ThreadLocal to store ServletRequest and Response in servlet: what for?

Question

Once I have came across a pattern, where ServletRequest and response objects are put to servlet\'s local ThreadLocal variables. The servlet class h

Answer 1

They allow you to gain access to the HttpServletRequest and HttpServletResponse from other classes within your project without having to pass references to these objects to the other classes. It's not a pattern I particularly like as it tends to mix up your web tier code with your business logic and makes unit testing more difficult.