You could still write this with callbacks, in fact, getUser could be a synchronous callback in some languages, blocking the (green)thread.
The general idea is that you are "scheduling" work for after the asynchronous condition is determined, and keeping a "handle" to the work to know if/when it succeeds. This could be a part of the language runtime, or directly in your application code, where there is more opportunity to retry/batch/time out your pending "tasks".
But yeah, the initialization phase, including critical assertions, is a totally separate story.
For example the way you schedule network actions with an
offline-first/optimistic update system like Apollo, the Firebase client, etc.
Chaining on an actual promise of a network request or filling a stack of "tasks" which will begin sending to the network after a "cameOnline" poll or callback fundamentally represents the same idea: Preparing now actions that may run in the future if conditions are right.
You could still write this with callbacks, in fact,
getUsercould be a synchronous callback in some languages, blocking the (green)thread.The general idea is that you are "scheduling" work for after the asynchronous condition is determined, and keeping a "handle" to the work to know if/when it succeeds. This could be a part of the language runtime, or directly in your application code, where there is more opportunity to retry/batch/time out your pending "tasks".
But yeah, the initialization phase, including critical assertions, is a totally separate story.
In the second paragraph, are you talking about " job queue " ?
Yeah.
For example the way you schedule network actions with an
offline-first/optimistic update system like Apollo, the Firebase client, etc.
Chaining on an actual promise of a network request or filling a stack of "tasks" which will begin sending to the network after a "cameOnline" poll or callback fundamentally represents the same idea: Preparing now actions that may run in the future if conditions are right.
I see, thanks for sharing your thoughts Mihail 😊