@libp2p/prometheus-metrics/dist/src/metric.js

Collect libp2p metrics for scraping by Prometheus or Graphana

import { Gauge } from 'prom-client';
import { normalizeString } from './utils.js';
export class PrometheusMetric {
    gauge;
    constructor(name, opts) {
        name = normalizeString(name);
        const help = normalizeString(opts.help ?? name);
        const labels = opts.label != null ? [normalizeString(opts.label)] : [];
        let collect;
        // calculated metric
        if (opts?.calculate != null) {
            collect = async function () {
                this.set(await opts.calculate());
            };
        }
        this.gauge = new Gauge({
            name,
            help,
            labelNames: labels,
            registers: opts.registry !== undefined ? [opts.registry] : undefined,
            collect
        });
    }
    update(value) {
        this.gauge.set(value);
    }
    increment(value = 1) {
        this.gauge.inc(value);
    }
    decrement(value = 1) {
        this.gauge.dec(value);
    }
    reset() {
        this.gauge.reset();
    }
    timer() {
        return this.gauge.startTimer();
    }
}
//# sourceMappingURL=metric.js.map