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Nanaloveyuki
75 lines
2.1 KiB
Markdown
75 lines
2.1 KiB
Markdown
---
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name: configured-logger-file-state
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group: api
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category: runtime
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update-time: 20260512
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description: Read the current file sink snapshot from a configured runtime logger.
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key-word:
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- logger
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- runtime
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- file
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- public
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---
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## Configured-logger-file-state
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Read the current file sink snapshot from a `ConfiguredLogger`. This helper exposes path, availability, policy flags, rotation config, and failure counters as one object.
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### Interface
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```moonbit
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pub fn ConfiguredLogger::file_state(self : ConfiguredLogger) -> FileSinkState {}
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```
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#### input
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- `self : ConfiguredLogger` - Config-driven runtime logger whose file state snapshot should be inspected.
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#### output
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- `FileSinkState` - Current file sink snapshot.
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### Explanation
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Detailed rules explaining key parameters and behaviors
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- File-backed sinks return a live snapshot of file state.
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- Queued file sinks forward the snapshot from the wrapped file sink.
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- Non-file sinks return a fallback empty-state snapshot.
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- This helper is broader than individual file counters or policy accessors because it aggregates core file status into one read.
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### How to Use
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Here are some specific examples provided.
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#### When Need A Full File Health Snapshot
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When diagnostics should inspect runtime file state as one object:
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```moonbit
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let state = logger.file_state()
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```
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In this example, callers receive a single file-state snapshot instead of querying each property separately.
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#### When Need To Export File Runtime Diagnostics
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When a support path should serialize current file state:
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```moonbit
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println(stringify_file_sink_state(logger.file_state(), pretty=true))
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```
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In this example, the configured logger snapshot can be exported directly through existing JSON helpers.
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### Error Case
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e.g.:
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- If the configured sink is not file-backed, the returned snapshot is a fallback empty-style state rather than a live file view.
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- If callers also need queue context for queued file sinks, `file_runtime_state()` is the richer API.
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### Notes
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1. Use this helper for the main one-shot file status snapshot.
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2. Prefer it over individual counters when broader file diagnostics are needed.
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