C# Class GSF.IO.FileStructure.TransactionalFileStructure

This class is responsible for managing the transactions that occur on the file system. Therefore, it keeps up with the latest snapshot of the file allocation table, permits only a single concurrent edit of the archive system, and determines when a file can be deleted when there are no read or write transactions. It also containst the IO system.

Inheritance: IDisposable

显示文件 Open project: GridProtectionAlliance/openHistorian Class Usage Examples

Public Methods

Method	Description
BeginEdit ( ) : TransactionalEdit	This will start a transactional edit on the file.
ChangeExtension ( string extension, bool isReadOnly, bool isSharingEnabled ) : void	Changes the extension of the current file.
ChangeShareMode ( bool isReadOnly, bool isSharingEnabled ) : void	Reopens the file with different permissions.
CreateFile ( string fileName, int blockSize ) : TransactionalFileStructure	Creates a new archive file using the provided file. File is editable.
CreateInMemory ( int blockSize ) : TransactionalFileStructure	Creates a new archive file that is completely in memory
Dispose ( ) : void	Releases all the resources used by the TransactionalFileStructure object.
OpenFile ( string fileName, bool isReadOnly ) : TransactionalFileStructure	Opens an existing file.

Private Methods

Method	Description
OnTransactionCommitted ( ) : void
OnTransactionRolledBack ( ) : void
TransactionalFileStructure ( DiskIo diskIo ) : System

Method Details

BeginEdit() public method

This will start a transactional edit on the file.

public BeginEdit ( ) : TransactionalEdit
return	TransactionalEdit

ChangeExtension() public method

Changes the extension of the current file.

public ChangeExtension ( string extension, bool isReadOnly, bool isSharingEnabled ) : void
extension	string	the new extension
isReadOnly	bool	If the file should be reopened as readonly
isSharingEnabled	bool	If the file should share read privileges.
return	void

ChangeShareMode() public method

Reopens the file with different permissions.

public ChangeShareMode ( bool isReadOnly, bool isSharingEnabled ) : void
isReadOnly	bool	If the file should be reopened as readonly
isSharingEnabled	bool	If the file should share read privileges.
return	void

CreateFile() public static method

Creates a new archive file using the provided file. File is editable.

public static CreateFile ( string fileName, int blockSize ) : TransactionalFileStructure
fileName	string
blockSize	int
return	TransactionalFileStructure

CreateInMemory() public static method

Creates a new archive file that is completely in memory

public static CreateInMemory ( int blockSize ) : TransactionalFileStructure
blockSize	int
return	TransactionalFileStructure

Dispose() public method

Releases all the resources used by the TransactionalFileStructure object.

public Dispose ( ) : void
return	void

OpenFile() public static method

Opens an existing file.

public static OpenFile ( string fileName, bool isReadOnly ) : TransactionalFileStructure
fileName	string
isReadOnly	bool
return	TransactionalFileStructure