private EventLinkPair[] ResolveLinkToEvents(EventRecord[] records)
{
var resolved = new EventLinkPair[records.Length];
for (int i = 0; i < records.Length; i++)
{
EventRecord eventRecord = records[i];
EventRecord resolvedRecord = _readIndex.ResolveLinkToEvent(eventRecord);
resolved[i] = resolvedRecord != null
? new EventLinkPair(resolvedRecord, eventRecord)
: new EventLinkPair(eventRecord, null);
}
return(resolved);
}
void IHandle <ClientMessage.ReadStreamEventsForward> .Handle(ClientMessage.ReadStreamEventsForward message)
{
var lastCommitPosition = _readIndex.LastCommitPosition;
EventRecord[] records;
var result = _readIndex.ReadStreamEventsForward(message.EventStreamId, message.FromEventNumber, message.MaxCount, out records);
var nextEventNumber = result == RangeReadResult.Success && records.Length > 0
? records[records.Length - 1].EventNumber + 1
: -1;
if (result == RangeReadResult.Success && records.Length > 1)
{
for (var index = 1; index < records.Length; index++)
{
if (records[index].EventNumber != records[index - 1].EventNumber + 1)
{
throw new Exception(string.Format(
"Invalid order of events has been detected in read index for the event stream '{0}'. "
+ "The event {1} at position {2} goes after the event {3} at position {4}",
message.EventStreamId,
records[index].EventNumber,
records[index].LogPosition,
records[index - 1].EventNumber,
records[index - 1].LogPosition));
}
}
}
EventLinkPair[] resolvedPairs;
if (result == RangeReadResult.Success && message.ResolveLinks)
{
resolvedPairs = ResolveLinkToEvents(records);
}
else
{
resolvedPairs = new EventLinkPair[records.Length];
for (int i = 0; i < records.Length; ++i)
{
resolvedPairs[i] = new EventLinkPair(records[i], null);
}
}
message.Envelope.ReplyWith(
new ClientMessage.ReadStreamEventsForwardCompleted(message.CorrelationId,
message.EventStreamId,
resolvedPairs,
result,
nextEventNumber,
records.Length == 0 ? lastCommitPosition : (long?)null));
}
private EventLinkPair[] ResolveLinkToEvents(EventRecord[] records, bool resolveLinks)
{
var resolved = new EventLinkPair[records.Length];
if (resolveLinks)
{
for (int i = 0; i < records.Length; i++)
{
EventRecord eventRecord = records[i];
EventRecord resolvedRecord = ResolveLinkToEvent(eventRecord);
resolved[i] = resolvedRecord != null
? new EventLinkPair(resolvedRecord, eventRecord)
: new EventLinkPair(eventRecord, null);
}
}
else
{
for (int i = 0; i < records.Length; ++i)
{
resolved[i] = new EventLinkPair(records[i], null);
}
}
return(resolved);
}
public ReadStreamEventsForwardCompleted(string eventStreamId, EventLinkPair[] events, int result, int nextEventNumber, int lastEventNumber, bool isEndOfStream, long? lastCommitPosition)
{
EventStreamId = eventStreamId;
Events = events;
Result = result;
NextEventNumber = nextEventNumber;
LastEventNumber = lastEventNumber;
IsEndOfStream = isEndOfStream;
LastCommitPosition = lastCommitPosition;
}
public ReadAllEventsForwardCompleted(long commitPosition, long preparePosition, EventLinkPair[] events, long nextCommitPosition, long nextPreparePosition)
{
CommitPosition = commitPosition;
PreparePosition = preparePosition;
Events = events;
NextCommitPosition = nextCommitPosition;
NextPreparePosition = nextPreparePosition;
}
