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Jfokus - Rocket Propelled Java
Andres Almiray gave a presentation about Project Lombok and Groovy AST transformations. Project Lombok is a Java library that reduces boilerplate code through annotations processed at compile time. It includes annotations like @Getter and @Setter that generate getter and setter methods. Lombok-pg extends Lombok with additional annotations. Groovy AST transformations also allow modifying code at compile time through annotations, and integrate well with Java. Both approaches allow generating code automatically through annotations processed during compilation.
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Jfokus - Rocket Propelled Java
- 1. ROCKET PROPELLED JAVA ANDRES ALMIRAY CANOO ENGINEERINGA.G. @AALMIRAY
- 2. ABOUT THE SPEAKER Javadeveloper since the beginning True believer in open source Groovy committer since 2007 Project lead of the Griffon framework Currently working for
- 3. PROJECT LOMBOK Where,Who, How? Why? ■ http://projectlombok.org/ ■ Get rid of boiler plate code ■ Reinier Zwitserloot ■ Compiler does the heavy @surial lifting ■ Roel Spilker @rspilker ■ Developers just have to write the essentials ■ Relies on JDK6’s Annotation Processor ■ Modifies Bytecode at compile time 3
- 4. HOW DOES ITLOOK? 4
- 5. ANNOTATIONS ■ @Getter/ @Setter ■ @Cleanup ■ @ToString ■ @Synchronized ■ @EqualsAndHashCode ■ @SneakyThrows ■ @Log ■ @NoArgsConstructor ■ @Delegate ■ @AllArgsConstructor ■ @Data ■ @RequiredArgsConstruct or 5
- 6. LOMBOK-PG Where, Who,How Why? ■ https://github.com/ ■ Extends Lombok with peichhorn/lombok-pg/ additional annotations such ■ Philipp Eichhorn as: ■ peichhorn @ github ■ @Singleton ■ @FluentSetter ■ Delivers its own common ■ @Builder AST API ■ and more! ■ Easier to write cross compiler AST 6
- 7. GROOVY AST TRANSFORMATIONS Where, Who, How Why? ■ https:// ■ Groovy plays nicely with groovy.codehaus.org Java ■ The Groovy Team ■ Compile time metaprogramming executes faster than ■ Compile time runtime metaprogramming ■ Changes visible to other ■ Changes registered in the JVM languages bytecode 7
- 8. HOW DOES ITLOOK? The @Immutable AST transformation makes writing immutable classes trivial
- 9. SOME ANNOTATIONS ■ @Bindable / @Vetoable ■ @Delegate ■ @Grab ■ @Log ■ @Immutable ■ @Synchronized ■ @AutoClone ■ @Singleton ■ @AutoExternalize ■ @ToString ■ @EqualsAndHashCode ■ @TypeChecked ■ @TupleConstructor ■ @CompileStatic ■ @Canonical ■ Plus many more! 9
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