@synchronized(lock)<EOL><INDENT>def resend_transaction_frames(self, connection, transaction):<DEDENT>
for frame in self._transaction_frames[connection][transaction]:<EOL><INDENT>self.send(frame)<EOL><DEDENT>
Resend the messages that were ACK'd in specified transaction.

This is called by the engine when there is an abort command.

@param connection: The client connection that aborted the transaction.
@type connection: L{coilmq.server.StompConnection}

@param transaction: The transaction id (which was aborted).
@type transaction: C{str}