Fundamentals of Software Architecture

The ability to restart a business transaction (recoverability) is also something not supported with the broker topology. Because other actions have asynchronously been taken through the initial processing of the initiating event, it is not possible to resubmit the initiating event. No component in the broker topology is aware of the state or even owns the state of the original business request, and therefore no one is responsible in this topology for restarting the business transaction (the initiating event) and knowing where it left off. The advantages and disadvantages of the broker topology are summarized in Table 14-1.