Trait runtime_injector_actix::IntoSingleton

pub trait IntoSingleton<D, R, F> where
    R: Service,
    F: ServiceFactory<D, Result = R>, {
    #[must_use]
    fn singleton(self) -> SingletonProvider<D, R, F>;
}

Defines a conversion into a singleton provider. This trait is automatically implemented for all service factories.

Required methods

#[must_use]

fn singleton(self) -> SingletonProvider<D, R, F>

Creates a singleton provider. Singleton providers create their values only once (when first requested) and reuse that value for each future request.

Example

use runtime_injector::{Injector, IntoSingleton, Svc};

#[derive(Default)]
struct Foo;

let mut builder = Injector::builder();
builder.provide(Foo::default.singleton());

let injector = builder.build();
let foo1: Svc<Foo> = injector.get().unwrap();
let foo2: Svc<Foo> = injector.get().unwrap();

assert!(Svc::ptr_eq(&foo1, &foo2));

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Implementors

impl<D, R, F> IntoSingleton<D, R, F> for F where
    R: Service,
    F: ServiceFactory<D, Result = R>, 

pub fn singleton(self) -> SingletonProvider<D, R, F>

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