Best practice to pass dynamic parameters to an UseCase?

Author: rockerhieuCreated Jul 5, 2015Updated Nov 28, 2020

Labelsquestiondiscussion

As in the example, usecase's parameters are set via UserModule:

java

@Module
public class UserModule {
  private int userId = -1;
  public UserModule() {}

  public UserModule(int userId) {
    this.userId = userId;
  }

  @Provides @PerActivity @Named("userDetails") UseCase provideGetUserDetailsUseCase(
      UserRepository userRepository, ThreadExecutor threadExecutor,
      PostExecutionThread postExecutionThread) {
    return new GetUserDetailsUseCase(userId, userRepository, threadExecutor, postExecutionThread);
  }
}

But there are some cases when buildUseCaseObservable depends on some dynamic parameters. I tried to create an interface to provide these parameters and let the view (in MVP) implement it and pass them to UserModule. With this approach if the view is a Fragment then I have to re-create UserModule again in the Fragment.

java

public interface UserIdProvider {
  int getUserId();
}

Any suggestion, recommendation?

Source: android10/Android-CleanArchitecture

View original on GitHub View discussion on GitHub