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docs/api/parse-async-logger-config-text.md

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+---
+name: parse-async-logger-config-text
+group: api
+category: async
+update-time: 20260520
+description: Parse JSON text into an AsyncLoggerConfig.
+key-word:
+    - async
+    - config
+    - parse
+    - public
+---
+
+## Parse-async-logger-config-text
+
+Parse raw JSON text into `AsyncLoggerConfig`. This helper is the text-entry counterpart to `AsyncLoggerConfig::new(...)` when async queue and flush policy should be configured from serialized data.
+
+### Interface
+
+```moonbit
+pub fn parse_async_logger_config_text(input : String) -> AsyncLoggerConfig raise {
+```
+
+#### input
+
+- `input : String` - Raw JSON text describing async queue, batching, linger, and flush settings.
+
+#### output
+
+- `AsyncLoggerConfig` - Parsed async runtime config value.
+
+### Explanation
+
+Detailed rules explaining key parameters and behaviors
+
+- This helper parses only the async config portion, not the embedded sync `LoggerConfig`.
+- Parsed values follow the same normalization and enum validation rules as other async config helpers.
+- Use this API when async policy comes from config text but sink choice is still assembled elsewhere.
+
+### How to Use
+
+Here are some specific examples provided.
+
+#### When Need Async Queue Policy From JSON
+
+When async queue behavior is loaded separately from sync sink config:
+```moonbit
+let config = parse_async_logger_config_text(
+  "{\"max_pending\":8,\"overflow\":\"DropOldest\",\"max_batch\":3,\"linger_ms\":25,\"flush\":\"Batch\"}",
+)
+```
+
+In this example, async queue and flush policy are parsed from text into a typed config object.
+
+### Error Case
+
+e.g.:
+- If the JSON text is malformed, parsing raises an error.
+
+- If enum names such as `overflow` or `flush` are unsupported, parsing raises an error.
+
+### Notes
+
+1. Use this helper when only async policy is text-driven.
+
+2. Use `parse_async_logger_build_config_text(...)` when both sync logger config and async config come from the same JSON payload.