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

Others have pretty much stated what is the use of Thread Locals in the scenario you presented. But be warned though, Thread Local relying implementations are "thread" specific and break when things move away from a single thread per request model. Example would be event based servers wherein a handful of threads are used for lots of user requests concurrently.