public ChangeBatch GetChangeBatch(uint batchSize, SyncKnowledge destinationKnowledge, out ForgottenKnowledge forgottenKnowledge, out object changeDataRetriever)
{
// Increment the tick count
GetNextTickCount();
// Get local changes
List <ItemChange> changes = DetectChanges(destinationKnowledge, batchSize);
// Update the knowledge with an updated local tick count
SyncKnowledge.SetLocalTickCount(tickCount);
// Construct the ChangeBatch and return it
ChangeBatch changeBatch = new ChangeBatch(IdFormats, destinationKnowledge, ForgottenKnowledge);
changeBatch.BeginUnorderedGroup();
changeBatch.AddChanges(changes);
if (changes.Count < batchSize || changes.Count == 0)
{
changeBatch.SetLastBatch();
}
changeBatch.EndUnorderedGroup(SyncKnowledge, changeBatch.IsLastBatch);
// Return the forgotten knowledge
forgottenKnowledge = ForgottenKnowledge;
changeDataRetriever = this;
return(changeBatch);
}
public List <ItemChange> GetChanges(ChangeBatch sourceChanges)
{
// Increment the tick count
GetNextTickCount();
// Increase local knowledge tick count.
SyncKnowledge.SetLocalTickCount(tickCount);
// Create a collection to hold the changes we'll put into our batch
List <ItemChange> changes = new List <ItemChange>();
foreach (ItemChange ic in sourceChanges)
{
ItemMetadata item;
ItemChange change;
// Iterate through each item to get the corresponding version in the local store
if (metadataStore.TryGetItem(ic.ItemId, out item))
{
// Found the corresponding item in the local metadata
// Get the local creation version and change (update) version from the metadata
change = new ItemChange(IdFormats, ReplicaId, item.ItemId, item.IsTombstone ? ChangeKind.Deleted: ChangeKind.Update, item.CreationVersion, item.ChangeVersion);
}
else
{
// Remote item has no local counterpart
// This item is unknown to us
change = new ItemChange(IdFormats, ReplicaId, ic.ItemId, ChangeKind.UnknownItem, SyncVersion.UnknownVersion, SyncVersion.UnknownVersion);
}
// Add our change to the change list
changes.Add(change);
}
return(changes);
}
internal static void SetLocalTickCountRanges(SyncKnowledge knowledge, ulong newTick)
{
SyncKnowledge knowledge1 = knowledge.Clone();
knowledge.SetLocalTickCount(newTick);
knowledge.Combine(knowledge1);
}
public void SetLocalTickCount()
{
SyncKnowledge.SetLocalTickCount(tickCount);
}