fix(classes): 修复依赖注入与 ESM 导入路径

- classes.module.ts: 移除 useFactory，改用直接 provider 注册

- classes.service.ts: 添加 @Inject 装饰器显式注入 Repository

- health.module.ts: 修复 import 添加 .js 后缀（ESM 模式）

- package.json: 补充 ioredis/kafkajs/typeform 等运行时依赖

pnpm-lock.yaml

@@ -111,6 +111,12 @@ importers:
       drizzle-orm:
         specifier: ^0.31.0
         version: 0.31.4(@opentelemetry/api@1.9.1)(@types/better-sqlite3@7.6.13)(@types/pg@8.6.1)(@types/react@18.3.31)(better-sqlite3@11.10.0)(mysql2@3.22.6(@types/node@22.20.0))(react@18.3.1)
+      ioredis:
+        specifier: ^5.11.1
+        version: 5.11.1
+      kafkajs:
+        specifier: ^2.2.0
+        version: 2.2.4
       mysql2:
         specifier: ^3.11.0
         version: 3.22.6(@types/node@22.20.0)
@@ -129,6 +135,9 @@ importers:
       rxjs:
         specifier: ^7.8.0
         version: 7.8.2
+      typeorm:
+        specifier: ^1.0.0
+        version: 1.0.0(ioredis@5.11.1)(mysql2@3.22.6(@types/node@22.20.0))
       uuid:
         specifier: ^10.0.0
         version: 10.0.0
@@ -1271,6 +1280,9 @@ packages:
     resolution: {integrity: sha512-bV0Tgo9K4hfPCek+aMAn81RppFKv2ySDQeMoSZuvTASywNTnVJCArCZE2FWqpvIatKu7VMRLWlR1EazvVhDyhQ==}
     engines: {node: '>=18.18'}
 
+  '@ioredis/commands@1.10.0':
+    resolution: {integrity: sha512-UmeW7z4LfctwoQ5wkhVzgq8tXkreED2xZGpX+Bg+zA+WJFZCT6c062AfCK/Dfk81xZnnwdhJCUMkitihRaoC2Q==}
+
   '@isaacs/cliui@8.0.2':
     resolution: {integrity: sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==}
     engines: {node: '>=12'}
@@ -2206,6 +2218,9 @@ packages:
     cpu: [x64]
     os: [win32]
 
+  '@sqltools/formatter@1.2.5':
+    resolution: {integrity: sha512-Uy0+khmZqUrUGm5dmMqVlnvufZRSK0FbYzVgp0UMstm+F5+W2/jnEEQyc9vo1ZR/E5ZI/B1WjjoTqBqwJL6Krw==}
+
   '@swc/counter@0.1.3':
     resolution: {integrity: sha512-e2BR4lsJkkRlKZ/qCHPw9ZaSxc0MVUd7gtbtaB7aMvHeJVYe8sOB8DBZkP2DtISHGSku9sCK6T6cnY0CtXrOCQ==}
 
@@ -2520,6 +2535,10 @@ packages:
     resolution: {integrity: sha512-4Dj6M28JB+oAH8kFkTLUo+a2jwOFkuqb3yucU0CANcRRUbxS0cP0nZYCGjcc3BNXwRIsUVmDGgzawme7zvJHvg==}
     engines: {node: '>=12'}
 
+  ansis@4.3.1:
+    resolution: {integrity: sha512-BJ8/l4R5LRE7hW9WdSuGYrLSHi2ynxeFpDFbH0K/CgNeY/tyhk+vO6TYxXC5r5CpUhNVX310xzPsN/H9lCdfOA==}
+    engines: {node: '>=14'}
+
   any-promise@1.3.0:
     resolution: {integrity: sha512-7UvmKalWRt1wgjL1RrGxoSJW/0QZFIegpeGvZG9kjp8vrRu55XTHbwnqq2GpXm9uLbcuhxm3IqX9OB4MZR1b2A==}
 
@@ -2764,10 +2783,18 @@ packages:
     resolution: {integrity: sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==}
     engines: {node: '>=12'}
 
+  cliui@9.0.1:
+    resolution: {integrity: sha512-k7ndgKhwoQveBL+/1tqGJYNz097I7WOvwbmmU2AR5+magtbjPWQTS1C5vzGkBC8Ym8UWRzfKUzUUqFLypY4Q+w==}
+    engines: {node: '>=20'}
+
   clone@1.0.4:
     resolution: {integrity: sha512-JQHZ2QMW6l3aH/j6xCqQThY/9OH4D/9ls34cgkUBiEeocRTU04tHfKPBsUK1PqZCUQM7GiA0IIXJSuXHI64Kbg==}
     engines: {node: '>=0.8'}
 
+  cluster-key-slot@1.1.1:
+    resolution: {integrity: sha512-rwHwUfXL40Chm1r08yrhU3qpUvdVlgkKNeyeGPOxnW8/SyVDvgRaed/Uz54AqWNaTCAThlj6QAs3TZcKI0xDEw==}
+    engines: {node: '>=0.10.0'}
+
   code-block-writer@13.0.3:
     resolution: {integrity: sha512-Oofo0pq3IKnsFtuHqSF7TqBfr71aeyZDVJ0HpmqB7FBM2qEigL0iPONSCZSO9pE9dZTAxANe5XHG9Uy0YMv8cg==}
 
@@ -2909,6 +2936,9 @@ packages:
   dateformat@4.6.3:
     resolution: {integrity: sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==}
 
+  dayjs@1.11.21:
+    resolution: {integrity: sha512-98IT+HOahAisibz/yjKbzuOBwYcjJ7BCLPzARyHiyEBmRz4fatF+KPJszEHXsGYjUG234aH/cOjW1wwTbKUZlA==}
+
   debug@2.6.9:
     resolution: {integrity: sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==}
     peerDependencies:
@@ -2930,6 +2960,14 @@ packages:
     resolution: {integrity: sha512-aW35yZM6Bb/4oJlZncMH2LCoZtJXTRxES17vE3hoRiowU2kWHaJKFkSBDnDR+cm9J+9QhXmREyIfv0pji9ejCQ==}
     engines: {node: '>=10'}
 
+  dedent@1.7.2:
+    resolution: {integrity: sha512-WzMx3mW98SN+zn3hgemf4OzdmyNhhhKz5Ay0pUfQiMQ3e1g+xmTJWp/pKdwKVXhdSkAEGIIzqeuWrL3mV/AXbA==}
+    peerDependencies:
+      babel-plugin-macros: ^3.1.0
+    peerDependenciesMeta:
+      babel-plugin-macros:
+        optional: true
+
   deep-eql@5.0.2:
     resolution: {integrity: sha512-h5k/5U50IJJFpzfL6nO9jaaumfjO/f2NjK/oYB2Djzm4p9L+3T9qWpZqZ2hAbLPuuYq9wrU08WQyBTL5GbPk5Q==}
     engines: {node: '>=6'}
@@ -3595,6 +3633,10 @@ packages:
     resolution: {integrity: sha512-vI2w4zl/mDluHt9YEQ/543VTCwPKWiHzKtm9dM2V0NdFcqEexDAjUHzO1oA60HRNaVifGXXM1tRRNluLVHa0Kg==}
     engines: {node: '>=18'}
 
+  ioredis@5.11.1:
+    resolution: {integrity: sha512-ehuGcf94bQXhfagULNXrJdfnWO38v070jxSx/qE87Kjzmu2fU7ro5EFAb+OPituLqgfyuQaym5DlrNydW2sJ9A==}
+    engines: {node: '>=12.22.0'}
+
   ipaddr.js@1.9.1:
     resolution: {integrity: sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==}
     engines: {node: '>= 0.10'}
@@ -4459,6 +4501,14 @@ packages:
     resolution: {integrity: sha512-57frrGM/OCTLqLOAh0mhVA9VBMHd+9U7Zb2THMGdBUoZVOtGbJzjxsYGDJ3A9AYYCP4hn6y1TVbaOfzWtm5GFg==}
     engines: {node: '>= 12.13.0'}
 
+  redis-errors@1.2.0:
+    resolution: {integrity: sha512-1qny3OExCf0UvUV/5wpYKf2YwPcOqXzkwKKSmKHiE6ZMQs5heeE/c8eXK+PNllPvmjgAbfnsbpkGZWy8cBpn9w==}
+    engines: {node: '>=4'}
+
+  redis-parser@3.0.0:
+    resolution: {integrity: sha512-DJnGAeenTdpMEH6uAJRK/uiyEIH9WVsUmoLwzudwGJUwZPp80PDBWPHXSAGNPwNvIXAbe7MSUB1zQFugFml66A==}
+    engines: {node: '>=4'}
+
   reflect-metadata@0.2.2:
     resolution: {integrity: sha512-urBwgfrvVP/eAyXx4hluJivBKzuEbSQs9rKWCrCkbSxNv8mxPcUZKeuoF3Uy4mJl3Lwprp6yy5/39VWigZ4K6Q==}
 
@@ -4667,9 +4717,16 @@ packages:
     resolution: {integrity: sha512-Ti/Zx9J3aITMYUMFhCKbkplQjyi7Kk2SyYXp+rzrkyKZetIy19XbQtVZ+0ZR5aVm/178tIJ6+aVvBqXkH+Xs7w==}
     engines: {bun: '>=1.0.0', deno: '>=2.0.0', node: '>=12.0.0'}
 
+  sql-highlight@6.1.0:
+    resolution: {integrity: sha512-ed7OK4e9ywpE7pgRMkMQmZDPKSVdm0oX5IEtZiKnFucSF0zu6c80GZBe38UqHuVhTWJ9xsKgSMjCG2bml86KvA==}
+    engines: {node: '>=14'}
+
   stackback@0.0.2:
     resolution: {integrity: sha512-1XMJE5fQo1jGH6Y/7ebnwPOBEkIEnT4QF32d5R1+VXdXveM0IBMJt8zfaxX1P3QhVwrYe+576+jkANtSS2mBbw==}
 
+  standard-as-callback@2.1.0:
+    resolution: {integrity: sha512-qoRRSyROncaz1z0mvYqIE4lCd9p2R90i6GxW3uZv5ucSu8tU7B5HXUP1gG8pVZsYNVaXjk8ClXHPttLyxAL48A==}
+
   statuses@2.0.2:
     resolution: {integrity: sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==}
     engines: {node: '>= 0.8'}
@@ -4947,6 +5004,58 @@ packages:
   typedarray@0.0.6:
     resolution: {integrity: sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==}
 
+  typeorm@1.0.0:
+    resolution: {integrity: sha512-2mSKNqucP8vo+xQLP59xlHUcqLvG6qajxA7q7tnhJgeZjTrA6lK/Ar7LRyiAxdXhyXmGbIPsArPmcUB9Xg+M7w==}
+    engines: {node: ^20.19.0 || ^22.13.0 || >=24.11.0}
+    hasBin: true
+    peerDependencies:
+      '@google-cloud/spanner': ^8.0.0
+      '@sap/hana-client': ^2.14.22
+      better-sqlite3: ^12.0.0
+      ioredis: ^5.0.4
+      mongodb: ^7.0.0
+      mssql: ^12.0.0
+      mysql2: ^3.15.3
+      oracledb: ^6.3.0
+      pg: ^8.5.1
+      pg-native: ^3.0.0
+      pg-query-stream: ^4.0.0
+      redis: ^5.0.0
+      sql.js: ^1.4.0
+      ts-node: ^10.9.2
+      typeorm-aurora-data-api-driver: ^3.0.0
+    peerDependenciesMeta:
+      '@google-cloud/spanner':
+        optional: true
+      '@sap/hana-client':
+        optional: true
+      better-sqlite3:
+        optional: true
+      ioredis:
+        optional: true
+      mongodb:
+        optional: true
+      mssql:
+        optional: true
+      mysql2:
+        optional: true
+      oracledb:
+        optional: true
+      pg:
+        optional: true
+      pg-native:
+        optional: true
+      pg-query-stream:
+        optional: true
+      redis:
+        optional: true
+      sql.js:
+        optional: true
+      ts-node:
+        optional: true
+      typeorm-aurora-data-api-driver:
+        optional: true
+
   typescript@5.7.2:
     resolution: {integrity: sha512-i5t66RHxDvVN40HfDd1PsEThGNnlMCMT3jMUuoh9/0TaqWevNontacunWyN02LA9/fIbEWlcHZcgTKb9QoaLfg==}
     engines: {node: '>=14.17'}
@@ -5171,10 +5280,18 @@ packages:
     resolution: {integrity: sha512-tVpsJW7DdjecAiFpbIB1e3qxIQsE6NoPc5/eTdrbbIC4h0LVsWhnoa3g+m2HclBIujHzsxZ4VJVA+GUuc2/LBw==}
     engines: {node: '>=12'}
 
+  yargs-parser@22.0.0:
+    resolution: {integrity: sha512-rwu/ClNdSMpkSrUb+d6BRsSkLUq1fmfsY6TOpYzTwvwkg1/NRG85KBy3kq++A8LKQwX6lsu+aWad+2khvuXrqw==}
+    engines: {node: ^20.19.0 || ^22.12.0 || >=23}
+
   yargs@17.7.3:
     resolution: {integrity: sha512-GZtjxm/J/4TSxuL3FNYjCmLktBTnIw/rVmKSIyKeYAZpmJB2ig9VauCC5xsa82GNKVKDAqpOn3KVzNt0zmrU0g==}
     engines: {node: '>=12'}
 
+  yargs@18.0.0:
+    resolution: {integrity: sha512-4UEqdc2RYGHZc7Doyqkrqiln3p9X2DZVxaGbwhn2pi7MrRagKaOcIKe8L3OxYcbhXLgLFUS3zAYuQjKBQgmuNg==}
+    engines: {node: ^20.19.0 || ^22.12.0 || >=23}
+
   yocto-queue@0.1.0:
     resolution: {integrity: sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q==}
     engines: {node: '>=10'}
@@ -5753,6 +5870,8 @@ snapshots:
 
   '@humanwhocodes/retry@0.4.3': {}
 
+  '@ioredis/commands@1.10.0': {}
+
   '@isaacs/cliui@8.0.2':
     dependencies:
       string-width: 5.1.2
@@ -6928,6 +7047,8 @@ snapshots:
   '@rollup/rollup-win32-x64-msvc@4.62.2':
     optional: true
 
+  '@sqltools/formatter@1.2.5': {}
+
   '@swc/counter@0.1.3': {}
 
   '@swc/helpers@0.5.23':
@@ -7323,6 +7444,8 @@ snapshots:
 
   ansi-styles@6.2.3: {}
 
+  ansis@4.3.1: {}
+
   any-promise@1.3.0: {}
 
   anymatch@3.1.3:
@@ -7580,8 +7703,16 @@ snapshots:
       strip-ansi: 6.0.1
       wrap-ansi: 7.0.0
 
+  cliui@9.0.1:
+    dependencies:
+      string-width: 7.2.0
+      strip-ansi: 7.2.0
+      wrap-ansi: 9.0.2
+
   clone@1.0.4: {}
 
+  cluster-key-slot@1.1.1: {}
+
   code-block-writer@13.0.3: {}
 
   color-convert@2.0.1:
@@ -7711,6 +7842,8 @@ snapshots:
 
   dateformat@4.6.3: {}
 
+  dayjs@1.11.21: {}
+
   debug@2.6.9:
     dependencies:
       ms: 2.0.0
@@ -7723,6 +7856,8 @@ snapshots:
     dependencies:
       mimic-response: 3.1.0
 
+  dedent@1.7.2: {}
+
   deep-eql@5.0.2: {}
 
   deep-extend@0.6.0: {}
@@ -8487,6 +8622,18 @@ snapshots:
       strip-ansi: 6.0.1
       wrap-ansi: 6.2.0
 
+  ioredis@5.11.1:
+    dependencies:
+      '@ioredis/commands': 1.10.0
+      cluster-key-slot: 1.1.1
+      debug: 4.4.3
+      denque: 2.1.0
+      redis-errors: 1.2.0
+      redis-parser: 3.0.0
+      standard-as-callback: 2.1.0
+    transitivePeerDependencies:
+      - supports-color
+
   ipaddr.js@1.9.1: {}
 
   is-arrayish@0.2.1: {}
@@ -9313,6 +9460,12 @@ snapshots:
 
   real-require@0.2.0: {}
 
+  redis-errors@1.2.0: {}
+
+  redis-parser@3.0.0:
+    dependencies:
+      redis-errors: 1.2.0
+
   reflect-metadata@0.2.2: {}
 
   repeat-string@1.6.1: {}
@@ -9557,8 +9710,12 @@ snapshots:
 
   sql-escaper@1.4.0: {}
 
+  sql-highlight@6.1.0: {}
+
   stackback@0.0.2: {}
 
+  standard-as-callback@2.1.0: {}
+
   statuses@2.0.2: {}
 
   std-env@3.10.0: {}
@@ -9828,6 +9985,25 @@ snapshots:
 
   typedarray@0.0.6: {}
 
+  typeorm@1.0.0(ioredis@5.11.1)(mysql2@3.22.6(@types/node@22.20.0)):
+    dependencies:
+      '@sqltools/formatter': 1.2.5
+      ansis: 4.3.1
+      dayjs: 1.11.21
+      debug: 4.4.3
+      dedent: 1.7.2
+      reflect-metadata: 0.2.2
+      sql-highlight: 6.1.0
+      tinyglobby: 0.2.17
+      tslib: 2.8.1
+      yargs: 18.0.0
+    optionalDependencies:
+      ioredis: 5.11.1
+      mysql2: 3.22.6(@types/node@22.20.0)
+    transitivePeerDependencies:
+      - babel-plugin-macros
+      - supports-color
+
   typescript@5.7.2: {}
 
   typescript@5.9.3: {}
@@ -10085,6 +10261,8 @@ snapshots:
 
   yargs-parser@21.1.1: {}
 
+  yargs-parser@22.0.0: {}
+
   yargs@17.7.3:
     dependencies:
       cliui: 8.0.1
@@ -10095,6 +10273,15 @@ snapshots:
       y18n: 5.0.8
       yargs-parser: 21.1.1
 
+  yargs@18.0.0:
+    dependencies:
+      cliui: 9.0.1
+      escalade: 3.2.0
+      get-caller-file: 2.0.5
+      string-width: 7.2.0
+      y18n: 5.0.8
+      yargs-parser: 22.0.0
+
   yocto-queue@0.1.0: {}
 
   yocto-queue@1.2.2: {}

services/classes/package.json

@@ -17,19 +17,22 @@
     "@nestjs/common": "^10.4.0",
     "@nestjs/core": "^10.4.0",
     "@nestjs/platform-express": "^10.4.0",
+    "@opentelemetry/api": "^1.9.0",
+    "@opentelemetry/auto-instrumentations-node": "^0.50.0",
+    "@opentelemetry/exporter-trace-otlp-http": "^0.53.0",
+    "@opentelemetry/sdk-node": "^0.53.0",
     "drizzle-orm": "^0.31.0",
+    "ioredis": "^5.11.1",
+    "kafkajs": "^2.2.0",
     "mysql2": "^3.11.0",
     "pino": "^9.4.0",
     "pino-http": "^10.0.0",
     "prom-client": "^15.1.0",
-    "@opentelemetry/api": "^1.9.0",
-    "@opentelemetry/sdk-node": "^0.53.0",
-    "@opentelemetry/auto-instrumentations-node": "^0.50.0",
-    "@opentelemetry/exporter-trace-otlp-http": "^0.53.0",
-    "zod": "^3.23.0",
-    "uuid": "^10.0.0",
     "reflect-metadata": "^0.2.2",
-    "rxjs": "^7.8.0"
+    "rxjs": "^7.8.0",
+    "typeorm": "^1.0.0",
+    "uuid": "^10.0.0",
+    "zod": "^3.23.0"
   },
   "devDependencies": {
     "@nestjs/cli": "^10.4.0",
@@ -41,8 +44,8 @@
     "drizzle-kit": "^0.24.0",
     "eslint": "^9.10.0",
     "pino-pretty": "^11.2.0",
+    "tsx": "^4.19.0",
     "typescript": "^5.6.0",
-    "vitest": "^2.1.0",
+    "vitest": "^2.1.0"
-    "tsx": "^4.19.0"
   }
 }

services/classes/src/classes/classes.module.ts

@@ -1,16 +1,10 @@
-import { Module } from '@nestjs/common';
+import { Module } from "@nestjs/common";
-import { ClassesController } from './classes.controller.js';
+import { ClassesController } from "./classes.controller.js";
-import { ClassesService } from './classes.service.js';
+import { ClassesService } from "./classes.service.js";
-import { ClassesRepository } from './classes.repository.js';
+import { ClassesRepository } from "./classes.repository.js";
 
 @Module({
   controllers: [ClassesController],
-  providers: [
+  providers: [ClassesService, ClassesRepository],
-    ClassesService,
-    {
-      provide: ClassesRepository,
-      useFactory: () => new ClassesRepository(),
-    },
-  ],
 })
 export class ClassesModule {}

services/classes/src/classes/classes.service.ts

@@ -1,11 +1,17 @@
-import { v4 as uuidv4 } from 'uuid';
+import { v4 as uuidv4 } from "uuid";
-import { ClassesRepository } from './classes.repository.js';
+import { Inject } from "@nestjs/common";
-import { ValidationError, NotFoundError } from '../shared/errors/application-error.js';
+import { ClassesRepository } from "./classes.repository.js";
-import type { CreateClassDto, UpdateClassDto } from './classes.dto.js';
+import {
-import type { Class, NewClass } from './classes.schema.js';
+  ValidationError,
+  NotFoundError,
+} from "../shared/errors/application-error.js";
+import type { CreateClassDto, UpdateClassDto } from "./classes.dto.js";
+import type { Class, NewClass } from "./classes.schema.js";
 
 export class ClassesService {
-  constructor(private readonly repository: ClassesRepository) {}
+  constructor(
+    @Inject(ClassesRepository) private readonly repository: ClassesRepository,
+  ) {}
 
   async create(dto: CreateClassDto): Promise<Class> {
     const newClass: NewClass = {
@@ -18,7 +24,7 @@ export class ClassesService {
   async getById(id: string): Promise<Class> {
     const result = await this.repository.findById(id);
     if (!result) {
-      throw new NotFoundError('Class', id);
+      throw new NotFoundError("Class", id);
     }
     return result;
   }
@@ -29,11 +35,11 @@ export class ClassesService {
 
   async update(id: string, dto: UpdateClassDto): Promise<Class> {
     if (Object.keys(dto).length === 0) {
-      throw new ValidationError('No fields to update');
+      throw new ValidationError("No fields to update");
     }
     const result = await this.repository.update(id, dto);
     if (!result) {
-      throw new NotFoundError('Class', id);
+      throw new NotFoundError("Class", id);
     }
     return result;
   }
@@ -41,7 +47,7 @@ export class ClassesService {
   async delete(id: string): Promise<void> {
     const existing = await this.repository.findById(id);
     if (!existing) {
-      throw new NotFoundError('Class', id);
+      throw new NotFoundError("Class", id);
     }
     await this.repository.delete(id);
   }

services/classes/src/shared/health/health.module.ts

@@ -1,5 +1,5 @@
-import { Module } from '@nestjs/common';
+import { Module } from "@nestjs/common";
-import { HealthController } from './health.controller';
+import { HealthController } from "./health.controller.js";
 
 /**
  * 健康检查模块。