#ifndef __UserRequestControl_h_
#define __UserRequestControl_h_

/* This module takes care of the real-time data requests.  Each refresh request
 * is sent to this thread.  This thread waits until it gets a refresh request
 * AND enough time has passed, then it sends the request to the database and
 * sends the results to the user.
 *
 * All streaming requests are put in one thread to make sure we are in control
 * of the system load.  If the database is backed up, all requests will wait
 * in an orderly fashion in a queue.  If we have too many users at once, they
 * will wait their turn in line, and will not block access to the database
 * from anyone else.
 *
 * This module is also responsible for routing history requests.  Since all
 * realtime and historical data goes to the same window, it is important to
 * keep the requests organized.  If, for example we request a little bit of
 * history followed by the realtime data, but the history request is not ready
 * in time, then we cancel that request and just start serving the realtime
 * data.
 */

bool initUserRequestControl();


#endif