Example #1
0
 @Override
 public void initialize() {
   // Increment the session counter
   int sessions = ApplicationSettings.SESSIONS.getValue();
   ApplicationSettings.SESSIONS.setValue(sessions + 1);
   // Record the time between sessions
   long lastShutdown = ApplicationSettings.LAST_SHUTDOWN_TIME.getValue();
   long downtime;
   if (lastShutdown == 0) downtime = DEFAULT_DOWNTIME;
   else downtime = Math.max(0, (clock.now() - lastShutdown) / 1000);
   // If the number of downtimes is greater that the number of uptimes,
   // the last session must have ended without recording the uptime or
   // shutdown time. To avoid double-counting the downtime we should
   // overwrite the last downtime instead of appending.
   String[] downtimes = ApplicationSettings.DOWNTIME_HISTORY.get();
   String[] uptimes = ApplicationSettings.UPTIME_HISTORY.get();
   if (downtimes.length > uptimes.length)
     downtimes = updateHistory(downtimes, Long.toString(downtime));
   else downtimes = appendToHistory(downtimes, Long.toString(downtime));
   ApplicationSettings.DOWNTIME_HISTORY.set(downtimes);
   // Measure the time between refreshes
   lastUpdateTime = clock.now();
 }
Example #2
0
 /** Refreshes the uptime statistics. Package access for testing. */
 void refreshStats() {
   long now = clock.now();
   long elapsed = (now - lastUpdateTime) / 1000;
   if (elapsed > 0) {
     currentUptime += elapsed;
     updateUptimeHistory(currentUptime);
     long totalUptime = ApplicationSettings.TOTAL_UPTIME.getValue() + elapsed;
     ApplicationSettings.TOTAL_UPTIME.setValue(totalUptime);
     int sessions = ApplicationSettings.SESSIONS.getValue();
     if (sessions > 0) {
       ApplicationSettings.AVERAGE_UPTIME.setValue(totalUptime / sessions);
     }
     ApplicationSettings.FRACTIONAL_UPTIME.setValue(stats.calculateFractionalUptime());
     ApplicationSettings.LAST_SHUTDOWN_TIME.setValue(now); // Pessimistic
   }
   lastUpdateTime = now;
 }