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 (XrdOucCacheIO &io, XrdOucCacheStats &stats, Cache &cache)
	Constructor. More...
	~IOFileBlock ()
	Destructor. More...
virtual XrdOucCacheIO *	Detach ()
virtual int	Read (char *Buffer, long long Offset, int Length)
	Pass Read request to the corresponding Prefetch object. More...
virtual bool	ioActive ()
	Virtual method of XrdOucCacheIO. Called to check if destruction needs to be done in a separate task. More...
Public Member Functions inherited from XrdFileCache::IO
	IO (XrdOucCacheIO &io, XrdOucCacheStats &stats, Cache &cache)
virtual XrdOucCacheIO *	Base ()
	Original data source. More...
virtual long long	FSize ()
	Original data source URL. 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	StartPrefetch ()
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 ()
Prefetch *	newBlockPrefetcher (long long off, int blocksize, XrdOucCacheIO *io)

Private Attributes
long long	m_blocksize
	size of file-block More...
std::map< int, Prefetch * >	m_blocks
	map of created blocks More...
XrdSysMutex	m_mutex
	map mutex More...

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
XrdCl::Log *	clLog () const
Protected Attributes inherited from XrdFileCache::IO
XrdOucCacheIO &	m_io
	original data source More...
XrdOucCacheStats &	m_statsGlobal
	reference to Cache statistics More...
Cache &	m_cache
	reference to Cache needed in detach More...

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	(	XrdOucCacheIO &	io,
		XrdOucCacheStats &	stats,
		Cache &	cache
	)

Constructor.

XrdFileCache::IOFileBlock::~IOFileBlock ( )

inline

Destructor.

Member Function Documentation

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

virtual

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

Returns

original source XrdPosixFile

Reimplemented from XrdOucCacheIO.

void XrdFileCache::IOFileBlock::GetBlockSizeFromPath ( )

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.

Prefetch* XrdFileCache::IOFileBlock::newBlockPrefetcher ( long long  off, int  blocksize, XrdOucCacheIO *  io  )

private

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

virtual

Pass Read request to the corresponding Prefetch object.

Implements XrdOucCacheIO.

Member Data Documentation

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

private

map of created blocks

long long XrdFileCache::IOFileBlock::m_blocksize

private

size of file-block

XrdSysMutex XrdFileCache::IOFileBlock::m_mutex

private

map mutex

---

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

• XrdFileCacheIOFileBlock.hh