XrdPfc::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 <XrdPfcIOFileBlock.hh>

Inheritance diagram for XrdPfc::IOFileBlock:

Collaboration diagram for XrdPfc::IOFileBlock:

Public Member Functions
	IOFileBlock (XrdOucCacheIO *io, XrdOucCacheStats &stats, Cache &cache)
	~IOFileBlock ()
bool	ioActive ()
	Abstract virtual method of XrdPfcIO Called to check if destruction needs to be done in a separate task. More...
void	DetachFinalize ()
	Abstract virtual method of XrdPfcIO Called to destruct the IO object after it is no longer used. More...
virtual int	Read (char *Buffer, long long Offset, int Length)
virtual int	Fstat (struct stat &sbuff)
virtual long long	FSize ()
Public Member Functions inherited from XrdPfc::IO
	IO (XrdOucCacheIO *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 (XrdOucCacheIO &iocp)
bool	Detach (XrdOucCacheIOCD &iocdP)
XrdSysTrace *	GetTrace ()
XrdOucCacheIO *	GetInput ()
Public Member Functions inherited from XrdOucCacheIO
virtual const char *	Location ()
virtual int	pgRead (char *buff, long long offs, int rdlen, uint32_t *csvec, uint64_t opts=0)
virtual void	pgRead (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rdlen, uint32_t *csvec, uint64_t opts=0)
virtual int	pgWrite (char *buff, long long offs, int rdlen, uint32_t *csvec, uint64_t opts=0)
virtual void	pgWrite (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wrlen, uint32_t *csvec, uint64_t opts=0)
virtual void	Preread (long long offs, int rlen, int opts=0)
virtual void	Preread (aprParms &Parms)
virtual void	Read (XrdOucCacheIOCB &iocb, char *buff, long long offs, int rlen)
virtual int	ReadV (const XrdOucIOVec *readV, int rnum)
virtual void	ReadV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *readV, int rnum)
virtual void	Sync (XrdOucCacheIOCB &iocb)
virtual void	Trunc (XrdOucCacheIOCB &iocb, long long offs)
virtual void	Write (XrdOucCacheIOCB &iocb, char *buff, long long offs, int wlen)
virtual int	WriteV (const XrdOucIOVec *writV, int wnum)
virtual void	WriteV (XrdOucCacheIOCB &iocb, const XrdOucIOVec *writV, int wnum)
	XrdOucCacheIO ()
	Construct and Destructor. More...

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_info_file

Additional Inherited Members
Static Public Attributes inherited from XrdOucCacheIO
static const int	SingleUse = 0x0001
	Mark pages for single use. More...
Protected Member Functions inherited from XrdPfc::IO
const char *	GetPath ()
Protected Member Functions inherited from XrdOucCacheIO
virtual	~XrdOucCacheIO ()
Protected Attributes inherited from XrdPfc::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

XrdPfc::IOFileBlock::IOFileBlock	(	XrdOucCacheIO *	io,
		XrdOucCacheStats &	stats,
		Cache &	cache
	)

XrdPfc::IOFileBlock::~IOFileBlock

(

)

Member Function Documentation

void XrdPfc::IOFileBlock::CloseInfoFile ( )

private

void XrdPfc::IOFileBlock::DetachFinalize ( )

virtual

Abstract virtual method of XrdPfcIO Called to destruct the IO object after it is no longer used.

Implements XrdPfc::IO.

virtual long long XrdPfc::IOFileBlock::FSize ( )

virtual

Obtain size of the file.

Returns

Size of the file in bytes.

Implements XrdOucCacheIO.

virtual int XrdPfc::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 XrdOucCacheIO.

void XrdPfc::IOFileBlock::GetBlockSizeFromPath ( )

private

int XrdPfc::IOFileBlock::initLocalStat ( )

private

bool XrdPfc::IOFileBlock::ioActive ( )

virtual

Abstract virtual method of XrdPfcIO Called to check if destruction needs to be done in a separate task.

Implements XrdPfc::IO.

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

private

virtual int XrdPfc::IOFileBlock::Read ( char *  buff, long long  offs, int  rlen  )

virtual

Perform an synchronous read.

Parameters

buff	pointer to the buffer to receive the results. The buffer must remain valid until the callback is invoked.
offs	the offset into the file.
rlen	the number of bytes to read.

Returns

< 0 - Read failed, value is -errno. >=0 - Read succeeded, value is number of bytes read.

Implements XrdOucCacheIO.

Member Data Documentation

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

private

map of created blocks

long long XrdPfc::IOFileBlock::m_blocksize

private

size of file-block

Info XrdPfc::IOFileBlock::m_info

private

XrdOssDF* XrdPfc::IOFileBlock::m_info_file

private

struct stat* XrdPfc::IOFileBlock::m_localStat

private

XrdSysMutex XrdPfc::IOFileBlock::m_mutex

private

map mutex

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

• XrdPfcIOFileBlock.hh