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Nanaloveyuki
81 lines
2.3 KiB
Markdown
81 lines
2.3 KiB
Markdown
---
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name: runtime-file-state-to-json
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group: api
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category: runtime
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update-time: 20260512
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description: Convert RuntimeFileState into a JSON value that combines file status with outer queue runtime metrics.
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key-word:
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- runtime
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- file
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- state
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- public
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---
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## Runtime-file-state-to-json
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Convert `RuntimeFileState` into a `JsonValue`. This helper exports both file sink status and queue metrics for combined runtime file diagnostics.
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### Interface
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```moonbit
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pub fn runtime_file_state_to_json(state : RuntimeFileState) -> @json_parser.JsonValue {}
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```
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#### input
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- `state : RuntimeFileState` - Combined file and queue runtime snapshot.
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#### output
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- `JsonValue` - Structured JSON representation of the runtime file state.
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### Explanation
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Detailed rules explaining key parameters and behaviors
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- The output includes `file`, `queued`, `pending_count`, and `dropped_count`.
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- `file` is itself exported as a nested file sink state object.
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- This helper is richer than `file_sink_state_to_json(...)` because it also carries queue wrapping context.
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- It is useful for `RuntimeSink::file_runtime_state()`, `ConfiguredLogger::file_runtime_state()`, and similar queued-file diagnostics flows.
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### How to Use
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Here are some specific examples provided.
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#### When Need Structured Queued-file Diagnostics
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When file and queue status should be exported together:
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```moonbit
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let value = runtime_file_state_to_json(snapshot)
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```
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In this example, callers receive a machine-readable combined runtime snapshot.
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#### When Need Support Payload Composition
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When queued file runtime data should be embedded into a larger JSON object:
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```moonbit
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match runtime.file_runtime_state() {
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Some(snapshot) => {
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let payload = runtime_file_state_to_json(snapshot)
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ignore(payload)
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}
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None => ()
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}
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```
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In this example, the helper keeps file-plus-queue diagnostics in one reusable JSON value after the optional runtime snapshot is read.
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### Error Case
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e.g.:
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- If `queued=false`, the state still serializes normally with queue counters present.
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- If callers need direct text output, `stringify_runtime_file_state(...)` is the better API.
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### Notes
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1. Use this helper when file and queue runtime context should stay together.
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2. It is especially useful for queued file runtime paths, whether accessed directly or through configured loggers.
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