indiWiz.com

Writing WebService client in Groovy is simple.

import groovy.net.soap.SoapClient

def proxy = new SoapClient("http://localhost:7777/path/to/endpoint?WSDL")
def result = proxy.sayHello("Subhash")

println result

sayHello() is the operation name.

More details here. See the Installation part, you need to put the Groovy SOAP Jar in ${user.home}/.groovy/lib.