fix(server): use job queue instead event on doc indexing changes (#12893)

close CLOUD-231



#### PR Dependency Tree


* **PR #12893** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Refactor**
- Updated background processing for document indexing and deletion to
use a job queue system instead of event-based triggers.
- **Bug Fixes**
- Improved reliability of embedding updates and deletions by ensuring
tasks are properly queued and processed.
- **Tests**
- Adjusted tests to verify that document operations correctly trigger
job queue actions.
  
No changes to user-facing features or interface.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/embedding/job.ts

@@ -159,8 +159,10 @@ export class CopilotEmbeddingJob {
     }
   }
 
-  @OnEvent('doc.indexer.updated')
-  async addDocEmbeddingQueueFromEvent(doc: Events['doc.indexer.updated']) {
+  @OnJob('copilot.embedding.updateDoc')
+  async addDocEmbeddingQueueFromEvent(
+    doc: Jobs['copilot.embedding.updateDoc']
+  ) {
     if (!this.supportEmbedding || !this.embeddingClient) return;
 
     await this.queue.add(
@@ -176,8 +178,10 @@ export class CopilotEmbeddingJob {
     );
   }
 
-  @OnEvent('doc.indexer.deleted')
-  async deleteDocEmbeddingQueueFromEvent(doc: Events['doc.indexer.deleted']) {
+  @OnJob('copilot.embedding.deleteDoc')
+  async deleteDocEmbeddingQueueFromEvent(
+    doc: Jobs['copilot.embedding.deleteDoc']
+  ) {
     await this.queue.remove(
       `workspace:embedding:${doc.workspaceId}:${doc.docId}`,
       'copilot.embedding.docs'

packages/backend/server/src/plugins/copilot/embedding/types.ts

@@ -43,6 +43,16 @@ declare global {
       docId: string;
     };
 
+    'copilot.embedding.updateDoc': {
+      workspaceId: string;
+      docId: string;
+    };
+
+    'copilot.embedding.deleteDoc': {
+      workspaceId: string;
+      docId: string;
+    };
+
     'copilot.embedding.files': {
       contextId?: string;
       userId: string;

packages/backend/server/src/plugins/indexer/__tests__/service.spec.ts

@@ -1884,12 +1884,12 @@ test('should delete doc work', async t => {
   t.is(result4.nodes.length, 1);
   t.deepEqual(result4.nodes[0].fields.docId, [docId2]);
 
-  const count = module.event.count('doc.indexer.deleted');
+  const count = module.queue.count('copilot.embedding.deleteDoc');
 
   await indexerService.deleteDoc(workspaceId, docId1, {
     refresh: true,
   });
-  t.is(module.event.count('doc.indexer.deleted'), count + 1);
+  t.is(module.queue.count('copilot.embedding.deleteDoc'), count + 1);
 
   // make sure the docId1 is deleted
   result1 = await indexerService.search({
@@ -2044,7 +2044,7 @@ test('should list doc ids work', async t => {
 // #region indexDoc()
 
 test('should index doc work', async t => {
-  const count = module.event.count('doc.indexer.updated');
+  const count = module.queue.count('copilot.embedding.updateDoc');
   const docSnapshot = await module.create(Mockers.DocSnapshot, {
     workspaceId: workspace.id,
     user,
@@ -2110,7 +2110,7 @@ test('should index doc work', async t => {
   t.snapshot(
     result2.nodes.map(node => omit(node.fields, ['workspaceId', 'docId']))
   );
-  t.is(module.event.count('doc.indexer.updated'), count + 1);
+  t.is(module.queue.count('copilot.embedding.updateDoc'), count + 1);
 });
 // #endregion
 

packages/backend/server/src/plugins/indexer/index.ts

@@ -27,16 +27,3 @@ export class IndexerModule {}
 
 export { IndexerService };
 export type { SearchDoc } from './types';
-
-declare global {
-  interface Events {
-    'doc.indexer.updated': {
-      workspaceId: string;
-      docId: string;
-    };
-    'doc.indexer.deleted': {
-      workspaceId: string;
-      docId: string;
-    };
-  }
-}

packages/backend/server/src/plugins/indexer/service.ts

@@ -2,8 +2,8 @@ import { Injectable, Logger } from '@nestjs/common';
 import { camelCase, chunk, mapKeys, snakeCase } from 'lodash-es';
 
 import {
-  EventBus,
   InvalidIndexerInput,
+  JobQueue,
   SearchProviderNotFound,
 } from '../../base';
 import { readAllBlocksFromDocSnapshot } from '../../core/utils/blocksuite';
@@ -110,7 +110,7 @@ export class IndexerService {
   constructor(
     private readonly models: Models,
     private readonly factory: SearchProviderFactory,
-    private readonly event: EventBus
+    private readonly queue: JobQueue
   ) {}
 
   async createTables() {
@@ -285,11 +285,12 @@ export class IndexerService {
       })),
       options
     );
-    this.event.emit('doc.indexer.updated', {
+
+    await this.queue.add('copilot.embedding.updateDoc', {
       workspaceId,
       docId,
     });
-    this.logger.debug(
+    this.logger.log(
       `synced doc ${workspaceId}/${docId} with ${result.blocks.length} blocks`
     );
   }
@@ -319,12 +320,13 @@ export class IndexerService {
       },
       options
     );
-    this.logger.debug(`deleted doc ${workspaceId}/${docId}`);
+
     await this.deleteBlocksByDocId(workspaceId, docId, options);
-    this.event.emit('doc.indexer.deleted', {
+    await this.queue.add('copilot.embedding.deleteDoc', {
       workspaceId,
       docId,
     });
+    this.logger.log(`deleted doc ${workspaceId}/${docId}`);
   }
 
   async deleteBlocksByDocId(