public void Save(AdditionalEvents additionalEvents)
{
var stream = store.GetOrAdd(additionalEvents.AggregateId, _ => new Stream());
ArrayList eventList, newEventList;
do
{
eventList = stream.Events;
if (IsRaceHazard(additionalEvents, eventList))
{
throw new ConcurrencyConflictOccurred();
}
newEventList = eventList == null ? new ArrayList() : (ArrayList)eventList.Clone();
newEventList.AddRange(additionalEvents.Events);
} while (Interlocked.CompareExchange(
ref stream.Events, newEventList, eventList) != eventList);
}
private static bool IsRaceHazard(AdditionalEvents additionalEvents, ArrayList eventList) => (eventList == null ? 0 : eventList.Count) != additionalEvents.PrecedingEventCount;
