Sending POJOs on Message Queues?

[Glen Mazza]

Hello, I'm new to ActiveMQ messaging queues and unsure if I can place 
and subsequently read POJO's from them.  I have no problems getting 
Strings to work it's just using POJO's that is creating the problem for me.

Here's how I place a DoubleIt POJO on the queue in Camel:  

     ProducerTemplate template = context.createProducerTemplate();
     context.start();
     DoubleIt doubleIt = new DoubleIt();
     doubleIt.setNumberToDouble(5);
     template.sendBody("jms:queue:numbersToDouble", doubleIt);
     Thread.sleep(24000);
     context.stop();
Here's my route:
from("jms:queue:numbersToDouble").process(new DoubleItReader());

And here's my implementation of DoubleItReader:

public class DoubleItReader implements Processor {

  @Override
  public void process(Exchange e) {
     DoubleIt response = e.getIn().getBody(DoubleIt.class);      
     System.out.println("This was returned - Body: " + 
response.getNumberToDouble());
  }

}

The above returns this error when I try to run Camel:
[INFO] [aultMessageListenerContainer-1] DefaultErrorHandler            
ERROR Failed delivery for exchangeId: 
ID:gmazza-desktop-54558-1283773608538-2:1:1:1:1. Exhausted after 
delivery attempt: 1 caught: java.lang.NullPointerException
[INFO] java.lang.NullPointerException
[INFO]     at camel.SOAPResponseReader.process(SOAPResponseReader.java:12)
[INFO]     at 
org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:50)
[INFO]     at 
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:70)

If I try this conversion line instead:
DoubleIt response = (DoubleIt) e.getIn().getBody(Object.class);      

I get this error:
[INFO] Caused by: java.lang.ClassCastException: 
org.apache.camel.component.jms.JmsMessage cannot be cast to 
org.example.schema.doubleit.DoubleIt
[INFO]     at camel.SOAPResponseReader.process(SOAPResponseReader.java:11)
[INFO]     at 
org.apache.camel.impl.converter.AsyncProcessorTypeConverter$ProcessorToAsyncProcessorBridge.process(AsyncProcessorTypeConverter.java:50)
[INFO]     at 
org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:70)
[INFO]     at 
org.apache.camel.processor.DelegateAsyncProcessor.processNext(DelegateAsyncProcessor.java:98)

Does this mean I'm basically limited only to Strings (or to what?) for 
the second parameter of the 
"template.sendBody("jms:queue:numbersToDouble", ???)" command--or am I 
doing something else wrong?

Thanks,
Glen