smaller-grained services-those that help realize the higher level of services-are identified by examining the existing legacy functionality and deciding how to create adaptors and wrappers, or componentizing the legacy to externalize the desired functionality often locked within the system 小粒度的服务--这些可以帮助实现高级别的服务--通过检查遗留功能性和决定如何创建适配器、封装器,或者组合遗留系统来具体化系统内经常调用的期望功能性可以来鉴别。