public IEnumerable <Document> GetRevisions(DocumentsOperationContext context, string key, int start, int take)
{
var table = context.Transaction.InnerTransaction.OpenTable(DocsSchema, RevisionDocuments);
Slice prefixSlice;
using (DocumentKeyWorker.GetSliceFromKey(context, key, out prefixSlice))
{
// ReSharper disable once LoopCanBeConvertedToQuery
foreach (
var sr in table.SeekForwardFrom(DocsSchema.Indexes[KeyAndEtagSlice], prefixSlice, startsWith: true)
)
{
foreach (var tvr in sr.Results)
{
if (start > 0)
{
start--;
continue;
}
if (take-- <= 0)
{
yield break;
}
var document = TableValueToDocument(context, tvr);
yield return(document);
}
if (take <= 0)
{
yield break;
}
}
}
}
public bool PutFromDocument(DocumentsOperationContext context, CollectionName collectionName, string key, long newEtagBigEndian, BlittableJsonReaderObject document)
{
var enableVersioning = false;
BlittableJsonReaderObject metadata;
if (document.TryGet(Constants.Metadata.Key, out metadata))
{
bool disableVersioning;
if (metadata.TryGet(Constants.Versioning.RavenDisableVersioning, out disableVersioning))
{
DynamicJsonValue mutatedMetadata;
Debug.Assert(metadata.Modifications == null);
metadata.Modifications = mutatedMetadata = new DynamicJsonValue(metadata);
mutatedMetadata.Remove(Constants.Versioning.RavenDisableVersioning);
if (disableVersioning)
{
return(false);
}
}
if (metadata.TryGet(Constants.Versioning.RavenEnableVersioning, out enableVersioning))
{
DynamicJsonValue mutatedMetadata = metadata.Modifications;
if (mutatedMetadata == null)
{
metadata.Modifications = mutatedMetadata = new DynamicJsonValue(metadata);
}
mutatedMetadata.Remove(Constants.Versioning.RavenEnableVersioning);
}
}
var configuration = GetVersioningConfiguration(collectionName);
if (enableVersioning == false && configuration.Active == false)
{
return(false);
}
var table = context.Transaction.InnerTransaction.OpenTable(DocsSchema, RevisionDocuments);
Slice prefixSlice;
using (DocumentKeyWorker.GetSliceFromKey(context, key, out prefixSlice))
{
var revisionsCount = IncrementCountOfRevisions(context, prefixSlice, 1);
DeleteOldRevisions(context, table, prefixSlice, configuration.MaxRevisions, revisionsCount);
PutInternal(context, key, newEtagBigEndian, document, table);
}
return(true);
}
private void PutInternal(DocumentsOperationContext context, string key, long newEtagBigEndian, BlittableJsonReaderObject document, Table table)
{
byte *lowerKey;
int lowerSize;
byte *keyPtr;
int keySize;
DocumentKeyWorker.GetLowerKeySliceAndStorageKey(context, key, out lowerKey, out lowerSize, out keyPtr, out keySize);
byte recordSeperator = 30;
var tbv = new TableValueBuilder
{
{ lowerKey, lowerSize },
{&recordSeperator, sizeof(char) },
{ (byte *)&newEtagBigEndian, sizeof(long) },
{ keyPtr, keySize },
{ document.BasePointer, document.Size }
};
table.Insert(tbv);
}
