project setup with core files including configuration, package management, and basic structure. Added .gitignore, README, and various TypeScript types for CMS components. Implemented initial components and layouts for the application.

middlelayer/monitoring/metrics.ts

@@ -0,0 +1,90 @@
+import { Registry, Counter, Histogram, Gauge } from 'prom-client';
+
+/**
+ * Prometheus Metrics Registry
+ * Sammelt Metriken für Monitoring und Alerting
+ */
+export const register = new Registry();
+
+// Default Metrics (CPU, Memory, etc.)
+register.setDefaultLabels({
+  app: 'graphql-middlelayer',
+});
+
+// Query Metrics
+export const queryCounter = new Counter({
+  name: 'graphql_queries_total',
+  help: 'Total number of GraphQL queries',
+  labelNames: ['operation', 'status'],
+  registers: [register],
+});
+
+export const queryDuration = new Histogram({
+  name: 'graphql_query_duration_seconds',
+  help: 'Duration of GraphQL queries in seconds',
+  labelNames: ['operation'],
+  buckets: [0.01, 0.05, 0.1, 0.5, 1, 2, 5],
+  registers: [register],
+});
+
+// Cache Metrics
+export const cacheHits = new Counter({
+  name: 'cache_hits_total',
+  help: 'Total number of cache hits',
+  labelNames: ['cache_type'],
+  registers: [register],
+});
+
+export const cacheMisses = new Counter({
+  name: 'cache_misses_total',
+  help: 'Total number of cache misses',
+  labelNames: ['cache_type'],
+  registers: [register],
+});
+
+// DataService Metrics
+export const dataServiceCalls = new Counter({
+  name: 'dataservice_calls_total',
+  help: 'Total number of DataService calls',
+  labelNames: ['method', 'status'],
+  registers: [register],
+});
+
+export const dataServiceDuration = new Histogram({
+  name: 'dataservice_duration_seconds',
+  help: 'Duration of DataService calls in seconds',
+  labelNames: ['method'],
+  buckets: [0.001, 0.005, 0.01, 0.05, 0.1, 0.5, 1],
+  registers: [register],
+});
+
+// Error Metrics
+export const errorCounter = new Counter({
+  name: 'errors_total',
+  help: 'Total number of errors',
+  labelNames: ['type', 'operation'],
+  registers: [register],
+});
+
+// Active Connections
+export const activeConnections = new Gauge({
+  name: 'active_connections',
+  help: 'Number of active connections',
+  registers: [register],
+});
+
+// Query Complexity
+export const queryComplexityGauge = new Gauge({
+  name: 'graphql_query_complexity',
+  help: 'Complexity of GraphQL queries',
+  labelNames: ['operation'],
+  registers: [register],
+});
+
+/**
+ * Exportiert Metriken im Prometheus-Format
+ */
+export async function getMetrics(): Promise<string> {
+  return register.metrics();
+}
+