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

Accessing data with Ballerina

Database access is a common requirement for almost all applications. Applications that need to maintain a state need to persist its status somewhere on the system. This status could be a permanent state or a temporary state. Databases are used for both permanent and in-memory data storage purposes since they provide a range of functionalities to read and write data. If data is to be permanent, we should keep data on permanent storage. If the data does not need to be permanently stored, this data can be persisted in an in-memory database.

Connecting the Ballerina application with MySQL

Data is a vital part of any software system. The database is the key component, which is used to store and query data. Programming languages have their own interfaces that can be used to communicate with databases. In short, these interactions can be divided into four parts known as CRUD operations. CRUD operations consist of the following:

  • Create: Insert data...