Trait sai::Component

pub trait Component: Send + Downcast + ComponentLifecycle {
    fn build(registry: &ComponentRepository) -> Self
    where
        Self: Sized;
    fn meta() -> ComponentMeta<Box<Self>>
    where
        Self: Sized;
}

A Component is a bunch of business-logic behaviors + startup logic.

Normally, you won’t need to manually implement this.

Defining components with no explict startup / shutdown logic

use sai::{Component, Injected};
#[derive(Component)]
struct Bar {}

#[derive(Component)]
struct Foo {
    #[injected]
    bar: Injected<Bar>
}

In above example, Foo and Bar are both component. Foo depends on Bar, the dependency is defined via the #[injected] attributes.

Note: a dependency injected by Sai has to be wrapped by Injected struct.

Component with explict startup / shutdown logic

use sai::{Component, ComponentLifecycle, async_trait};
#[derive(Component)]
#[lifecycle]
struct Foo {
    internal: Option<u32>
}

#[async_trait]
impl ComponentLifecycle for Foo {
    async fn start(&mut self) {
        self.internal = Some(42);
    }
    async fn stop(&mut self) {
        // Any shutdown logic
    }
}

Required methods

fn build(registry: &ComponentRepository) -> Self where
    Self: Sized, 

fn meta() -> ComponentMeta<Box<Self>> where
    Self: Sized, 

Implementors