XrdEc::StrmWriter Class Reference

#include <XrdEcStrmWriter.hh>

Collaboration diagram for XrdEc::StrmWriter:

Classes
struct	global_status_t

Public Member Functions
	StrmWriter (const ObjCfg &objcfg)
	Constructor. More...
virtual	~StrmWriter ()
	Destructor. More...
void	Open (XrdCl::ResponseHandler *handler, uint16_t timeout=0)
void	Write (uint32_t size, const void *buff, XrdCl::ResponseHandler *handler)
void	Close (XrdCl::ResponseHandler *handler, uint16_t timeout=0)
uint64_t	GetSize ()

Private Types
typedef sync_queue < std::future< WrtBuff * > >	buff_queue

Private Member Functions
void	EnqueueBuff (std::unique_ptr< WrtBuff > wrtbuff)
std::unique_ptr< WrtBuff >	DequeueBuff ()
void	WriteBuff (std::unique_ptr< WrtBuff > buff)
std::vector< char >	GetMetadataBuffer ()
void	CloseImpl (XrdCl::ResponseHandler *handler, uint16_t timeout=0)

Static Private Member Functions
static void	writer_routine (StrmWriter *me)

Private Attributes
const ObjCfg &	objcfg
std::unique_ptr< WrtBuff >	wrtbuff
std::vector< std::shared_ptr < XrdCl::ZipArchive > >	dataarchs
std::vector< std::shared_ptr < XrdCl::File > >	metadataarchs
std::vector< std::vector< char > >	cdbuffs
buff_queue	buffers
std::atomic< bool >	writer_thread_stop
std::thread	writer_thread
size_t	next_blknb
global_status_t	global_status

Detailed Description

The Stream Writer objects, responsible for writing erasure coded data into selected placement group.

Member Typedef Documentation

typedef sync_queue<std::future<WrtBuff*> > XrdEc::StrmWriter::buff_queue

private

Constructor & Destructor Documentation

XrdEc::StrmWriter::StrmWriter ( const ObjCfg &  objcfg )

inline

Constructor.

virtual XrdEc::StrmWriter::~StrmWriter ( )

inlinevirtual

Destructor.

References buffers, XrdEc::sync_queue< Element >::interrupt(), writer_thread, and writer_thread_stop.

Member Function Documentation

void XrdEc::StrmWriter::Close	(	XrdCl::ResponseHandler *	handler,
		uint16_t	timeout = 0
	)

Close the data object

Parameters

handler

: user callback

void XrdEc::StrmWriter::CloseImpl ( XrdCl::ResponseHandler *  handler, uint16_t  timeout = 0  )

private

Close the data object (implementation)

Parameters

handler

: user callback

Referenced by XrdEc::StrmWriter::global_status_t::issue_close(), and XrdEc::StrmWriter::global_status_t::report_wrt().

std::unique_ptr<WrtBuff> XrdEc::StrmWriter::DequeueBuff ( )

inlineprivate

Dequeue a write buffer after it has been erasure coded and checksumed

Returns

: the write buffer, ready for writing

References buffers, and XrdEc::sync_queue< Element >::dequeue().

Referenced by writer_routine().

void XrdEc::StrmWriter::EnqueueBuff ( std::unique_ptr< WrtBuff >  wrtbuff )

inlineprivate

Enqueue the write buffer for calculating parity and crc32c

Parameters

wrtbuff

: the write buffer

References buffers, XrdEc::sync_queue< Element >::enqueue(), XrdEc::ThreadPool::Instance(), and wrtbuff.

std::vector<char> XrdEc::StrmWriter::GetMetadataBuffer ( )

private

Get a buffer with metadata (CDFH and EOCD records)

Returns

: the buffer with metadata

uint64_t XrdEc::StrmWriter::GetSize ( )

inline

Returns

: get file size

References XrdEc::StrmWriter::global_status_t::get_btswritten(), and global_status.

void XrdEc::StrmWriter::Open	(	XrdCl::ResponseHandler *	handler,
		uint16_t	timeout = 0
	)

Open the data object for writting

Parameters

handler

: user callback

void XrdEc::StrmWriter::Write	(	uint32_t	size,
		const void *	buff,
		XrdCl::ResponseHandler *	handler
	)

Write data to the data object

Parameters

size	: number of bytes to be written
buff	: buffer with data to be written
handler	: user callback

void XrdEc::StrmWriter::WriteBuff ( std::unique_ptr< WrtBuff >  buff )

private

Issue the write requests for the given write buffer

Parameters

buff	: the buffer to be written

Referenced by writer_routine().

static void XrdEc::StrmWriter::writer_routine ( StrmWriter *  me )

inlinestaticprivate

The writing routine running in a dedicated thread.

Parameters

me	: the StrmWriter object

References DequeueBuff(), WriteBuff(), writer_thread_stop, and wrtbuff.

Member Data Documentation

buff_queue XrdEc::StrmWriter::buffers

private

Referenced by DequeueBuff(), EnqueueBuff(), and ~StrmWriter().

std::vector<std::vector<char> > XrdEc::StrmWriter::cdbuffs

private

std::vector<std::shared_ptr<XrdCl::ZipArchive> > XrdEc::StrmWriter::dataarchs

private

global_status_t XrdEc::StrmWriter::global_status

private

Referenced by GetSize().

std::vector<std::shared_ptr<XrdCl::File> > XrdEc::StrmWriter::metadataarchs

private

size_t XrdEc::StrmWriter::next_blknb

private

const ObjCfg& XrdEc::StrmWriter::objcfg

private

std::thread XrdEc::StrmWriter::writer_thread

private

Referenced by ~StrmWriter().

std::atomic<bool> XrdEc::StrmWriter::writer_thread_stop

private

Referenced by writer_routine(), and ~StrmWriter().

std::unique_ptr<WrtBuff> XrdEc::StrmWriter::wrtbuff

private

Referenced by EnqueueBuff(), and writer_routine().

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

• XrdEcStrmWriter.hh