Following 
WEB-INF/web.xml descriptor will enable JEST to
	operate on a persistence unit named 
${persistence.unit}. Of course, JEST 
	servlet must be in the same module scope of the application that is using using 
	
${persistence.unit} as its persistence unit.  
	
<servlet>
  <servlet-name>${servlet.name}</servlet-name>
  <servlet-class>org.apache.openjpa.persistence.jest.JESTServlet</servlet-class>
	<init-param>
	  <param-name>persistence.unit</param-name>
	  <param-value>${persistence.unit}</param-value>
	</init-param>
</servlet>
<servlet-mapping>
  <servlet-name>${servlet.name}</servlet-name>
  <url-pattern>/${servlet.name}/*</url-pattern>
</servlet-mapping>
	When an web application module named 
${webapp.name} containing the above JEST servlet 
	in a servlet container runs on 
${server.name} at port ${server.port}, then the JEST servlet
	can be accessed at 
	
http://${server.name}:${server.port}/${webapp.name}/${servlet.name}/ 
	
	(
do not miss the the trailing forward-slash / character)