version = "1.0.217", features = ["derive"] }
|
||||
serde_json = "1.0.137"
|
||||
tokio = { version = "1.43.0", features = ["full"] }
|
||||
tracing = { version = "0.1.41", features = ["attributes"] }
|
||||
tracing-subscriber = { version = "0.3.19", features = ["env-filter"] }
|
||||
204
rust/tokioserde/src/main.rs
Normal file
204
rust/tokioserde/src/main.rs
Normal file
@@ -0,0 +1,204 @@
|
||||
/// A prototype design for the implementation of Maelstrom services.
|
||||
/// It consists of the following main elements:
|
||||
/// * Msg<P> - For messages with generic payload P
|
||||
/// * Transport Trait - A transport that can send and receive Msg<P>. The basic implementation is
|
||||
/// NewlineTransport.
|
||||
/// * MsgSender Trait - capable of sending Msg<P>. Transport should generate new senders through
|
||||
/// `clone_sender`.
|
||||
///
|
||||
use tokio::{
|
||||
time::{sleep, Duration},
|
||||
task::JoinHandle,
|
||||
sync::{oneshot, mpsc::{channel, Sender}}
|
||||
};
|
||||
use serde::{Serialize,Deserialize, de::DeserializeOwned};
|
||||
use serde_json::Value;
|
||||
use std::fmt::Debug;
|
||||
use tokio::io::{self, AsyncRead, BufReader, AsyncWrite, AsyncWriteExt, AsyncBufReadExt, Lines, BufWriter};
|
||||
use anyhow::{bail, Context, Result};
|
||||
use std::future::Future;
|
||||
use std::pin::{pin};
|
||||
use tracing::{instrument, info, debug, warn};
|
||||
use tracing_subscriber::{filter::EnvFilter};
|
||||
|
||||
|
||||
#[derive(Debug,Deserialize,Serialize)]
|
||||
struct Message {
|
||||
body: String,
|
||||
}
|
||||
|
||||
#[derive(Debug, Deserialize, Serialize)]
|
||||
struct Msg<P> {
|
||||
src: u64,
|
||||
dest: u64,
|
||||
body: Body<P>,
|
||||
}
|
||||
|
||||
#[derive(Debug, Deserialize, Serialize)]
|
||||
struct Body<P>{
|
||||
msg_id: Option<u64>,
|
||||
in_reply_to: Option<u64>,
|
||||
#[serde(flatten)]
|
||||
payload: P
|
||||
}
|
||||
|
||||
impl<P> Msg<P>
|
||||
where P: Serialize
|
||||
{
|
||||
fn to_generic(&self) -> Result<Msg<Value>> {
|
||||
Ok(Msg {
|
||||
src: self.src.clone(),
|
||||
dest: self.dest.clone(),
|
||||
body: Body {
|
||||
msg_id: self.body.msg_id.clone(),
|
||||
in_reply_to: self.body.in_reply_to.clone(),
|
||||
payload: serde_json::to_value(&self.body.payload)?
|
||||
}
|
||||
})
|
||||
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
struct NewlineTransport<R> {
|
||||
input: Lines<BufReader<R>>,
|
||||
jh: JoinHandle<Result<()>>,
|
||||
output: AckSender,
|
||||
}
|
||||
|
||||
impl NewlineTransport<io::Stdin>
|
||||
{
|
||||
fn new() -> Self {
|
||||
Self::from_rw(io::stdin(), io::stdout())
|
||||
}
|
||||
}
|
||||
|
||||
type AckSender = Sender<(Msg<Value>, oneshot::Sender<Result<usize>>)>;
|
||||
|
||||
impl<R> NewlineTransport<R>
|
||||
where
|
||||
R: AsyncRead + Unpin,
|
||||
{
|
||||
fn from_rw<W: AsyncWrite + Send + 'static>(r: R, w: W) -> Self {
|
||||
let buf = io::BufReader::new(r);
|
||||
let (output, mut rx) = channel::<(Msg<Value>, oneshot::Sender<Result<usize>>)>(1);
|
||||
let jh = tokio::spawn(async move {
|
||||
let mut out = pin!(BufWriter::new(w));
|
||||
let mut msg_id = 0; // This msg_id could be added to the Transport with an Arc or
|
||||
// similar.
|
||||
while let Some((mut gen, back)) = rx.recv().await {
|
||||
gen.body.msg_id = Some(msg_id);
|
||||
msg_id += 1;
|
||||
let s = serde_json::to_string(&gen).context("failed to serialize message")?;
|
||||
let res = out.write(s.as_bytes()).await.context("failed to write");
|
||||
out.flush().await?;
|
||||
if let Err(res) = back.send(res) {
|
||||
bail!("failed to send result of sending: {res:?}");
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
});
|
||||
Self {
|
||||
input: buf.lines(),
|
||||
jh,
|
||||
output,
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
trait Transport {
|
||||
fn clone_sender(&self) -> impl MsgSender + 'static;
|
||||
|
||||
fn close(self) -> impl Future<Output=Result<()>>;
|
||||
|
||||
fn recv<P: Debug + DeserializeOwned>(&mut self) -> impl Future<Output=Result<Option<Msg<P>>>>;
|
||||
}
|
||||
|
||||
impl<R> Transport for NewlineTransport<R>
|
||||
where
|
||||
R: AsyncRead + Unpin,
|
||||
{
|
||||
fn clone_sender(&self) -> impl MsgSender + 'static {
|
||||
self.output.clone()
|
||||
}
|
||||
|
||||
async fn close(self) -> Result<()>{
|
||||
drop(self.output);
|
||||
self.jh.await?
|
||||
}
|
||||
|
||||
#[instrument(skip(self),ret)]
|
||||
async fn recv<P: Debug + DeserializeOwned>(&mut self) -> Result<Option<Msg<P>>> {
|
||||
let Some(line) = self.input.next_line().await? else {
|
||||
return Ok(None);
|
||||
};
|
||||
Ok(Some(serde_json::from_str::<Msg<P>>(&line)?))
|
||||
}
|
||||
}
|
||||
|
||||
trait MsgSender: Send {
|
||||
fn send_msg<P: Serialize + Debug + Sync>(&mut self, m: &Msg<P>) -> impl Future<Output=Result<usize>> + Send;
|
||||
}
|
||||
|
||||
|
||||
impl MsgSender for AckSender {
|
||||
#[instrument(skip(self),ret)]
|
||||
async fn send_msg<P: Serialize + Debug + Sync>(&mut self, m: &Msg<P>) -> Result<usize> {
|
||||
let (tx, rx) = oneshot::channel();
|
||||
let generic = m.to_generic()?;
|
||||
Sender::send(self, (generic, tx)).await.context("could not send message to sender")?;
|
||||
rx.await.context("could not send ack")?
|
||||
}
|
||||
}
|
||||
|
||||
trait Service {
|
||||
type P: Debug + DeserializeOwned + Serialize;
|
||||
fn process(&mut self, m: Msg<Self::P>, s: impl MsgSender + 'static) -> impl Future<Output=Result<()>>;
|
||||
fn serve<T: Transport>(mut self, mut t: T) -> impl Future<Output=Result<()>>
|
||||
where Self: Sized{
|
||||
async move {
|
||||
while let Some(m) = t.recv::<Self::P>().await? {
|
||||
let mut s = t.clone_sender();
|
||||
self.process(m, s).await?;
|
||||
}
|
||||
info!("Closing transport");
|
||||
t.close().await.expect("should not panic");
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
}
|
||||
struct EchoService {}
|
||||
|
||||
#[derive(Debug,Deserialize,Serialize)]
|
||||
#[serde(tag = "type")]
|
||||
#[serde(rename_all = "snake_case")]
|
||||
enum EchoPayload {
|
||||
Echo {
|
||||
echo: String
|
||||
},
|
||||
}
|
||||
|
||||
impl Service for EchoService {
|
||||
type P = EchoPayload;
|
||||
async fn process(&mut self, m: Msg<Self::P>, mut s: impl MsgSender + 'static) -> Result<()> {
|
||||
tracing::info!("Received: {m:?}");
|
||||
tokio::spawn(async move {
|
||||
sleep(Duration::from_millis(5000)).await;
|
||||
s.send_msg(&Msg{src: 1, dest: 1, body: { Body { msg_id: Some(1), in_reply_to: None, payload: EchoPayload::Echo{ echo: String::from("Hello") }}}}).await.expect("sending failed");
|
||||
});
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() -> Result<()>{
|
||||
tracing_subscriber::fmt()
|
||||
.with_env_filter(EnvFilter::from_default_env())
|
||||
.with_writer(std::io::stderr)
|
||||
.init();
|
||||
let mut t = NewlineTransport::new();
|
||||
let s = EchoService{};
|
||||
s.serve(t).await
|
||||
}
|
||||
Reference in New Issue
Block a user