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Nanaloveyuki
84 lines
2.2 KiB
Markdown
84 lines
2.2 KiB
Markdown
---
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name: async-logger-debug
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group: api
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category: async
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update-time: 20260512
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description: Enqueue a debug-level record through the async logger using the built-in severity shortcut.
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key-word:
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- async
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- logger
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- debug
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- public
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---
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## Async-logger-debug
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Enqueue a debug-level record through the async logger. This is the convenience wrapper for `log(Level::Debug, ...)`.
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### Interface
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```moonbit
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pub async fn[S] AsyncLogger::debug(
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self : AsyncLogger[S],
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message : String,
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fields~ : Array[@bitlogger.Field] = [],
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) -> Unit {}
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```
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#### input
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- `self : AsyncLogger[S]` - Async logger that should receive the debug record.
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- `message : String` - Debug message text.
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- `fields : Array[Field]` - Optional structured fields added to the record.
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#### output
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- `Unit` - No return value. The record is handled according to logger state and policy.
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### Explanation
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Detailed rules explaining key parameters and behaviors
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- This helper delegates to `log(Level::Debug, ...)`.
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- The record is still subject to min-level gating, patching, filtering, and overflow policy.
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- Debug records are useful for development and targeted diagnostics.
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- Use this helper when a named debug call is clearer than a raw `log(...)` call.
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### How to Use
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Here are some specific examples provided.
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#### When Need Async Development Diagnostics
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When intermediate async flow details should be visible during debugging:
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```moonbit
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await logger.debug("loaded worker config")
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```
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In this example, the call site communicates its intended diagnostic level directly.
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#### When Attach Structured Debug Context
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When a debug event should include extra fields:
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```moonbit
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await logger.debug(
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"dispatch start",
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fields=[@bitlogger.field("job_id", "42")],
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)
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```
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In this example, the record carries structured context without needing the generic `log(...)` form.
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### Error Case
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e.g.:
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- If the logger minimum level is above `Debug`, the record is skipped before enqueue.
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- If the logger is closed or overflow policy prevents acceptance, the write may not become a normal queued record.
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### Notes
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1. Prefer this helper when the event is semantically debug-level.
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2. Use `log(...)` when the level must be chosen dynamically.
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