it('supports static labels', done => {
const metric = new promClient.Counter({
name: 'test_counter',
help: 'help',
labelNames: ['label1', 'label2']
});
const rp = requestPlus()
.plus.wrap(promDecorator, {
metric: metric,
labels: {
label1: 'foo',
label2: 'bar'
}
});
nock('http://example.com')
.get('/prom-decorator')
.reply(200, 'ok');
rp('http://example.com/prom-decorator')
.then(() => {
const labels = metric.get().values[0].labels;
expect(labels.label1).toBe('foo');
expect(labels.label2).toBe('bar');
done();
})
.catch(done.fail);
});
async fetchPath(method, path, payload, accessToken) {
const options = this.getOptions(method, path, payload, accessToken)
const [response, body] = await request(options)
const {statusCode} = response || {}
CallCounter.inc({type: 'total'}, 1)
// 300 codes are for github membership checks
if ([200, 201, 202, 203, 204, 300, 301, 302].indexOf(statusCode) < 0) {
error(`${statusCode} ${method} ${path}`, response.body)
if (statusCode >= 400 && statusCode <= 499) {
CallCounter.inc({type: '4xx'}, 1)
} else if (statusCode >= 500 && statusCode <= 599) {
CallCounter.inc({ type: '5xx'}, 1)
}
throw new GithubServiceError(response)
}
else {
CallCounter.inc({type: 'success'}, 1)
return body
}
}
const server = http.createServer((req, res) => {
switch (req.url) {
case '/':
// Set label values and increase counter
counter.labels(req.url, req.method, 200).inc()
// A bit hacky, just for demo purposes!
const currentValue = counter.hashMap['method:GET,path:/,statusCode:200'].value
return res.end(`Website has been loaded ${currentValue} times since the webserver has been started.`)
case '/metrics':
// Expose service metrics
res.setHeader('Content-Type', prometheus.contentType)
return res.end(prometheus.register.metrics())
default:
res.statusCode = 404
// Set label values and increase counter
counter.labels(req.url, req.method, res.statusCode).inc()
return res.end()
}
})
.then(() => {
const labels = metric.get().values[0].labels;
expect(labels.label1).toBe('foo');
expect(labels.label2).toBe('bar');
done();
})