/// <summary>
/// Implements the updating of the <see cref="Rows"/> collection.
/// </summary>
private void Update()
{
_willUpdate = false;
long lastSequence = Database.GetLastSequenceNumber();
if (_rows != null && _lastSequence >= lastSequence)
{
return; // db hasn't changed since last query
}
if (_isUpdatingAtSequence > 0)
{
// Update already in progress; only schedule another one if db has changed since
if (_isUpdatingAtSequence < lastSequence)
{
_isUpdatingAtSequence = lastSequence;
_updateAgain = true;
return;
}
}
if (!_runningState)
{
Log.To.Query.D(TAG, "Update called, but running state == false. Ignoring.");
return;
}
_updateAgain = false;
_isUpdatingAtSequence = lastSequence;
_lastUpdatedAt = DateTime.Now;
UpdateQueryTokenSource = new CancellationTokenSource();
Log.To.TaskScheduling.V(TAG, "Scheduling query run...");
UpdateQueryTask = Task.Factory.StartNew <QueryEnumerator>(base.Run, UpdateQueryTokenSource.Token)
.ContinueWith(UpdateFinished, _eventContext.Scheduler);
}
public virtual bool IsStale()
{
return(sequenceNumber < database.GetLastSequenceNumber());
}
public bool IsStale()
{
return(GetLastSequenceIndexed() < database.GetLastSequenceNumber());
}
public bool IsStale()
{
return(SequenceNumber < _database.GetLastSequenceNumber());
}
