C# Class DBreeze.LianaTrie.LTrieWriteCache

Inheritance: IDisposable

Mostra file Open project: hhblaze/DBreeze Class Usage Examples

Public Methods

Method	Description
Commit ( byte &rootData, byte &oldRootData ) : void
Dispose ( ) : void
GenerationNodeRead ( bool useCache, byte pointer, byte cachedGenerationMapLine, int MaximumNodeLineLength ) : byte[]
GenerationNodeWritingEnd ( byte pointer, byte data ) : byte[]	If line exists - makes nothing, otherwise writes in Writing Generation Node to the end of File. We use current generation node pointer to black list it. if we reuse this new pointer inside of one transaction for overwriting, we don't need to back it up for rollback any more.
GenerationNodeWritingOver ( byte pointer, byte newData, byte generationMapLine, byte kidsBeforeModification ) : void	OverWriting Generation Node, we supply params where, oldData and newData. Old Data - not used thou OverWriting Generation Node, we supply params where, oldData and newData.
GetNodeKids ( byte generationMapLine ) : byte[]	Returns NULL if not found
LTrieWriteCache ( LTrie trie ) : System
ReadDynamicDataBlock ( byte &initPtr, bool useCache ) : byte[]
ReadKey ( bool useCache, byte pointer ) : byte[]	Internal function for reading key only from DB storage Is called from ReadKey
ReadKeyValue ( bool useCache, byte pointer, long &valueStartPtr, uint &valueLength, byte &key, byte &val ) : void	Interanl Function for reading Key and Value in one set. Initial block read is setUp to 4096 bytes
ReadValue ( byte pointer, bool useCache, long &valueStartPtr, uint &valueLength ) : byte[]
ReadValuePartially ( byte pointer, uint startIndex, uint length, bool useCache, long &valueStartPtr, uint &valueLength ) : byte[]
RecreateDB ( ) : void	Used by Root Node RemoveAll with key re-creation
RollBack ( ) : void
RootNodeRead ( ) : byte[]
TransactionalCommit ( byte &rootData, byte &oldRootData ) : void
TransactionalCommitFinished ( ) : void	We need here to clear old root and call Storage Commit is finished
TransactionalRollBack ( ) : void
ValueWritingEnd ( byte &data, byte oldPtr ) : byte[]
ValueWritingOver ( byte pointer, byte &oldData, byte &newData, byte &key ) : void
WriteDynamicDataBlock ( byte &initPtr, byte &data ) : byte[]

Private Methods

Method	Description
RootNodeWrite ( byte rootData ) : void

Method Details

Commit() public method

public Commit ( byte &rootData, byte &oldRootData ) : void
rootData	byte
oldRootData	byte
return	void

Dispose() public method

public Dispose ( ) : void
return	void

GenerationNodeRead() public method

public GenerationNodeRead ( bool useCache, byte pointer, byte cachedGenerationMapLine, int MaximumNodeLineLength ) : byte[]
useCache	bool
pointer	byte
cachedGenerationMapLine	byte
MaximumNodeLineLength	int
return	byte[]

GenerationNodeWritingEnd() public method

If line exists - makes nothing, otherwise writes in Writing Generation Node to the end of File. We use current generation node pointer to black list it. if we reuse this new pointer inside of one transaction for overwriting, we don't need to back it up for rollback any more.

public GenerationNodeWritingEnd ( byte pointer, byte data ) : byte[]
pointer	byte
data	byte
return	byte[]

GenerationNodeWritingOver() public method

OverWriting Generation Node, we supply params where, oldData and newData. Old Data - not used thou OverWriting Generation Node, we supply params where, oldData and newData.

public GenerationNodeWritingOver ( byte pointer, byte newData, byte generationMapLine, byte kidsBeforeModification ) : void
pointer	byte
newData	byte
generationMapLine	byte
kidsBeforeModification	byte
return	void

GetNodeKids() public method

Returns NULL if not found

public GetNodeKids ( byte generationMapLine ) : byte[]
generationMapLine	byte
return	byte[]

LTrieWriteCache() public method

public LTrieWriteCache ( LTrie trie ) : System
trie	LTrie
return	System

ReadDynamicDataBlock() public method

public ReadDynamicDataBlock ( byte &initPtr, bool useCache ) : byte[]
initPtr	byte
useCache	bool
return	byte[]

ReadKey() public method

Internal function for reading key only from DB storage Is called from ReadKey

public ReadKey ( bool useCache, byte pointer ) : byte[]
useCache	bool
pointer	byte	ptr to KVP
return	byte[]

ReadKeyValue() public method

Interanl Function for reading Key and Value in one set. Initial block read is setUp to 4096 bytes

public ReadKeyValue ( bool useCache, byte pointer, long &valueStartPtr, uint &valueLength, byte &key, byte &val ) : void
useCache	bool
pointer	byte	ptr to KVP
valueStartPtr	long	will be more then 0 only in case if valueLength more then 0. It makes no diff for the null and byte[0] values in this context. Avoid byte[0]
valueLength	uint	will be 0 if val is null and if val is byte[0]
key	byte
val	byte
return	void

ReadValue() public method

public ReadValue ( byte pointer, bool useCache, long &valueStartPtr, uint &valueLength ) : byte[]
pointer	byte	ptr to KVP
useCache	bool
valueStartPtr	long
valueLength	uint
return	byte[]

ReadValuePartially() public method

public ReadValuePartially ( byte pointer, uint startIndex, uint length, bool useCache, long &valueStartPtr, uint &valueLength ) : byte[]
pointer	byte
startIndex	uint
length	uint
useCache	bool
valueStartPtr	long	returns pointer where value starts from. -1 if can't be determined
valueLength	uint	returns full value length; 0 - default
return	byte[]

RecreateDB() public method

Used by Root Node RemoveAll with key re-creation

public RecreateDB ( ) : void
return	void

RollBack() public method

public RollBack ( ) : void
return	void

RootNodeRead() public method

public RootNodeRead ( ) : byte[]
return	byte[]

TransactionalCommit() public method

public TransactionalCommit ( byte &rootData, byte &oldRootData ) : void
rootData	byte
oldRootData	byte
return	void

TransactionalCommitFinished() public method

We need here to clear old root and call Storage Commit is finished

public TransactionalCommitFinished ( ) : void
return	void

TransactionalRollBack() public method

public TransactionalRollBack ( ) : void
return	void

ValueWritingEnd() public method

public ValueWritingEnd ( byte &data, byte oldPtr ) : byte[]
data	byte
oldPtr	byte
return	byte[]

ValueWritingOver() public method

public ValueWritingOver ( byte pointer, byte &oldData, byte &newData, byte &key ) : void
pointer	byte
oldData	byte
newData	byte
key	byte
return	void

WriteDynamicDataBlock() public method

public WriteDynamicDataBlock ( byte &initPtr, byte &data ) : byte[]
initPtr	byte
data	byte
return	byte[]