Metro is a high-performance, extensible, easy-to-use web service stack. It is a one-stop shop for all your web service needs, from the simplest hello world web service to reliable, secured, and transacted web service that involves .NET services. This module is exclusively meant for use in GlassFish V3 development. It is highly unlikely to work in any other environment. If you are looking for a Maven distribution of Metro, please use com.sun.xml.ws.webservices.