1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
use std::net::SocketAddr;
use std::sync::Arc;
use std::time::Duration;
use bytes::IntoBuf;
use hyper::{Body, Method, Request, StatusCode};
use hyper::client::Client;
use futures::stream::futures_unordered::FuturesUnordered;
use futures::stream::StreamExt;
use crate::data::*;
use crate::error::Error;
use crate::proto::Message;
use crate::membership::System;
pub async fn rpc_call_many(sys: Arc<System>,
to: &[UUID],
msg: &Message,
timeout: Duration)
-> Vec<Result<Message, Error>>
{
let mut resp_stream = to.iter()
.map(|to| rpc_call(sys.clone(), to, msg, timeout))
.collect::<FuturesUnordered<_>>();
let mut results = vec![];
while let Some(resp) = resp_stream.next().await {
results.push(resp);
}
results
}
pub async fn rpc_try_call_many(sys: Arc<System>,
to: &[UUID],
msg: &Message,
stop_after: usize,
timeout: Duration)
-> Result<Vec<Message>, Error>
{
let mut resp_stream = to.iter()
.map(|to| rpc_call(sys.clone(), to, msg, timeout))
.collect::<FuturesUnordered<_>>();
let mut results = vec![];
let mut errors = vec![];
while let Some(resp) = resp_stream.next().await {
match resp {
Ok(msg) => {
results.push(msg);
if results.len() >= stop_after {
break
}
}
Err(e) => {
errors.push(e);
}
}
}
if results.len() >= stop_after {
Ok(results)
} else {
let mut msg = "Too many failures:".to_string();
for e in errors {
msg += &format!("\n{}", e);
}
Err(Error::Message(msg))
}
}
pub async fn rpc_call(sys: Arc<System>,
to: &UUID,
msg: &Message,
timeout: Duration)
-> Result<Message, Error>
{
let addr = {
let members = sys.members.read().await;
match members.status.get(to) {
Some(status) => status.addr.clone(),
None => return Err(Error::Message(format!("Peer ID not found"))),
}
};
sys.rpc_client.call(&addr, msg, timeout).await
}
pub struct RpcClient {
pub client: Client<hyper::client::HttpConnector, hyper::Body>,
}
impl RpcClient {
pub fn new() -> Self {
RpcClient{
client: Client::new(),
}
}
pub async fn call(&self,
to_addr: &SocketAddr,
msg: &Message,
timeout: Duration)
-> Result<Message, Error>
{
let uri = format!("http://{}/", to_addr);
let req = Request::builder()
.method(Method::POST)
.uri(uri)
.body(Body::from(rmp_to_vec_all_named(msg)?))?;
let resp_fut = self.client.request(req);
let resp = tokio::time::timeout(timeout, resp_fut).await??;
if resp.status() == StatusCode::OK {
let body = hyper::body::to_bytes(resp.into_body()).await?;
let msg = rmp_serde::decode::from_read::<_, Message>(body.into_buf())?;
match msg {
Message::Error(e) => Err(Error::RPCError(e)),
x => Ok(x)
}
} else {
Err(Error::RPCError(format!("Status code {}", resp.status())))
}
}
}
|
