Resembling a graceful rendition of Tchaikovsky’s infamous ballet, the namesake Swan Lake release of the Ballerina (referred to as Ballerinalang in the article) programming language comes packed with a revamped gRPC library to provide a more elegant way of handling client and bi-directional streaming cases. This article aims to discuss this improved gRPC streaming functionality by referring to an example for better understanding. However, if you are new to gRPC in Ballerinalang and seeking in-detail knowledge on the basics and implementation of a Unary application, read this blog on Ballerina + gRPC.
Microservices Bill Calculator with Ballerinalang
Let’s look at a basic microservices-based bill calculator as an example. The client would stream the price and quantity (the input values) of various items to be included in the total bill, and the server would essentially multiply and add them together to return the total bill as a reply.