public void CompareColumnNames_EqualColumnNames()
{
var ts = Timestamp.Now;
var eventId = Guid.NewGuid();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, eventId), ColumnName(ts, eventId)).Should().Be(0);
}
public void CompareColumnNames_DifferentTimestamps()
{
var ts = Timestamp.Now;
var eventId = Guid.NewGuid();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, eventId), ColumnName(ts.AddTicks(1), eventId)).Should().BeNegative();
}
public EventsQueryResult <TaskMetaUpdatedEvent, string> GetEvents([CanBeNull] string fromOffsetExclusive, [NotNull] string toOffsetInclusive, int estimatedCount)
{
if (estimatedCount <= 0)
{
throw new InvalidOperationException("estimatedCount <= 0");
}
if (string.IsNullOrEmpty(toOffsetInclusive))
{
throw new InvalidOperationException("toOffsetInclusive is not set");
}
var firstEventTicks = eventLogRepository.GetFirstEventTicks();
if (firstEventTicks == 0)
{
return(new EventsQueryResult <TaskMetaUpdatedEvent, string>(new List <EventWithOffset <TaskMetaUpdatedEvent, string> >(), lastOffset: null, noMoreEventsInSource: true));
}
var exclusiveStartColumnName = GetExclusiveStartColumnName(fromOffsetExclusive, firstEventTicks);
if (EventPointerFormatter.CompareColumnNames(exclusiveStartColumnName, toOffsetInclusive) >= 0)
{
return(new EventsQueryResult <TaskMetaUpdatedEvent, string>(new List <EventWithOffset <TaskMetaUpdatedEvent, string> >(), lastOffset: null, noMoreEventsInSource: true));
}
if (estimatedCount == int.MaxValue)
{
estimatedCount--;
}
var eventsToFetch = estimatedCount;
var events = new List <EventWithOffset <TaskMetaUpdatedEvent, string> >();
var partitionKey = EventPointerFormatter.GetPartitionKey(EventPointerFormatter.GetTimestamp(exclusiveStartColumnName).Ticks);
while (true)
{
var eventsBatch = eventLogRepository.GetEvents(partitionKey, exclusiveStartColumnName, toOffsetInclusive, eventsToFetch, out var currentPartitionIsExhausted);
events.AddRange(eventsBatch.Select(x => new EventWithOffset <TaskMetaUpdatedEvent, string>(x.Event, x.Offset)));
if (!currentPartitionIsExhausted)
{
return(new EventsQueryResult <TaskMetaUpdatedEvent, string>(events, lastOffset: events.Last().Offset, noMoreEventsInSource: false));
}
var nextPartitionStartTicks = (EventPointerFormatter.ParsePartitionKey(partitionKey) + 1) * EventPointerFormatter.PartitionDurationTicks;
if (nextPartitionStartTicks > EventPointerFormatter.GetTimestamp(toOffsetInclusive).Ticks)
{
return(new EventsQueryResult <TaskMetaUpdatedEvent, string>(events, lastOffset: toOffsetInclusive, noMoreEventsInSource: true));
}
eventsToFetch = estimatedCount - events.Count;
partitionKey = EventPointerFormatter.GetPartitionKey(nextPartitionStartTicks);
exclusiveStartColumnName = EventPointerFormatter.GetMaxColumnNameForTicks(nextPartitionStartTicks - 1);
}
}
public int Compare([CanBeNull] string x, [CanBeNull] string y)
{
if (x == null && y == null)
{
return(0);
}
if (x == null)
{
return(-1);
}
if (y == null)
{
return(1);
}
return(EventPointerFormatter.CompareColumnNames(x, y));
}
public void CompareColumnNames_EqualTimestamps()
{
var ts = Timestamp.Now;
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.NewGuid())).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("a0000000-0000-0000-0000-000000000000"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("000000a0-0000-0000-0000-000000000000"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("0000000a-0000-0000-0000-000000000000"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("00000000-0000-0000-0000-00000000000a"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("f0000000-0000-0000-0000-000000000000"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, minGuid), ColumnName(ts, Guid.Parse("00000000-0000-0000-0000-00000000000f"))).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.NewGuid()), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("a0000000-0000-0000-0000-000000000000")), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("000000a0-0000-0000-0000-000000000000")), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("0000000a-0000-0000-0000-000000000000")), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("00000000-0000-0000-0000-00000000000a")), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("f0000000-0000-0000-0000-000000000000")), ColumnName(ts, maxGuid)).Should().BeNegative();
EventPointerFormatter.CompareColumnNames(ColumnName(ts, Guid.Parse("00000000-0000-0000-0000-00000000000f")), ColumnName(ts, maxGuid)).Should().BeNegative();
}
