IMQMetricsServerOptions.queueLengthFormatter property
Renders the response body from the current queue length and the metric name, which is always the literal 'queue_length'.
Signature:
queueLengthFormatter?: (length: number, metricName: string) => string;
Remarks
Defaults to a Prometheus-style rendering. A falsy return falls back to the bare number. Note that the queue length reports 0 while the queue's writer is disconnected.
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