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Nanaloveyuki
94 lines
2.7 KiB
Markdown
94 lines
2.7 KiB
Markdown
---
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name: sink-config-new
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group: api
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category: config
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update-time: 20260613
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description: Construct a SinkConfig value for config-driven logger sink selection.
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key-word:
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- sink
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- config
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- constructor
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- public
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---
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## Sink-config-new
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Construct a `SinkConfig` value for config-driven logger assembly. This constructor stores sink shape and sink-specific settings as typed data for later runtime building.
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### Interface
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```moonbit
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pub fn SinkConfig::new(
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kind~ : SinkKind = SinkKind::Console,
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path~ : String = "",
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append~ : Bool = true,
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auto_flush~ : Bool = true,
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rotation~ : FileRotation? = None,
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text_formatter~ : TextFormatterConfig = default_text_formatter_config(),
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) -> SinkConfig {
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```
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#### input
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- `kind : SinkKind` - Sink variant such as `Console`, `JsonConsole`, `TextConsole`, or `File`.
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- `path : String` - File path used when `kind=File`.
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- `append : Bool` - File append policy.
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- `auto_flush : Bool` - File auto-flush policy.
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- `rotation : FileRotation?` - Optional file rotation policy.
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- `text_formatter : TextFormatterConfig` - Formatter config used by text console or file text rendering.
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#### output
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- `SinkConfig` - Typed sink configuration used by `LoggerConfig`.
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### Explanation
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Detailed rules explaining key parameters and behaviors
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- The constructor stores the supplied sink-shape and file-specific fields directly.
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- `kind` defaults to `SinkKind::Console`.
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- `text_formatter` defaults to `default_text_formatter_config()` so text-oriented sink config always has a formatter config available.
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- File-only options are stored even though only `kind=File` actually consumes them at runtime.
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### How to Use
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Here are some specific examples provided.
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#### When Build A Text Console Config
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When runtime output should be text-formatted through config data:
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```moonbit
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let sink = SinkConfig::new(
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kind=SinkKind::TextConsole,
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text_formatter=TextFormatterConfig::new(show_timestamp=false),
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)
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```
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In this example, the formatter choice is embedded directly into sink config.
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#### When Build A File Sink Config
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When file behavior should be data-driven:
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```moonbit
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let sink = SinkConfig::new(
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kind=SinkKind::File,
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path="app.log",
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rotation=Some(file_rotation(1024, max_backups=2)),
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)
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```
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In this example, file location and retention policy are part of the same sink definition.
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### Error Case
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e.g.:
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- If `kind=File` but `path` is empty, the config object is still constructible, but runtime usage should be evaluated carefully.
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- If `kind` is non-file, file-specific options may simply be unused by the runtime builder.
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### Notes
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1. This constructor builds sink-shape configuration, not the runtime sink itself.
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2. Use `sink_config_to_json(...)` and `stringify_sink_config(...)` for export.
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