MSA Decomposition Pattern: Decompose by business capability

Pattern: Decompose by business capability

Problem

Microservices is all about making services loosely coupled, applying the single responsibility principle. However, breaking an application into smaller pieces has to be done logically. How do we decompose an application into small services?

Solution

One strategy is to decompose by business capability. A business capability is something that a business does in order to generate value. The set of capabilities for a given business depend on the type of business. For example, the capabilities of an insurance company typically include sales, marketing, underwriting, claims processing, billing, compliance, etc. Each business capability can be thought of as a service, except it’s business-oriented rather than technical.

 e.g.

• Order Management is responsible for orders.
• Customer Management is responsible for customers.