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

Fronting Ballerina services with an API gateway

Integrating services in a microservices application is essential as there are services that need to be connected. When client services are required to access a backend service, then the request should be routed to the target service. An API gateway is a component that is used to decouple internal services from external services. In this section, we will discuss building an API gateway with Ballerina and how to use the existing API gateway to handle requests.

Building an API gateway with Ballerina

An API gateway contains an API that exposes external services and applications to interact with. The API gateway provides a single entry point for client applications to connect with the backend application. The API gateway plays a major role in microservice architecture as it provides the following features:

  • Routing requests: The API gateway endpoint needs to route requests to the corresponding services that can handle a particular...