Dynamic Proxies in Java and .NET

摘要

Discrete modules such as components and classes are designed to maximize functional cohesion while minimizing the interaction between modules. In typical object-oriented systems, these components are defined by the functional boundaries of the domain, even though many concerns are not aligned along these functional boundaries. Concerns such as logging, security, persistence, threading, and caching usually touch most areas of an application. While it is common to pull these concerns into separate subsystems, thereby limiting the degree to which they are spread throughout the code, explicit calls to these subsystems decrease cohesion and increase coupling of resulting modules. Consequently, one of the primary goals of software design is separation of concerns.