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

Managing transactions in Ballerina

It is a common requirement for applications to access databases concurrently. In this case, you need to focus seriously on the transaction management of the system to ensure that the system does not end up in inconsistent states. We will discuss more about transaction management systems with reference to the order verification use case in the order management system.

Building an order management system

To implement the order management system, first, we need to define the table structure that holds the data. The following diagram contains all the tables that we need to implement the order verification scenario.

Figure 5.1 – Order management system database structure

The supplier is the entity that adds products to the system. The list of suppliers is saved in the Suppliers table. A supplier can have a supplier name and a supplier ID to uniquely identify it. Each supplier can have multiple inventories. Each inventory...