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This commit is contained in:
Nikita Vilunov 2023-01-19 15:25:52 +01:00
commit 1950453cae
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.gitignore vendored Normal file
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/target

552
Cargo.lock generated Normal file
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Cargo.toml Normal file
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[package]
name = "lavina"
version = "0.1.0"
edition = "2021"
default-run = "server"
[[bin]]
name = "client"
path = "src/client.rs"
[[bin]]
name = "server"
path = "src/main.rs"
[dependencies]
anyhow = "1.0.68" # error utils
figment = { version = "0.10.8", features = ["env", "toml"] } # configuration files
serde = { version = "1.0.152", features = ["rc", "serde_derive"] }
tokio = { version = "1.24.1", features = ["full"] } # async runtime
tracing = "0.1.37" # logging & tracing api
tracing-subscriber = "0.3.16"

5
config.toml Normal file
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[cluster]
name = "localhost"
servers = ["127.0.0.1:3333"]

3
src/client.rs Normal file
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fn main() {
println!("Hello, world!");
}

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src/main.rs Normal file
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type Result<T> = std::result::Result<T, anyhow::Error>;
use std::collections::HashMap;
use std::future::Future;
use std::net::SocketAddr;
use std::time::Duration;
use figment::providers::Format;
use tokio::net::{TcpListener, TcpStream};
use figment::{providers::Toml, Figment};
use serde::Deserialize;
use tokio::io::{AsyncWriteExt, BufWriter};
use tokio::sync::mpsc::{Receiver, Sender};
use tokio::task::JoinHandle;
#[derive(Deserialize, Debug)]
struct ServerConfig {
cluster: ClusterConfig,
}
#[derive(Deserialize, Debug)]
struct ClusterConfig {
name: String,
servers: Vec<SocketAddr>,
}
fn load_config() -> Result<ServerConfig> {
let raw_config = Figment::new().merge(Toml::file("config.toml"));
let config: ServerConfig = raw_config.extract()?;
Ok(config)
}
#[tokio::main]
async fn main() -> Result<()> {
set_up_logging()?;
let sleep = ctrl_c()?;
let config = load_config()?;
dbg!(config);
tracing::info!("Booting up");
let listener = TcpListener::bind("127.0.0.1:3721").await?;
tracing::info!("Started");
run(listener, sleep).await?;
// sleep.await;
tracing::info!("Begin shutdown");
tracing::info!("Shutdown complete");
Ok(())
}
fn ctrl_c() -> Result<impl Future<Output = ()>> {
use tokio::signal::unix::*;
let chan = signal(SignalKind::interrupt())?;
async fn recv(mut chan: Signal) {
let _ = chan.recv().await;
}
Ok(recv(chan))
}
fn set_up_logging() -> Result<()> {
tracing_subscriber::fmt::init();
Ok(())
}
async fn run(listener: TcpListener, shutdown: impl Future<Output = ()>) -> Result<()> {
tokio::pin!(shutdown);
let mut counter: u32 = 0;
let mut conns: HashMap<u32, _> = HashMap::new();
let (sender, mut chan) = tokio::sync::mpsc::channel(32);
loop {
let accept = listener.accept();
tokio::select! {
id = chan.recv() => {
match id {
Some(id) => {
conns.remove(&id);
}
None => {}
}
},
result = accept => {
let (connect, address) = result?;
let id = counter;
counter += 1;
let fiber = handle_connection(connect, address, id, sender.clone()).await?;
conns.insert(id, fiber);
},
_ = &mut shutdown => break,
}
}
for (_, i) in conns {
dbg!(i.terminate().await?);
}
Ok(())
}
async fn handle_connection(
connect: TcpStream,
address: SocketAddr,
id: u32,
updater: Sender<u32>,
) -> Result<ClientSocketActor> {
tracing::info!("Incoming socket #{} from {}", id, address);
let writer = BufWriter::new(connect);
Ok(ClientSocketActor::launch(writer, updater, id)?)
}
struct ClientSocketActor {
sender: Sender<ClientSocketActorMessage>,
fiber: JoinHandle<Result<ClientSocketActorTermination>>,
}
#[derive(Debug, Clone)]
enum ClientSocketActorMessage {
Terminate,
}
#[derive(Debug, Clone)]
enum ClientSocketActorTermination {
ServerClosed,
}
impl ClientSocketActor {
pub async fn terminate(self) -> Result<ClientSocketActorTermination> {
self.sender
.send(ClientSocketActorMessage::Terminate)
.await?;
Ok(self.fiber.await??)
}
pub fn launch(
writer: BufWriter<TcpStream>,
updater: Sender<u32>,
id: u32,
) -> Result<ClientSocketActor> {
let (sender, chan) = tokio::sync::mpsc::channel(32);
let fiber: JoinHandle<Result<ClientSocketActorTermination>> =
tokio::spawn(ClientSocketActor::handle_connect(writer, chan, updater, id));
Ok(ClientSocketActor { sender, fiber })
}
async fn handle_connect(
mut writer: BufWriter<TcpStream>,
mut messagebox: Receiver<ClientSocketActorMessage>,
updater: Sender<u32>,
id: u32,
) -> Result<ClientSocketActorTermination> {
async fn handle(
messagebox: &mut Receiver<ClientSocketActorMessage>,
writer: &mut BufWriter<TcpStream>,
) -> Result<Option<ClientSocketActorTermination>> {
writer.write_all("privet\n".as_bytes()).await?;
writer.flush().await?;
tracing::info!("Wrote");
tokio::select! {
_ = messagebox.recv() => return Ok(Some(ClientSocketActorTermination::ServerClosed)),
_ = tokio::time::sleep(Duration::from_millis(200)) => (),
}
Ok(None)
}
loop {
match handle(&mut messagebox, &mut writer).await {
Ok(None) => {}
Ok(Some(termination)) => return Ok(termination),
Err(err) => {
tracing::error!("{}", err);
updater.send(id).await?;
return Err(err);
}
}
}
}
}