XrdFileCache::IOFileBlock Class Reference

Downloads original file into multiple files, chunked into blocks. Only blocks that are asked for are downloaded. Handles read requests as they come along. More...

#include <XrdFileCacheIOFileBlock.hh>

Inheritance diagram for XrdFileCache::IOFileBlock:

Collaboration diagram for XrdFileCache::IOFileBlock:

Public Member Functions
	IOFileBlock (XrdOucCacheIO2 *io, XrdOucCacheStats &stats, Cache &cache)
	Constructor. More...
	~IOFileBlock ()
	Destructor. More...
virtual XrdOucCacheIO *	Detach ()
virtual int	Read (char *Buffer, long long Offset, int Length)
virtual bool	ioActive ()
	Virtual method of XrdOucCacheIO. Called to check if destruction needs to be done in a separate task. More...
virtual int	Fstat (struct stat &sbuff)
virtual long long	FSize ()
Public Member Functions inherited from XrdFileCache::IO
	IO (XrdOucCacheIO2 *io, XrdOucCacheStats &stats, Cache &cache)
virtual XrdOucCacheIO *	Base ()
	Original data source. More...
virtual const char *	Path ()
	Original data source URL. More...
virtual int	Sync ()
virtual int	Trunc (long long Offset)
virtual int	Write (char *Buffer, long long Offset, int Length)
virtual void	Update (XrdOucCacheIO2 &iocp)
XrdSysTrace *	GetTrace ()
XrdOucCacheIO2 *	GetInput ()
Public Member Functions inherited from XrdOucCacheIO2
virtual const char *	Location ()
virtual void	Read (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rlen)
virtual void	ReadV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int rnum)
virtual void	Sync (XrdOucCacheIOCB &iocb)
virtual void	Write (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen)
virtual	~XrdOucCacheIO2 ()
Public Member Functions inherited from XrdOucCacheIO
virtual int	ReadV (const XrdOucIOVec *readV, int n)
virtual void	Preread (long long Offset, int Length, int Opts=0)
virtual void	Preread (aprParms &Parms)
virtual	~XrdOucCacheIO ()

Private Member Functions
void	GetBlockSizeFromPath ()
int	initLocalStat ()
File *	newBlockFile (long long off, int blocksize)
void	CloseInfoFile ()

Private Attributes
long long	m_blocksize
	size of file-block More...
std::map< int, File * >	m_blocks
	map of created blocks More...
XrdSysMutex	m_mutex
	map mutex More...
struct stat *	m_localStat
Info	m_info
XrdOssDF *	m_infoFile

Additional Inherited Members
Public Attributes inherited from XrdOucCacheIO
XrdOucCacheStats	Statistics
Static Public Attributes inherited from XrdOucCacheIO
static const int	SingleUse = 0x0001
Protected Member Functions inherited from XrdFileCache::IO
const char *	GetPath ()
Protected Attributes inherited from XrdFileCache::IO
XrdOucCacheStats &	m_statsGlobal
	reference to Cache statistics More...
Cache &	m_cache
	reference to Cache needed in detach More...
const char *	m_traceID
std::string	m_path

Detailed Description

Downloads original file into multiple files, chunked into blocks. Only blocks that are asked for are downloaded. Handles read requests as they come along.

Constructor & Destructor Documentation

XrdFileCache::IOFileBlock::IOFileBlock	(	XrdOucCacheIO2 *	io,
		XrdOucCacheStats &	stats,
		Cache &	cache
	)

Constructor.

XrdFileCache::IOFileBlock::~IOFileBlock

(

)

Destructor.

Member Function Documentation

void XrdFileCache::IOFileBlock::CloseInfoFile ( )

private

virtual XrdOucCacheIO* XrdFileCache::IOFileBlock::Detach ( )

virtual

Detach from Cache. Note: this will delete the object.

Returns

original source XrdPosixFile

Reimplemented from XrdOucCacheIO.

virtual long long XrdFileCache::IOFileBlock::FSize ( )

virtual

Implements XrdOucCacheIO.

virtual int XrdFileCache::IOFileBlock::Fstat ( struct stat &  sbuff )

virtual

Perform an fstat() operation (defaults to passthrough).

Parameters

sbuff

reference to the stat buffer to be filled in. Only fields st_size, st_blocks, st_mtime (st_atime and st_ctime may be set to st_mtime), st_ino, and st_mode need to be set. All other fields are preset and should not be changed.

Returns

<0 - fstat failed, value is -errno. =0 - fstat succeeded, sbuff holds stat information. >0 - fstat could not be done, forward operation to next level.

Reimplemented from XrdOucCacheIO2.

void XrdFileCache::IOFileBlock::GetBlockSizeFromPath ( )

private

int XrdFileCache::IOFileBlock::initLocalStat ( )

private

virtual bool XrdFileCache::IOFileBlock::ioActive ( )

virtual

Virtual method of XrdOucCacheIO. Called to check if destruction needs to be done in a separate task.

Reimplemented from XrdOucCacheIO.

File* XrdFileCache::IOFileBlock::newBlockFile ( long long  off, int  blocksize  )

private

virtual int XrdFileCache::IOFileBlock::Read ( char *  Buffer, long long  Offset, int  Length  )

virtual

Implements XrdOucCacheIO.

Member Data Documentation

std::map<int, File*> XrdFileCache::IOFileBlock::m_blocks

private

map of created blocks

long long XrdFileCache::IOFileBlock::m_blocksize

private

size of file-block

Info XrdFileCache::IOFileBlock::m_info

private

XrdOssDF* XrdFileCache::IOFileBlock::m_infoFile

private

struct stat* XrdFileCache::IOFileBlock::m_localStat

private

XrdSysMutex XrdFileCache::IOFileBlock::m_mutex

private

map mutex

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The documentation for this class was generated from the following file:

• XrdFileCacheIOFileBlock.hh