129 lines
2.8 KiB
Rust
129 lines
2.8 KiB
Rust
use std::net::SocketAddr;
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use std::sync::Arc;
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use std::time::Duration;
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use bytes::IntoBuf;
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use futures::stream::futures_unordered::FuturesUnordered;
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use futures::stream::StreamExt;
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use futures_util::future::FutureExt;
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use hyper::client::Client;
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use hyper::{Body, Method, Request, StatusCode};
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use crate::data::*;
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use crate::error::Error;
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use crate::membership::System;
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use crate::proto::Message;
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pub async fn rpc_call_many(
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sys: Arc<System>,
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to: &[UUID],
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msg: &Message,
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timeout: Duration,
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) -> Vec<Result<Message, Error>> {
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let mut resp_stream = to
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.iter()
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.map(|to| rpc_call(sys.clone(), to, msg, timeout))
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.collect::<FuturesUnordered<_>>();
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let mut results = vec![];
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while let Some(resp) = resp_stream.next().await {
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results.push(resp);
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}
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results
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}
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pub async fn rpc_try_call_many(
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sys: Arc<System>,
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to: &[UUID],
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msg: &Message,
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stop_after: usize,
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timeout: Duration,
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) -> Result<Vec<Message>, Error> {
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let mut resp_stream = to
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.iter()
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.map(|to| rpc_call(sys.clone(), to, msg, timeout))
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.collect::<FuturesUnordered<_>>();
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let mut results = vec![];
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let mut errors = vec![];
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while let Some(resp) = resp_stream.next().await {
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match resp {
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Ok(msg) => {
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results.push(msg);
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if results.len() >= stop_after {
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break;
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}
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}
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Err(e) => {
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errors.push(e);
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}
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}
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}
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if results.len() >= stop_after {
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Ok(results)
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} else {
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let mut msg = "Too many failures:".to_string();
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for e in errors {
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msg += &format!("\n{}", e);
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}
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Err(Error::Message(msg))
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}
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}
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pub async fn rpc_call(
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sys: Arc<System>,
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to: &UUID,
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msg: &Message,
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timeout: Duration,
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) -> Result<Message, Error> {
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let addr = {
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let members = sys.members.read().await;
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match members.status.get(to) {
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Some(status) => status.addr.clone(),
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None => return Err(Error::Message(format!("Peer ID not found"))),
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}
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};
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sys.rpc_client.call(&addr, msg, timeout).await
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}
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pub struct RpcClient {
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pub client: Client<hyper::client::HttpConnector, hyper::Body>,
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}
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impl RpcClient {
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pub fn new() -> Self {
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RpcClient {
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client: Client::new(),
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}
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}
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pub async fn call(
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&self,
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to_addr: &SocketAddr,
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msg: &Message,
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timeout: Duration,
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) -> Result<Message, Error> {
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let uri = format!("http://{}/rpc", to_addr);
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let req = Request::builder()
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.method(Method::POST)
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.uri(uri)
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.body(Body::from(rmp_to_vec_all_named(msg)?))?;
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let resp_fut = self.client.request(req).fuse();
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let resp = tokio::time::timeout(timeout, resp_fut).await??;
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if resp.status() == StatusCode::OK {
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let body = hyper::body::to_bytes(resp.into_body()).await?;
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let msg = rmp_serde::decode::from_read::<_, Message>(body.into_buf())?;
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match msg {
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Message::Error(e) => Err(Error::RPCError(e)),
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x => Ok(x),
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}
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} else {
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Err(Error::RPCError(format!("Status code {}", resp.status())))
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}
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}
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}
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