Getting messages out of XML-based routes

[Aaron Crickenberger]

Say I have the following route defined in XML:

<route>
        <from uri="seda:start" />
        <process ref="myProcessorA" />
        <process ref="myProcessorB" />
        <to uri="seda:end" />
<route>
If the myProcessorA processor recognizes that a message it's  
processing doesn't make business sense, what could it do to prevent  
the message from going any further in the route?

- aaron