mirror of
https://github.com/Nanaloveyuki/BitLogger.git
synced 2026-05-30 15:42:25 +00:00
Nanaloveyuki
75 lines
2.0 KiB
Markdown
75 lines
2.0 KiB
Markdown
---
|
|
name: file-sink-state-to-json
|
|
group: api
|
|
category: runtime
|
|
update-time: 20260512
|
|
description: Convert FileSinkState into a JSON value for file sink diagnostics and state transport.
|
|
key-word:
|
|
- file
|
|
- state
|
|
- json
|
|
- public
|
|
---
|
|
|
|
## File-sink-state-to-json
|
|
|
|
Convert `FileSinkState` into a `JsonValue`. This helper exports file path, availability, policy flags, rotation config, and failure counters in a structured form.
|
|
|
|
### Interface
|
|
|
|
```moonbit
|
|
pub fn file_sink_state_to_json(state : FileSinkState) -> @json_parser.JsonValue {}
|
|
```
|
|
|
|
#### input
|
|
|
|
- `state : FileSinkState` - File sink state snapshot to export.
|
|
|
|
#### output
|
|
|
|
- `JsonValue` - Structured JSON representation of the file sink state.
|
|
|
|
### Explanation
|
|
|
|
Detailed rules explaining key parameters and behaviors
|
|
|
|
- The output includes `path`, `available`, `append`, `auto_flush`, failure counters, and `rotation`.
|
|
- `rotation` is exported as `null` when rotation is disabled.
|
|
- This helper exports state snapshots, not mutable runtime control handles.
|
|
- It is useful when file sink state should be embedded into larger diagnostics payloads.
|
|
|
|
### How to Use
|
|
|
|
Here are some specific examples provided.
|
|
|
|
#### When Need Structured File Diagnostics
|
|
|
|
When file sink status should be composed into a larger JSON object:
|
|
```moonbit
|
|
let value = file_sink_state_to_json(sink.state())
|
|
```
|
|
|
|
In this example, callers receive a structured file-state snapshot instead of plain text.
|
|
|
|
#### When Need Runtime State Snapshots For Tooling
|
|
|
|
When support tooling should ingest file sink state programmatically:
|
|
```moonbit
|
|
let snapshot = file_sink_state_to_json(state)
|
|
```
|
|
|
|
In this example, the helper exposes all major file-state fields in machine-readable form.
|
|
|
|
### Error Case
|
|
|
|
e.g.:
|
|
- If the file is unavailable, the exported snapshot still serializes normally with `available=false`.
|
|
|
|
- If callers need direct text output, `stringify_file_sink_state(...)` is the better API.
|
|
|
|
### Notes
|
|
|
|
1. Use this helper when diagnostics consumers expect `JsonValue`.
|
|
|
|
2. It pairs naturally with `FileSink::state()` and `ConfiguredLogger::file_state()`.
|