Add notifier to break relay loop

emgauwa-controller/src/app_state.rs

@@ -1,8 +1,11 @@
+use std::sync::Arc;
+
 use actix::{Actor, Context, Handler, Message};
 use emgauwa_lib::errors::EmgauwaError;
 use emgauwa_lib::models::Controller;
 use futures::executor::block_on;
 use sqlx::{Pool, Sqlite};
+use tokio::sync::Notify;
 
 #[derive(Message)]
 #[rtype(result = "Result<(), EmgauwaError>")]
@@ -12,14 +15,27 @@ pub struct Reload {}
 #[rtype(result = "Controller")]
 pub struct GetThis {}
 
+#[derive(Message)]
+#[rtype(result = "Arc<Notify>")]
+pub struct GetNotifier {}
+
 pub struct AppState {
 	pub pool: Pool<Sqlite>,
 	pub this: Controller,
+	pub notifier: Arc<Notify>,
 }
 
 impl AppState {
 	pub fn new(pool: Pool<Sqlite>, this: Controller) -> AppState {
-		AppState { pool, this }
+		AppState {
+			pool,
+			this,
+			notifier: Arc::new(Notify::new()),
+		}
+	}
+
+	pub fn notify_change(&self) {
+		self.notifier.notify_one();
 	}
 }
 
@@ -35,6 +51,8 @@ impl Handler<Reload> for AppState {
 
 		self.this.reload(&mut pool_conn)?;
 
+		self.notify_change();
+
 		Ok(())
 	}
 }
@@ -46,3 +64,11 @@ impl Handler<GetThis> for AppState {
 		self.this.clone()
 	}
 }
+
+impl Handler<GetNotifier> for AppState {
+	type Result = Arc<Notify>;
+
+	fn handle(&mut self, _msg: GetNotifier, _ctx: &mut Self::Context) -> Self::Result {
+		Arc::clone(&self.notifier)
+	}
+}