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

Asynchronous communication

In asynchronous communication, the caller does not wait for a response from the backend server. Instead, it sends the request to the backend server and continues to execute the program. In some cases, we cater an acknowledgement (ACK) to indicate that the message was delivered. The backend server handles those requests asynchronously and performs a task. Having a series of synchronous calls for microservices is usually not a good practice since if one of the services breaks, the entire series of transactions will fail and need to be rolled back. Usually, services in a microservice architecture should be stateless, responsive, and small in size as much as possible. Asynchronous communication methods help you to create stateless applications that are reliable and fast. In this section, we will discuss different types of asynchronous communication protocols and how the Ballerina language supports these.

Asynchronous communication over microservices

When...