Jakarta Web Services

Course details

Get started quickly with Jakarta Web Services. In this course, Java engineer, author, and instructor Buddhini Samarakkody gives an overview to Web Services and Web Services specific to Jakarta EE. Buddhini goes over how to set up the environment to get started building a simple RESTful API and shows you how to build and run a REST API for performing CRUD functions in an application. She covers how to finetune some of those Jakarta RESTful web services by performing validations, as well as how to handle exceptions and secure them. Buddhini also discusses and demonstrates the possibility of running RESTful applications in a Java SE environment.

Concepts

Introduction

Jakarta Web Services - Integrating applications over the internet
What you should know

Web Services - What and Why

What is a web service
Why are web services needed
APIs, web services, and endpoints

Web Services in Jakarta EE

REST and SOAP
XML SOAP-based vs. RESTful web services
RESTful and XML SOAP-based web service use cases
History of web services - From Java EE to Jakarta EE
What's new in Jakarta EE for web services
The cloud-native focus in Jakarta web services

Set the Stage to Build a REST API

CRUD and HTTP methods
Create and configure a basic web application
Configure Jakarta RESTful Web Services
Add a Resource class

Build the REST API for the Read Action

Implement resource method for reading - HTTP GET
Use path parameters
Use query parameters
Explore response value types - Media types
Media types in action
ResponseBuilder and methods
Control the response via ResponseBuilder
Challenge - Travel app
Solution - Travel app

Build the REST API for Create, Update, and Delete Actions

Use HTTP POST for the CREATE action
Use HTTP PUT for the UPDATE action
Use HTTP DELETE for the DELETE action
Challenge - Travel app
Solution - Travel app

Fine-Tune Your Jakarta RESTful Web Services

Validate your REST endpoints
Perform single field validations in REST
Perform custom validations in REST
Handle exceptions in REST endpoints
Implement security in REST endpoints

RESTful Applications in the Java SE Environment

The Java SE bootstrap API
Create and configure the Java SE app
Build the RESTful application
Run the application and test the endpoint

Conclusion

Next steps