55 lines
1.8 KiB
TypeScript
55 lines
1.8 KiB
TypeScript
import { Inject, Injectable } from '@nestjs/common';
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import type {
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DependencyHealthDto,
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HealthResponseDto,
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} from '../../../libs/http-contracts/src/health.dto';
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/** 依赖注入令牌避免健康服务耦合 ioredis 或 mysql2 客户端。 */
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export const REDIS_HEALTH_PORT = Symbol('REDIS_HEALTH_PORT');
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export const MYSQL_HEALTH_PORT = Symbol('MYSQL_HEALTH_PORT');
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/** 健康端口只要求只读检查，便于禁用态和测试实现遵循同一契约。 */
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export interface DependencyHealthPort {
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check(): Promise<DependencyHealthDto>;
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}
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@Injectable()
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/** 聚合依赖状态并统一清洗底层错误，禁止连接信息进入 HTTP 响应。 */
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export class HealthService {
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constructor(
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@Inject(REDIS_HEALTH_PORT) private readonly redis: DependencyHealthPort,
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@Inject(MYSQL_HEALTH_PORT) private readonly mysql: DependencyHealthPort,
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) {}
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async check(): Promise<HealthResponseDto> {
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const [redis, mysql] = await Promise.all([
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this.checkSafely(this.redis),
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this.checkSafely(this.mysql),
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]);
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const status =
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redis.status === 'healthy' && mysql.status !== 'unavailable' ? 'healthy' : 'unavailable';
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return {
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status,
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process: 'api',
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checkedAt: new Date().toISOString(),
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dependencies: {
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redis,
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mysql,
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rocketMq: { status: 'disabled', detail: 'GOV-009 尚未启用 RocketMQ 客户端' },
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},
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};
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}
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private async checkSafely(port: DependencyHealthPort): Promise<DependencyHealthDto> {
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try {
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const result = await port.check();
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if (result.status === 'healthy' || result.status === 'disabled') return result;
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} catch {
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// 外部错误可能包含 DSN、用户名或密码；HTTP 健康响应只暴露固定安全文案。
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}
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return { status: 'unavailable', detail: '依赖检查失败' };
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}
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}
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