2a392525a2
Add cache-aside pattern for listing detail, search results, market analytics (4 endpoints), and user profile queries. Cache invalidation on all write mutations. Prometheus cache_hit_total/cache_miss_total metrics with resource labels. - CacheService: getOrSet, invalidate, invalidateByPrefix (SCAN-based) - TTLs: listing 5m, search 1m, market 30m, profile 10m - All 230 tests passing (13 new cache tests + 6 updated handler tests) Co-Authored-By: Paperclip <noreply@paperclip.ing>
82 lines
2.3 KiB
TypeScript
82 lines
2.3 KiB
TypeScript
import { Module } from '@nestjs/common';
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import {
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PrometheusModule,
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makeCounterProvider,
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makeHistogramProvider,
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makeGaugeProvider,
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} from '@willsoto/nestjs-prometheus';
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@Module({
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imports: [
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PrometheusModule.register({
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path: '/metrics',
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defaultMetrics: { enabled: true },
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}),
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],
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providers: [
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// ── HTTP Metrics ──
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makeHistogramProvider({
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name: 'http_request_duration_seconds',
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help: 'Duration of HTTP requests in seconds',
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labelNames: ['method', 'route', 'status_code'],
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buckets: [0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10],
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}),
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makeCounterProvider({
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name: 'http_requests_total',
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help: 'Total number of HTTP requests',
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labelNames: ['method', 'route', 'status_code'],
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}),
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// ── Database Metrics ──
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makeHistogramProvider({
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name: 'db_query_duration_seconds',
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help: 'Duration of database queries in seconds',
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labelNames: ['operation', 'model'],
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buckets: [0.001, 0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5],
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}),
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makeGaugeProvider({
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name: 'db_pool_active_connections',
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help: 'Number of active database connections',
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}),
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// ── Search Metrics ──
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makeHistogramProvider({
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name: 'search_query_duration_seconds',
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help: 'Duration of search queries in seconds',
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labelNames: ['collection', 'type'],
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buckets: [0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1],
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}),
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// ── Cache Metrics ──
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makeCounterProvider({
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name: 'cache_hit_total',
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help: 'Total number of cache hits',
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labelNames: ['resource'],
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}),
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makeCounterProvider({
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name: 'cache_miss_total',
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help: 'Total number of cache misses',
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labelNames: ['resource'],
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}),
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// ── Business Metrics ──
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makeCounterProvider({
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name: 'listings_created_total',
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help: 'Total number of listings created',
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labelNames: ['category'],
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}),
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makeCounterProvider({
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name: 'payments_processed_total',
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help: 'Total number of payments processed',
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labelNames: ['status', 'method'],
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}),
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makeGaugeProvider({
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name: 'active_subscriptions',
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help: 'Number of active subscriptions',
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labelNames: ['plan'],
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}),
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],
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exports: [PrometheusModule],
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})
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export class MetricsModule {}
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