Call Java APIs from Genero in a SOA environment

How to call a Java library from Genero in a SOA environment, using Genero and Java Web services.

This can easily be done using the Java JAX-WS framework on a server, and a Genero application for the client part.
Note: There is no strong linkage between Genero and a java JVM. You can, for instance, upgrade the Java service without changing anything in your Genero code.

These topics are presented as a tutorial that uses a Java barcode creation library to build a picture from a code.