ABP框架代码组织方式咨询：分层包与组件式包的支持及应用情况

First off, let's clarify: ABP Framework fully supports both package-by-layer and package-by-component structures—the framework doesn't enforce one over the other. That said, there are clear differences in how widely each is used, and scenarios where one makes more sense than the other.

1. Package by Layer: The More Common Approach Today #

Package-by-layer is definitely the more widely adopted structure in the ABP ecosystem right now, and here's why:

• Official Guidance & Examples: All of ABP's official templates (like the default BookStore template), documentation, and sample projects use this layered structure. This means new developers have a clear starting point, and most community discussions, tutorials, and troubleshooting resources are built around this pattern.
• Lower Learning Curve: It's intuitive for teams that are new to ABP or domain-driven design (DDD) concepts. Separating code into Core, Application, EntityFrameworkCore, etc., makes it easy to grasp the responsibility of each layer upfront.
• Great for Small-to-Medium Projects: For projects with relatively simple domain boundaries or smaller teams, this structure keeps things organized without adding unnecessary complexity.

A quick recap of the typical package-by-layer structure you shared:

Project.sln
├─Project.Application
│  ├─OrderContext
│  ├─ProductContext
│  └─CustomerContext
├─Project.Core
│  ├─OrderContext
│  ├─ProductContext
│  └─CustomerContext
└─Project.EntityFrameworkCore
   ...

2. Package by Component: Feasible and Powerful for Complex Domains #

While less common in basic ABP projects, package-by-component is absolutely supported and is a great fit for certain scenarios:

• ABP's Modularity Supports It: ABP's core modular system is designed to let you split your application into independent, reusable modules. Organizing by component (each boundary context as its own module with its own layers) aligns perfectly with this philosophy. You can even deploy these modules independently if needed.
• Ideal for Large/Complex Projects: When your domain has distinct, loosely coupled boundary contexts (like orders, products, customers) that need to be developed, tested, or maintained independently, package-by-component shines. Each component's code is self-contained, making it easier for teams to work in parallel and reduce cross-domain coupling.

Your proposed package-by-component structure is totally valid in ABP:

Project.sln
├─hosts
│  └─Project.Host
└─modules
   ├─orders
   │  ├─Order.Application
   │  ├─Order.Core
   │  └─Order.EntityFrameworkCore
   ├─products
   │  ├─Product.Application
   │  ├─Product.Core
   │  └─Product.EntityFrameworkCore
   └─customers
      ├─Customer.Application
      ├─Customer.Core
      └─Customer.EntityFrameworkCore

3. Which Should You Choose? #

• Go with package-by-layer if: You're starting a new project, your team is new to ABP, or your domain isn't highly complex. It's the safest bet for onboarding and leveraging community resources.
• Go with package-by-component if: You're working on a large-scale project with clear, independent boundary contexts, or your team has experience with DDD and modular architecture. ABP will handle this structure smoothly, and you'll benefit from better separation of concerns as your project grows.

内容的提问来源于stack exchange，提问作者SAssassin