`
xiaoheliushuiya
  • 浏览: 403761 次
文章分类
社区版块
存档分类
最新评论

使用Apworks开发基于CQRS架构的应用程序【创建领域模型项目】

 
阅读更多

领域模型是应用程序的核心,它包括了领域对象、状态、方法、事件、业务逻辑以及对象之间的关系。现在,我们来为Tiny Library CQRS创建一个领域模型项目。

  1. Solution Explorer下,右键单击TinyLibraryCQRS项目,单击Add | New Project…菜单,这将打开Add New Project对话框
  2. Installed Templates选项卡下,选择Visual C# | Windows,然后选择Class Library,确保所选的Framework版本是.NET Framework 4,在Name文本框中,输入TinyLibrary.Domain,然后单击OK按钮
  3. Solution Explorer下,右键单击TinyLibrary.Domain项目的References节点,单击Add Reference…菜单,这将打开Add Reference对话框
  4. .NET选项卡下,选择Apworks然后单击OK按钮
    AddApworksReferenceDialog
  5. TinyLibrary.Domain项目下,创建一个Book类,由于它是聚合根,因此使其继承于SourcedAggregateRoot
       1: using System;
       2: using Apworks;
       3: using Apworks.Snapshots;
       4: 
       5: namespace TinyLibrary.Domain
       6: {
       7:     public class Book : SourcedAggregateRoot
       8:     {
       9:         public string Title { get; private set; }
      10:         public string Publisher { get; private set; }
      11:         public DateTime PubDate { get; private set; }
      12:         public string ISBN { get; private set; }
      13:         public int Pages { get; private set; }
      14:         public bool Lent { get; private set; }
      15: 
      16:         public Book() : base() {  }
      17:         public Book(long id) : base(id) {  }
      18: 
      19:         protected override void DoBuildFromSnapshot(ISnapshot snapshot)
      20:         {
      21:             throw new NotImplementedException();
      22:         }
      23: 
      24:         protected override ISnapshot DoCreateSnapshot()
      25:         {
      26:             throw new NotImplementedException();
      27:         }
      28:     }
      29: }
  6. 同理,在TinyLibrary.Domain项目下,创建一个Reader
       1: using System;
       2: using System.Collections.Generic;
       3: using Apworks;
       4: using Apworks.Snapshots;
       5: 
       6: namespace TinyLibrary.Domain
       7: {
       8:     public class Reader : SourcedAggregateRoot
       9:     {
      10:         public string LoginName { get; private set; }
      11:         public string Name { get; private set; }
      12:         public List<Book> Books { get; private set; }
      13: 
      14:         public Reader() : base() { Books = new List<Book>(); }
      15: 
      16:         public Reader(long id) : base(id) { Books = new List<Book>(); }
      17: 
      18:         protected override void DoBuildFromSnapshot(ISnapshot snapshot)
      19:         {
      20:              throw new NotImplementedException();
      21:         }
      22: 
      23:         protected override ISnapshot DoCreateSnapshot()
      24:         {
      25:              throw new NotImplementedException();
      26:         }
      27:     }
      28: }

从上面两段代码可以看出,有两个protected的方法我们还没有实现,这两个方法是定义在SourcedAggregateRoot基类中的,用来提供与“快照”相关的功能。“快照”是CQRS架构中非常重要的一部分,在下一章节中,我们将了解到,如何为我们的领域模型添加快照功能。

分享到:
评论

相关推荐

Global site tag (gtag.js) - Google Analytics