public IList <IPrepareLogRecord <TStreamId> > CreatePrepareLogRecords(string stream, int expectedVersion, IList <string> eventTypes, IList <Guid> eventIds, long transactionPosition)
{
if (eventIds.Count != eventTypes.Count)
{
throw new Exception("eventType and eventIds length mismatch!");
}
if (eventIds.Count == 0)
{
throw new Exception("eventIds is empty");
}
if (eventIds.Count == 1)
{
return(CreatePrepareLogRecord(stream, expectedVersion, eventTypes[0], eventIds[0], transactionPosition));
}
var numEvents = eventTypes.Count;
var logFormat = LogFormatHelper <TLogFormat, TStreamId> .LogFormat;
var prepares = new List <IPrepareLogRecord <TStreamId> >();
logFormat.StreamNameIndex.GetOrAddId(stream, out var streamId, out _, out _);
for (var i = 0; i < numEvents; i++)
{
PrepareFlags flags = PrepareFlags.Data | PrepareFlags.IsCommitted;
if (i == 0)
{
flags |= PrepareFlags.TransactionBegin;
}
if (i == numEvents - 1)
{
flags |= PrepareFlags.TransactionEnd;
}
prepares.Add(
PrepareLogRecord.Prepare(
logFormat.RecordFactory,
transactionPosition + RecordOffset * i,
Guid.NewGuid(),
eventIds[i],
transactionPosition,
i,
streamId,
expectedVersion + i,
flags,
eventTypes[i],
new byte[0],
new byte[0],
DateTime.Now
));
}
return(prepares);
}