java - 是否可以让 ObjectProvider 提供来自其他包的对象？

Question

初始情况

我目前正在使用 Spring 库 PipelinR 构建 API ，其灵感来自著名的 NuGet 包 MediatR 。我在此应用程序中创建了多个包来隔离 java 类。 API 的入口点位于 com.example.project.WebApi 包中。管道的配置文件也位于此处。

@Configuration
public class PipelinrConfiguration {

    @Bean
    Pipeline pipeline(ObjectProvider<Command.Handler> commandHandlers, ObjectProvider<Notification.Handler> notificationHandlers, ObjectProvider<Command.Middleware> middlewares) {
        return new Pipelinr()
          .with(commandHandlers::stream)
          .with(notificationHandlers::stream)
          .with(middlewares::orderedStream);
    }
    
}

无论如何，所有命令和命令处理程序都位于不同的包中，例如com.example.project.ApplicationService.CreateSomethingCommand。

com.example.project.ApplicationService.CreateSomething/
    CreateSomethingCommand.java
    CreateSomethingCommandHandler.java

有谁知道我如何在我的 PipelinrConfiguration.java 文件中提供这些类，以便 ObjectProvider 能够找到这些类。

我非常感谢任何形式的帮助，干杯!

---

编辑:#001

是的，bean 是用 @Component 注释的。

CreateSomethingCommand.java

public class CreateSomethingCommand implements Command<Voidy> {

    public String host;
    
    public CreateSomethingCommand() {
        
    }
    
    public CreateSomethingCommand(String host) {
        this();
        this.host = host;
    }
    
}

CreateSomethingCommandHandler.java

@Component
public class CreateSomethingCommandHandler implements Command.Handler<CreateSomethingCommand, Voidy> {

    @Override
    public Voidy handle(CreateSomethingCommand command) {
        
        System.out.println("Command recieved by " + command.host);
        
        return null;
    }

}

Answer 1

@Configuration
@ComponentScan(basePackages = {"package1”, "package2"})
public class PipelinrConfiguration {
    // attention here you have to declare three different beans of type ObjectProvider otherwise it will inject by type
    @Bean
    Pipeline pipeline(@Qualifier(“bean1”) ObjectProvider<Command.Handler> commandHandlers, @Qualifier(“bean2”)  ObjectProvider<Notification.Handler> notificationHandlers, @Qualifier(“bean3”) ObjectProvider<Command.Middleware> middlewares) {
        return new Pipelinr()
          .with(commandHandlers::stream)
          .with(notificationHandlers::stream)
          .with(middlewares::orderedStream);
    }
    
}