/// <summary>
/// Notify the stability tracker that a crash has occured
/// </summary>
public void NotifyCrash()
{
InstrumentationLogger.LogAnonymousTimedEvent(
"Stability", "TimeBetweenFailure", timeSinceLastCrash.Elapsed);
timeSinceLastCrash.Restart();
}
/// <summary>
/// Start up and report the status of the last shutdown
/// </summary>
public static void Startup()
{
StabilityUtils.IsLastShutdownClean = IsLastShutdownClean();
String cleanShutdownValue = Registry.GetValue(REG_KEY, SHUTDOWN_TYPE_NAME, null) as String;
String uptimeValue = Registry.GetValue(REG_KEY, UPTIME_NAME, null) as String;
bool isUptimeSpanValid = false;
TimeSpan uptimeSpan = TimeSpan.MinValue;
long uptimeMs;
if (long.TryParse(uptimeValue, out uptimeMs))
{
uptimeSpan = TimeSpan.FromMilliseconds(uptimeMs);
isUptimeSpanValid = true;
}
if (cleanShutdownValue == null || uptimeValue == null)
{
InstrumentationLogger.LogAnonymousEvent("FirstTimeStartup", "Stability");
}
else
{
switch (cleanShutdownValue)
{
case CLEAN_SHUTDOWN_VALUE:
InstrumentationLogger.LogAnonymousEvent("Clean shutdown", "Stability");
if (isUptimeSpanValid)
{
InstrumentationLogger.LogAnonymousTimedEvent("Stability", "Clean Uptime", uptimeSpan);
}
break;
case CRASHING_SHUTDOWN_VALUE:
InstrumentationLogger.LogAnonymousEvent("Crashing shutdown", "Stability");
if (isUptimeSpanValid)
{
InstrumentationLogger.LogAnonymousTimedEvent("Stability", "Dirty Uptime", uptimeSpan);
}
break;
case ASSUMING_CRASHING_SHUTDOWN_VALUE:
//This is the case where we don't know what happened, so we're defaulting
InstrumentationLogger.LogAnonymousEvent("Assumed crashing shutdown", "Stability");
if (isUptimeSpanValid)
{
InstrumentationLogger.LogAnonymousTimedEvent("Stability", "Assumed Dirty Uptime", uptimeSpan);
}
break;
default:
//Something went wrong, fail out with 'unknown' data.
InstrumentationLogger.LogAnonymousEvent("Unknown shutdown", "Stability");
Debug.WriteLine("Unknown shutdown key value: " + cleanShutdownValue);
break;
}
}
// If we don't do anything to explicitly set the type of shutdown assume we hard-crashed
// this is pesimistic
Registry.SetValue(REG_KEY, SHUTDOWN_TYPE_NAME, ASSUMING_CRASHING_SHUTDOWN_VALUE);
}