=head1 Internal Structure

For the curious or the brave, here is an ASCII diagram of how the pieces fit:

  +---------+      +---------+     +--------+                         
  | Browser | <--> | Adaptor | --> | Mapper |                         
  +---------+      +---------+     +--------+                         
                        ^              |                              
                        |              |                              
  +---------------------+              |                              
  |      +-------------------+---------+----------+          
  |      |                   |                    |              
  |      V                   V                    V              
  |    +---------+         +---------+          +---------+         
  |    | Session |         | Session |          | Session |            
  |    | Request |         | Request |          | Request |         
  |    | Queue   |         | Queue   |          | Queue   |         
  |    |    |    |         |    |    |          |    |    |        
  |    |    V    |         |    V    |          |    V    |         
  |    +---------+         +---------+          +---------+          
  |      |                   |                    |             
  |      V                   V                    V              
  |  +-----+   +------+   +-----+   +------+   +-----+   +------+
  |  | Cur |<->| Your |   | Cur |<->| Your |   | Cur |<->| Your |
  |  | Req |   | Code |   | Req |   | Code |   | Req |   | Code |
  |  +-----+   +------+   +-----+   +------+   +-----+   +------+
  |     |                    |                    |
  |     V                    V                    V
  +-----+--------------------+--------------------+

  ** "Cur Req" == "Current Request"

Basically, the Adaptor accepts requests from the browser, hands them off to the
Mapper, which then queues them into the correct session queue (or creates a new
queue).

When Your Code calls C<< $request->next >> the Current Request overwrites
itself with the next item in the queue (or waits until there is one).

Most of the time you will have pretty empty queues -- they are mostly there for
safety, in case you have a lot of incoming requests and running sessions.

For further internal development documentation, please see the wiki or email
me.

=cut