(newbie) process() method eating Exchange packet

[Glen Mazza]

Hello, the following route makes SOAP client calls and places the SOAP 
responses in files in the given testfile folder:

  public void configure() {
     from("jms:queue:numbersToDouble")
     .process(new SOAPMessagePreparer())
     .to(CXF_URI)
//    .process(new SOAPResponseReader())
     .to("file://testfile");
  }

Everything works fine.  But when I place a process method between the 
latter two "to" methods (i.e., uncomment the line above), the process 
method will read properly the SOAP response but it seems to "eat" it so 
that only blank files end up subsequently getting written to the 
testfile folder.

Here's my SOAPResponseReader:

public class SOAPResponseReader implements Processor {
  @Override
  public void process(Exchange e) {
     System.out.println("This was returned - Body: " + 
e.getIn().getBody(String.class));
  }
}

Any idea what's happening?  What do I need to do to SOAPResponseReader 
so that the final to("file://testfile") in the route will store the SOAP 
response in each file again?

Thanks,
Glen