Configuración de Múltiples Proveedores de Repositorio en BLoC

Vendor and repository architecture is critical to building scalable and maintainable applications. By implementing a system that allows us to manage multiple data sources and states, we can create more robust and flexible applications. In this article, we will explore how to configure multiple providers and repositories to handle both authentication and transactions in our application.

How to implement a MultiBlockProvider to manage different states?

When developing complex applications, it is common to need to handle different states and data sources simultaneously. Instead of having a single provider handling all the information, we can implement a more modular and organized system.

To start, we need to modify our current configuration from a single provider to a system that can handle multiple providers:

// We change from BlockProvider to MultiBlockProviderMultiBlockProvider MultiBlockProvider( providers: [ // First provider for authentication BlocProvider( create: (context) => OutBloc( repository: RepositoryProvider.of<OutRepository>(context), ), ),), // Second provider for transactions BlocProvider( create: (context) => IncomeExpenseBloc( repository: RepositoryProvider.of<IncomeExpenseRepository>(context), ).add(TransactionsEvent()), ), ), ], child: // Here goes the main widget of the application)

With this structure, we are creating a MultiBlockProvider that contains a list of providers. Each provider handles a specific functionality:

1. The first provider handles authentication(OutBloc).
2. The second provider handles transactions(IncomeExpenseBloc).

This separation of responsibilities allows each block to focus on its specific task, making the code more maintainable and easier to understand.

Why is it important to separate providers by functionality?

By separating providers by functionality, we achieve:

• Greater modularity: Each provider is responsible for a specific task.
• Better testability: It is easier to test isolated components.
• Simplified maintenance: Changes in one functionality do not affect others.

How to configure multiple repositories for different data sources?

Similar to vendors, we also need to configure multiple repositories to handle different data sources. For this, we will use a MultiRepositoryProvider:

MultiRepositoryProvider( providers: [ // Repository for authentication RepositoryProvider<OutRepository>( create: (context) => OutRepository(), ), // Repository for transactions RepositoryProvider<IncomeExpenseRepository>( create: (context) => IncomeExpenseRepository(), ), ), ], child: // Here goes the MultiBlockProvider)

In this configuration, we are creating two different repositories:

1. OutRepository to handle authentication.
2. IncomeExpenseRepository to handle transactions.

Each repository is responsible for interacting with its own data source, which allows a clear separation of responsibilities and makes the code more organized.

What are the advantages of using multiple repositories?

Using multiple repositories provides us with several advantages:

• Separation of concerns: Each repository takes care of a specific data source.
• Greater flexibility: We can change the implementation of one repository without affecting others.
• Better code organization: The code related to each data source is grouped together.

How to integrate everything into a coherent architecture?

Once we have configured both providers and repositories, we need to integrate them into a coherent architecture. The general structure would be:

MultiRepositoryProvider( providers: [ // Repositories... ], child: MultiBlockProvider( providers: [ // Providers... ], child: // Main application ),).

In this structure, the MultiRepositoryProvider wraps the MultiBlockProvider, allowing providers to access repositories. This layered architecture follows the repository design pattern, where:

1. Repositories handle data access.
2. The providers (or blocks) handle the business logic
3. The user interface consumes the data from the providers.

This clear separation of responsibilities makes the application easier to maintain and scale as it grows in complexity.

Implementing multiple vendors and repositories is a powerful technique for building robust and maintainable applications. By clearly separating responsibilities, we can create code that is more organized and easier to understand. Have you implemented this architecture in your projects? Share your experience in the comments.