Applications Adapters

Applications Adapters is a project of Macha Applications. It is the layer of customization, adaptation, and connection. It focuses on tailoring the shared Core modules for specific applications by introducing custom primary and secondary adapters. These adapters bridge your reusable Core components to the unique needs, environments, and infrastructure of the MachaOn deployment.

Simply put, Applications Adapters take the independence of Core logic and make it practical, deployable, and usable in the messy, detail-filled world of real applications.

Project structure

Project Structure

Primary and Secondary Adapters

An Application Adapter serves as an intermediary, ensuring Core components remain clean and reusable while catering to the specific behavior required by the application. This is achieved through two types of adapters:

Primary Adapters

Customizations that translate Core logic into the application’s primary workflows.
Primary adapters focus on the external interactions—such as connecting Core components to APIs, external services, or application-specific entry points. For example:

  • A primary adapter might convert a Core component’s Order entity into a request payload for an external payment gateway.
  • Or, it might define the way use case boundaries interact with application-wide event systems.

Secondary Adapters

Customizations for infrastructure-specific concerns.
These allow Core components to seamlessly integrate with databases, message queues, logging systems, or other secondary infrastructure requirements. For example:

  • A secondary adapter might configure how Core persistence logic interacts with an SQL database (e.g., adapting generic operations to custom table schemas).
  • Or, it might align the way application metrics are collected based on specific infrastructure tooling.

Together, these adapters collectively transform the Core modules into ready-to-use bricks for specific applications, without violating their independence.

The Principles Behind Applications Adapters

An Application Adapter achieves customization while respecting the boundaries described in Clean Architecture:

  1. Independence of Core Business Logic
    The Core remains untouched, allowing it to retain its reusability, scalability, and modular independence.
    Adapters handle all application-specific needs, insulating the Core from the details.

  2. Controlled Customization
    Adapters provide just enough customization to enable specific use cases. They ensure Core components can flexibly adapt to diverse application requirements without introducing unnecessary complexity.

  3. Layer of Isolation
    Applications Adapters act as a protective barrier between the pure Core logic and the complexities of external details, whether application workflows or infrastructure concerns.

Why Applications Adapters Matter

Every application is unique. Each has its own rules, workflows, tools, and infrastructure. Designing directly for every possible use case would break the Core’s modularity—and violate the principles of reusability. Applications Adapters solve this problem by customizing Core modules outside of the Core, enabling scalable and maintainable systems.

By doing so, they ensure that:

  • Core modules stay reusable, tested, and clean.
  • Applications are tailored for their specific requirements, with versioned and maintainable components.
  • Developers can focus on adapting functionality rather than modifying shared logic.

This structure keeps your system modular and prevents the creation of tightly coupled monoliths.

The Role in Macha Applications

The Macha Applications project builds on Applications Adapters to form a bridge between Core logic and MachaOn deployment.

Applications Adapters ensure:

  • Core modules are customized, adapted, and ready for deployment.
  • Infrastructure integration is handled cleanly without polluting the Core components.
  • Application-specific workflows are implemented seamlessly using primary and secondary adapters.

By isolating customization in Applications Adapters, Machanism ensures clean separation of concerns while enabling robust flexibility for application deployment.

In Summary

Adapters link boundaries, but they do so with purpose. The Applications Adapters project takes the shared, reusable brilliance of Core Projects and adapts it for application-specific implementations. Whether it’s primary adapters focusing on workflows or secondary adapters addressing infrastructure, they deliver the customization you need without compromising the architecture’s mission.

By combining these adapters with Macha Applications and MachaOn deployment, you create solutions that are:

  • Modular: Fully reusable and maintainable.
  • Customizable: Ready for any specific project need.
  • Scalable: Adapted for long-term growth and flexibility.

This is the Applications Adapters project—customization meets architecture.