private async Task <BatchIDGenerator> EnsureGenerator()
{
if (_idGenerator == null)
{
using (ITransaction tx = await _db.StartTransactionAsync()) {
Maybe <EventID> lastID = await _db
.UseTransaction(tx)
.GetCollection <RecordedEvent>(CollectionName)
.Max <EventID>("_id");
_idGenerator = BatchIDGenerator.Create(lastID.OrDefault());
}
}
return(_idGenerator);
}
internal MongoEventStore(IMongoFacade db, EventStoreSettings settings, BatchIDGenerator idGenerator) : this(db, settings)
{
_idGenerator = idGenerator;
}