This chapter may seem to have very little to do with software fortresses. In fact, however, transactional coordination is a major issue for software fortresses . Different technologies have different support for different flavors of transactions. The support that these technologies offer for transactions often influences our choice of which technologies to use in which fortress situations. In a business application fortress, for example, it is important to be able to coordinate the work of different entities within a single, tightly coupled transaction, even when each of those entities is updating different transactional resources. Therefore, for a business application fortress we need intrafortress communication technologies that support tightly coupled multiple-resource transactions. The main points of this chapter are these:
This chapter has introduced the fundamentals of transactions. I will expand on these basic concepts throughout the rest of the book. |