public (List <string> ChangeVectors, NonPersistentDocumentFlags NonPersistentFlags) DeleteConflictsFor(
DocumentsOperationContext context, Slice lowerId, BlittableJsonReaderObject document)
{
if (ConflictsCount == 0)
{
return(null, NonPersistentDocumentFlags.None);
}
var changeVectors = new List <string>();
var nonPersistentFlags = NonPersistentDocumentFlags.None;
string deleteAttachmentChangeVector = null;
using (GetConflictsIdPrefix(context, lowerId, out Slice prefixSlice))
{
var conflictsTable = context.Transaction.InnerTransaction.OpenTable(ConflictsSchema, ConflictsSlice);
conflictsTable.DeleteForwardFrom(ConflictsSchema.Indexes[IdAndChangeVectorSlice], prefixSlice, true, long.MaxValue, conflictDocument =>
{
var etag = TableValueToEtag((int)ConflictsTable.Etag, ref conflictDocument.Reader);
_documentsStorage.EnsureLastEtagIsPersisted(context, etag);
var conflictChangeVector = TableValueToChangeVector(context, (int)ConflictsTable.ChangeVector, ref conflictDocument.Reader);
changeVectors.Add(conflictChangeVector);
var flags = TableValueToFlags((int)ConflictsTable.Flags, ref conflictDocument.Reader);
if ((flags & DocumentFlags.HasAttachments) != DocumentFlags.HasAttachments)
{
return;
}
if (string.IsNullOrEmpty(deleteAttachmentChangeVector))
{
var newEtag = _documentsStorage.GenerateNextEtag();
deleteAttachmentChangeVector = _documentsStorage.GetNewChangeVector(context, newEtag);
context.LastDatabaseChangeVector = conflictChangeVector;
}
nonPersistentFlags |= DeleteAttachmentConflicts(context, lowerId, document, conflictDocument, deleteAttachmentChangeVector);
});
}
// once this value has been set, we can't set it to false
// an older transaction may be running and seeing it is false it
// will not detect a conflict. It is an optimization only that
// we have to do, so we'll handle it.
// Only register the event if we actually deleted any conflicts
var listCount = changeVectors.Count;
if (listCount > 0)
{
var tx = context.Transaction.InnerTransaction.LowLevelTransaction;
tx.AfterCommitWhenNewReadTransactionsPrevented += () =>
{
Interlocked.Add(ref ConflictsCount, -listCount);
};
}
return(changeVectors, nonPersistentFlags);
}
public (List <string> ChangeVectors, NonPersistentDocumentFlags NonPersistentFlags) DeleteConflictsFor(
DocumentsOperationContext context, Slice lowerId, BlittableJsonReaderObject document)
{
if (ConflictsCount == 0)
{
return(null, NonPersistentDocumentFlags.None);
}
var changeVectors = new List <string>();
var nonPersistentFlags = NonPersistentDocumentFlags.None;
string deleteAttachmentChangeVector = null;
using (GetConflictsIdPrefix(context, lowerId, out Slice prefixSlice))
{
var conflictsTable = context.Transaction.InnerTransaction.OpenTable(ConflictsSchema, ConflictsSlice);
conflictsTable.DeleteForwardFrom(ConflictsSchema.Indexes[IdAndChangeVectorSlice], prefixSlice, true, long.MaxValue, conflictDocument =>
{
var conflicted = TableValueToConflictDocument(context, ref conflictDocument.Reader);
var collection = _documentsStorage.ExtractCollectionName(context, conflicted.Collection);
if (conflicted.Doc != null)
{
_documentsStorage.RevisionsStorage.Put(
context, conflicted.Id, conflicted.Doc, conflicted.Flags | DocumentFlags.Conflicted, nonPersistentFlags, conflicted.ChangeVector,
conflicted.LastModified.Ticks,
collectionName: collection, configuration: RevisionsStorage.ConflictConfiguration.Default);
}
else if (conflicted.Flags.Contain(DocumentFlags.FromReplication) == false)
{
using (Slice.External(context.Allocator, conflicted.LowerId, out var key))
{
var lastModifiedTicks = _documentDatabase.Time.GetUtcNow().Ticks;
_documentsStorage.RevisionsStorage.DeleteRevision(context, key, conflicted.Collection, conflicted.ChangeVector, lastModifiedTicks);
}
}
_documentsStorage.EnsureLastEtagIsPersisted(context, conflicted.Etag);
changeVectors.Add(conflicted.ChangeVector);
if (conflicted.Flags.Contain(DocumentFlags.HasAttachments) == false)
{
return;
}
if (string.IsNullOrEmpty(deleteAttachmentChangeVector))
{
var newEtag = _documentsStorage.GenerateNextEtag();
deleteAttachmentChangeVector = _documentsStorage.GetNewChangeVector(context, newEtag);
context.LastDatabaseChangeVector = conflicted.ChangeVector;
}
nonPersistentFlags |= DeleteAttachmentConflicts(context, lowerId, document, conflictDocument, deleteAttachmentChangeVector);
});
}
// once this value has been set, we can't set it to false
// an older transaction may be running and seeing it is false it
// will not detect a conflict. It is an optimization only that
// we have to do, so we'll handle it.
// Only register the event if we actually deleted any conflicts
var listCount = changeVectors.Count;
if (listCount > 0)
{
var tx = context.Transaction.InnerTransaction.LowLevelTransaction;
tx.AfterCommitWhenNewReadTransactionsPrevented += () =>
{
Interlocked.Add(ref ConflictsCount, -listCount);
};
}
return(changeVectors, nonPersistentFlags | NonPersistentDocumentFlags.Resolved);
}
