Cedric Champeau

Presentations

Embedding Groovy in your Java applications

The Groovy language has always been promoted as an excellent companion to the Java language, but also as a lightweight platform for building DSLs on the JVM. In practice, Groovy offers a wide range of options to integrate with Java: plain application then use it as a jar dependency, cross-compilation, GroovyScriptEngine, GroovyShell, ... Furthermore, each of those solutions have benefits or disavantages that you might not be aware of.

In this talk, we will discuss those options, show examples of integration and demonstrate how you can leverage the rich configuration options of Groovy to make the experience very smooth. If you ever dreamt of sneaky throwing Groovy into your heavyweight application, you may end up with new ideas to do so!

Type checking your DSLs

Since Groovy 2.0, the Groovy language offers the ability to type check your code at compile time. Type checking is a nice feature for people who come from a strongly typed language world and do not feel comfortable with dynamic typing. On the other hand, Groovy is also a perfect match when it comes to writing DSLs. It becomes even more interesting if you know that you can combine strategies in order to provide the user with a statically checked DSLs.

In this session, we will introduce the type checking mechanism of Groovy and demonstrate some techniques that you can use to make your DSL compatible with the type checker.