def gcl = new GroovyClassLoader()
Class proxyClass = gcl.parseClass(new File("<chemin>/CajoProxy.groovy")) // Remplacer <chemin>

def serverHost = '<machine_hote>' // Remplacer <machine_hote>
def queue = proxyClass.metaClass.invokeConstructor("//${serverHost}:1198/void")

queue.echo('Salut tout le monde !')