Module logger 

Available on crate feature logger only.

Provide logger feature. The inner library uses tracing. See their documents for how to log in the program.

This wrapper makes it thread safe, even for FFI libraries. You can use it everywhere and freely.

Structs

LogItem

One structured log entry, handed to the writers (and filter/transformer).

Logger

Handle to the running logger; clone and pass around (e.g. store in GlobalState) to re-init the subscriber or feed raw log maps from plugins.

LoggerBuilder

LoggerGuard

Keep this guard alive when you use the logger. No more logs will be record after dropping the guard.

Type Aliases

FilterFn

Filter callback: return false to drop a log entry before the transformer.

HandlerFn

Handler callback: invoked first on the raw JSON map; return false to stop further processing of the entry.

TransformerFn

Transformer callback: rewrite a log entry before writing.

WriterFn

Writer callback: render one LogItem to the given sink (stdout/stderr).