Aggregator Pattern
The Aggregator Pattern provides a way for a client to obtain combinations of data from each microservice of a microservice-based application. However it is not exactly the same as an API Gateway.
API Gateway Pattern
The API Gateway Pattern provides a way for a client to obtain combinations of data from each microservice of a microservice-based application.
Factory Method Pattern
The Factory Method pattern is extremely useful when a class cannot decide in advance the class of objects it must create. The task of specifying the objects is given to the subclasses, instead. The class delegates responsibility to one of several helper subclasses, and the user localizes the knowledge of the delegate. Factory Method Pattern