Question on program flow and resolving dependencies

[nkconnor]

Is there a method to resolve some component from the System or is the expected workflow to kick-off a program in an associated Lifecycle? E.g. the later,

#[derive(Component)]
struct StartProgram { }

#[async_trait]
impl ComponentLifecycle for StartProgram {
    async start(&mut self) {
       // start main program logic and add injected stuff to StartProgram constructor

[zhming0]

Is there a method to resolve some component from the System

There is no public method for this at this moment. In the future, I might add it for testing purpose.

is the expected workflow to kick-off a program in an associated Lifecycle?

Hmmmmm, I am not 100% following the question.
A program should kick-off a System and the system will initialize & start all components.

#[derive(Component)]
#[lifecycle]
struct StartProgram { 
    #[injected]
    stuff: Injected<SomeType>
}

#[async_trait]
impl ComponentLifecycle for StartProgram {
    async start(&mut self) {
       // At this point, all dependency of StartProgram would have been initialized & started. 
       self.stuff.do_something();

[nkconnor]

you answered my questions, thank you!