jar-with-dependencies

Following the model of the Spring Documentation I created a very simple Hello World like application. It spun right up on Eclipse and everything looked great. Sweet! I ran it and could browse to the URL. Fastest development ever. But this has to run on a server, and looking at the jar, it was only about 4K so I knew that it wasn't going to work without a bunch of classpath configuration. To avoid that, I figured I needed a jar-with-dependencies jar. So this is my pom.xml, basically identical to that of the Spring example except adding the jar-with-dependencies goal for the assembly plugin.

I have created a maven jersey starter webapp. Also I have embedded jetty server in my app using jetty plugin. My project is working fine when I run my project using mvn jetty:run command. But when I package my project using mvn clean package command and run the jar file which has name jar-with-dependencies the project throws this exception while returning a json response from a jersey resource. SEVERE: MessageBodyWriter not found for media type=application/json, type=class com.nitish.freecharge.model.Count, genericType=class com.nitish.freecharge.model.Count. Here is my pom.xml file http:/