Creating a WebSocket Server with the Spark Framework

This tutorial provides three different ways to create a WebSocket server in Java using Spring Boot, Spark Framework, and the Java API for WebSockets. To start, you need a Vonage API account and set up your project with Gradle and the Spark framework. You then create a WebSocket handler that can handle both text and binary messages, which is used to echo back messages received from clients. The handler is registered in the `App` class, and a client is created using JavaScript to test the server. The client sends both text and binary messages, which are echoed back by the server. The tutorial concludes with a summary of the finished code and an invitation to learn about creating WebSocket servers with Spring Boot or the Java API for WebSockets.

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