1. Developing Applications with the Groovy Beans DSL

Spring Framework 4.0 has native support for a beans{} “DSL” (borrowed from Grails), and you can embed bean definitions in your Groovy application scripts by using the same format. This is sometimes a good way to include external features like middleware declarations, as shown in the following example:

@Configuration(proxyBeanMethods = false)
class Application implements CommandLineRunner {

    SharedService service

    void run(String... args) {
        println service.message


import my.company.SharedService

beans {
    service(SharedService) {
        message = "Hello World"

You can mix class declarations with beans{} in the same file as long as they stay at the top level, or, if you prefer, you can put the beans DSL in a separate file.