internal async Task DispatchEventAsync(UnwindedDomainEvent unwindedEvent)
{
if (unwindedEvent == UnwindedDomainEvent.LastEvent)
{
Finished = true;
_lastCheckpointRebuilded = LastCheckpointDispatched; //Set to zero metrics, we dispatched everything.
return;
}
var chkpoint = unwindedEvent.CheckpointToken;
if (chkpoint > LastCheckpointDispatched)
{
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("Discharded event {0} commit {1} because last checkpoint dispatched for slot {2} is {3}.", unwindedEvent.CommitId, unwindedEvent.CheckpointToken, SlotName, _maxCheckpointDispatched);
}
return;
}
Interlocked.Increment(ref RebuildProjectionMetrics.CountOfConcurrentDispatchingCommit);
TenantContext.Enter(_config.TenantId);
try
{
string eventName = unwindedEvent.EventType;
foreach (var projection in _projections)
{
var cname = projection.Info.CommonName;
long elapsedticks;
try
{
QueryPerformanceCounter(out long ticks1);
await projection.HandleAsync(unwindedEvent.GetEvent(), true).ConfigureAwait(false);
QueryPerformanceCounter(out long ticks2);
elapsedticks = ticks2 - ticks1;
KernelMetricsHelper.IncrementProjectionCounterRebuild(cname, SlotName, eventName, elapsedticks);
}
catch (Exception ex)
{
_logger.FatalFormat(ex, "[Slot: {3} Projection: {4}] Failed checkpoint: {0} StreamId: {1} Event Name: {2}",
unwindedEvent.CheckpointToken,
unwindedEvent.PartitionId,
eventName,
SlotName,
cname
);
HealthChecks.RegisterHealthCheck($"RebuildDispatcher, slot {SlotName} - FailedCheckpoint {unwindedEvent.CheckpointToken}", () =>
HealthCheckResult.Unhealthy(ex)
);
throw;
}
_metrics.Inc(cname, eventName, elapsedticks);
if (_logger.IsDebugEnabled)
{
_logger.DebugFormat("[{3}] [{4}] Handled checkpoint {0}: {1} > {2}",
unwindedEvent.CheckpointToken,
unwindedEvent.PartitionId,
eventName,
SlotName,
cname
);
}
}
}
catch (Exception ex)
{
_logger.ErrorFormat(ex, "Error dispathing commit id: {0}\nMessage: {1}\nError: {2}",
unwindedEvent.CheckpointToken, unwindedEvent.Event, ex.Message);
HealthChecks.RegisterHealthCheck($"RebuildDispatcher, slot {SlotName} - GeneralError", () =>
HealthCheckResult.Unhealthy(ex)
);
throw;
}
_lastCheckpointRebuilded = chkpoint;
KernelMetricsHelper.MarkEventInRebuildDispatchedCount(SlotName, 1);
Interlocked.Decrement(ref RebuildProjectionMetrics.CountOfConcurrentDispatchingCommit);
}
