66 lines
2.4 KiB
TypeScript
66 lines
2.4 KiB
TypeScript
// teacher-bff 入口（B1 裁决：P2 起 GraphQL Yoga）
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// 优雅关闭顺序（G9）：HTTP → Redis → gRPC → Tracer
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import "reflect-metadata";
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import { NestFactory } from "@nestjs/core";
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import type { NestExpressApplication } from "@nestjs/platform-express";
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import type { Application, Request, Response } from "express";
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import { AppModule } from "./app.module.js";
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import { GlobalErrorFilter } from "./shared/errors/global-error.filter.js";
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import { initTracer, shutdownTracer } from "./shared/observability/tracer.js";
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import { logger } from "./shared/observability/logger.js";
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import { env } from "./config/env.js";
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import { metricsRegistry } from "./shared/observability/metrics.js";
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import { closeAllGrpcClients } from "./clients/grpc/grpc.factory.js";
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async function bootstrap(): Promise<void> {
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initTracer();
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const app = await NestFactory.create<NestExpressApplication>(AppModule, {
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logger: ["log", "error", "warn"],
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});
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app.useGlobalFilters(new GlobalErrorFilter());
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app.enableShutdownHooks();
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// Prometheus 指标端点：不鉴权，供 Prometheus 抓取
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// 直接获取 Express 实例注册路由，避免 HttpAdapter 泛型类型不兼容
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const expressApp = app.getHttpAdapter().getInstance() as Application;
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expressApp.get("/metrics", async (_req: Request, res: Response) => {
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res.set("Content-Type", metricsRegistry.contentType);
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res.end(await metricsRegistry.metrics());
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});
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await app.listen(env.PORT);
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logger.info(
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{
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port: env.PORT,
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graphql: env.GRAPHQL_PATH,
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devMode: env.TEACHER_BFF_DEV_MODE,
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iamTarget: env.IAM_GRPC_TARGET,
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},
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"Teacher BFF started (GraphQL + gRPC downstream)",
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);
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// 优雅关闭（G9：HTTP → Redis → gRPC → Tracer）
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const shutdown = async (signal: string) => {
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logger.info({ signal }, "Shutting down Teacher BFF");
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try {
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await app.close(); // 触发 OnModuleDestroy（Redis quit）
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closeAllGrpcClients(); // 关闭所有 gRPC channel
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await shutdownTracer();
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logger.info("Teacher BFF shutdown complete");
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} catch (err) {
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logger.error({ err }, "Error during shutdown");
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process.exit(1);
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}
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};
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process.on("SIGTERM", () => void shutdown("SIGTERM"));
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process.on("SIGINT", () => void shutdown("SIGINT"));
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}
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bootstrap().catch((err: unknown) => {
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logger.error({ err }, "Failed to start Teacher BFF");
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process.exit(1);
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});
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