Dependency injection

Vona injects Bean instances through @Use decorator function

Injection methods

1. Module Injection: Can be directly injected based on Class type
2. Cross-Module Injection: Can be injected based on Bean identifier, which helps achieve loose coupling between modules and supports circular references

Based on Class type

Inject the ServiceStudent provided by the module demo-student in the current module. The code is as follows:

import { ServiceStudent } from '../service/student.ts';

export class ControllerStudent {
  @Use()
  student: ServiceStudent;
}

Based on Bean identifier

Inject the ServiceStudent provided by the module demo-student into other modules, as shown in the code below:

import type { ServiceStudent } from 'vona-module-demo-student';

export class ControllerStudent {
  @Use('demo-student.service.student')
  student: ServiceStudent;
}

Since the imported ServiceStudent is of type, the Bean identifier of the Service needs to be specified