The messagin examples require that JMS connection factories and 
destination resources be created before deploying and running
the samples. 

More specifically, you must create a javax.jms.TopicConnectionFactory
resource with an JNDI name jms/TopicConnectionFactory, and a 
javax.jms.Topic destination resource with JNDI name jms/Topic. In 
Sun RI/Glassfish, the destination resource must have an additional
property that links it with a physical destination. To provide that, 
add the property "name" with value "Topic" to that resource in the admin 
GUI.