We are staying in front of new world - all major browsers either support already or plan to support in next major version HTML5 (not in scope of this article) & WebSockets (main subject of the article). In 6 to 9 months we as application developers will have in our hands extremely powerful client side tools to build new generation of the Web. But are we ready on server side? And if not, what the point in having powerful and reliable communication channel between browser and server a

• GMaven
• Groovy Transforms — Provides additional AST Transforma

We can pad and center strings:

assert 'hello'.padRight(8,'+').padLeft(10,'+') == '++hello+++'
assert 'hello'.padLeft(7).padRight(10) == '  hello   '
assert 'hello'.center(10, '+')

import java.lang.annotation.*

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
@interface Anno {
   
String value() default ""
}

class Foo {
   
@Anno("A cool method!")
   
void method() {}
}

def f = new Foo()

def method = Foo.getMethod("method", [] as Class[])
assert method.isAnnotationPresent(Anno)
assert me

import groovy.xml.*

def out = new StringWriter()
def xml = new MarkupBuilder(out)

data = [[type: 'dog', name: 'fido', barkVolume: 'loud'],
      
[type: 'cat', name: 'moggy', remainingLives: 9],
      
[type: 'budgie', wingSpan: 3]]


xml.pets() {

data.each {item ->

pet() {
   
item.each { attributes ->