rlightning.utils.logger.handlers

class rlightning.utils.logger.handlers.MetricsHandler(backend: MetricsBackend)

Bases: Handler

A logging handler that routes metrics to configured backends.

close()

Tidy up any resources used by the handler.

This version removes the handler from an internal map of handlers, _handlers, which is used for handler lookup by name. Subclasses should ensure that this gets called from overridden close() methods.

emit(record: LogRecord)

Place metric payloads onto the queue for background processing.

This method is called by the logging system for each log record. It checks for a metric_payload attribute on the record and, if present, adds it to the processing queue.

Parameters:

record – The log record to process.

rlightning.utils.logger.handlers.build_metrics_backend(cfg: LogConfig) → MetricsBackend

Build a list of metrics backends based on the provided configuration.

Parameters:

cfg – The application’s configuration object.

Returns:

A list of initialized MetricsBackend instances.