The single responsibility principle is the most significant rule in the software world. Throughout all phases of software development, this rule applies. SRP defines a module that is more related to business responsibility. As well as evaluating what a code does, it also examines why it does so rather than what it should. Now let me tell you, how does SRP work?
Single Responsibility Principle (SRP)
The single responsibility principle focuses on doing one thing at a time. The module can take only one responsibility and change it. This principle is related to the team’s responsibility for the module, not what the code is inside the module. However, if the operations are strongly built on a single business feature, they can perform more than one task. That means users can serve multiple functions if it uses only one part of the domain.
If a user wishes to transfer a code, it can use only ingoing transfer, outgoing, or international transfers. Now let’s learn about SRP at the system level:
SRP and Monoliths
Users can design monoliths using three approaches:
Modular monolith: Each module is responsible for the business function and is ready to change into microservices.
Distributed monolith: Here, modules badly fail to implement microservices.
Traditional monolith: Instead of splitting, modules are directly deployed into a single machine with no distribution system.
These three types of approaches have a different relationship with the SRP.
SRP and Service-Oriented Architecture
Users can quickly notice the influence of SRP in Service-Oriented Architecture. Here services are responsible for an individual part of the domain. Thus members not related to the domain cannot take responsibility.
SRP and Event-Driven Architecture
In an event-driven architecture, modules are loosely coupled with no direct dependencies. One advantage of this system is the service does not require any service changes, and it just needs to update in time.
SRP has a positive impact on a Software system. To build a high-quality software or application with high coupling modules, businesses must implement the Single Repository Principle.