# actix_web::actix::actix::dev::Registry - Rust
API documentation for the Rust `Registry` struct in crate `actix_web`.
Keywords: rust, rustlang, rust-lang, Registry

# Struct actix_web::actix::actix::dev::Registry [−]

    pub struct Registry { /* fields omitted */ }

Actors registry

Actor can register itself as a service. Service can be defined as `ArbiterService` which is unique per arbiter or `SystemService` which is unique per system.

If arbiter service is used outside of runnig arbiter, it panics.

# Example

    use actix::prelude::*;

    #[derive(Message)]
    struct Ping;

    #[derive(Default)]
    struct MyActor1;

    impl Actor for MyActor1 {
        type Context = Context<Self>;
    }
    impl actix::Supervised for MyActor1 {}

    impl ArbiterService for MyActor1 {
       fn service_started(&mut self, ctx: &mut Context<Self>) {
          println!("Service started");
       }
    }

    impl Handler<Ping> for MyActor1 {
       type Result = ();

       fn handle(&mut self, _: Ping, ctx: &mut Context<Self>) {
          println!("ping");
       }
    }

    struct MyActor2;

    impl Actor for MyActor2 {
       type Context = Context<Self>;

       fn started(&mut self, _: &mut Context<Self>) {
          // get MyActor1 addres from the registry
          let act = Arbiter::registry().get::<MyActor1>();
          act.do_send(Ping);
       }
    }

    fn main() {
        // initialize system
        let code = System::run(|| {

            // Start MyActor1 in new Arbiter
            Arbiter::start(|_| {
                MyActor2
            });
        });
    }

## Methods

###

`impl Registry`

####

`pub fn get<A>(&self) -> Addr<A> where A: Actor<Context = Context<A>> + ArbiterService,` |

Query registry for specific actor. Returns address of the actor. If actor is not registered, starts new actor and return address of newly created actor.

####

`pub fn set<A>(&self, addr: Addr<A>) where A: Actor<Context = Context<A>> + ArbiterService,` |

Add new actor to the registry by address, panic if actor is already running

## Trait Implementations

###

`impl Clone for Registry`

####

`fn clone(&self) -> Registry` |

Returns a copy of the value. Read more

####

`fn clone_from(&mut self, source: &Self)`

1.0.0
[src]

Performs copy-assignment from `source`. Read more

## Auto Trait Implementations

###

`impl !Send for Registry`

###

`impl !Sync for Registry`

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