internal override void BeginReplicating()
{
// If we're still waiting to create the remote db, do nothing now. (This method will be
// re-invoked after that request finishes; see maybeCreateRemoteDB() above.)
if (_creatingTarget)
{
Log.To.Sync.D(TAG, "creatingTarget == true, doing nothing");
return;
}
_pendingSequences = new SortedDictionary <long, int>();
if (!Int64.TryParse(LastSequence, out _maxPendingSequence))
{
Log.To.Sync.W(TAG, "{0} is not a valid last sequence, using 0", LastSequence);
_maxPendingSequence = 0;
}
if (Filter != null)
{
_filter = LocalDatabase.GetFilter(Filter);
}
else
{
// If not filter function was provided, but DocIds were
// specified, then only push the documents listed in the
// DocIds property. It is assumed that if the users
// specified both a filter name and doc ids that their
// custom filter function will handle that. This is
// consistent with the iOS behavior.
if (DocIds != null && DocIds.Any())
{
_filter = (rev, filterParams) => DocIds.Contains(rev.Document.Id);
}
}
if (Filter != null && _filter == null)
{
Log.To.Sync.W(TAG, "{0}: No ReplicationFilter registered for filter '{1}'; ignoring", this, Filter);
}
// Process existing changes since the last push:
long lastSequenceLong = 0;
if (LastSequence != null)
{
lastSequenceLong = long.Parse(LastSequence);
}
if (ReplicationOptions.PurgePushed)
{
_purgeQueue = new Batcher <RevisionInternal>(new BatcherOptions <RevisionInternal> {
WorkExecutor = WorkExecutor,
Capacity = EphemeralPurgeBatchSize,
Delay = EphemeralPurgeDelay,
Processor = PurgeRevs,
TokenSource = CancellationTokenSource
});
}
// Now listen for future changes (in continuous mode):
// Note: This needs to happen before adding the observer
// or else there is a race condition.
// A document could be added between the call to
// ChangesSince and adding the observer, which would result
// in a document being skipped
if (Continuous)
{
_observing = true;
LocalDatabase.Changed += OnChanged;
}
var options = ChangesOptions.Default;
options.IncludeConflicts = true;
var changes = LocalDatabase.ChangesSinceStreaming(lastSequenceLong, options, _filter, FilterParams);
bool hasItems = changes.Any();
foreach (var change in changes)
{
Batcher.QueueObject(change);
if (Status == ReplicationStatus.Stopped)
{
Batcher.Clear();
return;
}
}
if (hasItems)
{
Batcher.Flush();
}
if (Continuous)
{
if (!hasItems)
{
Log.To.Sync.V(TAG, "No changes to push, switching to idle...");
FireTrigger(ReplicationTrigger.WaitingForChanges);
}
}
else
{
if (!hasItems)
{
Log.To.Sync.V(TAG, "No changes to push, firing StopGraceful...");
FireTrigger(ReplicationTrigger.StopGraceful);
}
}
}