/// <summary>
/// Dispatches the message by forwarding it according to the routing rules.
/// </summary>
/// <param name="message">The message.</param>
public void DispatchMessage(ImmutableEnvelope message)
{
var route = _routerRule(message);
// allow discarding messages, if explicitly allowed
if (route == "memory:null")
{
return;
}
var items = route.Split(new[] { ':' }, 2);
string queueName;
string endpoint;
if (items.Length == 1)
{
queueName = route;
endpoint = "default";
}
else
{
endpoint = items[0];
queueName = items[1];
}
IQueueWriterFactory factory;
if (!_queueRegistry.TryGet(endpoint, out factory))
{
var s = string.Format(
"Route '{0}' was not handled by any single dispatcher. Did you want to send to 'memory:null' or 'memory:{0}' instead? Please, read documentation on Routing Dispatcher.",
route);
throw new InvalidOperationException(s);
}
factory.GetWriteQueue(queueName).PutMessage(message);
return;
}
void Dispatch(string id, IEnumerable <ICommand> commands)
{
var stream = _factory.GetOrCreateStream(id);
var records = stream.ReadRecords(0, int.MaxValue).ToList();
var events = records
.Select(tr => _streamer.ReadAsEnvelopeData(tr.Data))
.SelectMany(i => i.Items)
.Select(i => (IEvent)i.Content)
.ToList();
var then = AggregateFactory
.LoadProject(events, commands)
.Select(e => new MessageBuilder(e.GetType(), e)).ToList();
if (then.Count == 0)
{
return;
}
// events are stored here as envelopes )
var b = new EnvelopeBuilder("unknown");
foreach (var e in then)
{
b.Items.Add(e);
}
var version = records.Count == 0 ? 0 : records.Last().Version;
var data = _streamer.SaveEnvelopeData(b.Build());
var result = stream.TryAppend(data, TapeAppendCondition.VersionIs(version));
if (!result)
{
throw new InvalidOperationException(
"Data was modified concurrently, and we don't have merging implemented, yet");
}
var args = _path.Split(':');
IQueueWriterFactory factory;
if (!_queue.TryGet(args[0], out factory))
{
throw new InvalidOperationException("Not found " + _path);
}
var arVersion = events.Count + 1;
var arName = id;
for (int i = 0; i < then.Count; i++)
{
var name = string.Format("{0}/{1}/{2}", arName, arVersion, i);
var builder = new EnvelopeBuilder(name);
builder.Items.Add(then[i]);
builder.AddString("from-entity", arName);
factory.GetWriteQueue(args[1]).PutMessage(builder.Build());
}
}
