add support for unix signals

examples/signals/src/main.rs

@@ -0,0 +1,30 @@
+extern crate actix;
+extern crate actix_web;
+extern crate futures;
+extern crate env_logger;
+
+use actix_web::*;
+use actix::Arbiter;
+use actix::actors::signal::{ProcessSignals, Subscribe};
+
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    let _ = env_logger::init();
+    let sys = actix::System::new("signals-example");
+
+    let addr = HttpServer::new(|| {
+        Application::new()
+            // enable logger
+            .middleware(middleware::Logger::default())
+            .resource("/", |r| r.h(httpcodes::HTTPOk))})
+        .bind("127.0.0.1:8080").unwrap()
+        .start();
+
+    // Subscribe to unix signals
+    let signals = Arbiter::system_registry().get::<ProcessSignals>();
+    signals.send(Subscribe(addr.subscriber()));
+
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}