import * as express from 'express';
import { register } from 'prom-client';
import * as promClient from 'prom-client';
import { Logger } from '@w3f/logger';
export class Prometheus {
constructor(private readonly logger: Logger) {}
startCollection(): void {
this.logger.info(
'Starting the collection of metrics, the metrics are available on /metrics'
);
promClient.collectDefaultMetrics();
}
injectMetricsRoute(app: express.Application): void {
app.get('/metrics', (req: express.Request, res: express.Response) => {
res.set('Content-Type', register.contentType)
res.end(register.metrics())
})
}
}
