MAKE WAY FOR THE ESB

摘要

It's no wonder so many enterprises are looking to build out their SOAs-the agility a service-ori- ented architecture promises, within both IT and the business, is enticing and financially rewarding. The reuse of legacy assets, if not necessarily code, is a benefit long promised by EAI (enterprise application integration) but rarely realized. Granted, agility is one of those marketing words we try to avoid. But in this case it's warranted to describe the ability to modify business processes without code, as well as to describe the capability to modify the inner workings of a business service without affecting the clients and services that rely on the modified service. In a truly agile system, for example, a customer-lookup service can be changed to use an Oracle database from a COBOL copybook, and the client should be none the wiser.