| public ReadTree ( string treeName ) : Voron.Trees.Tree | ||
| treeName | string | |
| return | Voron.Trees.Tree | |
public Searcher(FullTextIndex index)
{
_index = index;
_tx = _index.StorageEnvironment.NewTransaction(TransactionFlags.Read);
_docs = _tx.ReadTree("Docs");
}
private static void SetCurrentTopologyInternal(Topology currentTopology, long index, Transaction tx)
{
if (currentTopology.TopologyId == Guid.Empty)
throw new InvalidOperationException("Cannot set topology with an empty TopologyId");
var metadata = tx.ReadTree(MetadataTreeName);
var current = metadata.Read("current-topology");
metadata.Add("previous-topology", current == null ? "{}" : current.Reader.ToStringValue());
metadata.Add("current-topology", JsonConvert.SerializeObject(currentTopology));
metadata.Add("current-topology-index", EndianBitConverter.Little.GetBytes(index));
}
public static Tree GetTree(this StorageEnvironmentState state, Transaction tx, string treeName)
{
if (String.IsNullOrEmpty(treeName))
throw new InvalidOperationException("Cannot fetch tree with empty name");
if (treeName.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase))
return state.Root;
if (treeName.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
return state.FreeSpaceRoot;
Tree tree = tx.ReadTree(treeName);
if (tree != null)
return tree;
throw new InvalidOperationException("No such tree: " + treeName);
}
public Tree GetTree(Transaction tx, string treeName)
{
if (String.IsNullOrEmpty(treeName))
throw new InvalidOperationException("Cannot fetch tree with empty name");
Tree tree = tx.ReadTree(treeName);
if (tree != null)
return tree;
if (treeName.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase))
return Root;
if (treeName.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
return FreeSpaceRoot;
if (tx.Flags == TransactionFlags.ReadWrite)
return tx.Environment.CreateTree(tx, treeName, Options.ShouldUseKeyPrefix(treeName));
throw new InvalidOperationException("No such tree: " + treeName);
}
public unsafe Tree CreateTree(Transaction tx, string name, bool keysPrefixing = false)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot create a new tree with a read only transaction");
Tree tree = tx.ReadTree(name);
if (tree != null)
return tree;
if (name.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase) ||
name.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
throw new InvalidOperationException("Cannot create a tree with reserved name: " + name);
Slice key = (Slice)name;
// we are in a write transaction, no need to handle locks
var header = (TreeRootHeader*)tx.State.Root.DirectRead(key);
if (header != null)
{
tree = Tree.Open(tx, header);
tree.Name = name;
tx.AddTree(name, tree);
return tree;
}
tree = Tree.Create(tx, keysPrefixing);
tree.Name = name;
var space = tx.State.Root.DirectAdd(key, sizeof(TreeRootHeader));
tree.State.CopyTo((TreeRootHeader*)space);
tree.State.IsModified = true;
tx.AddTree(name, tree);
if(IsDebugRecording)
DebugJournal.RecordWriteAction(DebugActionType.CreateTree, tx, Slice.Empty,name,Stream.Null);
return tree;
}
public unsafe void RenameTree(Transaction tx, string fromName, string toName)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot rename a new tree with a read only transaction");
if (toName.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase) ||
toName.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
throw new InvalidOperationException("Cannot create a tree with reserved name: " + toName);
if (tx.ReadTree(toName) != null)
throw new ArgumentException("Cannot rename a tree with the name of an existing tree: " + toName);
Tree fromTree = tx.ReadTree(fromName);
if (fromTree == null)
throw new ArgumentException("Tree " + fromName + " does not exists");
Slice key = (Slice)toName;
tx.State.Root.Delete((Slice)fromName);
var ptr = tx.State.Root.DirectAdd(key, sizeof(TreeRootHeader));
fromTree.State.CopyTo((TreeRootHeader*) ptr);
fromTree.Name = toName;
fromTree.State.IsModified = true;
tx.RemoveTree(fromName);
tx.RemoveTree(toName);
tx.AddTree(toName, fromTree);
if (IsDebugRecording)
DebugJournal.RecordWriteAction(DebugActionType.RenameTree, tx, (Slice)toName, fromName, Stream.Null);
}
public void DeleteTree(Transaction tx, string name)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot create a new newRootTree with a read only transaction");
Tree tree = tx.ReadTree(name);
if (tree == null)
return;
foreach (var page in tree.AllPages())
{
tx.FreePage(page);
}
tx.State.Root.Delete((Slice) name);
tx.RemoveTree(name);
}
private void ReplayWriteAction(WriteActivityEntry activityEntry, ref Transaction tx)
{
var tree = tx.ReadTree(activityEntry.TreeName);
switch (activityEntry.ActionType)
{
case DebugActionType.Add:
tree.Add(activityEntry.Key, activityEntry.ValueStream);
break;
case DebugActionType.Delete:
tree.Delete(activityEntry.Key);
break;
case DebugActionType.MultiAdd:
tree.MultiAdd(activityEntry.Key, new Slice(Encoding.UTF8.GetBytes(activityEntry.Value.ToString())));
break;
case DebugActionType.MultiDelete:
tree.MultiDelete(activityEntry.Key, new Slice(Encoding.UTF8.GetBytes(activityEntry.Value.ToString())));
break;
case DebugActionType.CreateTree:
_env.CreateTree(tx, activityEntry.TreeName);
break;
case DebugActionType.Increment:
var buffer = new byte[sizeof(long)];
activityEntry.ValueStream.Read(buffer, 0, buffer.Length);
var delta = EndianBitConverter.Little.ToInt64(buffer, 0);
tree.Increment(activityEntry.Key, delta);
break;
case DebugActionType.AddStruct:
tree.Add(activityEntry.Key, activityEntry.ValueStream);
break;
case DebugActionType.RenameTree:
_env.RenameTree(tx, activityEntry.TreeName, activityEntry.Key.ToString());
break;
default: //precaution against newly added action types
throw new InvalidOperationException("unsupported tree action type: " + activityEntry.ActionType);
}
}
public StorageReport GenerateReport(Transaction tx, bool computeExactSizes = false)
{
var numberOfAllocatedPages = Math.Max(_dataPager.NumberOfAllocatedPages, NextPageNumber - 1); // async apply to data file task
var numberOfFreePages = _freeSpaceHandling.AllPages(tx).Count;
var trees = new List<Tree>();
using (var rootIterator = tx.Root.Iterate())
{
if (rootIterator.Seek(Slice.BeforeAllKeys))
{
do
{
var tree = tx.ReadTree(rootIterator.CurrentKey.ToString());
trees.Add(tree);
}
while (rootIterator.MoveNext());
}
}
var generator = new StorageReportGenerator(tx);
return generator.Generate(new ReportInput
{
NumberOfAllocatedPages = numberOfAllocatedPages,
NumberOfFreePages = numberOfFreePages,
NextPageNumber = NextPageNumber,
Journals = Journal.Files.ToList(),
Trees = trees,
IsLightReport = !computeExactSizes
});
}
public unsafe Tree CreateTree(Transaction tx, string name, bool keysPrefixing = false)
{
Tree tree = tx.ReadTree(name);
if (tree != null)
return tree;
if (name.Equals(Constants.RootTreeName, StringComparison.InvariantCultureIgnoreCase))
return tx.Root;
if (name.Equals(Constants.FreeSpaceTreeName, StringComparison.InvariantCultureIgnoreCase))
return tx.FreeSpaceRoot;
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new InvalidOperationException("No such tree: " + name + " and cannot create trees in read transactions");
Slice key = name;
tree = Tree.Create(tx, keysPrefixing);
tree.Name = name;
var space = tx.Root.DirectAdd(key, sizeof(TreeRootHeader));
tree.State.CopyTo((TreeRootHeader*)space);
tree.State.IsModified = true;
tx.AddTree(name, tree);
if(IsDebugRecording)
DebugJournal.RecordWriteAction(DebugActionType.CreateTree, tx, Slice.Empty,name,Stream.Null);
return tree;
}
private static LogEntry GetLastLogEntryFromSnapshot(Transaction tx)
{
var metadata = tx.ReadTree(MetadataTreeName);
// maybe there is a snapshot?
var snapshotTerm = metadata.Read("snapshot-term");
var snapshotIndex = metadata.Read("snapshot-index");
if (snapshotIndex == null || snapshotTerm == null)
return new LogEntry();
return new LogEntry
{
Term = snapshotTerm.Reader.ReadLittleEndianInt64(),
Index = snapshotIndex.Reader.ReadLittleEndianInt64()
};
}
private static long GetLastEntryNumber(Tree logs, Transaction tx)
{
long lastEntry;
var lastKey = logs.LastKeyOrDefault();
if (lastKey != null)
{
lastEntry = lastKey.CreateReader().ReadBigEndianInt64();
}
else
{
var metadata = tx.ReadTree(MetadataTreeName);
// maybe there is a snapshot?
var snapshotIndex = metadata.Read("snapshot-index");
if (snapshotIndex != null)
lastEntry = snapshotIndex.Reader.ReadLittleEndianInt64();
else
lastEntry = 0;
}
return lastEntry;
}
public unsafe Tree CreateTree(Transaction tx, string name)
{
if (tx.Flags == (TransactionFlags.ReadWrite) == false)
throw new ArgumentException("Cannot create a new tree with a read only transaction");
Tree tree = tx.ReadTree(name);
if (tree != null)
return tree;
Slice key = name;
// we are in a write transaction, no need to handle locks
var header = (TreeRootHeader*)tx.State.Root.DirectRead(key);
if (header != null)
{
tree = Tree.Open(tx, _sliceComparer, header);
tree.Name = name;
tx.AddTree(name, tree);
return tree;
}
tree = Tree.Create(tx, _sliceComparer);
tree.Name = name;
var space = tx.State.Root.DirectAdd(key, sizeof(TreeRootHeader));
tree.State.CopyTo((TreeRootHeader*)space);
tree.State.IsModified = true;
tx.AddTree(name, tree);
if(IsDebugRecording)
DebugJournal.RecordAction(DebugActionType.CreateTree, Slice.Empty,name,Stream.Null);
return tree;
}
public static void RenderFreeSpace(Transaction tx)
{
RenderAndShow(tx, tx.ReadTree(tx.Environment.State.FreeSpaceRoot.Name).State.RootPageNumber, 1);
}
