Book Image

Cloud Native Applications with Ballerina

By : Dhanushka Madushan
Book Image

Cloud Native Applications with Ballerina

By: Dhanushka Madushan

Overview of this book

The Ballerina programming language was created by WSO2 for the modern needs of developers where cloud native development techniques have become ubiquitous. Ballerina simplifies how programmers develop and deploy cloud native distributed apps and microservices. Cloud Native Applications with Ballerina will guide you through Ballerina essentials, including variables, types, functions, flow control, security, and more. You'll explore networking as an in-built feature in Ballerina, which makes it a first-class language for distributed computing. With this app development book, you'll learn about different networking protocols as well as different architectural patterns that you can use to implement services on the cloud. As you advance, you'll explore multiple design patterns used in microservice architecture and use serverless in Amazon Web Services (AWS) and Microsoft Azure platforms. You will also get to grips with Docker, Kubernetes, and serverless platforms to simplify maintenance and the deployment process. Later, you'll focus on the Ballerina testing framework along with deployment tools and monitoring tools to build fully automated observable cloud applications. By the end of this book, you will have learned how to apply the Ballerina language for building scalable, resilient, secured, and easy-to-maintain cloud native Ballerina projects and applications.
Table of Contents (15 chapters)
1
Section 1: The Basics
4
Section 2: Building Microservices with Ballerina
8
Section 3: Moving on with Cloud Native

Using types to build applications with Ballerina

As you have already learned, Ballerina has a diverse type system that you can use to represent complex data structures and behaviors. To build a functioning application, you need to use these types. In this section, we will focus on handling program flow by using conditions and loops, using object concepts to build an object-oriented system, error handling to handle errors.

Controlling program flow

Although types provide a way to use data in the Ballerina programming language, program flow controllers provide syntax to handle the data flow in an application. Ballerina flow control is inspired by the best of other programming languages. Ballerina contains program flow controllers such as if else, while, foreach, and match. The syntaxes of these are similar to those in programming languages such as Java, C, and Go.

if else

The if else syntax is pretty much the same as it is in other programming languages that let programs make...