protected void ReceivedUpdate()
{
IMdbSystemMailboxPinger mdbSystemMailboxPinger = this.pingerReference;
if (mdbSystemMailboxPinger == null && PingerCache.CreatePingerTestHook != null)
{
mdbSystemMailboxPinger = PingerCache.CreatePingerTestHook(this.MdbGuid);
}
if (mdbSystemMailboxPinger != null)
{
if (mdbSystemMailboxPinger.Pinging)
{
ExTraceGlobals.DatabasePingerTracer.TraceDebug <Guid>((long)this.GetHashCode(), "RPC traffic due to database pinger for Mdb: {0}", this.MdbGuid);
Interlocked.Increment(ref this.consecutivePings);
}
else
{
Interlocked.Exchange(ref this.consecutivePings, 0);
}
if (PingerDependentHealthMonitor.OnPingIntervalUpdate != null)
{
PingerDependentHealthMonitor.OnPingIntervalUpdate(base.Key, this.consecutivePings, this.CurrentPingInterval);
}
}
}
private void PingIfNecessary()
{
if (this.pingCheckedOrScheduled)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.PingAlreadyScheduled);
return;
}
bool flag = true;
try
{
lock (this.instanceLock)
{
if (this.pingCheckedOrScheduled)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.PingAlreadyScheduled);
return;
}
this.pingCheckedOrScheduled = true;
}
if (this.RawLastUpdateUtc != DateTime.MinValue && TimeProvider.UtcNow - this.RawLastUpdateUtc < this.PreviousPingInterval && !PingerDependentHealthMonitor.IgnorePingProximity)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.TrafficTooClose);
}
else if (this.Expired)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.MonitorExpired);
ExTraceGlobals.DatabasePingerTracer.TraceDebug <ResourceKey>((long)this.GetHashCode(), "[PingerDependentHealthMonitor.Execute] Will not ping on resource {0} because the monitor is marked as expired.", base.Key);
}
else
{
IMdbSystemMailboxPinger mdbSystemMailboxPinger = PingerCache.Singleton.Get(this.MdbGuid);
if (!object.ReferenceEquals(mdbSystemMailboxPinger, this.pingerReference))
{
lock (this.instanceLock)
{
if (!object.ReferenceEquals(mdbSystemMailboxPinger, this.pingerReference))
{
this.pingerReference = mdbSystemMailboxPinger;
}
}
}
if (mdbSystemMailboxPinger == null)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.FailedToGetPinger);
ExTraceGlobals.DatabasePingerTracer.TraceDebug <ResourceKey>((long)this.GetHashCode(), "[PingerDependentHealthMonitor.Execute] PingerCache returned a null pinger. Will not ping. Resource: {0}", base.Key);
}
else if (mdbSystemMailboxPinger.LastPingAttemptUtc != DateTime.MinValue && TimeProvider.UtcNow - mdbSystemMailboxPinger.LastPingAttemptUtc < this.PreviousPingInterval && !PingerDependentHealthMonitor.IgnorePingProximity)
{
TimeSpan arg = TimeProvider.UtcNow - mdbSystemMailboxPinger.LastPingAttemptUtc;
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.PingAttemptTooClose);
ExTraceGlobals.DatabasePingerTracer.TraceDebug <ResourceKey, TimeSpan, TimeSpan>((long)this.GetHashCode(), "[PingerDependentHealthMonitor.Execute] Will not ping on resource {0} because only {1} has elapsed since the last ping attempt. Expected interval: {2}", base.Key, arg, this.PreviousPingInterval);
}
else
{
ThreadPool.QueueUserWorkItem(delegate(object state)
{
try
{
IMdbSystemMailboxPinger mdbSystemMailboxPinger2 = PingerCache.Singleton.Get(this.MdbGuid);
if (mdbSystemMailboxPinger2 == null)
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.FailedToGetPinger);
ExTraceGlobals.DatabasePingerTracer.TraceDebug <ResourceKey>((long)this.GetHashCode(), "[PingerDependentHealthMonitor.Execute] PingerCache returned a null pinger. Will not ping. Resource: {0}", base.Key);
}
else if (mdbSystemMailboxPinger2.Ping())
{
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.Pinged);
}
else
{
Interlocked.Increment(ref this.consecutivePings);
if (PingerDependentHealthMonitor.OnPingIntervalUpdate != null)
{
PingerDependentHealthMonitor.OnPingIntervalUpdate(base.Key, this.consecutivePings, this.CurrentPingInterval);
}
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.FailedPing);
}
}
finally
{
lock (this.instanceLock)
{
this.pingCheckedOrScheduled = false;
}
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.PingLockReleased);
}
});
flag = false;
}
}
}
finally
{
if (flag)
{
lock (this.instanceLock)
{
this.pingCheckedOrScheduled = false;
}
this.DoOnExecuteForTest(PingerDependentHealthMonitor.PingResult.PingLockReleased);
}
}
}