Handle the first occurence of an error as urgent (#28)

Author: staabm

src/sysmonitor/SystemMonitor.php

@@ -101,7 +101,10 @@ private function rateAndStore(SystemEvent $sysEvt)
         $count = $this->storage->count($sysEvt);
 
         // uplift severity..
-        if ($count >= 10 && $evt instanceof RequestExceptionEvent) {
+        if ($count === 0 && $evt instanceof RequestExceptionEvent) {
+            // report the first occurence immediately, but don't report every single error
+            $sysEvt->severity = SystemEvent::SEVERITY_URGENT;
+        } elseif ($count >= 10 && $evt instanceof RequestExceptionEvent) {
             // .. based on frequency of the same failure
             $sysEvt->severity = SystemEvent::SEVERITY_URGENT;
         } elseif ($count >= 20 && $evt instanceof RequestStatsEvent) {