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 is the top module for the Metro project. This is the module you should depend upon by default. The Maven distribution is meant for use of Metro outside a container. For Tomcat or GlassFish please use the regular distribution with its installation scripts.