title: Using MDC with Spring Integration
body: <p>I want to introduce effective logging with in my Spring Integration implementation. I already have global wire-tap which logs the payload and headers. However we have lots service activators which has lots of business logic. I want to log important information like user id, request id in every log. We are using SLF4J. The spring integration flow has number of thread pool executors which are managed by Spring integration.</p>
  
  <p>Should I go for AOP where before every method call, I retrieve the userid and request id from message headers and set it in SLF4J MDC? and then clear it once the method execution is over. It would have clearing logic in finally block. Is this a right approach or this would create performance bottle neck? Not sure why this has not been discussed much as in multithreaded SI flow, it would become very difficult to debug logs without user information.</p>
  
  <p>If there is a better approach, please suggest.</p>