public void InvokeEvent(object @event)
{
var type = @event.GetType();
List <Wire> info;
if (!Dict.TryGetValue(type, out info))
{
return;
}
try
{
var sw = new Stopwatch();
foreach (var wire in info)
{
sw.Restart();
wire.Call(@event);
sw.Stop();
var seconds = sw.Elapsed.TotalSeconds;
if (seconds > 2 && wire.@object != null)
{
SystemObserver.Notify("[Warn]: {0}\ttook {1} seconds to process event {2}", [email protected]().Name, seconds, @event.ToString());
}
}
}
catch (TargetInvocationException ex)
{
if (null != InternalPreserveStackTraceMethod)
{
InternalPreserveStackTraceMethod.Invoke(ex.InnerException, new object[0]);
}
throw ex.InnerException;
}
}
PublishResult PublishEventsIfAnyNew(long initialPosition, int count)
{
var records = _store.EnumerateAllItems(initialPosition, count);
var currentPosition = initialPosition;
var publishedCount = 0;
foreach (var e in records)
{
if (e.StoreVersion < currentPosition)
{
throw new InvalidOperationException(string.Format("Retrieved record with position less than current. Store versions {0} <= current position {1}", e.StoreVersion, currentPosition));
}
if (_recordShouldBePublished(e))
{
for (int i = 0; i < e.Items.Length; i++)
{
// predetermined id to kick in event deduplication
// if server crashes somehow
var envelopeId = "esp-" + e.StoreVersion + "-" + i;
var item = e.Items[i];
publishedCount += 1;
_sender.Send(item, envelopeId);
}
}
currentPosition = e.StoreVersion;
}
var result = new PublishResult(initialPosition, currentPosition, count);
if (result.Changed)
{
SystemObserver.Notify("{0}\t[sys] Message store pointer moved to {1} ({2} published)", _name, result.FinalPosition, publishedCount);
}
return(result);
}
public static IDisposable When <T>(Action <T> when, bool includeTracing = true) where T : class
{
var eventsObserver = new ImmediateEventsObserver();
Action <ISystemEvent> onEvent = @event =>
{
var type = @event as T;
if (type != null)
{
when(type);
}
};
eventsObserver.Event += onEvent;
var list = new List <IObserver <ISystemEvent> >
{
eventsObserver
};
if (includeTracing)
{
list.Add(new ImmediateTracingObserver());
}
var old = SystemObserver.Swap(list.ToArray());
return(new Disposable(() =>
{
SystemObserver.Swap(old);
eventsObserver.Event -= onEvent;
}));
}
public void Send(object message, string envelopeId, params MessageAttribute[] attributes)
{
var envelope = new ImmutableEnvelope(envelopeId, DateTime.UtcNow, message, attributes);
var data = _streamer.SaveEnvelopeData(envelope);
_queue.PutMessage(data);
SystemObserver.Notify(new EnvelopeSent(
_queue.Name,
envelope.EnvelopeId,
envelope.Message.GetType().Name,
envelope.Attributes));
}
public static IDisposable When <T>(Action <T> when, bool includeTracing = true) where T : class
{
var observer = new EventsObserver(@event =>
{
var type1 = @event as T;
if (type1 != null)
{
when(type1);
}
if (includeTracing)
{
Trace.WriteLine(@event);
}
});
var old = SystemObserver.Swap(new IObserver <ISystemEvent>[] { observer });
return(new Disposable(() => SystemObserver.Swap(old)));
}
void InnerSendBatch(Action <EnvelopeBuilder> configure, object[] messageItems,
IdGeneration id = IdGeneration.Default)
{
string envelopeId;
switch (id)
{
case IdGeneration.Default:
envelopeId = _idGenerator();
break;
case IdGeneration.HashContent:
envelopeId = HashContents(configure, messageItems);
break;
default:
throw new ArgumentOutOfRangeException("id");
}
var builder = new EnvelopeBuilder(envelopeId);
foreach (var item in messageItems)
{
builder.AddItem(item);
}
configure(builder);
var envelope = builder.Build();
var data = _streamer.SaveEnvelopeData(envelope);
var queue = GetOutboundQueue();
queue.PutMessage(data);
SystemObserver.Notify(new EnvelopeSent(queue.Name, envelope.EnvelopeId,
envelope.Items.Select(x => x.MappedType.Name).ToArray(), envelope.GetAllAttributes()));
}
public void VerifyEventStreamSanity()
{
var result = _storage.GetSingletonOrNew <PublishCounter>();
if (result.Position != 0)
{
SystemObserver.Notify(_name + "\tContinuing work with existing event store");
return;
}
var store = _store.EnumerateAllItems(0, 100).ToArray();
if (store.Length == 0)
{
SystemObserver.Notify(_name + "\tOpening new event stream");
//_sender.SendHashed(new EventStreamStarted());
return;
}
if (store.Length == 100)
{
throw new InvalidOperationException(
"It looks like event stream really went ahead (or storage pointer was reset). Do you REALLY mean to resend all events?");
}
}