How to exclude pages / pages with specific components from the CQ dispatcher cache?

If you ever need to explicitly exclude a page or a page containing a specific component from the dispatcher cache, you can do so by setting the following response header, for example in a component's JSP, like this:

    <% 
      response.setHeader("Dispatcher", "no-cache"); 
    %> 

For more information see: http://helpx.adobe.com/dispatcher/kb/DispatcherNoCache.html.

Additional Notes:

   > you do not need to "hardcode" any content paths in your dispatcher config, but can control this dynamically from CQ. This means if you have certain page types or templates that should not be cached, you can use them dynamically anywhere in your content tree without having to modify the dispatcher cache config
   > since it is a http request header, it does not need to be added in a specific position on the HTML page. This means any component can "set" it and make the page a no-cache page.
   > you can even "switch" a previously cached page that's in the dispatcher cache directory to a dynamic no-cache version on the fly: all you need to do is activate that page OR auto-invalidate it by activating another page in the same statfileslevel subtree. The dispatcher will permanently remove the page from it's directory in that case. This allows for scenarios like: a component that requires a page not to be cached is added on to a previously cached page, the page is activated and henceforth no longer cached (the header is added to CQs response by the component).
  
   Scenarios where we can use this:
  
    #Cache (or un-cache) pages based on a component driven design - just like the example above;
    #Get away from content hierarchy or page-specific based caching designs. Earlier we had to have /ajax/dynamic/* as non-cached and any page that was not to be cached had to be put in this location (what we did for NASCAR). With this approach i can have a page anywhere and use the template to instruct dispatcher to ignore it. This would mean any new pages using same template would also follow same caching strategy;
    #Dispatcher can be configured to say "cache everything" and then i can control caching from CQ page design hence decoupling the two