qsu 0.10.1

Service subsystem utilities and runtime wrapper.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141

#[cfg(all(feature = "rt", feature = "rocket"))]
#[macro_use]
extern crate rocket;

#[cfg(all(feature = "rt", feature = "rocket"))]
mod gate {
  use tokio::{sync::mpsc, task};

  use qsu::rocket::Rocket;

  use qsu::{
    async_trait,
    rt::{
      InitCtx, RocketServiceHandler, RunCtx, RunEnv, SrvAppRt, SvcEvt, TermCtx
    },
    tracing
  };

  #[derive(Debug)]
  enum MyError {}

  struct MyService {
    rx: Option<mpsc::UnboundedReceiver<SvcEvt>>
  }

  #[async_trait]
  impl RocketServiceHandler for MyService {
    type AppErr = MyError;

    async fn init(
      &mut self,
      ictx: &mut InitCtx
    ) -> Result<Vec<Rocket<rocket::Build>>, Self::AppErr> {
      tracing::info!("Running RocketServiceHandler::init()");

      ictx.report(Some("Building a rocket"));
      let rockets = vec![rocket::build().mount("/", routes![index])];

      ictx.report(Some("Finalized service handler initialization"));

      Ok(rockets)
    }

    async fn run(
      &mut self,
      mut rockets: Vec<Rocket<rocket::Ignite>>,
      _re: &RunEnv
    ) -> Result<(), Self::AppErr> {
      tracing::info!("Running RocketServiceHandler::run()");

      // Spawn a task to handle service events
      let mut rx = self.rx.take().unwrap();
      task::spawn(async move {
        loop {
          if let Some(msg) = rx.recv().await {
            tracing::info!("Application received qsu event {:?}", msg);
            if let SvcEvt::Shutdown(_) = msg {
              break;
            }
          }
        }
      });

      if let Some(rocket) = rockets.pop() {
        rocket.launch().await.unwrap();
      }

      Ok(())
    }

    async fn shutdown(
      &mut self,
      tctx: &mut TermCtx
    ) -> Result<(), Self::AppErr> {
      tracing::info!("Running RocketServiceHandler::shutdown()");
      tctx.report(Some("Terminating service handler"));

      // .. do termination here ..

      tctx.report(Some("Finalized service handler termination"));

      Ok(())
    }
  }


  pub fn main() {
    let svcname = qsu::default_service_name().unwrap();

    // Channel used to signal termination from service event handler to main
    // application
    let (tx, rx) = mpsc::unbounded_channel();

    // Service event handler
    let svcevt_handler = move |msg| {
      let _ = tx.send(msg);
    };

    // Set up main service runtime handler
    let svcrt = MyService { rx: Some(rx) };

    // Define service application runtime components
    let apprt = SrvAppRt::Rocket {
      svcevt_handler: Box::new(svcevt_handler),
      rt_handler: Box::new(svcrt)
    };

    // Launch service
    let rctx = RunCtx::new(&svcname);
    rctx.run(apprt).unwrap();
  }


  #[get("/")]
  fn index() -> &'static str {
    log::error!("error");
    log::warn!("warn");
    log::info!("info");
    log::debug!("debug");
    log::trace!("trace");

    tracing::error!("error");
    tracing::warn!("warn");
    tracing::info!("info");
    tracing::debug!("debug");
    tracing::trace!("trace");

    "Hello, world!"
  }
}


fn main() {
  #[cfg(all(feature = "rt", feature = "rocket"))]
  gate::main();

  #[cfg(not(all(feature = "rt", feature = "rocket")))]
  println!("simplerocket example requires the rt and rocket features");
}

// vim: set ft=rust et sw=2 ts=2 sts=2 cinoptions=2 tw=79 :