An Approach to Clean Architecture for Microservices Using Python

Microservices architecture (MSA) is a popular approach to create maintainable and independent units of large systems. Recently many works have been carried out in migrating monolithic systems into MSA as well as using it in upcoming areas of development like Internet of Things(IoT). Most of the existing work emphasizes MSA for the system, little attention is paid to the architecture followed in the implementation of the underlying services. Clean architecture (CA) is a type of Domain Driven Design (DDD) approach that separates business logic so that it can be tested independently. Clean architecture is often used in Android systems. Introducing clean architecture in MSA can further ensure Separation of Concerns (SoC) and testability of business logic in the system. Through this paper an optimal solution to clean architecture in microservices is proposed. The system under consideration is a financial system that uses microservices based on Python and GraphQL.