Software Fortresses: Modeling Enterprise Architectures

Summary

Here's a review of the most important points of this chapter:

• Whereas synchronous drawbridges are based on component technologies, asynchronous drawbridges are based on message queues.

• The message queues that are used for asynchronous drawbridges are both persistent and transactional.

• The insertion of an infogram is transactionally coordinated with work being done by the donor fortress by DTC, the distributed transaction coordinator.

• The receipt of an infogram is also transactionally coordinated by DTC, this time with work being done by the recipient fortress.

• Sending of the infogram is fairly well coupled with receipt of the infogram.

• Homogeneous asynchronous drawbridges are based on a configuration in which a component veneer is placed over ...