mirror of
https://github.com/Nanaloveyuki/BitLogger.git
synced 2026-07-24 00:42:18 +00:00
Nanaloveyuki
77 lines
2.6 KiB
Markdown
77 lines
2.6 KiB
Markdown
---
|
|
name: library-async-logger
|
|
group: api
|
|
category: facade
|
|
update-time: 20260613
|
|
description: Public library-facing async logger facade type used to expose a narrower surface than AsyncLogger.
|
|
key-word:
|
|
- library
|
|
- async
|
|
- facade
|
|
- public
|
|
---
|
|
|
|
## Library-async-logger
|
|
|
|
`LibraryAsyncLogger[S]` is the public library-facing async logger facade type. It wraps `AsyncLogger[S]` and keeps queue-backed async logging behavior while intentionally exposing a narrower public surface for package boundaries.
|
|
|
|
### Interface
|
|
|
|
```moonbit
|
|
pub struct LibraryAsyncLogger[S] {
|
|
inner : AsyncLogger[S]
|
|
}
|
|
```
|
|
|
|
#### output
|
|
|
|
- `LibraryAsyncLogger[S]` - Public library-oriented async logger wrapper over a concrete sink type `S`.
|
|
|
|
### Explanation
|
|
|
|
Detailed rules explaining key parameters and behaviors
|
|
|
|
- This is a public facade struct, not a type alias.
|
|
- The wrapped sink type `S` is preserved, so sink-specific typing remains available through the facade type parameter.
|
|
- The facade keeps common library-safe async operations such as `new(...)`, `with_target(...)`, `child(...)`, `bind(...)`, `is_enabled(...)`, `run()`, `shutdown()`, and the main async write methods.
|
|
- Call `to_async_logger()` when later code must recover the full underlying `AsyncLogger[S]` surface.
|
|
|
|
### How to Use
|
|
|
|
Here are some specific examples provided.
|
|
|
|
#### When Need A Narrower Public Async Logger Type
|
|
|
|
When a package should expose async logging capability without publishing the full `AsyncLogger[S]` API:
|
|
```moonbit
|
|
let logger : LibraryAsyncLogger[@bitlogger.ConsoleSink] = LibraryAsyncLogger::new(
|
|
@bitlogger.console_sink(),
|
|
target="lib.async",
|
|
)
|
|
```
|
|
|
|
In this example, the package boundary exposes the library async facade instead of the full async logger type.
|
|
|
|
#### When Need To Recover The Full Async Logger Later
|
|
|
|
When a library-facing async facade should later be adapted back into the ordinary async logger surface:
|
|
```moonbit
|
|
let full = logger.to_async_logger()
|
|
ignore(full.pending_count())
|
|
```
|
|
|
|
In this example, the facade can be unwrapped when broader async lifecycle or state operations are needed internally.
|
|
|
|
### Error Case
|
|
|
|
e.g.:
|
|
- `LibraryAsyncLogger[S]` itself does not have a runtime failure mode.
|
|
|
|
- Runtime behavior still depends on the wrapped sink `S` and async runtime support, so sink-specific or target-specific limitations remain unchanged behind the facade.
|
|
|
|
### Notes
|
|
|
|
1. Use `LibraryAsyncLogger::new(...)`, `build_library_async_logger(...)`, or `parse_and_build_library_async_logger(...)` when you need a value of this type.
|
|
|
|
2. Use `AsyncLogger[S]` directly when exposing the full async lifecycle and state surface is acceptable.
|