private void PackSlotFillers(BTreeAlgorithm parent, System.IO.BinaryWriter writer,
object simpleKey, ref int keySizeOnDisk, ref byte[] keyOfEmptySlots)
{
// write filler space same size as VersionNumber
CollectionOnDisk.WritePersistentData(parent, 0L, writer);
// write filler space same size as Key
if (keySizeOnDisk > 0 || simpleKey == null)
{
if (keySizeOnDisk == 0)
{
keySizeOnDisk = 20;
keySizeOnDisk += (sizeof(long) * 2);
}
if (keyOfEmptySlots == null)
{
keyOfEmptySlots = new byte[keySizeOnDisk];
}
CollectionOnDisk.WritePersistentData(parent, keyOfEmptySlots, writer, ItemType.Key);
}
else
{
CollectionOnDisk.WritePersistentData(parent, simpleKey, writer, ItemType.Key);
}
// write filler space same size as Value's Address on disk
//CollectionOnDisk.WritePersistentData(parent, -1L, writer);
}
//** todo: 1/7/09: Copy On Write(COW) each Register block to a backup file that
//** gets overwritten over and over as only last activity detail data is logged/rolled back
//** NOTE: older activities are deemed successful if there is a newer activity(ie - the last activity)
//** idea:
// 1. track new Add/Growth segments, don't track Save on said segments as,
//** they can be stashed away without harm as only added on transaction that will be rolled
//** back if failed/program crash
// 2. track updated segments not in Add/Growth to allow rollback of said segments.
// 3. last action entry will be rolled back on restart...
protected internal override void RegisterAdd(CollectionOnDisk collection, long blockAddress, int blockSize)
{
//** all transaction collections reside in TransactionFile which will be rolled back and
//** truncated during restart after program crash...
Transaction.RegisterAdd(_addStore, _fileGrowthStore, _recycledCollectionStore, collection, blockAddress,
blockSize, true);
}
private void AllocateOnNextSegment(CollectionOnDisk parent, HeaderData hd, Sop.DataBlock block)
{
long g;
long segmentSize = parent.Grow(out g);
if (segmentSize > 0)
{
Transaction.ITransactionLogger trans = parent.Transaction;
if (trans != null)
{
((Transaction.TransactionBase)trans).RegisterFileGrowth(parent, g, segmentSize);
}
}
else
{
string s = string.Format("File '{0}' failed to grow.", parent.File.Filename);
//_logger.LogLine(s);
throw new InvalidOperationException(s);
}
hd.OnDiskLeftoverSegmentSize = (int)(hd.EndAllocatableAddress - hd.NextAllocatableAddress);
hd.StartAllocatableAddress = g;
hd.EndAllocatableAddress = hd.StartAllocatableAddress + segmentSize;
hd.NextAllocatableAddress = hd.StartAllocatableAddress;
block.DataAddress = hd.NextAllocatableAddress;
hd.NextAllocatableAddress += block.Length;
hd.DiskBuffer.IsDirty = true;
hd.IsModifiedInTransaction = true;
}
protected internal override void RegisterFileGrowth(CollectionOnDisk collection, long segmentAddress,
long segmentSize)
{
//** all transaction collections reside in TransactionFile which will be rolled back and
//** truncated during restart after program crash...
Transaction.RegisterFileGrowth(_fileGrowthStore, collection, segmentAddress, segmentSize, false);
}
/// <summary>
/// RegisterAdd will be called whenever a "new" block is allocated.
/// Don't save block at this point as changes not saved yet.
/// </summary>
/// <param name="collection"></param>
/// <param name="blockAddress"></param>
/// <param name="blockSize"></param>
protected internal override void RegisterAdd(CollectionOnDisk collection, long blockAddress, int blockSize)
{
if (IsTransactionStore(collection))
{
((TransactionBase)collection.ParentTransactionLogger).RegisterAdd(collection, blockAddress, blockSize);
return;
}
if (LogCollection == null)
{
return;
}
RecordKey key = CreateKey(collection, blockAddress);
//** Check if Block is in Growth Segments
if (RegionLogic.IsSegmentInStore(_fileGrowthStore, key, blockSize) ||
RegionLogic.IsSegmentInStore(_recycledSegmentsStore, key, blockSize))
{
if (_inCommit == 0)
{
TrackModification(collection.GetTopParent());
}
return;
}
RegisterAdd(_addBlocksStore, _fileGrowthStore, _recycledSegmentsStore, collection, blockAddress,
blockSize, false);
if (_inCommit == 0)
{
TrackModification(collection.GetTopParent());
}
}
private void RegisterRemovedBlock(CollectionOnDisk container, long blockAddress, int blockSize)
{
// register removed block
if (container.Transaction != null)
{
((Transaction.TransactionBase)container.Transaction).Register(
Sop.Transaction.ActionType.Remove, (CollectionOnDisk)container, blockAddress, blockSize);
}
}
private void PackSlotItem(BTreeAlgorithm parent, System.IO.BinaryWriter writer,
BTreeItemOnDisk slot, ref int keySizeOnDisk, bool?isKeySimpleType)
{
if (slot != null)
{
IO.OnDiskBinaryWriter _writer = (IO.OnDiskBinaryWriter)writer;
long streamPos = _writer.LogicalPosition;
if (slot.Value.IsDirty)
{
slot.VersionNumber++;
}
CollectionOnDisk.WritePersistentData(parent, slot.VersionNumber, writer);
CollectionOnDisk.WritePersistentData(parent, slot.Key, writer, ItemType.Key);
if (parent.IsDataInKeySegment)
{
if (parent.IsDataLongInt)
{
writer.Write((long)slot.Value.Data);
}
else
{
if (parent.PersistenceType == PersistenceType.Unknown)
{
parent.PersistenceType =
CollectionOnDisk.GetPersistenceType(parent, slot.Value.Data, ItemType.Value);
parent.IsDirty = true;
}
//** write the value and keep track of its data size and location in the disk buffer.
//slot.ValueBlockIndex = DiskBuffer.GetIndexOf(((OnDiskBinaryWriter)writer).DataBlock);
//slot.ValueIndexInBlock = ((OnDiskBinaryWriter) writer).DataBlockPosition;
long startPos = _writer.LogicalPosition;
//parent.PersistenceType
CollectionOnDisk.WritePersistentData(parent, slot.Value.Data, writer, ItemType.Value);
slot.HintSizeOnDisk = (int)(_writer.LogicalPosition - startPos);
//**
}
slot.Value.IsDirty = false;
}
else
{
if (slot.Value.diskBuffer == null)
{
slot.Value.DiskBuffer = parent.CreateBlock(); //new Sop.DataBlock(parent.DataBlockSize);
}
writer.Write(parent.GetId(slot.Value.DiskBuffer));
}
if (keySizeOnDisk == 0)
{
int keyDataSize = (int)(_writer.LogicalPosition - streamPos);
keySizeOnDisk = keyDataSize;
parent.HintKeySizeOnDisk = keyDataSize;
}
}
}
protected internal override void RegisterRecycleCollection(CollectionOnDisk collection,
long blockAddress,
int blockSize)
{
RecordKey key = CreateKey(collection, blockAddress);
if (!_recycledCollectionStore.ContainsKey(key))
{
RegisterFileGrowth(_recycledCollectionStore, collection, blockAddress, blockSize, true);
}
}
internal static void RegisterAdd(
Collections.Generic.ISortedDictionary <RecordKey, long> addStore,
Collections.Generic.ISortedDictionary <RecordKey, long> fileGrowthStore,
Collections.Generic.ISortedDictionary <RecordKey, long> recycledCollectionStore,
CollectionOnDisk collection,
long blockAddress, int blockSize, bool checkIfInGrowthSegments)
{
RecordKey key = CreateKey(collection, blockAddress);
RegisterAdd(addStore, fileGrowthStore, recycledCollectionStore, key, blockSize,
checkIfInGrowthSegments);
}
override internal protected void TrackModification(CollectionOnDisk collection, bool untrack = false)
{
CollectionOnDisk p = collection; // Collection.GetTopParent();
RecordKey key = CreateKey(p);
if (!untrack)
{
ModifiedCollections[key] = p;
return;
}
ModifiedCollections.Remove(key);
}
private bool IsInUpdatedBlocks(CollectionOnDisk collection, long blockAddress, int blockSize)
{
BackupDataLogKey logKey = new BackupDataLogKey();
logKey.SourceFilename = collection.File.Filename;
logKey.SourceDataAddress = blockAddress;
IEnumerable <KeyValuePair <BackupDataLogKey, BackupDataLogValue> > intersectingLogs;
long mergedBlockStartAddress, mergedBlockSize;
return(GetIntersectingLogs(logKey, blockSize, out intersectingLogs, out mergedBlockStartAddress,
out mergedBlockSize) &&
intersectingLogs == null);
}
/// <summary>
/// Register file growth
/// </summary>
/// <param name="collection"></param>
/// <param name="segmentAddress"></param>
/// <param name="segmentSize"></param>
protected internal override void RegisterFileGrowth(CollectionOnDisk collection, long segmentAddress,
long segmentSize)
{
if (IsTransactionStore(collection))
{
((TransactionBase)collection.ParentTransactionLogger).RegisterFileGrowth(collection, segmentAddress,
segmentSize);
return;
}
if (LogCollection != null)
{
RegisterFileGrowth(_fileGrowthStore, collection, segmentAddress, segmentSize, false);
}
}
/// <summary>
/// Pack this Item for serialization to disk
/// </summary>
/// <param name="parent"></param>
/// <param name="writer"></param>
public virtual void Pack(IInternalPersistent parent, System.IO.BinaryWriter writer)
{
bool isReference = Value.DiskBuffer.DataAddress > -1;
writer.Write(isReference);
if (isReference)
{
writer.Write(Value.DiskBuffer.DataAddress);
}
else
{
CollectionOnDisk.WritePersistentData(parent, Value, writer);
}
}
/// <summary>
/// Unpack or read the contents of this object from a Binary Reader.
/// </summary>
/// <param name="parent"></param>
/// <param name="reader"></param>
public override void Unpack(IInternalPersistent parent, System.IO.BinaryReader reader)
{
DataIsUserDefined = false;
bool?r = CollectionOnDisk.ReadPersistentData(parent, reader, ref Data);
if (r == null)
{
DataIsUserDefined = true;
}
else if (!r.Value)
{
Data = null;
}
}
private void AllocateAvailableBlock(CollectionOnDisk parent, HeaderData hd, Sop.DataBlock block)
{
//** Allocate block from the "available" segment
block.DataAddress = hd.NextAllocatableAddress;
hd.NextAllocatableAddress += block.Length;
hd.DiskBuffer.IsDirty = true;
hd.IsModifiedInTransaction = true;
//** register the add of new block to transaction log
Transaction.ITransactionLogger trans = parent.Transaction;
if (trans == null)
{
return;
}
((Transaction.TransactionBase)trans).RegisterAdd(parent, block.DataAddress, block.Length);
}
protected internal override bool RegisterRecycle(CollectionOnDisk collection, long blockAddress,
int blockSize)
{
if (!Transaction.RegisterRecycle(_addBlocksStore, _recycledBlocksStore, collection, blockAddress, blockSize))
{
using (var writePool = new ConcurrentIOPoolManager())
{
using (var readPool = new ConcurrentIOPoolManager())
{
RegisterSave(collection, blockAddress, blockSize, readPool, writePool);
}
}
}
return(true);
}
internal static bool RegisterRecycle(
Collections.Generic.ISortedDictionary <RecordKey, long> addStore,
Collections.Generic.ISortedDictionary <RecordKey, long> recycleStore,
CollectionOnDisk collection,
long blockAddress,
int blockSize)
{
var key = CreateKey(collection, blockAddress);
//if (InStore(key, blockSize, recycleStore))
// return false;
BackupDataLogKey logKey = new BackupDataLogKey();
logKey.SourceFilename = collection.File.Filename;
logKey.SourceDataAddress = blockAddress;
IEnumerable <KeyValuePair <BackupDataLogKey, BackupDataLogValue> > intersectingLogs;
long mergedBlockStartAddress, mergedBlockSize;
if (GetIntersectingLogs(logKey, blockSize, out intersectingLogs,
out mergedBlockStartAddress, out mergedBlockSize))
{
if (intersectingLogs == null)
{
RegisterAdd(addStore, null, null, collection, blockAddress, blockSize, false);
return(true);
}
// get area(s) outside each intersecting segment and back it up...
Region newRegion = new Region(blockAddress, blockSize);
bool wasIntersected = false;
foreach (KeyValuePair <BackupDataLogKey, BackupDataLogValue> entry in intersectingLogs)
{
if (newRegion.Subtract(entry.Key.SourceDataAddress, entry.Value.DataSize))
{
wasIntersected = true;
}
}
if (wasIntersected)
{
foreach (KeyValuePair <long, int> newArea in newRegion)
{
RegisterAdd(addStore, null, null, collection, newArea.Key, newArea.Value, false);
}
return(true);
}
}
RegisterAdd(addStore, null, null, collection, blockAddress, blockSize, false);
return(true);
}
protected internal override void RegisterRemove(CollectionOnDisk collection)
{
if (IsTransactionStore(collection))
{
((TransactionBase)collection.ParentTransactionLogger).RegisterRemove(collection);
return;
}
if (LogCollection == null)
{
return;
}
if (_inCommit == 0)
{
TrackModification(collection.GetTopParent());
}
}
/// <summary>
/// Recycle DataSet, KeySet and DeletedBlocks' Segments
/// </summary>
public override void Delete()
{
if (DataBlockDriver != null)
{
RemoveDeletedDataBlocks();
CollectionOnDisk cod = GetTopParent();
IDataBlockRecycler db = cod.deletedBlocks;
cod.deletedBlocks = null;
if (DataSet != null)
{
DataSet.Delete();
}
cod.deletedBlocks = db;
}
base.Delete();
}
public void Register(ActionType action,
CollectionOnDisk collection,
long blockAddress,
long blockSize)
{
switch (action)
{
case ActionType.Add:
if (blockSize > (long)DataBlockSize.Maximum)
{
throw new ArgumentOutOfRangeException("blockSize");
}
RegisterAdd(collection, blockAddress, (int)blockSize);
break;
case ActionType.Remove:
if (blockSize > int.MaxValue)
{
throw new ArgumentOutOfRangeException("Register: ActionType.Remove blockSize is bigger than int.MaxValue.");
}
RegisterRemove(collection, blockAddress, (int)blockSize);
break;
case ActionType.Grow:
RegisterFileGrowth(collection, blockAddress, blockSize);
break;
case ActionType.Recycle:
if (blockSize > int.MaxValue)
{
throw new ArgumentOutOfRangeException("Register: ActionType.Recycle blockSize is bigger than int.MaxValue.");
}
RegisterRecycle(collection, blockAddress, (int)blockSize);
break;
case ActionType.RecycleCollection:
if (blockSize > int.MaxValue)
{
throw new ArgumentOutOfRangeException("blockSize");
}
RegisterRecycleCollection(collection, blockAddress, (int)blockSize);
break;
default:
throw new SopException(string.Format("Unsupported Transaction Action {0}", action));
}
}
internal bool ResurfaceDeletedBlockNextSegment(CollectionOnDisk parent,
DeletedBlockInfo dbi, long segmentEnd)
{
//** read next segment of deleted collection
Sop.DataBlock db = CreateBlock(parent.DataBlockSize);
long address = segmentEnd - (int)parent.DataBlockSize;
db = ReadBlockFromDisk(parent, address, true, true, db);
if (db.InternalNextBlockAddress >= 0)
{
dbi.StartBlockAddress = db.InternalNextBlockAddress;
if (parent.File.DeletedCollections != null)
{
parent.File.DeletedCollections.SetTop(dbi);
}
return(true);
}
return(false);
}
/// <summary>
/// Create/Get Data Store for IPersistent typed Key and "Simple typed" Value.
/// NOTE: Simple type means one of the integer, numeric(decimals,...), char data types, byte array
/// or a string
/// </summary>
/// <typeparam name="TKey"></typeparam>
/// <typeparam name="TValue"></typeparam>
/// <param name="createIfNotExist"></param>
/// <param name="container"></param>
/// <param name="comparer"></param>
/// <param name="name"></param>
/// <param name="isDataInKeySegment"> </param>
/// <param name="mruManaged"> </param>
/// <returns></returns>
public ISortedDictionary <TKey, TValue> GetPersistentKey <TKey, TValue>(object container, string name,
System.Collections.Generic.IComparer <TKey> comparer = null,
bool createIfNotExist = true,
bool isDataInKeySegment = true,
bool mruManaged = true)
where TKey : IPersistent, new()
{
if (!CollectionOnDisk.IsSimpleType(typeof(TValue)))
{
throw new ArgumentException(string.Format("Type of TValue ({0}) isn't an SOP simple type.",
typeof(TValue)));
}
BTreeAlgorithm.CurrentOnValueUnpack =
PersistentTypeKeySimpleValue <TKey, TValue> .Collection_OnKeyUnpack;
var r2 = CreateDictionary <PersistentTypeKeySimpleValue <TKey, TValue>, TKey, TValue>(createIfNotExist,
container, name,
containerDod =>
{
var
r =
new PersistentTypeKeySimpleValue
<TKey,
TValue
>(
container,
comparer,
name,
DataStoreType
.
SopOndisk,
null,
isDataInKeySegment);
containerDod.
SetCurrentValueInMemoryData
(r);
return(r);
}, mruManaged);
return(r2);
}
protected internal override void RegisterRemove(CollectionOnDisk collection, long blockAddress, int blockSize)
{
if (IsTransactionStore(collection))
{
((TransactionBase)collection.ParentTransactionLogger).RegisterRemove(collection, blockAddress, blockSize);
return;
}
if (LogCollection == null)
{
return;
}
if (_inCommit == 0)
{
TrackModification(collection.GetTopParent());
}
// object o = 90; // todo: remove return when ready...
return;
// Check if Block is in Growth, RecycledCollection, Add, Recycled blocks segments...
RecordKey key = CreateKey(collection, blockAddress);
if (RegionLogic.IsSegmentInStore(_fileGrowthStore, key, blockSize) ||
RegionLogic.IsSegmentInStore(_recycledSegmentsStore, key, blockSize) ||
RegionLogic.IsSegmentInStore(_addBlocksStore, key, blockSize))
{
return;
}
// check if block is in updated blocks...
if (IsInUpdatedBlocks(collection, blockAddress, blockSize))
{
return;
}
AddMerge(_recycledBlocksStore, key, blockSize);
if (_inCommit == 0)
{
TrackModification(collection.GetTopParent());
}
}
private void RemoveInMemory(CollectionOnDisk coll, long address)
{
bool reload = false;
CollectionOnDisk p = coll;
while (p != null)
{
if (p.RemoveInMemory(address, this) && !reload)
{
reload = true;
}
if (p.Parent is CollectionOnDisk)
{
p = (CollectionOnDisk)p.Parent;
}
else
{
return;
}
}
}
private void BackupData(CollectionOnDisk collection, long blockAddress, int segmentSize)
{
if (_loggerTransDetailsFileStream == null)
{
int bufferSize;
//** open with 1 MB custom buffering
string s = _loggerTransDetailsLogFilename;
if (Server != null)
{
s = Server.NormalizePath(s);
}
_loggerTransDetailsFileStream = File.UnbufferedOpen(s, out bufferSize).RealStream;
_loggerTransDetailsBuffer = new byte[bufferSize];
}
long sourceOffset = collection.FileStream.Position;
collection.FileStream.Seek(blockAddress, System.IO.SeekOrigin.Begin);
//** copy asynchronously from source to target log file
IAsyncResult iar = collection.FileStream.BeginRead(_loggerTransDetailsBuffer, 0, segmentSize, null, null);
if (!iar.IsCompleted)
{
iar.AsyncWaitHandle.WaitOne();
}
collection.FileStream.EndRead(iar);
_loggerTransDetailsFileStream.Seek(0, System.IO.SeekOrigin.Begin);
iar = _loggerTransDetailsFileStream.BeginWrite(_loggerTransDetailsBuffer, 0, segmentSize, null, null);
if (!iar.IsCompleted)
{
iar.AsyncWaitHandle.WaitOne();
}
_loggerTransDetailsFileStream.EndWrite(iar);
_loggerTransDetailsFileStream.Flush();
if (_loggerTransDetailsFileStream.Length > segmentSize)
{
_loggerTransDetailsFileStream.SetLength(segmentSize);
}
collection.FileStream.Seek(sourceOffset, System.IO.SeekOrigin.Begin);
}
/// <summary>
/// Unpack this item for DeSerialization from Stream
/// </summary>
/// <param name="parent"></param>
/// <param name="reader"></param>
public virtual void Unpack(IInternalPersistent parent, System.IO.BinaryReader reader)
{
bool?r = CollectionOnDisk.ReadPersistentData(parent, reader, ref Key);
if (r == null)
{
if (((BTreeAlgorithm)parent).onKeyUnpack != null)
{
Key = ((BTreeAlgorithm)parent).onKeyUnpack(reader);
}
else
{
throw new SopException("Can't Deserialize Custom persisted 'Key'.");
}
}
if (Value == null)
{
var f = (File.File)InternalPersistent.GetParent(parent, typeof(File.File));
Value = new ItemOnDisk(f.DataBlockSize);
}
bool valueIsReference = reader.ReadBoolean();
if (valueIsReference)
{
Value.DiskBuffer.DataAddress = reader.ReadInt64();
}
else
{
object o = Value;
CollectionOnDisk.ReadPersistentData(parent, reader, ref o);
Value = (ItemOnDisk)o;
if (Value.DataIsUserDefined && ((BTreeAlgorithm)parent).onValueUnpack != null)
{
Value.Data = ((BTreeAlgorithm)parent).onValueUnpack(reader);
}
}
IsDirty = false;
}
/// <summary>
/// Commit a transaction
/// </summary>
/// <param name="phase">
/// FirstPhase will make changes permanent but keep transaction log so rollback
/// is still possible.
///
/// SecondPhase will:
/// 1. call FirstPhase commit if this transaction is in UnCommitted phase
/// 2. clear the transaction log to complete Commit
/// NOTE: Rollback is no longer allowed after completion of SecondPhase
/// </param>
///<returns>true if successful otherwise false</returns>
public override bool InternalCommit(CommitPhase phase)
{
if (CurrentCommitPhase == CommitPhase.Committed)
{
throw new InvalidOperationException(string.Format("Transaction '{0}' is already committed.", Id));
}
_inCommit++;
try
{
switch (phase)
{
case CommitPhase.FirstPhase:
if (CurrentCommitPhase == CommitPhase.UnCommitted)
{
RollbackConflicts();
//** save all cached data of each collection
var parents =
new Dictionary <CollectionOnDisk, object>(ModifiedCollections.Count);
var closeColls = new List <RecordKey>();
foreach (KeyValuePair <RecordKey, CollectionOnDisk> kvp in ModifiedCollections)
{
CollectionOnDisk collection = kvp.Value;
CollectionOnDisk ct = collection.GetTopParent();
if (ct.IsOpen)
{
parents[ct] = null;
}
else
{
closeColls.Add(kvp.Key);
}
}
foreach (CollectionOnDisk collection in parents.Keys)
{
if (!collection.IsOpen)
{
continue;
}
collection.Flush();
collection.OnCommit();
}
foreach (RecordKey k in closeColls)
{
ModifiedCollections.Remove(k);
}
//File.DeletedCollections.Flush();
CurrentCommitPhase = CommitPhase.FirstPhase;
//** don't clear transaction log so rollback is still possible
return(true);
}
break;
case CommitPhase.SecondPhase:
if (CurrentCommitPhase == CommitPhase.UnCommitted)
{
if (!Commit(CommitPhase.FirstPhase))
{
break;
}
}
if (CurrentCommitPhase == CommitPhase.FirstPhase)
{
//** mark second phase completed as when it starts, no turning back...
CurrentCommitPhase = CommitPhase.SecondPhase;
//** preserve the recycled segment so on rollback it can be restored...
foreach (CollectionOnDisk collection in ModifiedCollections.Values)
{
if (!collection.IsOpen)
{
continue;
}
collection.HeaderData.RecycledSegmentBeforeTransaction =
collection.HeaderData.RecycledSegment;
if (collection.HeaderData.RecycledSegmentBeforeTransaction != null)
{
collection.HeaderData.RecycledSegmentBeforeTransaction =
(DeletedBlockInfo)
collection.HeaderData.RecycledSegmentBeforeTransaction.Clone();
}
}
//** delete new (AddStore), updated (LogCollection) and
//** file growth segments (FileGrowthStore) "log entries"
ClearStores(true);
//** todo: Record on Trans Log the FileSet Remove action + info needed for
//** commit resume "on crash and restart" 11/9/08
File.Delete(Server.Path + DataBackupFilename);
//** todo: remove from trans Log the FileSet Remove action... 11/09/08
return(true);
}
break;
}
//** auto roll back this transaction if commit failed above
if (CurrentCommitPhase != CommitPhase.Rolledback &&
CurrentCommitPhase != CommitPhase.SecondPhase)
{
Rollback();
}
return(false);
}
finally
{
_inCommit--;
if (Parent == null)
{
CollectionOnDisk.transaction = null;
}
else
{
Parent.Children.Remove(this);
}
}
}
/// <summary>
/// Create Instance
/// </summary>
/// <param name="transaction"> </param>
/// <param name="typeId"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public object CreateInstance(Transaction.ITransactionLogger transaction,
byte typeId, params KeyValuePair <string, object>[] parameters)
{
if (typeId >= (byte)BuiltinTypes.MinType && typeId <= (byte)BuiltinTypes.MaxType)
{
File.File f;
switch ((BuiltinTypes)typeId)
{
case BuiltinTypes.SortedDictionaryOnDisk:
f = (File.File)CollectionOnDisk.GetParamValue(parameters, "File");
if (f != null)
{
if (transaction is Sop.Transaction.TransactionBase)
{
return(((Sop.Transaction.TransactionBase)transaction).CreateCollection(f));
}
else
{
return(new SortedDictionaryOnDisk(f));
}
}
return(transaction is Sop.Transaction.TransactionBase
? ((Sop.Transaction.TransactionBase)transaction).CreateCollection(f)
: new SortedDictionaryOnDisk());
case BuiltinTypes.SharedBlockOnDiskList:
f = (File.File)CollectionOnDisk.GetParamValue(parameters, "File");
if (f != null)
{
return(new SharedBlockOnDiskList(f));
}
return(new SharedBlockOnDiskList());
case BuiltinTypes.BTreeAlgorithm:
return(new BTreeAlgorithm());
case BuiltinTypes.File:
return(transaction is Sop.Transaction.TransactionBase
? ((Sop.Transaction.TransactionBase)transaction).CreateFile()
: new File.File());
case BuiltinTypes.FileSet:
return(transaction is Sop.Transaction.TransactionBase
? ((Sop.Transaction.TransactionBase)transaction).CreateFileSet()
: new FileSet());
case BuiltinTypes.LinkedListOnDisk:
return(new LinkedListOnDisk());
case BuiltinTypes.LinkedListOnDiskItemOnDisk:
return(new LinkedListOnDisk.LinkedItemOnDisk());
case BuiltinTypes.BTreeOnDiskTreeNode:
return(new BTreeNodeOnDisk());
case BuiltinTypes.BTreeItemOnDisk:
return(new ItemOnDisk());
case BuiltinTypes.DeletedBlockInfo:
return(new DeletedBlockInfo());
case BuiltinTypes.DataReference:
return(new DataReference());
case BuiltinTypes.BackupDataLogKey:
return(new Transaction.Transaction.BackupDataLogKey());
case BuiltinTypes.BackupDataLogValue:
return(new Transaction.Transaction.BackupDataLogValue());
case BuiltinTypes.UserDefined:
return(null);
default:
throw new ArgumentOutOfRangeException("typeId", typeId, "Not supported Type ID.");
}
}
//** TypeID should be a User type...
throw new InvalidOperationException(
string.Format("Built-in TypeStore doesn't support this Type ID '{0}'.", typeId)
);
}
protected internal virtual void TrackModification(CollectionOnDisk collection, bool untrack = false)
{
}
protected internal abstract void RegisterRecycleCollection(CollectionOnDisk collection,
long blockAddress, int blockSize);
