The document provides an overview of the Grails framework, which integrates Groovy, Spring, and Hibernate to create web applications using the Model-View-Controller (MVC) architecture. It covers Groovy's features, Grails' plugin architecture, application structure, and examples of controllers and domain models. Additionally, it highlights command-line tools and custom configurations for database connections and other settings in Grails development.

1. Miguel PingIntroduction to Grails Framework18/03/2010

2. Small Introduction on Groovy

3. Grails

4. Grails = Groovy on (G)Rails

5. Grails is MVC

6. Powered by Spring and Hibernate

7. Model/Domain Layer

8. View Layer

9. Controllers

10. DemoAgenda

11. Groovy+=

12. Java ClasspublicclassHelloWorld {privateString name;publicvoidsetName(String name) {this.name = name; }publicStringgetName() {return name; }publicStringgreet() {return"Hello "+ name; }publicstaticvoidmain(String[] args) {HelloWorldhelloWorld=newHelloWorld();helloWorld.setName("Groovy");System.out.println(helloWorld.greet()); }}

13. Groovy ClasspublicclassHelloWorld {privateString name;publicvoidsetName(String name) {this.name = name; }publicStringgetName() {return name; }publicStringgreet() {return"Hello "+ name; }publicstaticvoidmain(String[] args) {HelloWorldhelloWorld=newHelloWorld();helloWorld.setName("Groovy");System.out.println(helloWorld.greet()); }}

14. Multiple classes per file, or even no classes at all (scripts)

15. Public unless defined otherwise

16. Getters and Setters by default

17. String interpolation

18. Semicolons are optional

19. Type declarations are optional

20. Return keyword is optionalGroovy Featuresclass HelloWorld {def namedefgreet() { "Hello ${name}" }}helloWorld =newHelloWorld(name: "Groovy")println helloWorld.greet()

21. Dynamic language (everything happens at runtime)

22. Dynamically typed (types are “optional”)

23. Closures

24. Anonymous Inner Classes (recently)

25. Meta Object Protocol

26. Hence, MetaClasses and all the magic

27. Compiles down to bytecode