| 1 |
use clap::Parser; |
| 2 |
use rayon::prelude::*; |
| 3 |
use salaryman::{Service, ServiceConf, ServiceState, SalarymanPacket}; |
| 4 |
use serde::{Deserialize, Serialize}; |
| 5 |
use std::{ |
| 6 |
io::{Read, Write}, |
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fs::{File, read_to_string}, |
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os::unix::net::UnixListener, |
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path::PathBuf, |
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sync::mpsc::{TryRecvError, channel}, |
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}; |
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use uuid::Uuid; |
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|
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#[derive(Parser, Debug)] |
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#[command(version, about, long_about = None)] |
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struct Args { |
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#[arg( |
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short, |
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long, |
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value_name = "FILE", |
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help = "config file override", |
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default_value = "None", |
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)] |
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config: Option<PathBuf>, |
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#[arg( |
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short, |
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long, |
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value_name = "SOCK", |
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help = "UNIX socket to bind", |
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default_value = "/tmp/salaryman.sock" |
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)] |
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socket: PathBuf, |
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} |
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|
| 35 |
pub enum InnerProtocol { |
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Create(ServiceConf), |
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Delete(Uuid), |
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Start(Uuid), |
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Stop(Uuid), |
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Write((Uuid, String)), |
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Scan, |
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Quit, |
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} |
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|
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#[derive(Serialize, Deserialize, Clone, Debug)] |
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pub struct Config { |
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pub socket: Option<PathBuf>, |
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pub service: Vec<ServiceConf>, |
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} |
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impl Config { |
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pub fn new() -> Self { |
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Self { |
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socket: None, |
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service: Vec::new(), |
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} |
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} |
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} |
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|
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fn load_config(file: &PathBuf) -> Result<Config, Box<dyn std::error::Error>> { |
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let s: String = match read_to_string(file) { |
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Ok(s) => s, |
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Err(_) => { |
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return Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::NotFound, |
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"cannot find config file", |
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))); |
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} |
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}; |
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match toml::from_str(s.as_str()) { |
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Ok(c) => Ok(c), |
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Err(_) => Err(Box::new(std::io::Error::new( |
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std::io::ErrorKind::Other, |
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"unable to parse config file", |
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))), |
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} |
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} |
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|
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fn _save_config(file: &PathBuf, conf: &Config) -> Result<(), Box<dyn std::error::Error>> { |
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let mut f = File::options().create(true).truncate(true).write(true).open(file)?; |
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f.write(toml::to_string(conf)?.as_bytes())?; |
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Ok(()) |
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} |
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|
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#[cfg(not(target_os = "windows"))] // We cannot build on Windows |
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fn main() -> Result<(), Box<dyn std::error::Error>> { |
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let args = Args::parse(); |
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|
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// Config Handling |
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let local_conf = PathBuf::from("salaryman.conf"); |
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let xdg_conf = PathBuf::from({ |
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if let Ok(xcd) = std::env::var("XDG_CONFIG_HOME") { |
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xcd + "/smd/salaryman.toml" |
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} else { |
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if let Ok(homedir) = std::env::var("HOME") { |
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homedir + "/.config/smd/salaryman.conf" |
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} else { |
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"/root/.config/smd/salaryman.conf".into() |
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} |
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} |
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}); |
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let sys_conf = PathBuf::from("/etc/salaryman/smd/salaryman.conf"); |
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let confpaths = if let Some(path) = args.config.clone() { |
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vec![path] |
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} else { |
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vec![local_conf, xdg_conf, sys_conf] |
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}; |
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let get_conf = |confpaths, p: Option<PathBuf>| -> (PathBuf, Config) { |
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for cfile in confpaths { |
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if let Ok(conf) = load_config(&cfile) { |
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return (cfile.to_owned(), conf); |
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} |
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} |
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if let Some(cpath) = p { |
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(cpath.to_owned(), Config::new()) |
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} else { |
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(PathBuf::from("salaryman.toml"), Config::new()) |
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} |
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}; |
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let (config_path, conf) = get_conf(confpaths, args.config.clone()); |
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|
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let sockaddr = if let Some(sock) = conf.socket { |
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sock |
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} else { |
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args.socket |
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}; |
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let mut services: Vec<Service> = Vec::new(); |
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for service in conf.service { |
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services.push(service.build()?); |
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} |
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// event loop sender |
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let (etx, erx) = channel(); |
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// listener |
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let (ltx, lrx) = channel(); |
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// main services event loop |
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let (stx, srx) = channel(); |
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|
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// for event loop sender to main services event |
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let queue = stx.clone(); |
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let lkill = ltx.clone(); |
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std::thread::spawn(move || { |
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loop { // event loop sender |
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match erx.try_recv() { |
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Err(TryRecvError::Disconnected) | Ok(true) => { |
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queue.send(InnerProtocol::Quit).unwrap_or_default(); |
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lkill.send(true).unwrap_or_default(); |
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return; |
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}, |
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_ => (), |
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} |
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queue.send(InnerProtocol::Scan).unwrap_or_default(); |
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std::thread::sleep(std::time::Duration::from_millis(250)); |
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} |
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}); |
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|
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let ekill = etx.clone(); |
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let lkill = ltx.clone(); |
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std::thread::spawn(move || { |
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// Main Services Event Loop |
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loop { |
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match srx.try_recv() { |
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Err(TryRecvError::Disconnected) | Ok(InnerProtocol::Quit) => { |
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services.par_iter_mut() |
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.for_each(|service| { |
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if let Err(e) = service.stop() { |
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eprintln!("unable to start service {} with id {} due to error {e}", &service.name(), &service.uuid()); |
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} |
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}); |
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ekill.send(true).unwrap_or_default(); |
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lkill.send(true).unwrap_or_default(); |
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return; |
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}, |
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Ok(InnerProtocol::Create(conf)) => if let Ok(s) = conf.build() { services.push(s); }, |
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Ok(InnerProtocol::Start(u)) => { |
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services.par_iter_mut() |
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.filter(|s| s.uuid() == &u) |
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.for_each(|s| { |
| 177 |
if !s.started() { |
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if let Ok(_) = s.start() { |
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return; |
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} |
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} |
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}); |
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}, |
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Ok(InnerProtocol::Stop(u)) => { |
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services.par_iter_mut() |
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.filter(|s| s.uuid() == &u) |
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.for_each(|s| { |
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if s.started() { |
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if let Ok(_) = s.stop() { |
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return; |
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} |
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} |
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}); |
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}, |
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Ok(InnerProtocol::Write((u, buf))) => { |
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services.par_iter_mut() |
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.filter(|s| s.uuid() == &u) |
| 198 |
.for_each(|s| { |
| 199 |
if let Ok(_) = s.write_stdin(&buf) { |
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return; |
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} |
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}); |
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}, |
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Ok(InnerProtocol::Delete(u)) => { |
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if let Some(i) = services.par_iter_mut() |
| 206 |
.position_first(|s| s.uuid() == &u) { |
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if let Err(e) = services[i].stop() { |
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eprintln!("unable to stop service {} with id {} due to error {e}", &services[i].name(), &services[i].uuid()); |
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}; |
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services.swap_remove(i); |
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} |
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}, |
| 213 |
Ok(InnerProtocol::Scan) => { |
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services.par_iter_mut() |
| 215 |
.for_each(|service| { |
| 216 |
match service.state() { |
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ServiceState::Failed => { |
| 218 |
if let Err(e) = service.restart() { |
| 219 |
eprintln!("unable to restart service {} with id {} due to error {e}", &service.name(), &service.uuid()); |
| 220 |
} |
| 221 |
}, |
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_ => (), |
| 223 |
} |
| 224 |
}); |
| 225 |
}, |
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_ => std::thread::sleep(std::time::Duration::from_millis(100)), |
| 227 |
} |
| 228 |
} |
| 229 |
}); |
| 230 |
let listen = UnixListener::bind(sockaddr)?; |
| 231 |
let queue = stx.clone(); |
| 232 |
let ekill = etx.clone(); |
| 233 |
for stream in listen.incoming() { |
| 234 |
match stream { |
| 235 |
Ok(mut stream) => { |
| 236 |
match lrx.try_recv() { |
| 237 |
Err(TryRecvError::Disconnected) | Ok(true) => { |
| 238 |
ekill.send(true).unwrap_or_default(); |
| 239 |
queue.send(InnerProtocol::Quit).unwrap_or_default(); |
| 240 |
return Ok(()); |
| 241 |
}, |
| 242 |
_ => (), |
| 243 |
} |
| 244 |
let squeue = queue.clone(); |
| 245 |
std::thread::spawn(move || { |
| 246 |
let mut buf = String::new(); |
| 247 |
if let Ok(len) = stream.read_to_string(&mut buf) { |
| 248 |
if len > 0 { |
| 249 |
let resp = match SalarymanPacket::deserialize(&buf.as_bytes()) { |
| 250 |
Ok(SalarymanPacket::Create(sc)) => { |
| 251 |
squeue.send(InnerProtocol::Create(sc.to_owned())).unwrap_or_default(); |
| 252 |
SalarymanPacket::response(&SalarymanPacket::Create(sc)) |
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}, |
| 254 |
Ok(SalarymanPacket::Delete(u)) => { |
| 255 |
squeue.send(InnerProtocol::Delete(u.to_owned())).unwrap_or_default(); |
| 256 |
SalarymanPacket::response(&SalarymanPacket::Delete(u)) |
| 257 |
}, |
| 258 |
Ok(SalarymanPacket::Start(u)) => { |
| 259 |
squeue.send(InnerProtocol::Start(u.to_owned())).unwrap_or_default(); |
| 260 |
SalarymanPacket::response(&SalarymanPacket::Start(u)) |
| 261 |
}, |
| 262 |
Ok(SalarymanPacket::Stop(u)) => { |
| 263 |
squeue.send(InnerProtocol::Stop(u.to_owned())).unwrap_or_default(); |
| 264 |
SalarymanPacket::response(&SalarymanPacket::Stop(u)) |
| 265 |
}, |
| 266 |
Ok(SalarymanPacket::Restart(u)) => { |
| 267 |
squeue.send(InnerProtocol::Stop(u.to_owned())).unwrap_or_default(); |
| 268 |
squeue.send(InnerProtocol::Start(u.to_owned())).unwrap_or_default(); |
| 269 |
SalarymanPacket::response(&SalarymanPacket::Restart(u)) |
| 270 |
}, |
| 271 |
Ok(SalarymanPacket::Quit) => { |
| 272 |
squeue.send(InnerProtocol::Quit).unwrap_or_default(); |
| 273 |
SalarymanPacket::response(&SalarymanPacket::Quit) |
| 274 |
}, |
| 275 |
Ok(b) => SalarymanPacket::response(&b), |
| 276 |
Err(_) => SalarymanPacket::Invalid, |
| 277 |
}; |
| 278 |
let resp = if let Ok(i) = SalarymanPacket::serialize(&resp) { |
| 279 |
i |
| 280 |
} else { |
| 281 |
Vec::new() |
| 282 |
}; |
| 283 |
if let Ok(len) = stream.write(&resp) { |
| 284 |
if len > 0 { |
| 285 |
stream.flush().unwrap_or_default(); |
| 286 |
} |
| 287 |
} |
| 288 |
} |
| 289 |
} |
| 290 |
}); |
| 291 |
}, |
| 292 |
Err(_) => { |
| 293 |
match lrx.try_recv() { |
| 294 |
Err(TryRecvError::Disconnected) | Ok(true) => { |
| 295 |
ekill.send(true).unwrap_or_default(); |
| 296 |
queue.send(InnerProtocol::Quit).unwrap_or_default(); |
| 297 |
return Ok(()); |
| 298 |
}, |
| 299 |
_ => (), |
| 300 |
} |
| 301 |
}, |
| 302 |
} |
| 303 |
} |
| 304 |
Ok(()) |
| 305 |
} |
| 306 |
|
