XrdFileCache::Cache Class Reference

Attaches/creates and detaches/deletes cache-io objects for disk based cache. More...

#include <XrdFileCache.hh>

Inheritance diagram for XrdFileCache::Cache:

Collaboration diagram for XrdFileCache::Cache:

Classes
struct	WriteQ
struct	WriteTask

Public Member Functions
	Cache (XrdOucCacheStats &)
	Constructor. More...
virtual XrdOucCacheIO *	Attach (XrdOucCacheIO *, int Options=0)
	Obtain a new IO object that fronts existing XrdOucCacheIO. More...
virtual int	isAttached ()
	Number of cache-io objects atteched through this cache. More...
virtual XrdOucCache *	Create (XrdOucCache::Parms &, XrdOucCacheIO::aprParms *)
	Unused abstract method. Plugin instantiation role is given to the Factory class. More...
Public Member Functions inherited from XrdOucCache
virtual int	Unlink (const char *)
virtual int	Rmdir (const char *)
virtual int	Rename (const char *, const char *)
virtual int	Truncate (const char *, off_t)
	XrdOucCache ()
virtual	~XrdOucCache ()

Static Public Member Functions
static void	AddWriteTask (Prefetch *p, int ramBlockidx, size_t size, bool fromRead)
	Add downloaded block in write queue. More...
static bool	HaveFreeWritingSlots ()
	Check write queue size is not over limit. More...
static void	RemoveWriteQEntriesFor (Prefetch *p)
	Remove blocks from write queue which belong to given prefetch. This method is used at the time of Prefetch destruction. More...
static void	ProcessWriteTasks ()
	Separate task which writes blocks from ram to disk. More...

Private Member Functions
void	Detach (XrdOucCacheIO *)
	Decrease attached count. Called from IO::Detach(). More...
void	getFilePathFromURL (const char *url, std::string &res) const
	Transfor URL to path on local disk. More...
XrdCl::Log *	clLog () const
	Short log alias. More...

Private Attributes
XrdSysMutex	m_io_mutex
	central lock for this class More...
unsigned int	m_attached
	number of attached IO objects More...
XrdOucCacheStats &	m_stats
	global cache usage statistics More...

Static Private Attributes
static WriteQ	s_writeQ

Friends
class	IOEntireFile
class	IOFileBlock

Additional Inherited Members
Public Attributes inherited from XrdOucCache
XrdOucCacheStats	Stats
Static Public Attributes inherited from XrdOucCache
static const int	optADB = 0x1000
static const int	optFIS = 0x0001
static const int	optFIU = 0x0002
static const int	optRW = 0x0004
static const int	optNEW = 0x0014
static const int	optWIN = 0x0024
static const int	isServer = 0x0010
static const int	isStructured = 0x0020
static const int	canPreRead = 0x0040
static const int	logStats = 0x0080
static const int	Serialized = 0x0004
static const int	ioMTSafe = 0x0008
static const int	Debug = 0x0003

Detailed Description

Attaches/creates and detaches/deletes cache-io objects for disk based cache.

Constructor & Destructor Documentation

XrdFileCache::Cache::Cache

(

XrdOucCacheStats &

)

Constructor.

Member Function Documentation

static void XrdFileCache::Cache::AddWriteTask ( Prefetch *  p, int  ramBlockidx, size_t  size, bool  fromRead  )

static

Add downloaded block in write queue.

virtual XrdOucCacheIO* XrdFileCache::Cache::Attach ( XrdOucCacheIO *  , int  Options = 0  )

virtual

Obtain a new IO object that fronts existing XrdOucCacheIO.

Implements XrdOucCache.

XrdCl::Log* XrdFileCache::Cache::clLog ( ) const

inlineprivate

Short log alias.

References XrdCl::DefaultEnv::GetLog().

virtual XrdOucCache* XrdFileCache::Cache::Create ( XrdOucCache::Parms &  , XrdOucCacheIO::aprParms *    )

inlinevirtual

Unused abstract method. Plugin instantiation role is given to the Factory class.

Implements XrdOucCache.

void XrdFileCache::Cache::Detach ( XrdOucCacheIO *  )

private

Decrease attached count. Called from IO::Detach().

void XrdFileCache::Cache::getFilePathFromURL ( const char *  url, std::string &  res  ) const

private

Transfor URL to path on local disk.

static bool XrdFileCache::Cache::HaveFreeWritingSlots ( )

static

Check write queue size is not over limit.

virtual int XrdFileCache::Cache::isAttached ( )

virtual

Number of cache-io objects atteched through this cache.

Reimplemented from XrdOucCache.

static void XrdFileCache::Cache::ProcessWriteTasks ( )

static

Separate task which writes blocks from ram to disk.

static void XrdFileCache::Cache::RemoveWriteQEntriesFor ( Prefetch *  p )

static

Remove blocks from write queue which belong to given prefetch. This method is used at the time of Prefetch destruction.

Friends And Related Function Documentation

friend class IOEntireFile

friend

friend class IOFileBlock

friend

Member Data Documentation

unsigned int XrdFileCache::Cache::m_attached

private

number of attached IO objects

XrdSysMutex XrdFileCache::Cache::m_io_mutex

private

central lock for this class

XrdOucCacheStats& XrdFileCache::Cache::m_stats

private

global cache usage statistics

WriteQ XrdFileCache::Cache::s_writeQ

staticprivate

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

• XrdFileCache.hh