public EventReader(IEventStoreReader reader, PersistedEventFactory factory)
{
Argument.Requires(reader != null, nameof(reader));
Argument.Requires(factory != null, nameof(factory));
_workerProps = Props.Create <ReadWorker>(reader, factory);
Receive <ReadRequest>(r => HandleRequest(r));
}
void InitializeServices(EvenStartInfo startInfo)
{
var serializer = startInfo.Serializer;
var store = startInfo.Store;
var options = startInfo.Options;
var registry = new EventRegistry();
var eventFactory = new PersistedEventFactory(registry, serializer);
foreach (var kvp in startInfo.EventTypes)
{
registry.Register(kvp.Key, kvp.Value);
}
// initialize reader
var readerProps = EventStoreReader.CreateProps(store, eventFactory, options);
_reader = Context.ActorOf(readerProps, "reader");
// initialize dispatcher
var dispatcherProps = EventDispatcher.CreateProps(_reader, options);
_dispatcher = Context.ActorOf(dispatcherProps, "dispatcher");
// initialize writer
var writerProps = EventStoreWriter.CreateProps(store, serializer, _dispatcher, options);
_writer = Context.ActorOf(writerProps, "writer");
// initialize event processor supervisor
var eventProcessorsProps = EventProcessorSupervisor.CreateProps(options);
_eventProcessors = Context.ActorOf(eventProcessorsProps, "eventprocessors");
// initialize projection streams supervisor
var projectionStreamsProps = ProjectionStreamSupervisor.CreateProps(_reader, _writer, options);
_projectionStreams = Context.ActorOf(projectionStreamsProps, "projectionstreams");
// initialize projections supervisor
var projectionProps = ProjectionSupervisor.CreateProps(_projectionStreams, options);
_projections = Context.ActorOf(projectionProps, "projections");
// initialize command processors supervisor
var commandProcessorsProps = CommandProcessorSupervisor.CreateProps(_writer, options);
_commandProcessors = Context.ActorOf(commandProcessorsProps, "commandprocessors");
// initialize aggregates
var aggregatesProps = AggregateSupervisor.CreateProps(_reader, _writer, options);
_aggregates = Context.ActorOf(aggregatesProps, "aggregates");
}
protected async Task WriteEvents(PersistenceRequest request)
{
var events = request.Events;
// serialize the events into raw events
var rawEvents = UnpersistedRawEvent.FromUnpersistedEvents(events, _serializer);
// writes all events to the store
await _writer.WriteStreamAsync(request.Stream, request.ExpectedStreamSequence, rawEvents);
// publishes the events in the order they were sent
for (int i = 0, len = events.Count; i < len; i++)
{
var e = events[i];
var re = rawEvents[i];
var persistedEvent = PersistedEventFactory.FromUnpersistedEvent(re.GlobalSequence, e);
// publish to the event stream
_dispatcher.Tell(persistedEvent);
}
}
async Task Write(IReadOnlyList <BufferEntry> bufferEntries)
{
// creates a list of "Event + Sender" entries
var entries = bufferEntries.SelectMany(entry => entry.Request.Events.Select(@event => new { Event = @event, Sender = entry.Sender })).ToList();
// serialize the events into raw events
var rawEvents = UnpersistedRawEvent.FromUnpersistedEvents(entries.Select(e => e.Event), _serializer);
// writes to the store
await _writer.WriteAsync(rawEvents);
// sends the events to the dispatcher
for (int i = 0, len = entries.Count; i < len; i++)
{
var sender = entries[i].Sender;
var e = entries[i].Event;
var re = rawEvents[i];
var persistedEvent = PersistedEventFactory.FromUnpersistedEvent(re.GlobalSequence, e);
_dispatcher.Tell(persistedEvent);
}
}
