func (r *Repository) getStreamChangeFromSource(source sourcing.EventSource) (*EventStreamChange, error) {
sourceId := source.Id()
events := source.Events()
eventCount := int64(len(events))
fromSequence := int64(0)
streamEvents := make([]*Event, eventCount)
for i, e := range events {
Log.Notice("%T", e)
name := r.namer.GetEventName(e)
sequence := NewEventSequence(fromSequence + int64(i))
id := NewEventId()
timestamp := time.Now()
streamEvents[i] = NewEvent(id, name, sequence, timestamp, e)
}
return &EventStreamChange{
StreamId: EventStreamId(sourceId),
From: fromSequence,
To: fromSequence + eventCount,
Events: streamEvents,
}, nil
}
func (r *Repository) Get(sourceId sourcing.EventSourceId, source sourcing.EventSource) error {
events, err := r.backend.ReadStream(EventStreamId(sourceId))
if err != nil {
return err
}
for _, e := range events {
source.Apply(e)
}
return nil
}
func (r *Repository) Add(source sourcing.EventSource) error {
Log.Debug("Adding changes for %v", source.Id())
change, err := r.getStreamChangeFromSource(source)
if err != nil {
return err
}
Log.Debug("Saving change with backend")
if err := r.backend.WriteStream(change); err != nil {
Log.Error("Error from backend: %v", err)
return err
}
Log.Debug("Succesfully wrote change to repository backend.")
Log.Debug("Starting dispatching change.")
r.dispatcher.Dispatch(change)
Log.Debug("Change added succesfully")
return nil
}