scaproust 0.3.2

Nanomsg scalability protocols implementation in rust. Various messaging patterns over pluggable transports
Documentation 
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

// Copyright (c) 2015-2017 Contributors as noted in the AUTHORS file.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0>
// or the MIT license <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
// This file may not be copied, modified, or distributed except according to those terms.

extern crate log;
extern crate env_logger;
extern crate scaproust;

use std::io::*;
use std::time::*;
use std::thread;
use std::str::FromStr;

use scaproust::*;
fn create_session() -> Session {
    SessionBuilder::new().
        with("tcp", Tcp).
        build().expect("Failed to create session !")
}

fn usage(program: &str) -> ! {
    let _ = writeln!(stderr(), "Usage: {} <connect-to> <msg-size> <roundtrips>", program);
    std::process::exit(1)
}

fn main() {
    env_logger::init().unwrap();

    let os_args: Vec<_> = std::env::args().collect();
    let args: Vec<&str> = os_args.iter().map(|x| x.as_ref()).collect();
    let program = args[0];

    if args.len() != 4 {
        usage(program);
    }

    let url = &args[1];
    let msg_size = usize::from_str(args[2]).expect("Failed to parse msg-size");
    let roundtrips = usize::from_str(args[3]).expect("Failed to parse roundtrips");

    let mut session = create_session();
    let mut socket = session.create_socket::<Pair>().expect("Failed to create socket !");

    socket.set_tcp_nodelay(true).expect("Failed to set tcp nodelay !");
    socket.connect(url).expect("Failed to connect socket !");

    thread::sleep(Duration::from_millis(250));

    let buffer = vec![6; msg_size];
    let mut msg = Message::from_body(buffer);
    let start = Instant::now();
    for _ in 0..roundtrips {
        socket.send_msg(msg).unwrap();
        msg = socket.recv_msg().unwrap();
    }
    let elapsed  = start.elapsed();
    let seconds = elapsed.as_secs() as f64;
    let nanos = elapsed.subsec_nanos() as f64;
    let elapsed_micros = (seconds * 1_000_000f64) + nanos / 1_000f64;
    let latency = elapsed_micros / (roundtrips * 2) as f64;

    println!("message size: {} [B]", msg_size);
    println!("roundtrip count: {}", roundtrips);
    println!("average latency: {:0.3} [us]", latency);
}