chore: rename fundamentals to base (#9119)

packages/backend/server/src/base/metrics/index.ts

@@ -0,0 +1,55 @@
+import './config';
+
+import {
+  Global,
+  Module,
+  OnModuleDestroy,
+  OnModuleInit,
+  Provider,
+} from '@nestjs/common';
+import { ModuleRef } from '@nestjs/core';
+import { NodeSDK } from '@opentelemetry/sdk-node';
+
+import { Config } from '../config';
+import {
+  LocalOpentelemetryFactory,
+  OpentelemetryFactory,
+  registerCustomMetrics,
+} from './opentelemetry';
+
+const factorProvider: Provider = {
+  provide: OpentelemetryFactory,
+  useFactory: (config: Config) => {
+    return config.metrics.enabled ? new LocalOpentelemetryFactory() : null;
+  },
+  inject: [Config],
+};
+
+@Global()
+@Module({
+  providers: [factorProvider],
+  exports: [factorProvider],
+})
+export class MetricsModule implements OnModuleInit, OnModuleDestroy {
+  private sdk: NodeSDK | null = null;
+  constructor(private readonly ref: ModuleRef) {}
+
+  onModuleInit() {
+    const factor = this.ref.get(OpentelemetryFactory, { strict: false });
+    if (factor) {
+      this.sdk = factor.create();
+      this.sdk.start();
+      registerCustomMetrics();
+    }
+  }
+
+  async onModuleDestroy() {
+    if (this.sdk) {
+      await this.sdk.shutdown();
+    }
+  }
+}
+
+export * from './metrics';
+export * from './utils';
+export { OpentelemetryFactory };