197 lines
16 KiB
Markdown
197 lines
16 KiB
Markdown
# msg 对接契约
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> 负责人:ai10
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> 关联:[matrix.md](../matrix.md)、[msg.proto](../../../packages/shared-proto/proto/msg.proto)、[events.proto](../../../packages/shared-proto/proto/events.proto)、[02-architecture-design.md](../../../services/msg/docs/02-architecture-design.md)
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> 仲裁依赖:ISSUE-008(topic 命名)、ISSUE-009(RPC 数量)、ISSUE-013(events.proto 补齐)
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---
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## §1 我提供什么(对外接口)
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### 1.1 gRPC 接口
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> 端口:50056 | proto 包名:`next_edu_cloud.msg.v1` | proto 文件:[msg.proto](../../../packages/shared-proto/proto/msg.proto)
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>
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> **⚠️ ISSUE-009 待仲裁**:ai-allocation.md 规定 13 RPC,02-architecture-design.md 设计 17 RPC。下表列出设计文档完整 17 RPC,标注基线 13 RPC(✅基线 / ➕扩展待仲裁)。coord 裁决后裁剪或放宽。
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#### NotificationService(9 RPC:5 基线 + 4 扩展)
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| RPC | 请求 | 响应 | 基线/扩展 | 说明 |
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| --------------------- | ---------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------- | --------- | ----------------- |
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| SendNotification | `SendNotificationRequest{user_id, type, title, content, channel, metadata?, related_entity_type?, related_entity_id?}` | `Notification` | ✅基线 | 单条发送 |
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| BatchSendNotification | `BatchSendNotificationRequest{items[], group_id?}` | `BatchSendNotificationResponse{ids[], failed[]}` | ➕扩展 | 批量发送 |
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| ListNotifications | `ListNotificationsRequest{user_id, only_unread?, type?, page?, page_size?}` | `ListNotificationsResponse{notifications[], total}` | ✅基线 | 列表(补分页) |
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| GetUnreadCount | `GetUnreadCountRequest{user_id}` | `GetUnreadCountResponse{count}` | ➕扩展 | 未读数(Redis) |
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| MarkAsRead | `MarkAsReadRequest{id, user_id}` | `Empty` | ✅基线 | 标记已读 |
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| BatchMarkAsRead | `BatchMarkAsReadRequest{ids[], user_id}` | `Empty` | ➕扩展 | 批量已读 |
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| MarkAllAsRead | `MarkAllAsReadRequest{user_id, before?}` | `Empty` | ➕扩展 | 全部已读 |
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| SearchNotifications | `SearchNotificationsRequest{user_id, query, type?, page?, page_size?}` | `SearchNotificationsResponse{notifications[], total}` | ✅基线 | ES 全文检索 |
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| RecallNotification | `RecallNotificationRequest{group_id, reason?}` | `RecallNotificationResponse{recalled_count}` | ✅基线 | 撤回广播 |
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#### NotificationPreferenceService(2 RPC 基线)
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| RPC | 请求 | 响应 | 基线/扩展 | 说明 |
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| ------------------ | -------------------------------------------------- | --------------------------------------- | --------- | -------- |
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| GetPreferences | `GetPreferencesRequest{user_id}` | `GetPreferencesResponse{preferences[]}` | ✅基线 | 偏好查询 |
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| UpdatePreferences | `UpdatePreferencesRequest{user_id, preferences[]}` | `Empty` | ✅基线 | 偏好更新 |
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> **注**:02-architecture-design.md 设计 2 RPC;原 contract 版本的 GetPreferenceByChannel / ListPreferences 暂移除(待 ISSUE-009 仲裁是否保留)
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#### NotificationTemplateService(4 RPC:4 基线 + 2 扩展)
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| RPC | 请求 | 响应 | 基线/扩展 | 说明 |
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| -------------- | -------------------------------------------------------------------------------------------------- | -------------------------------------- | --------- | ---------- |
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| CreateTemplate | `CreateTemplateRequest{code, type, title_template, content_template, default_channels, variables}` | `NotificationTemplate` | ✅基线 | 创建模板 |
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| GetTemplate | `GetTemplateRequest{id}` | `NotificationTemplate` | ✅基线 | 查询模板 |
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| ListTemplates | `ListTemplatesRequest{type?, status?}` | `ListTemplatesResponse{templates[]}` | ✅基线 | 模板列表 |
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| UpdateTemplate | `UpdateTemplateRequest{id, ...}` | `NotificationTemplate` | ➕扩展 | 更新模板 |
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| DeleteTemplate | `DeleteTemplateRequest{id}` | `Empty` | ➕扩展 | 删除模板 |
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| RenderTemplate | `RenderTemplateRequest{code, variables, locale?}` | `RenderedNotification{title, content}` | ✅基线 | 渲染模板 |
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> **汇总**:基线 13 RPC(9 基线表中 ✅ × 5 + 偏好 ✅ × 2 + 模板 ✅ × 4 = 11... 实际基线 = NotificationService 5 + Preference 2 + Template 4 = 11)。**注**:若严格按 ai-allocation 13 RPC,基线应为 13,此处设计文档 11 基线 + 6 扩展 = 17,与 13 预算差 4。待 ISSUE-009 仲裁后最终确认。
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### 1.2 HTTP 端点
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> msg 对外以 gRPC 为主(BFF 通过 gRPC 调用)。以下 REST 端点为过渡期/管理端使用,最终将逐步迁移至 gRPC。
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| Method | Path | 权限 | 说明 |
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| ------ | ---------------------------------------- | ----------------------- | -------------------- |
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| POST | /notifications/send | MSG_NOTIFICATION_SEND | 单条发送 |
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| POST | /notifications/batch | MSG_NOTIFICATION_SEND | 批量发送 |
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| GET | /notifications/user/:userId | MSG_NOTIFICATION_READ | 用户通知列表 |
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| GET | /notifications/user/:userId/unread-count | MSG_NOTIFICATION_READ | 未读数(Redis) |
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| PUT | /notifications/:id/read | MSG_NOTIFICATION_READ | 标记已读 |
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| GET | /notifications/search | MSG_NOTIFICATION_READ | ES 全文检索 |
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| GET | /preferences/user/:userId | MSG_NOTIFICATION_READ | 用户偏好 |
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| PUT | /preferences/user/:userId | MSG_NOTIFICATION_MANAGE | 更新偏好 |
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| GET | /templates | MSG_NOTIFICATION_MANAGE | 模板列表 |
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| POST | /templates | MSG_NOTIFICATION_MANAGE | 创建模板 |
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### 1.3 GraphQL schema
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不适用(msg 是业务服务,非 BFF)。
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### 1.4 Kafka 事件发布
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> **⚠️ ISSUE-008 待仲裁**:topic 命名存在三套约定(per-event / aggregate / aggregate+action)。本表采用 02-architecture-design.md §5.2 约定(per-event topic),与 004 §7.2 一致。coord 裁决后统一。
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| Topic | Event Type | 触发时机 | 消费方 | Outbox |
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| ---------------------------- | --------------------------- | -------------- | ------------------------------ | ------ |
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| `edu.notification.sent` | NotificationSent | 通知发送成功 | push-gateway / data-ana | ✅ |
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| `edu.notification.read` | NotificationRead | 通知被标记已读 | data-ana | ✅ |
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| `edu.notification.recalled` | NotificationRecalled | 通知被撤回 | push-gateway(删除已推送消息) | ✅ |
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| `edu.notification.failed` | NotificationFailed | 通知投递失败 | data-ana(监控告警) | ✅ |
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> **Producer 幂等**:`idempotent=true` + `transactionalId=msg-producer`
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> **DLQ**:消费失败超 3 次投递 `edu.notification.dlq`(见 02-architecture-design.md §5,待补充)
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### 1.5 错误码前缀
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`MSG_`(完整清单见 02-architecture-design.md §6.2):
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- MSG_VALIDATION_ERROR / MSG_NOT_FOUND / MSG_PERMISSION_DENIED / MSG_CONFLICT / MSG_BUSINESS_ERROR / MSG_DATABASE_ERROR / MSG_INTERNAL_ERROR(当前已实现 7 个)
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- MSG_ES_UNAVAILABLE / MSG_REDIS_UNAVAILABLE / MSG_PUSH_GATEWAY_UNAVAILABLE / MSG_TEMPLATE_NOT_FOUND / MSG_TEMPLATE_RENDER_ERROR / MSG_RATE_LIMIT_EXCEEDED(P5 新增 6 个)
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---
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## §2 我消费什么(依赖上游)
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### 2.1 gRPC 调用(同步)
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| 调用方 | 对方服务 | 协议 | RPC | 用途 | 状态 |
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| ------------ | ------------ | ---- | -------------------- | ---------------------- | ------------------ |
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| msg → push | push-gateway | gRPC | PushService.Push | 实时推送通知到在线用户 | P5 待实现(D5) |
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> 当前降级:fetch POST `/internal/push`(见 [notifications.service.ts](../../../services/msg/src/notifications/notifications.service.ts) L179)
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> **调用方向澄清**(ISSUE-005):004 §4.1 表述"push-gateway → Msg"有歧义,实际方向是 msg → push-gateway
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### 2.2 Kafka 事件订阅(异步)
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> **⚠️ ISSUE-008 待仲裁**:topic 命名采用 02-architecture-design.md §5.1 约定(per-event topic,与 004 §7.2 一致)。原 contract 版本的 aggregate topic(edu.iam.user.events / edu.exam.events)待 coord 裁决后统一。
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| Topic | 来源服务 | 处理逻辑 | 触发通知 | 幂等键 | 阻塞性 |
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| ----------------------------------- | ------------- | ---------------------------- | -------------------- | ---------- | ------ |
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| `edu.identity.user.created` | iam (ai06) | 发送欢迎通知 | welcome 通知 | `event_id` | 🟡 |
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| `edu.identity.user.updated` | iam (ai06) | 用户信息变更,清理缓存 | — | `event_id` | 🟡 |
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| `edu.identity.user.deleted` | iam (ai06) | 用户删除,归档通知 | — | `event_id` | 🟡 |
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| `edu.identity.user.role_changed` | iam (ai06) | 角色变更通知 | system 通知 | `event_id` | 🟡 |
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| `edu.identity.role.created` | iam (ai06) | 角色新增(管理通知) | system 通知 | `event_id` | 🟡 |
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| `edu.identity.role.updated` | iam (ai06) | 角色权限变更通知 | system 通知 | `event_id` | 🟡 |
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| `edu.teaching.exam.published` | core-edu (ai08) | 推送考试通知给班级学生 | exam 通知(fan-out) | `event_id` | 🟡 |
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| `edu.teaching.assignment.submitted` | core-edu (ai08) | 通知教师有学生提交作业 | homework 通知 | `event_id` | 🟡 |
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| `edu.teaching.assignment.graded` | core-edu (ai08) | 通知学生作业已批改 | grade 通知 | `event_id` | 🟡 |
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| `edu.teaching.grade.recorded` | core-edu (ai08) | 通知学生成绩已录入 | grade 通知 | `event_id` | 🟡 |
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| `edu.teaching.attendance.recorded` | core-edu (ai08) | 出勤异常通知家长 | attendance 通知 | `event_id` | 🟡 |
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| `edu.insight.mastery.updated` | data-ana (ai11) | 学情掌握度下降,触发预警 | mastery_alert 通知 | `event_id` | 🟡 |
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> **⚠️ ISSUE-013 阻塞**:events.proto 当前仅有 ClassEvent / ExamEvent / HomeworkEvent / GradeEvent,缺 UserEvent / RoleEvent / MasteryEvent / NotificationEvent 4 类 message。msg 消费需 coord 补齐 proto(D1)。补齐前用通用 JSON payload 解析。
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>
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> **幂等去重**:三层防线(L1 Redis SETNX `msg:processed:{event_id}` TTL 7d / L2 msg_idempotency 表 / L3 notifications.event_id UNIQUE INDEX)
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### 2.3 HTTP 调用
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无主动 HTTP 调用上游(push-gateway 走 gRPC,HTTP 仅为降级)。
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---
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## §3 就绪信号
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### 3.1 我依赖的上游就绪标志
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| 标志 | 提供方 | 阻塞性 | 说明 |
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| ---- | ------ | ------ | ---- |
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| events.proto 补 UserEvent/RoleEvent/MasteryEvent/NotificationEvent | coord | 🔴 阻塞 T9 | D1,ISSUE-013 |
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| events.proto GradeEvent 补 class_id;全部补 student_ids[] | coord | 🔴 阻塞 fan-out | D2,ISSUE-006 |
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| msg.proto 补 5 扩展 RPC + Preference/Template Service | coord | 🔴 阻塞 gRPC | D3-D4,ISSUE-009 |
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| push-gateway gRPC PushService.Push | ai02 | 🔴 阻塞 T8 | D5 |
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| iam 发布 6 类 user/role 事件 | ai06 | 🟡 集成验证 | D6,开发期用 mock |
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| core-edu 发布 5 类教学事件 | ai08 | 🟡 集成验证 | D7 |
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| data-ana 发布 mastery 事件 | ai11 | 🟡 集成验证 | D8 |
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| Redis 集群可用 | infra | 🟡 降级 DB | D9 |
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### 3.2 我的就绪标志(供下游消费)
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- [ ] msg gRPC 50056 启用(HealthService.Check 返回 SERVING)
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- [ ] NotificationService RPC 可调用(基线 5 + 扩展 4,待 ISSUE-009 仲裁)
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- [ ] NotificationPreferenceService 2 RPC 可调用
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- [ ] NotificationTemplateService RPC 可调用(基线 4 + 扩展 2,含 RenderTemplate)
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- [ ] `edu.notification.sent/read/recalled/failed` topic 可发布(待 ISSUE-008 仲裁命名)
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- [ ] /readyz 返回 6 项依赖状态(DB/ES/Redis/Kafka producer/Kafka consumer/PushGateway)
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- [ ] 测试覆盖率 ≥ 80%
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---
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## §4 Mock 策略
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### 4.1 我提供的 mock(供下游)
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在 msg 真实服务就绪前,为下游(teacher-bff / student-bff / parent-bff / push-gateway)提供 mock:
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- **gRPC mock**:grpc-mock 拦截 50056 端口
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- ListNotifications 返回固定 10 条未读通知
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- MarkAsRead 返回 success=true
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- GetPreferences 返回默认偏好(in_app + email 开启,sms + push 关闭)
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- RenderTemplate 返回固定 title + content
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- **Kafka mock**:msg 就绪前不发布真实通知事件,push-gateway 使用本地 stub 推送
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### 4.2 我消费的 mock(开发期间)
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在真实上游就绪前,msg 使用以下 mock:
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- **业务事件**:core-edu / data-ana 就绪前,msg 内置定时器发布本地 stub 事件(ExamEvent / HomeworkEvent),触发 mock 通知流程
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- **用户偏好**:iam 就绪前使用默认偏好(所有用户 in_app 开启)
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- **模板渲染**:内置 5 个常用模板(exam.published / homework.graded / grade.recorded / mastery.warning / system.notice)
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- **Push Gateway**:ai02 就绪前用 fetch POST /internal/push 降级(当前实现保留)
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---
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## §5 待仲裁项汇总
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| ISSUE | 主题 | 阻塞性 | 当前采用 |
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| ----- | ---- | ------ | -------- |
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| ISSUE-008 | Kafka topic 命名(per-event vs aggregate) | 🟡 | per-event(02-architecture-design.md §5 + 004 §7.2) |
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| ISSUE-009 | RPC 数量(13 vs 17) | 🟡 | 17(02-architecture-design.md §4.2),标注基线/扩展 |
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| ISSUE-013 | events.proto 缺 4 类 message | 🔴 | 用 JSON payload 降级,待 coord 补齐 |
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| ISSUE-006 | events.proto P9 字段描述 | 🟡 | 待 coord 修正 |
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| ISSUE-010 | markAsRead 权限点 | 🟡 | 以 02-architecture-design.md §6.1 为准(READ) |
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| ISSUE-011 | DB↔ES 降级方向 | 🟡 | 待 coord 仲裁(双向降级 vs 单向) |
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