{"id":276,"date":"2026-10-06T11:50:46","date_gmt":"2026-10-06T03:50:46","guid":{"rendered":"https:\/\/yykcj.com\/?p=276"},"modified":"2026-10-06T11:50:46","modified_gmt":"2026-10-06T03:50:46","slug":"cqrs-%e6%a8%a1%e5%bc%8f%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bb%8e%e7%90%86%e8%ae%ba%e5%88%b0%e8%90%bd%e5%9c%b0%ef%bc%8c%e6%9e%84%e5%bb%ba%e5%8f%af%e6%89%a9%e5%b1%95%e7%9a%84%e8%ae%a2%e5%8d%95%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/yykcj.com\/?p=276","title":{"rendered":"CQRS \u6a21\u5f0f\u5b9e\u6218\uff1a\u4ece\u7406\u8bba\u5230\u843d\u5730\uff0c\u6784\u5efa\u53ef\u6269\u5c55\u7684\u8ba2\u5355\u7cfb\u7edf"},"content":{"rendered":"<h2>\u4e3a\u4ec0\u4e48\u4f60\u9700\u8981\u5173\u6ce8 CQRS\uff1f<\/h2>\n<p>\u5728\u4f20\u7edf\u7684 CRUD \u67b6\u6784\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u4f7f\u7528\u540c\u4e00\u4e2a\u6a21\u578b\u6765\u5904\u7406\u8bfb\u5199\u64cd\u4f5c\u3002\u4f46\u968f\u7740\u4e1a\u52a1\u590d\u6742\u5ea6\u589e\u52a0\uff0c\u8bfb\u5199\u9700\u6c42\u5f80\u5f80\u4e0d\u5bf9\u79f0\uff1a\u8bfb\u64cd\u4f5c\u53ef\u80fd\u8fdc\u591a\u4e8e\u5199\u64cd\u4f5c\uff0c\u4e14\u67e5\u8be2\u903b\u8f91\u590d\u6742\u591a\u53d8\uff08\u5982\u591a\u7ef4\u5ea6\u7b5b\u9009\u3001\u805a\u5408\u7edf\u8ba1\uff09\uff0c\u800c\u5199\u64cd\u4f5c\u5219\u6ce8\u91cd\u4e1a\u52a1\u89c4\u5219\u548c\u4e00\u81f4\u6027\u3002\u5f3a\u884c\u7528\u540c\u4e00\u6a21\u578b\u5e94\u5bf9\uff0c\u4f1a\u5bfc\u81f4\u4ee3\u7801\u81c3\u80bf\u3001\u6027\u80fd\u74f6\u9888\u548c\u96be\u4ee5\u7ef4\u62a4\u3002<\/p>\n<p>CQRS\uff08Command Query Responsibility Segregation\uff0c\u547d\u4ee4\u67e5\u8be2\u804c\u8d23\u5206\u79bb\uff09\u6b63\u662f\u89e3\u51b3\u8fd9\u4e00\u75db\u70b9\u7684\u6a21\u5f0f\u3002\u5b83\u4e3b\u5f20\u5c06<strong>\u547d\u4ee4\uff08\u5199\u64cd\u4f5c\uff09<\/strong>\u548c<strong>\u67e5\u8be2\uff08\u8bfb\u64cd\u4f5c\uff09<\/strong>\u5206\u79bb\uff0c\u4f7f\u7528\u4e0d\u540c\u7684\u6a21\u578b\u751a\u81f3\u4e0d\u540c\u7684\u5b58\u50a8\uff0c\u4ece\u800c\u8ba9\u7cfb\u7edf\u66f4\u7075\u6d3b\u3001\u53ef\u6269\u5c55\u3002<\/p>\n<p>\u672c\u6587\u5c06\u4ee5\u4e00\u4e2a\u7b80\u5355\u7684\u8ba2\u5355\u7cfb\u7edf\u4e3a\u4f8b\uff0c\u5e26\u4f60\u4ece\u96f6\u5b9e\u73b0 CQRS\u3002\u4f60\u5c06\u5b66\u5230\uff1a<\/p>\n<ul>\n<li>CQRS \u7684\u6838\u5fc3\u6982\u5ff5\u4e0e\u9002\u7528\u573a\u666f<\/li>\n<li>\u5982\u4f55\u8bbe\u8ba1\u547d\u4ee4\u4e0e\u67e5\u8be2\u6a21\u578b<\/li>\n<li>\u4f7f\u7528\u4e8b\u4ef6\u9a71\u52a8\u540c\u6b65\u8bfb\u5199\u5b58\u50a8<\/li>\n<li>\u5b9e\u6218\u4e2d\u5e38\u89c1\u7684\u5751\u4e0e\u89e3\u51b3\u65b9\u6848<\/li>\n<li>\u4f55\u65f6\u4e0d\u8be5\u4f7f\u7528 CQRS<\/li>\n<\/ul>\n<h2>\u6848\u4f8b\u80cc\u666f\uff1a\u8ba2\u5355\u7cfb\u7edf<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u8ba2\u5355\u670d\u52a1\uff0c\u9700\u6c42\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u7528\u6237\u53ef\u521b\u5efa\u8ba2\u5355\u3001\u652f\u4ed8\u8ba2\u5355\u3001\u53d6\u6d88\u8ba2\u5355\u3002<\/li>\n<li>\u540e\u53f0\u9700\u8981\u67e5\u8be2\u8ba2\u5355\u5217\u8868\uff0c\u652f\u6301\u6309\u72b6\u6001\u3001\u7528\u6237\u3001\u65f6\u95f4\u8303\u56f4\u8fc7\u6ee4\uff0c\u5e76\u5c55\u793a\u5546\u54c1\u8be6\u60c5\u3002<\/li>\n<li>\u8ba2\u5355\u91cf\u8f83\u5927\uff0c\u8bfb\u8bf7\u6c42\u8fdc\u591a\u4e8e\u5199\u8bf7\u6c42\u3002<\/li>\n<\/ul>\n<p>\u4f20\u7edf\u505a\u6cd5\u662f\u7528\u4e00\u4e2a <code>Order<\/code> \u5b9e\u4f53\uff0c\u540c\u65f6\u5904\u7406\u8bfb\u5199\u3002\u4f46\u67e5\u8be2\u65f6\u9700\u8981\u5173\u8054\u5546\u54c1\u3001\u7528\u6237\u7b49\u4fe1\u606f\uff0c\u5199\u64cd\u4f5c\u9700\u8981\u6821\u9a8c\u4e1a\u52a1\u89c4\u5219\u3002\u968f\u7740\u65f6\u95f4\u63a8\u79fb\uff0c\u4ee3\u7801\u4f1a\u53d8\u5f97\u6df7\u4e71\u3002\u6211\u4eec\u51b3\u5b9a\u91c7\u7528 CQRS\u3002<\/p>\n<h2>\u7b2c\u4e00\u6b65\uff1a\u5b9a\u4e49\u547d\u4ee4\u4e0e\u67e5\u8be2<\/h2>\n<p>\u547d\u4ee4\u8868\u793a\u201c\u505a\u4ec0\u4e48\u201d\uff0c\u901a\u5e38\u8fd4\u56de void \u6216\u7b80\u5355\u7ed3\u679c\uff1b\u67e5\u8be2\u8868\u793a\u201c\u8981\u4ec0\u4e48\u201d\uff0c\u8fd4\u56de\u6570\u636e\u3002\u6211\u4eec\u4f7f\u7528 TypeScript \u6765\u6f14\u793a\uff0c\u4f46\u601d\u60f3\u9002\u7528\u4e8e\u4efb\u4f55\u8bed\u8a00\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u547d\u4ee4\u63a5\u53e3\ninterface Command {\n  readonly type: string;\n}\n\n\/\/ \u67e5\u8be2\u63a5\u53e3\ninterface Query {\n  readonly type: string;\n}\n\n\/\/ \u5177\u4f53\u547d\u4ee4\nexport class CreateOrderCommand implements Command {\n  readonly type = &#x27;CreateOrder&#x27;;\n  constructor(\n    public readonly orderId: string,\n    public readonly userId: string,\n    public readonly items: Array&lt;{ productId: string; quantity: number; price: number }&gt;\n  ) {}\n}\n\nexport class PayOrderCommand implements Command {\n  readonly type = &#x27;PayOrder&#x27;;\n  constructor(public readonly orderId: string) {}\n}\n\n\/\/ \u5177\u4f53\u67e5\u8be2\nexport class GetOrdersQuery implements Query {\n  readonly type = &#x27;GetOrders&#x27;;\n  constructor(\n    public readonly userId?: string,\n    public readonly status?: string,\n    public readonly startDate?: Date,\n    public readonly endDate?: Date\n  ) {}\n}\n<\/code><\/pre>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a\u547d\u4ee4\u548c\u67e5\u8be2\u5e94\u8be5\u662f\u4e0d\u53ef\u53d8\u7684\u6570\u636e\u5bf9\u8c61\uff0c\u4ec5\u5305\u542b\u6267\u884c\u6240\u9700\u7684\u4fe1\u606f\uff0c\u4e0d\u5305\u542b\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<h2>\u7b2c\u4e8c\u6b65\uff1a\u8bbe\u8ba1\u5199\u6a21\u578b\uff08\u547d\u4ee4\u7aef\uff09<\/h2>\n<p>\u5199\u6a21\u578b\u8d1f\u8d23\u5904\u7406\u4e1a\u52a1\u89c4\u5219\uff0c\u7ef4\u62a4\u9886\u57df\u72b6\u6001\u3002\u6211\u4eec\u4f7f\u7528\u9886\u57df\u9a71\u52a8\u8bbe\u8ba1\uff08DDD\uff09\u4e2d\u7684\u805a\u5408\u6839\u6982\u5ff5\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u8ba2\u5355\u72b6\u6001\nexport enum OrderStatus {\n  Created = &#x27;created&#x27;,\n  Paid = &#x27;paid&#x27;,\n  Cancelled = &#x27;cancelled&#x27;,\n}\n\n\/\/ \u8ba2\u5355\u805a\u5408\u6839\nexport class Order {\n  private _status: OrderStatus = OrderStatus.Created;\n  private _items: Array&lt;{ productId: string; quantity: number; price: number }&gt; = [];\n\n  constructor(public readonly id: string, public readonly userId: string) {}\n\n  get status() { return this._status; }\n  get items() { return this._items; }\n\n  addItem(productId: string, quantity: number, price: number) {\n    if (this._status !== OrderStatus.Created) {\n      throw new Error(&#x27;\u53ea\u80fd\u5728\u521b\u5efa\u72b6\u6001\u4e0b\u6dfb\u52a0\u5546\u54c1&#x27;);\n    }\n    if (quantity &lt;= 0) throw new Error(&#x27;\u6570\u91cf\u5fc5\u987b\u5927\u4e8e0&#x27;);\n    this._items.push({ productId, quantity, price });\n  }\n\n  pay() {\n    if (this._status !== OrderStatus.Created) {\n      throw new Error(&#x27;\u8ba2\u5355\u72b6\u6001\u4e0d\u5141\u8bb8\u652f\u4ed8&#x27;);\n    }\n    if (this._items.length === 0) {\n      throw new Error(&#x27;\u8ba2\u5355\u4e0d\u80fd\u4e3a\u7a7a&#x27;);\n    }\n    this._status = OrderStatus.Paid;\n  }\n\n  cancel() {\n    if (this._status === OrderStatus.Paid) {\n      throw new Error(&#x27;\u5df2\u652f\u4ed8\u8ba2\u5355\u4e0d\u80fd\u53d6\u6d88&#x27;);\n    }\n    this._status = OrderStatus.Cancelled;\n  }\n}\n<\/code><\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u5b9e\u73b0\u547d\u4ee4\u5904\u7406\u5668\u3002\u6bcf\u4e2a\u547d\u4ee4\u5bf9\u5e94\u4e00\u4e2a\u5904\u7406\u5668\uff0c\u8d1f\u8d23\u52a0\u8f7d\u805a\u5408\u3001\u6267\u884c\u4e1a\u52a1\u903b\u8f91\u3001\u4fdd\u5b58\u5e76\u53d1\u5e03\u4e8b\u4ef6\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u4e8b\u4ef6\u5b58\u50a8\u63a5\u53e3\uff08\u7b80\u5316\u7248\uff09\ninterface EventStore {\n  saveEvents(aggregateId: string, events: any[], expectedVersion: number): Promise&lt;void&gt;;\n  getEvents(aggregateId: string): Promise&lt;any[]&gt;;\n}\n\n\/\/ \u4e8b\u4ef6\u53d1\u5e03\u5668\ninterface EventPublisher {\n  publish(event: any): Promise&lt;void&gt;;\n}\n\n\/\/ \u547d\u4ee4\u5904\u7406\u5668\nexport class CreateOrderHandler {\n  constructor(\n    private eventStore: EventStore,\n    private publisher: EventPublisher\n  ) {}\n\n  async handle(command: CreateOrderCommand): Promise&lt;void&gt; {\n    const order = new Order(command.orderId, command.userId);\n    command.items.forEach(item =&gt; order.addItem(item.productId, item.quantity, item.price));\n\n    const events = [\n      {\n        type: &#x27;OrderCreated&#x27;,\n        aggregateId: order.id,\n        userId: order.userId,\n        items: order.items,\n        timestamp: new Date(),\n      },\n    ];\n\n    await this.eventStore.saveEvents(order.id, events, -1); \/\/ -1 \u8868\u793a\u65b0\u805a\u5408\n    for (const event of events) {\n      await this.publisher.publish(event);\n    }\n  }\n}\n<\/code><\/pre>\n<p><strong>\ud83d\udca1 \u63d0\u793a<\/strong>\uff1a\u8fd9\u91cc\u6211\u4eec\u7b80\u5355\u5730\u5c06\u805a\u5408\u72b6\u6001\u76f4\u63a5\u4fdd\u5b58\u4e3a\u4e8b\u4ef6\uff0c\u5b9e\u9645\u9879\u76ee\u4e2d\u53ef\u4ee5\u4f7f\u7528\u4e8b\u4ef6\u6eaf\u6e90\uff08Event Sourcing\uff09\u6301\u4e45\u5316\u6240\u6709\u72b6\u6001\u53d8\u5316\u3002\u4e3a\u4e86\u7b80\u5316\uff0c\u672c\u6587\u4e0d\u6df1\u5165\u4e8b\u4ef6\u6eaf\u6e90\u3002<\/p>\n<h2>\u7b2c\u4e09\u6b65\uff1a\u8bbe\u8ba1\u8bfb\u6a21\u578b\uff08\u67e5\u8be2\u7aef\uff09<\/h2>\n<p>\u8bfb\u6a21\u578b\u4e13\u6ce8\u4e8e\u67e5\u8be2\u6027\u80fd\uff0c\u901a\u5e38\u4f7f\u7528\u53cd\u8303\u5f0f\u5316\u7684\u6570\u636e\u8868\u6216\u6587\u6863\u3002\u6211\u4eec\u4e3a\u8ba2\u5355\u5217\u8868\u521b\u5efa\u4e00\u4e2a\u8bfb\u6a21\u578b\uff0c\u5305\u542b\u8ba2\u5355\u57fa\u672c\u4fe1\u606f\u548c\u5546\u54c1\u8be6\u60c5\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u8bfb\u6a21\u578b\u6570\u636e\u5e93\u8868\uff08\u8fd9\u91cc\u7528\u5185\u5b58\u6a21\u62df\uff09\nexport class OrderReadModel {\n  private orders: Map&lt;string, any&gt; = new Map();\n\n  async upsert(order: any) {\n    this.orders.set(order.id, order);\n  }\n\n  async find(query: GetOrdersQuery): Promise&lt;any[]&gt; {\n    let results = Array.from(this.orders.values());\n    if (query.userId) {\n      results = results.filter(o =&gt; o.userId === query.userId);\n    }\n    if (query.status) {\n      results = results.filter(o =&gt; o.status === query.status);\n    }\n    if (query.startDate) {\n      results = results.filter(o =&gt; o.createdAt &gt;= query.startDate);\n    }\n    if (query.endDate) {\n      results = results.filter(o =&gt; o.createdAt &lt;= query.endDate);\n    }\n    return results;\n  }\n}\n<\/code><\/pre>\n<p>\u67e5\u8be2\u5904\u7406\u5668\u76f4\u63a5\u8c03\u7528\u8bfb\u6a21\u578b\uff1a<\/p>\n<pre><code class=\"language-typescript\">\nexport class GetOrdersHandler {\n  constructor(private readModel: OrderReadModel) {}\n\n  async handle(query: GetOrdersQuery): Promise&lt;any[]&gt; {\n    return this.readModel.find(query);\n  }\n}\n<\/code><\/pre>\n<h2>\u7b2c\u56db\u6b65\uff1a\u540c\u6b65\u8bfb\u5199\u6a21\u578b\uff08\u4e8b\u4ef6\u9a71\u52a8\uff09<\/h2>\n<p>\u5199\u6a21\u578b\u4ea7\u751f\u4e8b\u4ef6\u540e\uff0c\u9700\u8981\u66f4\u65b0\u8bfb\u6a21\u578b\u3002\u6211\u4eec\u4f7f\u7528\u4e00\u4e2a\u4e8b\u4ef6\u8ba2\u9605\u8005\u6765\u76d1\u542c\u4e8b\u4ef6\u5e76\u66f4\u65b0\u8bfb\u6a21\u578b\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u4e8b\u4ef6\u8ba2\u9605\u8005\nexport class OrderProjection {\n  constructor(private readModel: OrderReadModel) {}\n\n  async handle(event: any): Promise&lt;void&gt; {\n    switch (event.type) {\n      case &#x27;OrderCreated&#x27;:\n        await this.readModel.upsert({\n          id: event.aggregateId,\n          userId: event.userId,\n          status: &#x27;created&#x27;,\n          items: event.items,\n          createdAt: event.timestamp,\n          updatedAt: event.timestamp,\n        });\n        break;\n      case &#x27;OrderPaid&#x27;:\n        const order = await this.readModel.find({} as GetOrdersQuery).then(orders =&gt; orders.find(o =&gt; o.id === event.aggregateId));\n        if (order) {\n          order.status = &#x27;paid&#x27;;\n          order.updatedAt = event.timestamp;\n          await this.readModel.upsert(order);\n        }\n        break;\n      case &#x27;OrderCancelled&#x27;:\n        \/\/ \u7c7b\u4f3c\u5904\u7406\n        break;\n    }\n  }\n}\n<\/code><\/pre>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a\u8bfb\u6a21\u578b\u66f4\u65b0\u53ef\u80fd\u5931\u8d25\uff0c\u9700\u8981\u91cd\u8bd5\u673a\u5236\u548c\u5e42\u7b49\u5904\u7406\u3002\u4e8b\u4ef6\u5e94\u81f3\u5c11\u6295\u9012\u4e00\u6b21\uff0c\u56e0\u6b64\u8ba2\u9605\u8005\u5fc5\u987b\u5e42\u7b49\u3002<\/p>\n<h2>\u7b2c\u4e94\u6b65\uff1a\u7ec4\u88c5\u4e0e\u6d4b\u8bd5<\/h2>\n<p>\u73b0\u5728\u6211\u4eec\u628a\u6240\u6709\u7ec4\u4ef6\u7ec4\u88c5\u8d77\u6765\uff0c\u6a21\u62df\u4e00\u6b21\u5b8c\u6574\u7684\u8ba2\u5355\u6d41\u7a0b\u3002<\/p>\n<pre><code class=\"language-typescript\">\n\/\/ \u7b80\u5355\u7684\u5185\u5b58\u4e8b\u4ef6\u5b58\u50a8\u548c\u53d1\u5e03\u5668\nclass InMemoryEventStore implements EventStore {\n  private events: Map&lt;string, any[]&gt; = new Map();\n  async saveEvents(aggregateId: string, events: any[], expectedVersion: number) {\n    const existing = this.events.get(aggregateId) || [];\n    if (existing.length !== expectedVersion + 1) {\n      throw new Error(&#x27;\u5e76\u53d1\u51b2\u7a81&#x27;);\n    }\n    this.events.set(aggregateId, [...existing, ...events]);\n  }\n  async getEvents(aggregateId: string) {\n    return this.events.get(aggregateId) || [];\n  }\n}\n\nclass SimpleEventPublisher implements EventPublisher {\n  private subscribers: Array&lt;(event: any) =&gt; void&gt; = [];\n  subscribe(handler: (event: any) =&gt; void) {\n    this.subscribers.push(handler);\n  }\n  async publish(event: any) {\n    for (const sub of this.subscribers) {\n      await sub(event);\n    }\n  }\n}\n\n\/\/ \u7ec4\u88c5\nconst eventStore = new InMemoryEventStore();\nconst publisher = new SimpleEventPublisher();\nconst readModel = new OrderReadModel();\nconst projection = new OrderProjection(readModel);\npublisher.subscribe(event =&gt; projection.handle(event));\n\nconst createOrderHandler = new CreateOrderHandler(eventStore, publisher);\nconst getOrdersHandler = new GetOrdersHandler(readModel);\n\n\/\/ \u6267\u884c\u547d\u4ee4\n(async () =&gt; {\n  await createOrderHandler.handle(\n    new CreateOrderCommand(&#x27;order-1&#x27;, &#x27;user-1&#x27;, [\n      { productId: &#x27;p1&#x27;, quantity: 2, price: 100 },\n    ])\n  );\n\n  \/\/ \u67e5\u8be2\n  const orders = await getOrdersHandler.handle(new GetOrdersQuery(&#x27;user-1&#x27;));\n  console.log(orders);\n})();\n<\/code><\/pre>\n<p>\u8fd0\u884c\u540e\uff0c\u4f60\u4f1a\u770b\u5230\u67e5\u8be2\u7ed3\u679c\u5305\u542b\u4e86\u521a\u521b\u5efa\u7684\u8ba2\u5355\u3002\u8fd9\u8bc1\u660e\u4e86\u8bfb\u5199\u5206\u79bb\u7684\u6d41\u7a0b\u662f\u901a\u7684\u3002<\/p>\n<h2>\u5e38\u89c1\u5751\u4e0e\u6700\u4f73\u5b9e\u8df5<\/h2>\n<ol>\n<li><strong>\u6700\u7ec8\u4e00\u81f4\u6027<\/strong>\uff1aCQRS \u901a\u5e38\u5bfc\u81f4\u8bfb\u5199\u5ef6\u8fdf\u3002\u5bf9\u4e8e\u9700\u8981\u5f3a\u4e00\u81f4\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u5728\u547d\u4ee4\u5904\u7406\u540e\u540c\u6b65\u66f4\u65b0\u8bfb\u6a21\u578b\uff0c\u4f46\u4f1a\u5931\u53bb\u89e3\u8026\u4f18\u52bf\u3002\u5efa\u8bae\u5728 UI 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