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

    pub struct SystemRegistry { /* fields omitted */ }

System wide actors registry

System registry serves same purpose as Registry, except it is shared across all arbiters.

# 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 SystemService 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>) {
            let act = System::current().registry().get::<MyActor1>();
            act.do_send(Ping);
        }
    }

    fn main() {
        // initialize system
        let code = System::run(|| {
            // Start MyActor1
            let addr = MyActor1.start();

            // Start MyActor2
            let addr = MyActor2.start();
        });
    }

## Methods

###

`impl SystemRegistry`

####

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

Return address of the service. If service actor is not running it get started in the system.

####

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

Check if actor is in registry, if so, return its address

####

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

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

## Trait Implementations

###

`impl Debug for SystemRegistry`

####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>` |

Formats the value using the given formatter. Read more

###

`impl Clone for SystemRegistry`

####

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

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 SystemRegistry`

###

`impl Sync for SystemRegistry`

## Blanket Implementations

###

`impl<T> ToOwned for T where T: Clone,`

[src]

#### `type Owned = T`

####

`fn to_owned(&self) -> T`

[src]

Creates owned data from borrowed data, usually by cloning. Read more

####

`fn clone_into(&self, target: &mut T)`

[src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into`)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

###

`impl<T> From for T`

[src]

####

`fn from(t: T) -> T`

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Performs the conversion.

###

`impl<T, U> Into for T where U: From<T>,`

[src]

####

`fn into(self) -> U`

[src]

Performs the conversion.

###

`impl<T, U> TryFrom for T where T: From<U>,`

[src]

#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from`)

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from`)

Performs the conversion.

###

`impl<T> Borrow for T where T: ?Sized,`

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####

`fn borrow(&self) -> &T`

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Immutably borrows from an owned value. Read more

###

`impl<T> BorrowMut for T where T: ?Sized,`

[src]

####

`fn borrow_mut(&mut self) -> &mut T`

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Mutably borrows from an owned value. Read more

###

`impl<T, U> TryInto for T where U: TryFrom<T>,`

[src]

#### `type Error = <U as TryFrom<T>>::Error`

🔬 This is a nightly-only experimental API. (`try_from`)

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

[src]

🔬 This is a nightly-only experimental API. (`try_from`)

Performs the conversion.

###

`impl<T> Any for T where T: 'static + ?Sized,`

[src]

####

`fn get_type_id(&self) -> TypeId`

[src]

🔬 This is a nightly-only experimental API. (`get_type_id`)

this method will likely be replaced by an associated static

Gets the `TypeId` of `self`. Read more

###

`impl<T> Erased for T`

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