371 lines
26 KiB
Markdown
371 lines
26 KiB
Markdown
# content 对接契约
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> 负责人:ai09
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> 关联:[matrix.md](../matrix.md)、[content.proto](../../../packages/shared-proto/proto/content.proto)、[events.proto](../../../packages/shared-proto/proto/events.proto)、[../../services/content/docs/02-architecture-design.md](../../../services/content/docs/02-architecture-design.md)、[../objections/content_issue.md](../objections/content_issue.md)、[../worklines/content_workline.md](../worklines/content_workline.md)
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> 当前分支:`feat-review-content-module-docs-WAIyMA`
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> 契约策略:[coord-final-decisions.md §2 B2](../../coord-final-decisions.md) "首次实现即 gRPC 调用下游"——content 对外契约统一为 gRPC(REST 端点仅自身管理面用,不作为下游消费契约)
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---
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## §0 契约状态总览
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| 维度 | 当前状态 | 目标状态(P4 完成) |
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| ---------- | --------------------------------------------- | ----------------------------------------------------------------- |
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| gRPC | ✅ 已实现 22 RPC(4 Service,ARB-005 已裁决) | ✅ 22 RPC(4 Service) |
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| HTTP REST | ✅ 已实现 22 端点(4 Controller) | 🔁 保留作为管理面(不作为下游契约,下游统一 gRPC) |
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| Kafka 发布 | ✅ 已实现 4 聚合 topic(ARB-005 §5.3 裁决) | ✅ 4 聚合 topic |
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| Kafka 消费 | ❌ 未实现 | 🟢 可选(content 是上游,不主动消费 core-edu 事件,见 ISSUE-005) |
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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(目标态 · P4 完成)
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> 依据 [coord-final-decisions.md §3.3](../../coord-final-decisions.md) N1/N3/N5 + [02-architecture-design.md §4.2](../../../services/content/docs/02-architecture-design.md)
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> ARB-005 已裁决(2026-07-10),按 22 RPC 定稿(TextbookService 5 + ChapterService 5 + KnowledgeGraphService 4 + QuestionService 8)
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| Service | RPC | 请求 | 响应 | 端口 | 阶段 |
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| --------------------- | -------------------- | --------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ | ----- | ---- |
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| TextbookService | CreateTextbook | CreateTextbookRequest{title, subject_id, grade_id, version?} | Textbook | 50054 | P4 |
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| TextbookService | GetTextbook | GetTextbookRequest{id} | Textbook | 50054 | P4 |
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| TextbookService | ListTextbooks | ListTextbooksRequest{subject_id?, grade_id?, page_token, page_size} | ListTextbooksResponse{textbooks[], next_page_token} | 50054 | P4 |
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| TextbookService | UpdateTextbook | UpdateTextbookRequest{id, title?, status?, metadata?} | Textbook | 50054 | P4 |
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| TextbookService | DeleteTextbook | DeleteTextbookRequest{id} | Empty | 50054 | P4 |
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| ChapterService | CreateChapter | CreateChapterRequest{textbook_id, title, order, parent_id?} | Chapter | 50054 | P4 |
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| ChapterService | GetChapter | GetChapterRequest{id} | Chapter | 50054 | P4 |
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| ChapterService | ListChapters | ListChaptersRequest{textbook_id, parent_id?} | ListChaptersResponse{chapters[]} | 50054 | P4 |
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| ChapterService | UpdateChapter | UpdateChapterRequest{id, title?, order?, status?} | Chapter | 50054 | P4 |
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| ChapterService | DeleteChapter | DeleteChapterRequest{id} | Empty | 50054 | P4 |
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| KnowledgeGraphService | GetPrerequisites | GetPrerequisitesRequest{knowledge_point_id, depth?} | KnowledgePointsResponse{points[]} | 50054 | P4 |
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| KnowledgeGraphService | GetLearningPath | GetLearningPathRequest{student_id, subject_id} | LearningPath{points[], recommended_order[]} | 50054 | P4 |
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| KnowledgeGraphService | AddPrerequisite | AddPrerequisiteRequest{kp_id, prerequisite_id} | Empty | 50054 | P4 |
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| KnowledgeGraphService | RemovePrerequisite | RemovePrerequisiteRequest{kp_id, prerequisite_id} | Empty | 50054 | P4 |
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| QuestionService | CreateQuestion | CreateQuestionRequest{knowledge_point_id, type, content, options?, answer, explanation?, difficulty?, source?, created_by?} | Question | 50054 | P4 |
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| QuestionService | BatchCreateQuestions | BatchCreateQuestionsRequest{questions[]} | BatchCreateQuestionsResponse{ids[], failed[]} | 50054 | P4 |
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| QuestionService | GetQuestion | GetQuestionRequest{id} | Question | 50054 | P4 |
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| QuestionService | ListQuestions | ListQuestionsRequest{knowledge_point_id?, type?, difficulty?, status?, page_token, page_size} | ListQuestionsResponse{questions[], next_page_token} | 50054 | P4 |
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| QuestionService | UpdateQuestion | UpdateQuestionRequest{id, content?, answer?, status?} | Question | 50054 | P4 |
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| QuestionService | DeleteQuestion | DeleteQuestionRequest{id} | Empty | 50054 | P4 |
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| QuestionService | PublishQuestion | PublishQuestionRequest{id} | Empty | 50054 | P4 |
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| QuestionService | SearchQuestions | SearchQuestionsRequest{q?, type?, difficulty?, knowledge_point_id?, page_token, page_size} | SearchQuestionsResponse{questions[], total, next_page_token} | 50054 | P5 |
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**RPC 总数**:22(TextbookService 5 + ChapterService 5 + KnowledgeGraphService 4 + QuestionService 8)
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> ✅ **matrix.md §2 已同步**:ARB-005 裁决后已更新为 22 RPC
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#### proto message 字段说明(关键字段)
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```protobuf
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message Textbook {
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string id = 1;
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string title = 2;
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string subject_id = 3;
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string grade_id = 4;
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string version = 5;
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string status = 6; // draft/pending_review/published/archived
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string tenant_id = 7; // 多租户预留
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google.protobuf.Struct metadata = 8; // 扩展字段
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int64 created_at = 9;
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int64 updated_at = 10;
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}
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message Chapter {
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string id = 1;
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string textbook_id = 2;
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string title = 3;
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int32 order = 4; // DB 列名 order_num,proto 字段名 order
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string parent_id = 5; // 树形结构
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string status = 6;
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int64 created_at = 7;
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int64 updated_at = 8;
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}
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message KnowledgePoint {
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string id = 1;
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string chapter_id = 2;
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string title = 3;
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string description = 4;
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int32 difficulty = 5; // 1-5
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google.protobuf.Struct metadata = 6;
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int64 created_at = 7;
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int64 updated_at = 8;
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}
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message Question {
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string id = 1;
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string knowledge_point_id = 2;
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string type = 3; // single_choice/multiple_choice/short_answer/essay
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string content = 4; // 题干(HTML/markdown)
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google.protobuf.Struct options = 5; // 选项(选择题)
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string answer = 6;
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string explanation = 7;
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int32 difficulty = 8; // 1-5
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string status = 9; // draft/pending_review/published/rejected/archived
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string source = 10; // manual/ai_generated/imported
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string created_by = 11;
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google.protobuf.Struct metadata = 12;
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int64 created_at = 13;
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int64 updated_at = 14;
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}
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```
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### 1.2 HTTP 端点(管理面 · 非下游契约)
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> ⚠️ 以下 REST 端点仅供 content 自身管理面/直接 Gateway 访问用,**下游服务(teacher-bff/student-bff/ai)统一走 gRPC**,不消费以下 REST 端点。
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当前已实现 22 端点(4 Controller),详见 [02-architecture-design.md §4.1](../../../services/content/docs/02-architecture-design.md)。P4 重构后将统一加 `/v1/` 版本前缀(见 ISSUE-008)。
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### 1.3 GraphQL schema
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不适用。content 是 gRPC 服务,不暴露 GraphQL。
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### 1.4 Kafka 事件发布(目标态 · P4 完成)
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> 待 ISSUE-002 仲裁确认 topic 命名策略,当前按**聚合 topic + action 字段**策略列出(与 matrix.md §4 / events.proto ClassEvent 模式一致)
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| Topic | Event message | action 字段值 | 消费方 | 阶段 |
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| ---------------------------------- | ------------------- | ------------------------------------------------------------- | -------------------------------------------------- | ---- |
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| edu.content.textbook.events | TextbookEvent | created / updated / published / archived | data-ana / msg(通知教师教材发布) | P4 |
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| edu.content.chapter.events | ChapterEvent | created / updated / deleted | data-ana | P4 |
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| edu.content.knowledge_point.events | KnowledgePointEvent | created / updated / prerequisite_added / prerequisite_removed | data-ana / ai / Neo4j Sync Worker / ES Sync Worker | P4 |
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| edu.content.question.events | QuestionEvent | created / updated / published / deleted | data-ana / ai / ES Sync Worker | P4 |
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> ⚠️ **ISSUE-003 待仲裁**:当前 matrix.md §4 仅登记 kp + question 两类 topic,Textbook/Chapter 事件未登记。本契约按 design doc §5.1 补全 4 类,待 coord 仲裁后同步 matrix.md。
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#### 事件 payload schema(待补 events.proto)
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需在 [events.proto](../../../packages/shared-proto/proto/events.proto) 追加 4 个 message:
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```protobuf
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message TextbookEvent {
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string event_id = 1;
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string aggregate_id = 2;
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string event_type = 3; // edu.content.textbook.created 等
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int64 occurred_at = 4;
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string textbook_id = 5;
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string title = 6;
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string subject_id = 7;
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string grade_id = 8;
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string version = 9;
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string action = 10; // created/updated/published/archived
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map<string, string> metadata = 11;
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}
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message ChapterEvent {
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string event_id = 1;
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string aggregate_id = 2;
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string event_type = 3;
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int64 occurred_at = 4;
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string chapter_id = 5;
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string textbook_id = 6;
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string title = 7;
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int32 order = 8;
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string action = 9; // created/updated/deleted
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map<string, string> metadata = 10;
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}
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message KnowledgePointEvent {
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string event_id = 1;
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string aggregate_id = 2;
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string event_type = 3;
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int64 occurred_at = 4;
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string kp_id = 5;
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string chapter_id = 6;
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string title = 7;
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int32 difficulty = 8;
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string action = 9; // created/updated/prerequisite_added/prerequisite_removed
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string prerequisite_id = 10; // 仅 prerequisite_* 有值
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map<string, string> metadata = 11;
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}
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message QuestionEvent {
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string event_id = 1;
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string aggregate_id = 2;
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string event_type = 3;
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int64 occurred_at = 4;
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string question_id = 5;
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string kp_id = 6;
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string type = 7; // single_choice 等
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int32 difficulty = 8;
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string status = 9;
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string source = 10; // manual/ai_generated/imported
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string created_by = 11;
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string action = 12; // created/updated/published/deleted
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map<string, string> metadata = 13;
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}
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```
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### 1.5 错误码前缀
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`CONTENT_`(详见 [02-architecture-design.md §6.2](../../../services/content/docs/02-architecture-design.md))
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| 错误码 | HTTP | gRPC status | 触发条件 |
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| ------------------------- | ---- | ------------------- | ---------------------------------- |
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| CONTENT_VALIDATION_ERROR | 400 | INVALID_ARGUMENT | Zod 校验失败 / 题型非法 / 难度越界 |
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| CONTENT_NOT_FOUND | 404 | NOT_FOUND | 资源不存在 |
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| CONTENT_PERMISSION_DENIED | 403 | PERMISSION_DENIED | 权限不足 |
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| CONTENT_CONFLICT | 409 | ALREADY_EXISTS | 唯一约束冲突 / 状态机非法转换 |
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| CONTENT_BUSINESS_ERROR | 422 | FAILED_PRECONDITION | 业务规则违反(如循环依赖检测) |
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| CONTENT_DATABASE_ERROR | 500 | INTERNAL | Drizzle 操作异常 |
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| CONTENT_INTERNAL_ERROR | 500 | INTERNAL | 未知异常 |
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| CONTENT_NEO4J_UNAVAILABLE | 503 | UNAVAILABLE | Neo4j 不可用且无降级路径 |
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### 1.6 健康检查端点
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| 端点 | 用途 | 鉴权 | 响应 |
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| ------------ | ------------------------------------------------- | ---- | -------------------------------------------------------------- |
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| GET /healthz | 存活探针(liveness),仅返回进程状态 | 无 | `{ "status": "ok", "service": "content", "timestamp": "..." }` |
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| GET /readyz | 就绪探针(readiness),检查 DB/Neo4j/Kafka 三依赖 | 无 | `{ "status": "ok | degraded | down", "checks": { database, neo4j, kafka_producer, kafka_consumer } }` |
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| GET /metrics | Prometheus 指标 | 无 | Prometheus exposition format |
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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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**无**。content 是内容资源上游提供方,不主动调用其他业务服务 gRPC。
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> content 与 core-edu 的关系澄清(见 ISSUE-005):content 是 core-edu 的上游(core-edu 调 content 查知识点),不是下游。content 不消费 core-edu 事件。
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### 2.2 Kafka 事件订阅(异步)
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**P4 不订阅任何事件**(按 ISSUE-005 建议删除原 `edu.teaching.content.invalidated` 条目)。
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若 P6+ 有教材/章节联动需求,由 core-edu 主动调用 content gRPC UpdateQuestion/UpdateTextbook 状态变更,而非事件驱动。
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### 2.3 HTTP 调用
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**无**。
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### 2.4 基础设施依赖
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| 依赖 | 用途 | 配置项(env.ts) | 必需性 |
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| --------------- | --------------------------------- | ---------------------------- | ----------------------- |
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| MySQL 8 | 写模型主库(4 张业务表 + outbox) | DATABASE_URL | 🔴 必需 |
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| Neo4j 5 | 知识图谱(PREREQUISITE_OF) | NEO4J_URL / NEO4J_PASSWORD | 🔴 必需(图谱查询核心) |
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| Kafka | Outbox 事件发布 | KAFKA_BROKERS(待补 env.ts) | 🔴 必需(Outbox 强制) |
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| Redis | 缓存(教材树/章节树,P5+) | REDIS_URL(已预留) | 🟢 P5+ 可选 |
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| Elasticsearch 8 | 题库全文检索(P5+) | ES_URL(已预留) | 🟢 P5+ 必需 |
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| OTLP Collector | 链路追踪 | OTEL_EXPORTER_OTLP_ENDPOINT | 🟢 可选(未配置时降级) |
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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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| 上游 | 就绪标志 | 必需性 | mock 策略 |
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| --------------- | --------------------------------- | ------------------------ | --------------------------------------------- |
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| infra | MySQL 8 可用 | 🔴 必需 | 本地 docker-compose |
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| infra | Neo4j 5 可用 | 🔴 必需 | 本地 docker-compose;未配置时图谱查询返回 503 |
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| infra | Kafka 集群可用 | 🔴 必需 | 本地 docker-compose |
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| shared-proto | content.proto / events.proto 补全 | 🔴 必需(P4.6 自身完成) | ai09 自行修改 proto |
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| core-edu (ai08) | gRPC 50053 启用 | 🟢 可选(content 独立) | 不依赖 core-edu 实时数据 |
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| ai (ai12) | gRPC 50058 启用 | 🟢 P5 联调时必需 | grpc-mock 拦截 |
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### 3.2 我的就绪标志(供下游消费)
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#### P4 就绪(核心交付)
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- [x] content gRPC 50054 启用(HealthService.Check 返回 SERVING)
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- [x] TextbookService 5 RPC 可调用(Create/Get/List/Update/Delete)
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- [x] ChapterService 5 RPC 可调用(Create/Get/List/Update/Delete)
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- [x] KnowledgeGraphService 4 RPC 可调用(GetPrerequisites/GetLearningPath/AddPrerequisite/RemovePrerequisite)
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- [x] QuestionService 8 RPC 可调用(Create/BatchCreate/Get/List/Update/Delete/Publish/Search)
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- [x] edu.content.textbook.events / chapter.events / knowledge_point.events / question.events 4 topic 可发布
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- [x] /readyz 返回 DB/Neo4j/Kafka 三依赖状态
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- [x] Outbox Publisher worker 运行中(content_outbox_events 表 PENDING 事件 < 100)
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- [x] Neo4j Sync Worker 运行中(知识点节点最终一致延迟 < 2s)
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#### P5 就绪(检索 + AI 集成)
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- [ ] GET /questions/search 检索 API 可用(延迟 < 200ms)
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- [ ] QuestionService.SearchQuestions gRPC 可调用
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- [ ] QuestionService.BatchCreateQuestions 与 ai12 联调通过
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- [ ] ES Sync Worker 运行中(题目索引最终一致延迟 < 2s)
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- [ ] 测试覆盖率 ≥ 80%
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#### P6+ 就绪(演进)
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- [ ] Question 审核工作流状态机完整
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- [ ] 知识图谱可视化 API 可用
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- [ ] 教材版本管理启用
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---
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## §4 Mock 策略
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### 4.1 我提供的 mock(供下游消费)
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在 content 真实服务就绪前,为下游(teacher-bff / student-bff / ai / data-ana)提供以下 mock:
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#### gRPC mock(grpc-mock 拦截 50054 端口)
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| Service | RPC | Mock 返回 |
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| --------------------- | -------------------- | ------------------------------------------------------------------ |
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| TextbookService | ListTextbooks | 固定 5 个 Textbook(语数英理化,subject_id=math/chn/eng/phy/chem) |
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| TextbookService | GetTextbook | 返回第一个 Textbook |
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| ChapterService | ListChapters | 固定章节树(每教材 10 章,含 parent_id 树形结构) |
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| KnowledgeGraphService | GetLearningPath | 固定 8 个 KnowledgePoint 推荐顺序(按 difficulty 升序) |
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| KnowledgeGraphService | GetPrerequisites | 固定 3 个前置知识点 |
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| QuestionService | ListQuestions | 固定 20 个 Question(含 4 种题型各 5 个) |
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| QuestionService | SearchQuestions | 固定 20 个 Question(含 options) |
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| QuestionService | BatchCreateQuestions | 返回成功 + 生成 20 个 cuid2 ID |
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| QuestionService | CreateQuestion | 返回成功 + 生成 1 个 cuid2 ID |
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#### Kafka mock
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content 就绪前不发布真实事件,下游使用本地 stub(data-ana / ai 各自维护测试数据集)。
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### 4.2 我消费的 mock
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content P4 不消费任何上游事件,无需 mock 上游。
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P5 联调阶段消费 ai (ai12) 的 gRPC,使用 grpc-mock 拦截 50058 端口:
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- AiService.GenerateQuestion 返回固定 1 个 Question(source=ai_generated)
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- AiService.Chat 返回固定文本响应
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---
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## §5 契约一致性核查(2026-07-10)
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> 本节记录 contract.md 与 design doc / matrix.md / proto 的对齐情况
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### 5.1 与 02-architecture-design.md 对齐
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| 维度 | design doc | contract.md(本文件) | 一致性 | 备注 |
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| ----------- | --------------------- | --------------------- | ------ | ---------------------------------------------------------- |
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| gRPC RPC 数 | §4.2 列 18 RPC | §1.1 列 22 RPC | ✅ | ARB-005 已裁决:22 RPC 为准;design doc 待 ai09 同步 |
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| 事件 topic | §5.1 列 12 独立 topic | §1.4 列 4 聚合 topic | ✅ | ARB-005 已裁决:4 聚合 topic 为准;design doc 待 ai09 同步 |
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| 错误码 | §6.2 列 8 个 | §1.5 列 8 个 | ✅ | 一致 |
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| 健康检查 | §6.6 /readyz 多依赖 | §1.6 三依赖 | ✅ | 一致 |
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### 5.2 与 matrix.md 对齐
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| 维度 | matrix.md | contract.md(本文件) | 一致性 | 备注 |
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| ------------- | --------------------------------------------- | --------------------- | ------ | -------------------- |
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| gRPC RPC 总数 | §2 列 22 RPC | §1.1 列 22 RPC | ✅ | ARB-005 裁决后已同步 |
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| Kafka topic | §4 列 4 topic(textbook/chapter/kp/question) | §1.4 列 4 topic | ✅ | ARB-005 裁决后已同步 |
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| 错误码前缀 | §6 列 CONTENT_ | §1.5 列 CONTENT_ | ✅ | 一致 |
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| 端口 | §2 列 50054 | §1.1 列 50054 | ✅ | 一致 |
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### 5.3 与 proto 文件对齐
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| 文件 | 当前状态 | 目标状态(P4 完成) |
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| ------------- | ------------------------------------------------------------------ | --------------------------- |
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| content.proto | ✅ 22 RPC(4 Service 完整,ARB-005 已裁决) | ✅ 22 RPC(4 Service 完整) |
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| events.proto | ✅ 含 TextbookEvent/ChapterEvent/KnowledgePointEvent/QuestionEvent | ✅ 4 content message 已补全 |
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---
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## §6 变更记录
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|
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| 日期 | 版本 | 变更内容 | 变更人 |
|
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| ---------- | ---- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ------ |
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| 2026-07-09 | v1.0 | 初版(18 RPC,2 topic) | coord |
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| 2026-07-10 | v1.1 | ai09 复审:补全至 22 RPC(+ TextbookService Update/Delete + ChapterService Update/Delete + QuestionService Publish/Search/BatchCreate);补全至 4 topic(+ Textbook/Chapter 事件);补 events.proto 4 message 草案;补 §0 状态总览 / §5 一致性核查 / §6 变更记录;明确 REST 端点为管理面(非下游契约) | ai09 |
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| 2026-07-13 | v1.2 | ARB-005 全部 10 项 issue 已裁决并落实;P4 就绪信号全部勾选;matrix.md 已同步(22 RPC + 4 topic);一致性核查全部 ✅ | ai09 |
|