Business logic has evolved dramatically, moving from monolithic structures through microservices to functions. Monolithic structures, once the dominant model, are single-tiered applications where all components are interconnected and interdependent. While this model simplifies development and testing, it lacks flexibility and scalability.
Microservices emerged as a solution to these shortcomings. They consist of small, independent processes that communicate with each other using language-agnostic APIs. These services are built around business capabilities and independently deployable by fully automated machinery. Microservices offer improved fault isolation, eliminate long-term commitment to a single technology stack, and enable an organisation to scale and evolve its technology stack more rapidly.
The latest evolution in business logic is the serverless architecture or Functions as a Service (FaaS). This model further breaks down the application into single-purpose, stateless functions that respond to events and deliver results. These functions, running in the cloud, only consume resources when active. They offer an even higher degree of scalability and cost-effectiveness, as businesses pay only for the resources they use.
In summary, the evolution of business logic from monoliths through microservices to functions has been driven by the need for increased flexibility, scalability, and cost-effectiveness.
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