java - Refreshing Dagger 2 instance from Android Application class

Question

I have a set of @Singleton and @Provides method in my module class for the purpose of creating Singleton instance throughout the application. Everything works fine except few bottle neck scenarios like as follows:

STEP 1. I am creating a Retrofit instance from OKHttpClient with Auth token in it to make a authenticated api calls each time (Auth token retrieval and insertion is handled through SharedPreferences). But the problem starts at the time of relaunching the activity after when i logout the application by clearing databases and shared preferences values.

STEP 2. After logout, am making an another request to fetch auth tokens and inserting into SharedPreferences again for future use.

STEP 3: Now if i proceed with the rest of api calls, the previous instance of the Dagger @Singleton and @Provides method remains same unless and until if i relaunch the app by clearing it from the recent task. (New auth token is not updated)

Fixes Needed:

1. How to trigger the Dagger provider methods forcibly to trigger or revoke it again?

2. Is there any method to refresh the application class data as similar behaviour like when the app relaunches.?

Please find my Dagger 2 architecture used in my project:

NetworkModule.java (Dagger Module class)

@Module
public class NetworkModule {

  private Context context;


    public NetworkModule(Application app) {
        this.context = app;
    }


    @Provides
    @Named("network.context")
    Context providesContext() {
        return context;
    }

 @Singleton
    @Provides
    OkHttpClient providesOkHttpClient(@Named("network.context")final Context context) {


        final UserProfile userProfile = GsonUtils.createPojo(SharedPrefsUtils.getString(Constants.SHARED_PREFS.USERS_PROFILE, "",context), UserProfile.class);


        Logger.i(userProfile != null && !TextUtils.isEmpty(userProfile.getAuth_token()) ? userProfile.getAuth_token() : "----OAuth token empty---");

        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
        httpClient.addInterceptor(new Interceptor() {
            @Override
            public Response intercept(Interceptor.Chain chain) throws IOException {
                Request original = chain.request();

                Request request = original.newBuilder()
                        .header("Accept", "application/json")
                        .header("Content-Type", "application/json")
                        .header("Api-Version", "application/vnd.addo-v1+json")
                        .header("Access-Token", userProfile != null && !TextUtils.isEmpty(userProfile.getAuth_token()) ? userProfile.getAuth_token() : "")
                        .header("App-Version", Utils.getVersionName(context))
                        .header("Device-Platform","android")
                        .method(original.method(), original.body())
                        .build();

                return chain.proceed(request);
            }

        });

        return httpClient.build();
    }



    @Provides
    @Named(Constants.INJECTION.BASE_URL)
    String providebaseURL() {
        return Constants.URL.BASE_URL;
    }

    @Singleton
    @Provides

    Retrofit providesRetrofit(@Named("network.context")Context context, @Named(Constants.INJECTION.BASE_URL) String baseURL, OkHttpClient okHttpClient) {

        Retrofit retrofit = new Retrofit.Builder()
                .baseUrl(baseURL)
                .addConverterFactory(GsonConverterFactory.create())
                .addCallAdapterFactory(RxJavaCallAdapterFactory.create())
                .client(okHttpClient)
                .build();
        return retrofit;
    }


@Singleton
    @Provides
     NetworkApiService providesNetworkApiService(Retrofit retrofit){
        return retrofit.create(NetworkApiService.class);
    }


 @Singleton
    @Provides
    ProjectPresenter providesProjectPresenter(NetworkApiService networkApiService){
        return new ProjectPresenterImpl(networkApiService);
    }




}

AppComponent.java (Dagger component class)

@Singleton
@Component(modules =  {NetworkModule.class})
public interface AppComponent {


    //ACtivity
    void inject(AuthenticationActivity authenticationActivity);


    void inject(MainActivity mainActivity);


    //Fragments

    void inject(ProjectsListFragment projectsListFragment);



}

Application.java (Class used to create Dagger component)

   public class Application extends Application {

        private AppComponent appComponent ;


        @Override
        public void onCreate() {
            super.onCreate();

            Realm.init(this);

            ButterKnife.setDebug(BuildConfig.DEBUG);


            appComponent = DaggerAppComponent.builder().appModule(new AppModule(this)).networkModule(new NetworkModule(this)).build();

        }


        public AppComponent getAppComponent() {
            return appComponent;
        }

    }

Kindly help me with your suggestions or tips to resolve this weird behaviour of Dagger 2. Any kind of solutions will be much helpful to me since I am completely stuck up with this for the past 6 days. I am clueless and perplexed because my complete architecture is built on top of this. Please forgive me for typos and corrections. Ping me if there are any clarifications required regarding the same. Thanks in advance.

Answer 1

How to trigger the Dagger provider methods forcibly to trigger or revoke it again?

Is there any method to refresh the application class data as similar behaviour like when the app relaunches?

Nope, there isn't such a trigger. Component is responsible for providing you a dependency. If you are done with one Component and you want to invalidate it (i.e. your dependencies to be created again) you have to dispose from it (null out) and create a new Component. Now all your dependencies will be created again.