https://spring.io/projects/spring-modulith
Demo: https://github.com/sw-tracker/spring-modulith-demo
Spring Modulith is a new package by VMware that aims to help/guide you to build domain structured applications.
Typical Spring Boot applications follow a technical structure.
Technical arrangement, functional decomposition approach: layering, or ports and adapters, etc.
This is a problem!
It would be nice if the framework provided support for domain based structuring.
- Repo overview
- Architectural Observability
- Verifying Application Module Structure
- Integration Testing Application Modules
Being able to get a high-level understanding of the logical, functional parts of an application and how they interact with each other.
- ArchUnit style tests (under the hood), with more extensive defaults
- Tests:
ApplicationModules.of(Application.class).verify();- No cycles on the application module level
- Efferent module access via API packages only: Only public classes/etc. in the top level folder can be used by other domains
- Explicitly allowed application module dependencies only (optional - via
package-info.java)
@ApplicationModule(allowedDependencies = …)
Spring Modulith allows to run integration tests bootstrapping individual application modules in isolation or combination with others.
These are slice tests, similarly to @DataJpaTest or @WebMvcTest.
Except these are vertical slices rather than horizontal slices.
package example.order;
@ApplicationModuleTest
class OrderIntegrationTests {
// Individual test cases go here
}15:44:46.477 - main : Re-configuring auto-configuration and entity scan packages to: example.order.