Book Image

Introduction to JVM Languages

Book Image

Introduction to JVM Languages

Overview of this book

Anyone who knows software development knows about the Java Virtual Machine. The Java Virtual Machine is responsible for interpreting Java byte code and translating it into actions. In the beginning, Java was the only programming language used for the JVM. But increasing complexity of the language and the remarkable performance of the JVM created an opening for a new generation of programming languages. If you want to build a strong foundation with the Java Virtual Machine and get started with popular modern programming languages, then this book is for you. The book will begin with a general introduction of the JVM and its features, which are common to the JVM languages, helping you get abreast with its concepts. It will then dive into explaining languages such as Java, Scala, Clojure, Kotlin, and Groovy and will show how to work with each language, their features, use cases, and pros and cons. By writing example projects in those languages and focusing on each language’s strong points, it will help you find the programming language that is most appropriate for your particular needs. By the end of the book, you will have written multiple programs that run on the Java Virtual Machine and know about the differences between the various languages.
Table of Contents (15 chapters)

The Luminus web framework


Luminus is a microframework for quickly building powerful web applications in Clojure. It is fully configurable and has strong built-in database support, both for traditional SQL and NoSQL databases. Getting started is easy, especially if you use one of the built-in Leiningen templates. It is strongly recommended that you consult the documentation while playing around with Luminus. You can find this at http://www.luminusweb.net.

In the following sections, we will be creating a new project based on the myapp template and then run and explore it.

Creating a Luminus project

As we have seen, Counterclockwise can generate projects based on Leiningen templates. There's an issue when creating projects, though. Counterclockwise uses its built-in Leiningen version that can be older than the latest version. At the time of writing this book, Counterclockwise throws exceptions while generating a project based on the luminus myapp template. This problem can be solved by creating...