121 lines
3.0 KiB
Rust
121 lines
3.0 KiB
Rust
use anyhow::{Error};
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use lazy_static::lazy_static;
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use std::sync::Mutex;
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use futures::*;
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use tokio::signal::unix::{signal, SignalKind};
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use crate::tools::{self, BroadcastData};
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#[derive(PartialEq, Copy, Clone, Debug)]
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pub enum ServerMode {
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Normal,
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Shutdown,
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}
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pub struct ServerState {
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pub mode: ServerMode,
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pub shutdown_listeners: BroadcastData<()>,
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pub last_worker_listeners: BroadcastData<()>,
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pub worker_count: usize,
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pub reload_request: bool,
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}
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lazy_static! {
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static ref SERVER_STATE: Mutex<ServerState> = Mutex::new(ServerState {
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mode: ServerMode::Normal,
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shutdown_listeners: BroadcastData::new(),
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last_worker_listeners: BroadcastData::new(),
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worker_count: 0,
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reload_request: false,
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});
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}
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pub fn server_state_init() -> Result<(), Error> {
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let mut stream = signal(SignalKind::interrupt())?;
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let future = async move {
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while stream.recv().await.is_some() {
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println!("got shutdown request (SIGINT)");
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SERVER_STATE.lock().unwrap().reload_request = false;
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tools::request_shutdown();
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}
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}.boxed();
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let abort_future = last_worker_future().map_err(|_| {});
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let task = futures::future::select(future, abort_future);
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tokio::spawn(task.map(|_| ()));
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let mut stream = signal(SignalKind::hangup())?;
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let future = async move {
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while stream.recv().await.is_some() {
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println!("got reload request (SIGHUP)");
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SERVER_STATE.lock().unwrap().reload_request = true;
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tools::request_shutdown();
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}
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}.boxed();
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let abort_future = last_worker_future().map_err(|_| {});
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let task = futures::future::select(future, abort_future);
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tokio::spawn(task.map(|_| ()));
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Ok(())
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}
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pub fn is_reload_request() -> bool {
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let data = SERVER_STATE.lock().unwrap();
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data.mode == ServerMode::Shutdown && data.reload_request
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}
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pub fn server_shutdown() {
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let mut data = SERVER_STATE.lock().unwrap();
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println!("SET SHUTDOWN MODE");
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data.mode = ServerMode::Shutdown;
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data.shutdown_listeners.notify_listeners(Ok(()));
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drop(data); // unlock
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check_last_worker();
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}
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pub fn shutdown_future() -> impl Future<Output = ()> {
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let mut data = SERVER_STATE.lock().unwrap();
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data
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.shutdown_listeners
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.listen()
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.map(|_| ())
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}
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pub fn last_worker_future() -> impl Future<Output = Result<(), Error>> {
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let mut data = SERVER_STATE.lock().unwrap();
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data.last_worker_listeners.listen()
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}
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pub fn set_worker_count(count: usize) {
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let mut data = SERVER_STATE.lock().unwrap();
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data.worker_count = count;
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if !(data.mode == ServerMode::Shutdown && data.worker_count == 0) { return; }
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data.last_worker_listeners.notify_listeners(Ok(()));
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}
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pub fn check_last_worker() {
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let mut data = SERVER_STATE.lock().unwrap();
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if !(data.mode == ServerMode::Shutdown && data.worker_count == 0) { return; }
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data.last_worker_listeners.notify_listeners(Ok(()));
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}
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