public void Dispatch(ImmutableEnvelope e)
{
var commands = e.Items.Select(i => (ICommand <IIdentity>)i.Content).ToList();
var id = commands.First().Id;
var builder = new StringBuilder();
var old = Context.SwapFor(s => builder.AppendLine(s));
Applied results;
try
{
results = Load(commands);
}
finally
{
Context.SwapFor(old);
}
var s1 = builder.ToString();
if (!String.IsNullOrEmpty(s1))
{
Context.Debug(s1.TrimEnd('\r', '\n'));
}
AppendToStream(id, e.EnvelopeId, results, s1);
PublishEvents(id, results);
}
void AppendToStream(IIdentity id, string envelopeId, Applied then, string explanation)
{
var stream = _factory.GetOrCreateStream(IdentityConvert.ToStream(id));
var b = new EnvelopeBuilder("unknown");
b.AddString("caused-by", envelopeId);
if (!String.IsNullOrEmpty(explanation))
{
b.AddString("explain", explanation);
}
foreach (var e in then.Events)
{
b.AddItem((object)e);
}
var data = _streamer.SaveEnvelopeData(b.Build());
Context.Debug("?? Append {0} at v{3} to '{1}' in thread {2}", then.Events.Count,
IdentityConvert.ToStream(id),
Thread.CurrentThread.ManagedThreadId,
then.Version);
if (!stream.TryAppend(data, TapeAppendCondition.VersionIs(then.Version)))
{
throw new InvalidOperationException("Failed to update the stream - it has been changed concurrently");
}
}