From 8748ba7e5bbe10987b758e0eb818593cd468508c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jan=20Christian=20Gr=C3=BCnhage?= Date: Tue, 5 Feb 2019 01:20:32 +0100 Subject: [PATCH] refactoring the futures to be more readable --- Cargo.lock | 144 ++++++++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 1 + src/main.rs | 51 +++++++++++-------- 3 files changed, 175 insertions(+), 21 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index 6925393..c42bcb3 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -1,3 +1,11 @@ +[[package]] +name = "aho-corasick" +version = "0.6.9" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "memchr 2.1.3 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "arrayvec" version = "0.4.10" @@ -6,6 +14,16 @@ dependencies = [ "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "atty" +version = "0.2.11" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "libc 0.2.48 (registry+https://github.com/rust-lang/crates.io-index)", + "termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)", + "winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "autocfg" version = "0.1.2" @@ -98,6 +116,18 @@ dependencies = [ "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "env_logger" +version = "0.6.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)", + "humantime 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)", + "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)", + "regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)", + "termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "fnv" version = "1.0.6" @@ -173,6 +203,14 @@ name = "httparse" version = "1.3.3" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "humantime" +version = "1.2.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "hyper" version = "0.12.23" @@ -259,6 +297,15 @@ dependencies = [ "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)", ] +[[package]] +name = "memchr" +version = "2.1.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)", + "libc 0.2.48 (registry+https://github.com/rust-lang/crates.io-index)", +] + [[package]] name = "memoffset" version = "0.2.1" @@ -368,6 +415,7 @@ dependencies = [ name = "peshming" version = "0.1.0" dependencies = [ + "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)", "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)", "hyper 0.12.23 (registry+https://github.com/rust-lang/crates.io-index)", "lazy_static 1.2.0 (registry+https://github.com/rust-lang/crates.io-index)", @@ -526,6 +574,34 @@ name = "redox_syscall" version = "0.1.51" source = "registry+https://github.com/rust-lang/crates.io-index" +[[package]] +name = "redox_termios" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)", +] + +[[package]] +name = "regex" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +dependencies = [ + "aho-corasick 0.6.9 (registry+https://github.com/rust-lang/crates.io-index)", + "memchr 2.1.3 (registry+https://github.com/rust-lang/crates.io-index)", + "regex-syntax 0.6.5 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"checksum mio 0.6.16 (registry+https://github.com/rust-lang/crates.io-index)" = "71646331f2619b1026cc302f87a2b8b648d5c6dd6937846a16cc8ce0f347f432" "checksum mio-uds 0.6.7 (registry+https://github.com/rust-lang/crates.io-index)" = "966257a94e196b11bb43aca423754d87429960a768de9414f3691d6957abf125" @@ -923,6 +1057,9 @@ dependencies = [ "checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c" "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2" "checksum redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)" = "423e376fffca3dfa06c9e9790a9ccd282fafb3cc6e6397d01dbf64f9bacc6b85" +"checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76" +"checksum regex 1.1.0 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a/Cargo.toml +++ b/Cargo.toml @@ -13,3 +13,4 @@ hyper = "0.12.23" lazy_static = "1.2.0" futures = "0.1.25" tokio = "0.1.15" +env_logger = "0.6.0" diff --git a/src/main.rs b/src/main.rs index 88b511a..c3e51eb 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,20 +1,25 @@ -#[macro_use] extern crate serde_derive; extern crate toml; extern crate hyper; -#[macro_use] extern crate lazy_static; -#[macro_use] extern crate prometheus; extern crate futures; +extern crate tokio; +extern crate env_logger; use hyper::header::CONTENT_TYPE; use hyper::{Body, Request, Response, Server}; use hyper::rt::Future; use hyper::service::service_fn_ok; +use lazy_static::lazy_static; + use prometheus::{Counter, Encoder, Gauge, HistogramVec, TextEncoder}; +use prometheus::*; + +use futures::future::lazy; +//TODO: Replace with useful metrics, these are beyond useless lazy_static! { static ref HTTP_COUNTER: Counter = register_counter!(opts!( "example_http_requests_total", @@ -36,16 +41,11 @@ lazy_static! { .unwrap(); } -fn main() { - //TODO: Add service that does the pinging, based on oping and the example over at https://tokio.rs/docs/futures/spawning/ - //TODO: Clean this shameful mess up! - //TODO: Ivestigate why all samples end up in all histogram buckets. - //TODO: Do config reading etc +fn start_serving_metrics() { let serve_metrics = || { service_fn_ok(|_req| { HTTP_COUNTER.inc(); let timer = HTTP_REQ_HISTOGRAM.with_label_values(&["all"]).start_timer(); - let metric_families = prometheus::gather(); let mut buffer = vec![]; let encoder = TextEncoder::new(); @@ -58,19 +58,28 @@ fn main() { }) }; println!("listening addr 127.0.0.1:9898"); - let server = Server::bind(&([127, 0, 0, 1], 9898).into()).serve(serve_metrics); - - // Prepare some signal for when the server should start - // shutting down... - let (tx, rx) = futures::sync::oneshot::channel::<()>(); + let server = Server::bind(&([127, 0, 0, 1], 9898).into()) + .serve(serve_metrics) + .map_err(|err| eprintln!("server error: {}", err)); + tokio::spawn(server); +} - let graceful = server.with_graceful_shutdown(rx).map_err(|err| { - eprintln!("server error: {}", err) - }); +fn start_pinging_hosts() { + tokio::spawn(lazy(|| { + //TODO: Implement the pinging, based on oping and the example over at + // https://tokio.rs/docs/futures/spawning/ + Ok(()) + })); +} + //TODO: Clean this shameful mess up! + //TODO: Do config reading, cli args, logging etc - // Spawn `server` onto an Executor... - hyper::rt::run(graceful); - // And later, trigger the signal by calling `tx.send(())`. - let _ = tx.send(()); +fn main() { + env_logger::init(); + tokio::run(lazy(|| { + start_serving_metrics(); + start_pinging_hosts(); + Ok(()) + })); }