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Nanaloveyuki
76 lines
1.9 KiB
Markdown
76 lines
1.9 KiB
Markdown
---
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name: stringify-file-sink-policy
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group: api
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category: runtime
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update-time: 20260512
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description: Serialize FileSinkPolicy into compact or pretty JSON text for diagnostics and policy snapshots.
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key-word:
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- file
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- policy
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- stringify
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- public
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---
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## Stringify-file-sink-policy
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Serialize `FileSinkPolicy` into JSON text. This helper is the most direct export path for runtime file policy snapshots.
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### Interface
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```moonbit
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pub fn stringify_file_sink_policy(policy : FileSinkPolicy, pretty~ : Bool = false) -> String {}
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```
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#### input
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- `policy : FileSinkPolicy` - File sink runtime policy to serialize.
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- `pretty : Bool` - Whether JSON should be pretty-printed.
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#### output
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- `String` - Serialized JSON text for the file policy.
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### Explanation
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Detailed rules explaining key parameters and behaviors
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- `pretty=false` returns compact JSON.
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- `pretty=true` returns indented JSON for human inspection.
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- This helper builds on top of `file_sink_policy_to_json(...)`.
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- The output is suited for support dumps, policy snapshots, and generated diagnostics text.
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### How to Use
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Here are some specific examples provided.
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#### When Need Human-readable Policy Output
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When current file policy should be printed for diagnostics:
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```moonbit
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println(stringify_file_sink_policy(sink.policy(), pretty=true))
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```
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In this example, the runtime file policy is rendered in readable JSON.
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#### When Need Compact Policy Export
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When a file policy snapshot should stay small:
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```moonbit
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let text = stringify_file_sink_policy(sink.policy())
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```
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In this example, compact JSON is produced without extra formatting logic.
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### Error Case
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e.g.:
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- If callers need a `JsonValue` for composition rather than text, `file_sink_policy_to_json(...)` is the better API.
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- If rotation is disabled, the output still includes `rotation` as `null`.
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### Notes
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1. Use this helper for direct textual policy snapshots.
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2. `pretty=true` is useful when operators or support tooling are the audience.
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