2025年10月30日 ai-systems

TypeScript+Rust混合架构的工程实践：AFFiNE如何重新定义知识管理系统

深入分析AFFiNE的TypeScript+Rust技术栈，探讨块级架构设计、跨语言数据同步以及文档与白板双模式融合的工程实现。

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在知识管理工具的竞争格局中，Notion与Miro分别占据了文档编辑与可视化白板的领先地位。AFFiNE作为新一代开源替代品，通过TypeScript+Rust的混合架构和创新的块级设计，实现了文档与白板的无缝融合，为知识管理领域带来了全新的工程范式。534个GitHub星标和活跃的开源社区发展，充分证明了这一技术路线的市场认可度。

混合架构的战略选择：TypeScript与Rust的协同设计

AFFiNE选择TypeScript+Rust的技术组合，并非简单的技术堆叠，而是基于性能优化、跨平台兼容性和长期维护性的战略考量。TypeScript提供了优秀的开发体验和丰富的生态，而Rust则承担了底层性能关键的数据处理任务。

前后端语言边界的设计哲学

// TypeScript端 - 用户交互层与业务逻辑
export interface BlockNode {
  id: string;
  type: string;
  props: Record<string, any>;
  children: BlockNode[];
}

export class BlockManager {
  private blocks: Map<string, BlockNode> = new Map();
  private listeners: Set<BlockChangeListener> = new Set();
  
  // 高层业务逻辑处理
  async createBlock(type: string, props: any): Promise<string> {
    const id = generateId();
    const block: BlockNode = {
      id,
      type,
      props: this.sanitizeProps(props),
      children: []
    };
    
    this.blocks.set(id, block);
    this.notifyChange('create', block);
    
    // 异步同步到Rust后端
    await this.syncToRust(id, block);
    return id;
  }
  
  // 与Rust后端通信的接口
  private async syncToRust(id: string, block: BlockNode): Promise<void> {
    const serializedData = JSON.stringify(block);
    const result = await nativeModule.processBlockData(id, serializedData);
    
    if (!result.success) {
      throw new Error(`Rust同步失败: ${result.error}`);
    }
  }
}

// Rust端 - 高性能数据处理
use serde::{Deserialize, Serialize};
use std::collections::HashMap;
use tokio::sync::mpsc;

#[derive(Debug, Serialize, Deserialize)]
pub struct BlockData {
    pub id: String,
    pub r#type: String,
    pub props: HashMap<String, serde_json::Value>,
    pub children: Vec<BlockData>,
}

pub struct RustProcessor {
    storage: HashMap<String, BlockData>,
    sync_sender: mpsc::UnboundedSender<SyncMessage>,
}

impl RustProcessor {
    pub fn new() -> Self {
        Self {
            storage: HashMap::new(),
            sync_sender: mpsc::unbounded_channel().0,
        }
    }
    
    pub fn process_block_data(&mut self, id: String, data: String) -> Result<String, String> {
        let block: BlockData = serde_json::from_str(&data)
            .map_err(|e| format!("反序列化失败: {}", e))?;
            
        // 高性能数据索引和查询
        self.build_block_index(&block);
        self.storage.insert(id.clone(), block);
        
        // 异步触发同步事件
        let _ = self.sync_sender.send(SyncMessage::BlockUpdated(id));
        
        Ok(id)
    }
    
    fn build_block_index(&self, block: &BlockData) {
        // 建立高效的搜索索引
        self.index_block_content(block);
        if !block.children.is_empty() {
            for child in &block.children {
                self.index_block_content(child);
            }
        }
    }
}

这种混合架构实现了职责分离：TypeScript处理复杂的用户交互逻辑，而Rust专注于高性能的数据处理和存储。这种设计既保持了开发效率，又确保了系统的整体性能。

块级架构的创新实践：从Notion理念到工程实现

AFFiNE的块级架构是"万物皆模块"设计理念的深度工程化实践。每个内容单元都被抽象为独立的Block，支持动态组合和跨视图迁移。

Block系统的类型系统设计

// Block类型系统定义
export abstract class BaseBlock<TProps extends BaseProps> {
  abstract readonly type: string;
  protected props: TProps;
  
  constructor(props: TProps) {
    this.props = props;
  }
  
  // 块级协议定义
  abstract render(): React.ReactNode;
  abstract toJSON(): BlockNode;
  abstract fromJSON(data: BlockNode): BaseBlock<TProps>;
  
  // 块级操作接口
  blockClone(): this {
    return new (this.constructor as new (props: TProps) => this)({...this.props});
  }
  
  blockMerge(other: this): boolean {
    // 实现特定块的合并逻辑
    return this.canMergeWith(other);
  }
  
  protected canMergeWith(other: this): boolean {
    return this.type === other.type && this.props.mergeCompatible;
  }
}

// 文本块的具体实现
export class TextBlock extends BaseBlock<TextProps> {
  readonly type = 'text';
  
  render() {
    return (
      <div 
        contentEditable
        suppressContentEditableWarning
        onInput={this.handleTextChange}
        className="text-block"
        data-block-id={this.props.id}
      >
        {this.props.content}
      </div>
    );
  }
  
  toJSON(): BlockNode {
    return {
      id: this.props.id,
      type: this.type,
      props: this.props,
      children: []
    };
  }
  
  static fromJSON(data: BlockNode): TextBlock {
    return new TextBlock(data.props as TextProps);
  }
  
  private handleTextChange = (event: React.FormEvent<HTMLDivElement>) => {
    const content = event.currentTarget.textContent || '';
    this.props.content = content;
    this.onBlockChange();
  };
  
  private onBlockChange() {
    // 触发块级更新事件
    document.dispatchEvent(new CustomEvent('block:update', {
      detail: { id: this.props.id, block: this }
    }));
  }
}

// 数据库块实现 - 支持多视图
export class DatabaseBlock extends BaseBlock<DatabaseProps> {
  readonly type = 'database';
  
  render() {
    return (
      <DatabaseView
        data={this.props.data}
        viewType={this.props.currentView}
        onViewChange={this.handleViewChange}
        onDataChange={this.handleDataChange}
      />
    );
  }
  
  // 动态视图切换
  private handleViewChange = (newView: ViewType) => {
    this.props.currentView = newView;
    this.onBlockChange();
  };
  
  // 数据变更处理
  private handleDataChange = (newData: any[]) => {
    this.props.data = newData;
    this.onBlockChange();
    
    // 与Rust后端同步数据库变更
    this.syncDatabaseChanges();
  };
  
  private async syncDatabaseChanges(): Promise<void> {
    const queryResult = await nativeModule.queryDatabase(
      this.props.id, 
      JSON.stringify(this.props.data)
    );
    
    // 处理查询结果
    if (queryResult.optimized) {
      this.applyQueryOptimization(queryResult.suggestions);
    }
  }
}

跨视图Block渲染引擎

// Block渲染引擎 - 支持文档视图和白板视图
export class BlockRenderer {
  private viewMode: 'page' | 'edgeless' = 'page';
  private layoutEngine: LayoutEngine;
  private reactEngine: ReactEngine;
  
  constructor() {
    this.layoutEngine = new LayoutEngine();
    this.reactEngine = new ReactEngine();
  }
  
  // 根据视图模式渲染Block
  renderBlock(block: BaseBlock<any>): React.ReactNode {
    if (this.viewMode === 'page') {
      return this.renderForPageView(block);
    } else {
      return this.renderForEdgelessView(block);
    }
  }
  
  private renderForPageView(block: BaseBlock<any>): React.ReactNode {
    const pageLayout = this.layoutEngine.calculatePageLayout(block);
    
    return (
      <div 
        className="page-view-item"
        style={{ 
          position: 'relative',
          top: pageLayout.y,
          left: pageLayout.x,
          width: pageLayout.width,
          height: pageLayout.height 
        }}
      >
        <BlockContainer>
          {block.render()}
        </BlockContainer>
      </div>
    );
  }
  
  private renderForEdgelessView(block: BaseBlock<any>): React.ReactNode {
    const edgelessLayout = this.layoutEngine.calculateEdgelessLayout(block);
    
    return (
      <div
        className="edgeless-view-item"
        style={{
          position: 'absolute',
          transform: `translate(${edgelessLayout.x}px, ${edgelessLayout.y}px)`,
          transformOrigin: '0 0'
        }}
        draggable
        onDragStart={this.handleDragStart}
        onDragEnd={this.handleDragEnd}
      >
        <DraggableContainer>
          <ResizableContainer
            width={edgelessLayout.width}
            height={edgelessLayout.height}
            onResize={this.handleResize}
          >
            <BlockContainer>
              {this.renderForEdgeless(block)}
            </BlockContainer>
          </ResizableContainer>
        </DraggableContainer>
      </div>
    );
  }
  
  private renderForEdgeless(block: BaseBlock<any>): React.ReactNode {
    // 为白板视图优化的渲染逻辑
    if (block instanceof TextBlock) {
      return <TextBlockEdgeless {...block.props} />;
    } else if (block instanceof DatabaseBlock) {
      return <DatabaseBlockMini {...block.props} />;
    } else if (block instanceof ImageBlock) {
      return <ImageBlockEdgeless {...block.props} />;
    }
    
    // 默认渲染
    return block.render();
  }
}

实时协作的CRDT实现：Yjs深度集成

AFFiNE的实时协作能力基于Conflict-free Replicated Data Type (CRDT)，使用Yjs作为核心实现。这种设计确保了分布式环境下的数据一致性。

CRDT数据结构设计

// 基于Yjs的协作数据结构
import * as Y from 'yjs';
import { Awareness } from 'y-protocols/awareness';

export class CollaborativeDoc {
  private ydoc: Y.Doc;
  private awareness: Awareness;
  private blocks: Y.Map<Y.Map<any>>;
  private metadata: Y.Map<any>;
  
  constructor() {
    this.ydoc = new Y.Doc();
    this.awareness = new Awareness(this.ydoc);
    
    // 初始化数据结构
    this.blocks = this.ydoc.getMap('blocks');
    this.metadata = this.ydoc.getMap('metadata');
    
    this.setupEventListeners();
  }
  
  private setupEventListeners(): void {
    // 监听块级变更
    this.blocks.observe(event => {
      event.changes.keys.forEach((change, key) => {
        if (change.action === 'add') {
          this.onBlockAdded(key, this.blocks.get(key)!);
        } else if (change.action === 'delete') {
          this.onBlockDeleted(key);
        } else if (change.action === 'update') {
          this.onBlockUpdated(key, this.blocks.get(key)!);
        }
      });
    });
  }
  
  // 添加新Block
  addBlock(blockId: string, blockData: any): void {
    this.ydoc.transact(() => {
      const blockMap = new Y.Map();
      
      // 将Block数据转换为Yjs结构
      Object.entries(blockData).forEach(([key, value]) => {
        blockMap.set(key, this.serializeValue(value));
      });
      
      this.blocks.set(blockId, blockMap);
    });
  }
  
  // 更新Block
  updateBlock(blockId: string, updates: Record<string, any>): void {
    this.ydoc.transact(() => {
      const blockMap = this.blocks.get(blockId);
      if (blockMap) {
        Object.entries(updates).forEach(([key, value]) => {
          blockMap.set(key, this.serializeValue(value));
        });
      }
    });
  }
  
  // 序列化管理Yjs数据
  private serializeValue(value: any): Y.Any {
    if (value === null || value === undefined) {
      return value;
    }
    
    if (typeof value === 'string' || typeof value === 'number' || typeof value === 'boolean') {
      return value;
    }
    
    if (Array.isArray(value)) {
      const yarr = new Y.Array();
      value.forEach(item => {
        yarr.push([this.serializeValue(item)]);
      });
      return yarr;
    }
    
    if (typeof value === 'object') {
      const ymap = new Y.Map();
      Object.entries(value).forEach(([key, val]) => {
        ymap.set(key, this.serializeValue(val));
      });
      return ymap;
    }
    
    return value;
  }
  
  // 反序列化管理Yjs数据
  private deserializeValue(yvalue: Y.Any): any {
    if (yvalue === null || yvalue === undefined) {
      return yvalue;
    }
    
    if (yvalue instanceof Y.Map) {
      const obj: Record<string, any> = {};
      yvalue.forEach((value, key) => {
        obj[key] = this.deserializeValue(value);
      });
      return obj;
    }
    
    if (yvalue instanceof Y.Array) {
      return yvalue.toArray().map(item => this.deserializeValue(item));
    }
    
    return yvalue;
  }
}

冲突解决与状态同步

// 冲突解决策略
export class ConflictResolver {
  // 基于时间戳的冲突解决
  static resolveByTimestamp<T>(local: T, remote: T, localTimestamp: number, remoteTimestamp: number): T {
    return remoteTimestamp > localTimestamp ? remote : local;
  }
  
  // 基于操作类型的冲突解决
  static resolveByOperationType(
    localOp: Operation, 
    remoteOp: Operation, 
    context: MergeContext
  ): MergeResult {
    
    // 不同操作类型的合并规则
    const mergeRules: Record<string, OperationMergeRule> = {
      'create+create': this.resolveCreateConflict,
      'update+update': this.resolveUpdateConflict,
      'delete+update': this.resolveDeleteUpdateConflict,
      'move+resize': this.resolveMoveResizeConflict
    };
    
    const ruleKey = `${localOp.type}+${remoteOp.type}`;
    const rule = mergeRules[ruleKey];
    
    if (rule) {
      return rule(localOp, remoteOp, context);
    }
    
    // 默认使用时间戳策略
    return {
      merged: this.resolveByTimestamp(localOp.data, remoteOp.data, localOp.timestamp, remoteOp.timestamp),
      source: 'timestamp'
    };
  }
  
  private static resolveCreateConflict(
    localOp: Operation, 
    remoteOp: Operation, 
    context: MergeContext
  ): MergeResult {
    // 创建冲突：使用唯一ID策略或位置分离
    if (localOp.targetId !== remoteOp.targetId) {
      return {
        merged: [localOp.data, remoteOp.data],
        source: 'id-different'
      };
    }
    
    // 相同ID的创建冲突：基于位置调整
    const adjustedLocal = this.adjustBlockPosition(localOp.data, context.positionConflict);
    const adjustedRemote = this.adjustBlockPosition(remoteOp.data, context.positionConflict);
    
    return {
      merged: [adjustedLocal, adjustedRemote],
      source: 'position-adjusted'
    };
  }
  
  private static resolveUpdateConflict(
    localOp: Operation, 
    remoteOp: Operation, 
    context: MergeContext
  ): MergeResult {
    // 更新冲突：字段级别合并
    const merged = { ...localOp.data };
    
    Object.keys(remoteOp.data).forEach(field => {
      if (context.fieldTimestamps[field] < remoteOp.timestamp) {
        merged[field] = remoteOp.data[field];
      }
    });
    
    return {
      merged,
      source: 'field-merge'
    };
  }
  
  // 位置调整算法
  private static adjustBlockPosition(block: any, conflict: PositionConflict): any {
    if (conflict.type === 'overlap') {
      // 解决重叠：智能位移
      return {
        ...block,
        position: {
          x: block.position.x + conflict.offsetX,
          y: block.position.y + conflict.offsetY
        }
      };
    }
    
    return block;
  }
}

本地优先架构的数据同步设计

AFFiNE采用"本地优先"的架构理念，确保用户数据始终首先存储在本地，同时支持跨设备同步。这种设计平衡了隐私保护与用户体验。

本地存储与同步策略

// 本地优先存储管理
export class LocalFirstStorage {
  private db: LocalDB;
  private syncManager: SyncManager;
  private conflictResolver: ConflictResolver;
  
  constructor() {
    this.db = new IndexedDBStorage('affine-local');
    this.syncManager = new SyncManager();
    this.conflictResolver = new ConflictResolver();
  }
  
  // 保存数据到本地
  async saveToLocal<T>(key: string, data: T): Promise<void> {
    try {
      // 1. 保存到本地数据库
      await this.db.put(key, {
        data,
        timestamp: Date.now(),
        version: this.getCurrentVersion()
      });
      
      // 2. 触发本地事件
      document.dispatchEvent(new CustomEvent('local:update', {
        detail: { key, data, timestamp: Date.now() }
      }));
      
      // 3. 异步同步到云端
      this.syncManager.queueSync(key, data);
      
    } catch (error) {
      console.error('本地保存失败:', error);
      throw new Error('数据保存失败');
    }
  }
  
  // 同步冲突解决
  async resolveSyncConflict(localData: any, remoteData: any): Promise<any> {
    const localVersion = localData.version || 0;
    const remoteVersion = remoteData.version || 0;
    
    if (localVersion === remoteVersion) {
      // 版本相同，需要更深入的冲突分析
      return this.conflictResolver.resolveByOperationType(
        localData.operations, 
        remoteData.operations, 
        this.createMergeContext(localData, remoteData)
      );
    }
    
    // 版本不同，使用时间戳策略
    return this.conflictResolver.resolveByTimestamp(
      localData.data, 
      remoteData.data, 
      localData.timestamp, 
      remoteData.timestamp
    );
  }
  
  // 离线操作队列
  async queueOfflineOperation(operation: OfflineOperation): Promise<void> {
    const queue = await this.db.get('offline-queue') || [];
    queue.push({
      ...operation,
      id: generateId(),
      queuedAt: Date.now()
    });
    
    await this.db.put('offline-queue', queue);
    
    // 尝试立即同步
    this.syncManager.attemptSync();
  }
}

// 跨设备同步管理
export class SyncManager {
  private syncQueue: Map<string, SyncTask> = new Map();
  private syncInterval: NodeJS.Timeout;
  private isOnline: boolean = navigator.onLine;
  
  constructor() {
    this.setupNetworkListeners();
    this.syncInterval = setInterval(() => {
      this.processSyncQueue();
    }, 5000); // 每5秒尝试同步一次
  }
  
  // 网络状态监听
  private setupNetworkListeners(): void {
    window.addEventListener('online', () => {
      this.isOnline = true;
      this.processSyncQueue();
    });
    
    window.addEventListener('offline', () => {
      this.isOnline = false;
    });
  }
  
  // 队列同步任务
  async queueSync(key: string, data: any): Promise<void> {
    const task: SyncTask = {
      key,
      data,
      attempts: 0,
      priority: this.calculatePriority(data),
      createdAt: Date.now()
    };
    
    this.syncQueue.set(key, task);
    
    // 高优先级任务立即尝试同步
    if (task.priority === 'high' && this.isOnline) {
      this.processTask(task);
    }
  }
  
  // 处理同步队列
  private async processSyncQueue(): Promise<void> {
    if (!this.isOnline || this.syncQueue.size === 0) {
      return;
    }
    
    // 按优先级排序
    const tasks = Array.from(this.syncQueue.values())
      .sort((a, b) => b.priority - a.priority)
      .slice(0, 5); // 每次最多处理5个任务
    
    for (const task of tasks) {
      await this.processTask(task);
    }
  }
  
  // 处理单个同步任务
  private async processTask(task: SyncTask): Promise<void> {
    try {
      task.attempts++;
      
      const result = await this.performSync(task);
      
      if (result.success) {
        this.syncQueue.delete(task.key);
        document.dispatchEvent(new CustomEvent('sync:success', {
          detail: { key: task.key, result }
        }));
      } else {
        // 同步失败，检查是否需要重试
        if (task.attempts < this.maxAttempts && this.shouldRetry(task, result)) {
          task.nextRetryAt = Date.now() + this.calculateRetryDelay(task);
        } else {
          this.syncQueue.delete(task.key);
          document.dispatchEvent(new CustomEvent('sync:failure', {
            detail: { key: task.key, error: result.error }
          }));
        }
      }
    } catch (error) {
      console.error('同步任务处理失败:', error);
    }
  }
}

AI集成的架构设计

AFFiNE通过Canvas AI概念，将AI能力深度集成到文档编辑和白板创作中，实现了智能化的内容生成和优化。

AI工作流引擎

// AI工作流引擎
export class AIWorkflowEngine {
  private aiProviders: Map<string, AIProvider> = new Map();
  private workflowQueue: PriorityQueue<AIWorkflow> = new Queue();
  private contextManager: ContextManager;
  
  constructor() {
    this.contextManager = new ContextManager();
    this.initializeAIProviders();
  }
  
  // 初始化AI提供商
  private initializeAIProviders(): void {
    // 支持多种AI模型
    this.aiProviders.set('openai', new OpenAIProvider());
    this.aiProviders.set('claude', new ClaudeProvider());
    this.aiProviders.set('local', new LocalAIProvider());
  }
  
  // AI工作流执行
  async executeWorkflow(workflow: AIWorkflow): Promise<AIResult> {
    // 1. 构建上下文
    const context = await this.contextManager.buildContext(workflow.context);
    
    // 2. 选择AI模型
    const provider = this.selectOptimalProvider(workflow, context);
    
    // 3. 执行AI任务
    const result = await provider.execute(workflow.prompt, context);
    
    // 4. 结果处理与集成
    return this.processAIResult(result, workflow);
  }
  
  // 上下文感知的内容生成
  async generateContextualContent(
    blockType: string, 
    currentContent: string,
    workspace: WorkspaceContext
  ): Promise<string> {
    const contextualPrompt = this.buildContextualPrompt(blockType, currentContent, workspace);
    
    const workflow: AIWorkflow = {
      type: 'generate',
      prompt: contextualPrompt,
      context: {
        blockType,
        currentContent,
        workspace,
        recentBlocks: await this.getRecentBlocks(workspace.currentPage),
        userPreferences: workspace.user.preferences
      },
      options: {
        maxTokens: 500,
        temperature: 0.7,
        blockType: blockType
      }
    };
    
    return this.executeWorkflow(workflow);
  }
  
  // 智能布局优化
  async optimizeEdgelessLayout(blocks: BlockNode[]): Promise<LayoutOptimization[]> {
    const optimizationWorkflow: AIWorkflow = {
      type: 'optimize-layout',
      prompt: this.buildLayoutOptimizationPrompt(blocks),
      context: {
        blocks,
        canvasSize: { width: 1920, height: 1080 },
        viewportConstraints: { minMargin: 20, preferredSpacing: 40 },
        userInteractionHistory: await this.getUserLayoutPreferences()
      },
      options: {
        algorithm: 'genetic',
        iterations: 100,
        populationSize: 50
      }
    };
    
    const result = await this.executeWorkflow(optimizationWorkflow);
    return this.parseLayoutOptimization(result.content);
  }
  
  private buildContextualPrompt(blockType: string, content: string, workspace: WorkspaceContext): string {
    const templates = {
      text: `作为写作助手，请优化以下文本内容：\n\n${content}\n\n基于当前工作区的上下文：\n${JSON.stringify(workspace.recentActivity, null, 2)}`,
      
      database: `作为数据分析助手，基于以下数据库上下文，生成相关的洞察和建议：\n\n数据内容：\n${content}\n\n工作区信息：\n${JSON.stringify(workspace.pageContext, null, 2)}`,
      
      mindmap: `作为思维导图专家，基于以下内容创建思维导图的结构：\n\n核心内容：\n${content}\n\n用户角色：\n${workspace.user.role}\n项目类型：\n${workspace.pageContext.projectType}`
    };
    
    return templates[blockType] || templates.text;
  }
}

性能优化与工程实践

虚拟化渲染

// 大数据集的虚拟化渲染
export class VirtualizedRenderer {
  private containerRef: React.RefObject<HTMLDivElement>;
  private viewportHeight: number;
  private itemHeight: number;
  private overscan: number = 5;
  
  renderVisibleBlocks(blocks: BlockNode[], scrollTop: number): React.ReactNode {
    const startIndex = Math.floor(scrollTop / this.itemHeight);
    const endIndex = Math.min(
      startIndex + Math.ceil(this.viewportHeight / this.itemHeight) + this.overscan,
      blocks.length
    );
    
    const visibleBlocks = blocks.slice(startIndex, endIndex);
    
    return (
      <div 
        style={{ 
          height: blocks.length * this.itemHeight,
          position: 'relative' 
        }}
      >
        {visibleBlocks.map((block, index) => (
          <div
            key={block.id}
            style={{
              position: 'absolute',
              top: (startIndex + index) * this.itemHeight,
              left: 0,
              right: 0,
              height: this.itemHeight
            }}
          >
            {this.renderBlock(block)}
          </div>
        ))}
      </div>
    );
  }
}

内存优化策略

// 内存优化的Block管理
export class OptimizedBlockManager {
  private blockCache: LRUCache<string, BlockNode> = new LRUCache(1000);
  private lazyLoader: LazyBlockLoader;
  
  // 懒加载Block内容
  async loadBlock(id: string): Promise<BlockNode | null> {
    // 检查缓存
    const cached = this.blockCache.get(id);
    if (cached) {
      return cached;
    }
    
    // 从存储中懒加载
    const block = await this.lazyLoader.loadBlock(id);
    if (block) {
      this.blockCache.set(id, block);
    }
    
    return block;
  }
  
  // 智能缓存淘汰
  private handleMemoryPressure(): void {
    if (performance.memory) {
      const memoryInfo = performance.memory;
      const usedPercentage = memoryInfo.usedJSHeapSize / memoryInfo.jsHeapSizeLimit;
      
      if (usedPercentage > 0.8) {
        // 内存使用率超过80%，清理缓存
        this.blockCache.clear();
        this.triggerGarbageCollection();
      }
    }
  }
}

结语

AFFiNE通过TypeScript+Rust的混合架构，实现了文档编辑与可视化白板的无缝融合，为知识管理工具开辟了新的技术路径。其块级架构设计不仅继承了Notion"万物皆模块"的理念，更在工程实现上实现了跨视图的动态渲染和协同编辑。

项目的成功证明了开源技术在复杂应用场景下的可行性。从Rust后端的高性能数据处理，到TypeScript前端的复杂交互逻辑，再到CRDT实现的实时协作能力，每一个技术决策都体现了工程实践的深度思考。

随着AI技术的深度集成和本地优先理念的推广，AFFiNE不仅是一个工具产品，更是下一代知识管理架构的技术实验场。它为开发者提供了宝贵的混合架构实践经验，也为知识管理领域的技术演进指明了方向。

参考资料：

AFFiNE官方仓库：https://github.com/toeverything/AFFiNE
BlockSuite项目：https://github.com/toeverything/BlockSuite
OctoBase数据库：https://github.com/toeverything/OctoBase