63 lines
2.2 KiB
TypeScript
63 lines
2.2 KiB
TypeScript
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import { Registry, Counter, Histogram, Gauge, collectDefaultMetrics } from 'prom-client';
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const registry = new Registry();
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// Collect default Node.js metrics (CPU, memory, event loop, etc.)
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collectDefaultMetrics({ register: registry });
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// ── HTTP Metrics ────────────────────────────────────────
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export const httpRequestCounter = new Counter({
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name: 'zeavis_api_http_requests_total',
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help: 'Total number of HTTP requests handled by the API',
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labelNames: ['method', 'path', 'status'] as const,
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registers: [registry],
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});
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export const httpRequestDuration = new Histogram({
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name: 'zeavis_api_http_request_duration_seconds',
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help: 'Histogram of HTTP request durations in seconds',
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labelNames: ['method', 'path'] as const,
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buckets: [0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5],
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registers: [registry],
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});
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export const httpRequestsActive = new Gauge({
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name: 'zeavis_api_http_requests_active',
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help: 'Number of HTTP requests currently being processed',
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registers: [registry],
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});
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// ── Business Metrics ────────────────────────────────────
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export const classificationCounter = new Counter({
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name: 'zeavis_api_classifications_total',
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help: 'Total number of classification predictions requested via API',
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labelNames: ['result'] as const,
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registers: [registry],
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});
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export const diagnosisCounter = new Counter({
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name: 'zeavis_api_diagnoses_total',
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help: 'Total number of diagnoses created',
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labelNames: ['disease'] as const,
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registers: [registry],
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});
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export const authCounter = new Counter({
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name: 'zeavis_api_auth_operations_total',
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help: 'Total authentication operations (login, register, refresh)',
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labelNames: ['operation', 'success'] as const,
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registers: [registry],
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});
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// ── Export ──────────────────────────────────────────────
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export function getMetricsContentType(): string {
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return registry.contentType;
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}
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export async function getMetrics(): Promise<string> {
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return await registry.metrics();
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}
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