public void MultiAdd(Slice key, Slice value, ushort? version = null)
{
if (value == null) throw new ArgumentNullException("value");
int maxNodeSize = _tx.DataPager.MaxNodeSize;
if (value.Size > maxNodeSize)
throw new ArgumentException(
"Cannot add a value to child tree that is over " + maxNodeSize + " bytes in size", "value");
if (value.Size == 0)
throw new ArgumentException("Cannot add empty value to child tree");
State.IsModified = true;
Lazy<Cursor> lazy;
var page = FindPageFor(key, out lazy);
if ((page == null || page.LastMatch != 0))
{
MultiAddOnNewValue(_tx, key, value, version, maxNodeSize);
return;
}
page = _tx.ModifyPage(page.PageNumber, page);
var item = page.GetNode(page.LastSearchPosition);
// already was turned into a multi tree, not much to do here
if (item->Flags == NodeFlags.MultiValuePageRef)
{
var existingTree = OpenOrCreateMultiValueTree(_tx, key, item);
existingTree.DirectAdd(value, 0, version: version);
return;
}
byte* nestedPagePtr;
if (item->Flags == NodeFlags.PageRef)
{
var overFlowPage = _tx.ModifyPage(item->PageNumber, null);
nestedPagePtr = overFlowPage.Base + Constants.PageHeaderSize;
}
else
{
nestedPagePtr = NodeHeader.DirectAccess(_tx, item);
}
var nestedPage = new Page(nestedPagePtr, "multi tree", (ushort)NodeHeader.GetDataSize(_tx, item));
var existingItem = nestedPage.Search(value);
if (nestedPage.LastMatch != 0)
existingItem = null;// not an actual match, just greater than
ushort previousNodeRevision = existingItem != null ? existingItem->Version : (ushort)0;
CheckConcurrency(key, value, version, previousNodeRevision, TreeActionType.Add);
if (existingItem != null)
{
// maybe same value added twice?
var tmpKey = new Slice(item);
if (tmpKey.Compare(value) == 0)
return; // already there, turning into a no-op
nestedPage.RemoveNode(nestedPage.LastSearchPosition);
}
if (nestedPage.HasSpaceFor(_tx, value, 0))
{
// we are now working on top of the modified root page, we can just modify the memory directly
nestedPage.AddDataNode(nestedPage.LastSearchPosition, value, 0, previousNodeRevision);
return;
}
int pageSize = nestedPage.CalcSizeUsed() + Constants.PageHeaderSize;
var newRequiredSize = pageSize + nestedPage.GetRequiredSpace(value, 0);
if (newRequiredSize <= maxNodeSize)
{
// we can just expand the current value... no need to create a nested tree yet
var actualPageSize = (ushort)Math.Min(Utils.NearestPowerOfTwo(newRequiredSize), maxNodeSize);
ExpandMultiTreeNestedPageSize(_tx, key, value, nestedPagePtr, actualPageSize, item->DataSize);
return;
}
// we now have to convert this into a tree instance, instead of just a nested page
var tree = Create(_tx, TreeFlags.MultiValue);
for (int i = 0; i < nestedPage.NumberOfEntries; i++)
{
var existingValue = nestedPage.GetNodeKey(i);
tree.DirectAdd(existingValue, 0);
}
tree.DirectAdd(value, 0, version: version);
_tx.AddMultiValueTree(this, key, tree);
// we need to record that we switched to tree mode here, so the next call wouldn't also try to create the tree again
DirectAdd(key, sizeof (TreeRootHeader), NodeFlags.MultiValuePageRef);
}
public void MultiAdd(Slice key, Slice value, ushort?version = null)
{
if (value == null)
{
throw new ArgumentNullException("value");
}
int maxNodeSize = AbstractPager.NodeMaxSize;
if (value.Size > maxNodeSize)
{
throw new ArgumentException(
"Cannot add a value to child tree that is over " + maxNodeSize + " bytes in size", "value");
}
if (value.Size == 0)
{
throw new ArgumentException("Cannot add empty value to child tree");
}
State.IsModified = true;
Lazy <Cursor> lazy;
NodeHeader * node;
var page = FindPageFor(key, out node, out lazy);
if ((page == null || page.LastMatch != 0))
{
MultiAddOnNewValue(_tx, key, value, version, maxNodeSize);
return;
}
page = _tx.ModifyPage(page.PageNumber, page);
var item = page.GetNode(page.LastSearchPosition);
// already was turned into a multi tree, not much to do here
if (item->Flags == NodeFlags.MultiValuePageRef)
{
var existingTree = OpenMultiValueTree(_tx, key, item);
existingTree.DirectAdd(value, 0, version: version);
return;
}
byte *nestedPagePtr;
if (item->Flags == NodeFlags.PageRef)
{
var overFlowPage = _tx.ModifyPage(item->PageNumber, null);
nestedPagePtr = overFlowPage.Base + Constants.PageHeaderSize;
}
else
{
nestedPagePtr = NodeHeader.DirectAccess(_tx, item);
}
var nestedPage = new Page(nestedPagePtr, "multi tree", (ushort)NodeHeader.GetDataSize(_tx, item));
var existingItem = nestedPage.Search(value);
if (nestedPage.LastMatch != 0)
{
existingItem = null; // not an actual match, just greater than
}
ushort previousNodeRevision = existingItem != null ? existingItem->Version : (ushort)0;
CheckConcurrency(key, value, version, previousNodeRevision, TreeActionType.Add);
if (existingItem != null)
{
// maybe same value added twice?
var tmpKey = page.GetNodeKey(item);
if (tmpKey.Compare(value) == 0)
{
return; // already there, turning into a no-op
}
nestedPage.RemoveNode(nestedPage.LastSearchPosition);
}
var valueToInsert = nestedPage.PrepareKeyToInsert(value, nestedPage.LastSearchPosition);
if (nestedPage.HasSpaceFor(_tx, valueToInsert, 0))
{
// we are now working on top of the modified root page, we can just modify the memory directly
nestedPage.AddDataNode(nestedPage.LastSearchPosition, valueToInsert, 0, previousNodeRevision);
return;
}
int pageSize = nestedPage.CalcSizeUsed() + Constants.PageHeaderSize;
var newRequiredSize = pageSize + nestedPage.GetRequiredSpace(valueToInsert, 0);
if (newRequiredSize <= maxNodeSize)
{
// we can just expand the current value... no need to create a nested tree yet
var actualPageSize = (ushort)Math.Min(Utils.NearestPowerOfTwo(newRequiredSize), maxNodeSize);
var currentDataSize = NodeHeader.GetDataSize(_tx, item);
ExpandMultiTreeNestedPageSize(_tx, key, value, nestedPagePtr, actualPageSize, currentDataSize);
return;
}
// we now have to convert this into a tree instance, instead of just a nested page
var tree = Create(_tx, KeysPrefixing, TreeFlags.MultiValue);
for (int i = 0; i < nestedPage.NumberOfEntries; i++)
{
var existingValue = nestedPage.GetNodeKey(i);
tree.DirectAdd(existingValue, 0);
}
tree.DirectAdd(value, 0, version: version);
_tx.AddMultiValueTree(this, key, tree);
// we need to record that we switched to tree mode here, so the next call wouldn't also try to create the tree again
DirectAdd(key, sizeof(TreeRootHeader), NodeFlags.MultiValuePageRef);
}
