Add additional fields to message trace output in core/runtime/.../MessageTrace.java :

Consumer : exchange.getConsumer().getName()
Provider : exchange.getProvider().getName()
MEP : exchange.getContract().getConsumerOperation().getExchangePattern()

!!!NOTE!!!
The message trace handler currently executes before the addressing handler, which means exchange.getProvider() will be null during the IN phase. This will likely change in the near future, but for now you'll need a null check in the message trace logic and print out something like [unassigned] for now.

Here's an example (new/changed fields marked with '*'):

------- Begin Message Trace -------
Consumer* -> {urn:switchyard-quickstart:bean-service:0.1.0}OrderService
Provider* -> {urn:switchyard-quickstart:bean-service:0.1.0}OrderService
Operation -> submitOrder
MEP* -> IN_OUT
Phase -> IN
State -> OK
Exchange Context -> 
...
Message Context -> 
...
Message Content -> 
...
------ End Message Trace -------