public void EmptyCacheSouldntMoveAndShouldReturnNull()
{
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
Exception ex;
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, null);
Assert.IsFalse(cursor.MoveNext());
Assert.IsNull(cursor.GetCurrent(out ex));
Assert.IsNull(ex);
cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, new TimeSequenceToken(DateTime.Today));
Assert.IsFalse(cursor.MoveNext());
Assert.IsNull(cursor.GetCurrent(out ex));
Assert.IsNull(ex);
}
public void ReplayOnlyRelevantMessages()
{
var timeToPurge = TimeSpan.FromSeconds(10);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
// add batches for this stream:
cache.AddToCache(_someBatches.Take(5).ToList());
// add batches for another stream:
cache.AddToCache(_otherBatches.Take(5).ToList());
// add batches for this stream:
cache.AddToCache(_someBatches.Skip(5).ToList());
// add batches for another stream:
cache.AddToCache(_otherBatches.Skip(5).ToList());
var firstBatch = _someBatches.First() as PipeQueueAdapterBatchContainer;
var token = firstBatch.RealToken;
// We only want to read messages for stream with this GUID in this namespace:
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, new TimeSequenceToken(DateTime.Today));
// check that we read only the relevant batches for this stream
foreach (var b in _someBatches)
{
// Move
Assert.IsTrue(cursor.MoveNext());
// Read the same batch
Exception ex;
Assert.IsTrue(b == cursor.GetCurrent(out ex));
Assert.IsTrue(ex == null);
}
// Can't move any more
Assert.IsFalse(cursor.MoveNext());
}
public void ReplayFromLastMessageWhenNoTokenGiven()
{
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches);
// Give a null token
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, null);
Exception ex;
// Should be able to get the last message
Assert.IsTrue(cursor.MoveNext());
Assert.IsTrue(cursor.GetCurrent(out ex) == _someBatches.Last());
Assert.IsNull(ex);
// That should have been the last message, so there should be no more to read after it
Assert.IsFalse(cursor.MoveNext());
// Still on the same message:
Assert.IsTrue(cursor.GetCurrent(out ex) == _someBatches.Last());
Assert.IsNull(ex);
}
public void ReplayFromStart()
{
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches);
// start time to read is the time of the first batch
var firstBatch = _someBatches.First() as PipeQueueAdapterBatchContainer;
var token = firstBatch.RealToken;
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, token);
foreach (var b in _someBatches)
{
// Move
Assert.IsTrue(cursor.MoveNext());
// Read the same batch
Exception ex;
Assert.IsTrue(b == cursor.GetCurrent(out ex));
Assert.IsTrue(ex == null);
}
// Can't move any more
Assert.IsFalse(cursor.MoveNext());
}
public void ReadAsDifferentStreamWithNoTokenShouldReturnNoMessages2()
{
// 2 secs to purge
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches);
var cursor = cache.GetCacheCursor(_anotherStreamGuid, _streamNamespace, null);
// Can't move
Assert.IsFalse(cursor.MoveNext());
}
public void ReadAsDifferentStreamShouldReturnNoMessages()
{
// 2 secs to purge
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches);
// start time to read is the time of the first batch
var firstBatch = _someBatches.First() as PipeQueueAdapterBatchContainer;
var token = firstBatch.RealToken;
var cursor = cache.GetCacheCursor(_anotherStreamGuid, _streamNamespace, token);
// Can't move
Assert.IsFalse(cursor.MoveNext());
}
public void NoMessagesWhenTokenRequestedIsTooNew()
{
var timeToPurge = TimeSpan.FromSeconds(5);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches);
// get last token:
var lastToken = (_someBatches.Last() as PipeQueueAdapterBatchContainer).RealToken;
var newerToken = new TimeSequenceToken(lastToken.Timestamp.AddMilliseconds(1));
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, newerToken);
Assert.IsFalse(cursor.MoveNext());
}
public void NewCursorShouldBeForwardedWhenMessagesArePurged()
{
var timeToPurge = TimeSpan.FromSeconds(7);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
var firstBatches = _someBatches.Take(5);
cache.AddToCache(firstBatches.ToList());
// get a cursor on the first message:
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, new TimeSequenceToken(DateTime.Today));
var moreBatches = _someBatches.Skip(5).ToList();
// trigger purge by adding again, the previous batches are 10, 9, ..., 6 seconds old so the earliest 3 will be purged given 7 seconds to purge
var timeNow = DateTime.UtcNow;
cache.AddToCache(moreBatches);
var purged = firstBatches.Count(x => (timeNow - (x.SequenceToken as TimeSequenceToken).Timestamp) > timeToPurge);
var countRemains = firstBatches.Count() - purged;
Assert.IsTrue(cache.Size == countRemains + moreBatches.Count);
// cursor now should be forwarded and should read batches at indices: 3, 4, .. count-1
Exception ex;
foreach (var b in _someBatches.Skip(purged))
{
Assert.IsTrue(cursor.MoveNext());
var current = cursor.GetCurrent(out ex);
Assert.IsTrue(b == current);
Assert.IsNull(ex);
}
// no more
Assert.IsFalse(cursor.MoveNext());
}
public void LaggingCursorShouldBeForwardedWhenAllMessagesArePurged()
{
var timeToPurge = TimeSpan.FromSeconds(1);
var cache = new QueueCache(QueueId.GetQueueId(0), timeToPurge, _mockLogger.Object);
cache.AddToCache(_someBatches.Take(5).ToList());
// get a cursor on the first message:
var cursor = cache.GetCacheCursor(_streamGuid, _streamNamespace, new TimeSequenceToken(DateTime.Today));
// Set it on first message:
cursor.MoveNext();
var moreBatches = _someBatches.Skip(5).ToList();
// trigger purge by adding again, all previous messages should be purged now
cache.AddToCache(moreBatches);
// Only new messages should exist
Assert.IsTrue(cache.Size == moreBatches.Count);
// cursor now should be forwarded and should read batches at indices: 3, 4, .. count-1
Exception ex;
foreach (var b in moreBatches)
{
Assert.IsTrue(cursor.MoveNext());
var current = cursor.GetCurrent(out ex);
Assert.IsTrue(b == current);
Assert.IsNull(ex);
}
// no more
Assert.IsFalse(cursor.MoveNext());
}