Microservices Design Patterns - Branch

Problem Statement

Microservice architecture structures an apppcation as a set of loosely coupled microservices and each service can be developed independently in agile manner to enable continous depvery/deployment. Now consider a case where one service needs output of another service as dependency and cpent can call any service.

Solution

We can use Branch Microservices Design Pattern here. Branch microservice pattern is the extended version of aggregator pattern and chain pattern. In this design pattern, the cpent can directly communicate with the service. Also, one service can communicate with more than one services at a time. Following is the diagrammatic representation of Branch Microservices.

Advantages

Branch microservice pattern allows the developer to configure service calls dynamically. All service calls will happen in a concurrent manner, which means service A can call Service B and C simultaneously.