Hypertable::CellCacheScanner Class Reference

Provides a scanning interface to a CellCache. More...

#include <CellCacheScanner.h>

Inheritance diagram for Hypertable::CellCacheScanner:

Collaboration diagram for Hypertable::CellCacheScanner:

Classes
class	CellCacheEntry

Public Types
typedef std::map< const SerializedKey, uint32_t >	CellCacheMap

Public Member Functions
	CellCacheScanner (CellCachePtr cellcache, ScanContext *scan_ctx)
virtual	~CellCacheScanner ()
virtual void	forward ()
virtual bool	get (Key &key, ByteString &value)
virtual int64_t	get_disk_read ()
Public Member Functions inherited from Hypertable::CellListScanner
	CellListScanner ()
	CellListScanner (ScanContext *scan_ctx)
virtual	~CellListScanner ()
ScanContext *	scan_context ()
void	add_disk_read (int64_t amount)

Private Member Functions
bool	internal_get ()
void	internal_forward ()
void	load_entry_cache ()

Private Attributes
CellCache::CellMap::iterator	m_start_iter
CellCache::CellMap::iterator	m_end_iter
CellCache::CellMap::iterator	m_cur_iter
CellCacheMap::iterator	m_delete_iter
CellCachePtr	m_cell_cache_ptr
std::mutex &	m_cell_cache_mutex
CellCacheEntry	m_cur_entry
std::vector< CellCacheEntry >	m_entry_cache
size_t	m_entry_cache_next {}
CellCacheMap	m_deletes
bool	m_in_deletes {}
bool	m_eos {}
bool	m_keys_only {}

Additional Inherited Members
Protected Attributes inherited from Hypertable::CellListScanner
uint64_t	m_disk_read {}
ScanContext *	m_scan_context_ptr {}

Detailed Description

Provides a scanning interface to a CellCache.

Definition at line 34 of file CellCacheScanner.h.

Member Typedef Documentation

typedef std::map<const SerializedKey, uint32_t> Hypertable::CellCacheScanner::CellCacheMap

Definition at line 43 of file CellCacheScanner.h.

Constructor & Destructor Documentation

CellCacheScanner::CellCacheScanner	(	CellCachePtr	cellcache,
		ScanContext *	scan_ctx
	)

Figure out what potential start ROW and CF delete keys look like. We only need to worry about this if the scan starts in the middle of the row, ie the scan ctx has defined cell intervals. Further we only need to worry about CF deletes if this scan starts in the middle of a column family ie, the scan contains a qualified column.

Look for any DELETE_ROW records for this row and add them to the m_deletes map

Definition at line 37 of file CellCacheScanner.cc.

virtual Hypertable::CellCacheScanner::~CellCacheScanner ( )

inlinevirtual

Definition at line 37 of file CellCacheScanner.h.

Member Function Documentation

void CellCacheScanner::forward ( )

virtual

Implements Hypertable::CellListScanner.

Definition at line 148 of file CellCacheScanner.cc.

bool CellCacheScanner::get ( Key &  key, ByteString &  value  )

virtual

Implements Hypertable::CellListScanner.

Definition at line 130 of file CellCacheScanner.cc.

virtual int64_t Hypertable::CellCacheScanner::get_disk_read ( )

inlinevirtual

Implements Hypertable::CellListScanner.

Definition at line 41 of file CellCacheScanner.h.

void CellCacheScanner::internal_forward ( )

private

Definition at line 172 of file CellCacheScanner.cc.

bool CellCacheScanner::internal_get ( )

private

Definition at line 153 of file CellCacheScanner.cc.

void CellCacheScanner::load_entry_cache ( )

private

Definition at line 204 of file CellCacheScanner.cc.

Member Data Documentation

std::mutex& Hypertable::CellCacheScanner::m_cell_cache_mutex

private

Definition at line 63 of file CellCacheScanner.h.

CellCachePtr Hypertable::CellCacheScanner::m_cell_cache_ptr

private

Definition at line 62 of file CellCacheScanner.h.

CellCacheEntry Hypertable::CellCacheScanner::m_cur_entry

private

Definition at line 64 of file CellCacheScanner.h.

CellCache::CellMap::iterator Hypertable::CellCacheScanner::m_cur_iter

private

Definition at line 60 of file CellCacheScanner.h.

CellCacheMap::iterator Hypertable::CellCacheScanner::m_delete_iter

private

Definition at line 61 of file CellCacheScanner.h.

CellCacheMap Hypertable::CellCacheScanner::m_deletes

private

Definition at line 67 of file CellCacheScanner.h.

CellCache::CellMap::iterator Hypertable::CellCacheScanner::m_end_iter

private

Definition at line 59 of file CellCacheScanner.h.

std::vector<CellCacheEntry> Hypertable::CellCacheScanner::m_entry_cache

private

Definition at line 65 of file CellCacheScanner.h.

size_t Hypertable::CellCacheScanner::m_entry_cache_next {}

private

Definition at line 66 of file CellCacheScanner.h.

bool Hypertable::CellCacheScanner::m_eos {}

private

Definition at line 69 of file CellCacheScanner.h.

bool Hypertable::CellCacheScanner::m_in_deletes {}

private

Definition at line 68 of file CellCacheScanner.h.

bool Hypertable::CellCacheScanner::m_keys_only {}

private

Definition at line 70 of file CellCacheScanner.h.

CellCache::CellMap::iterator Hypertable::CellCacheScanner::m_start_iter

private

Definition at line 58 of file CellCacheScanner.h.

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

• /home/doug/src/hypertable/src/cc/Hypertable/RangeServer/CellCacheScanner.h
• /home/doug/src/hypertable/src/cc/Hypertable/RangeServer/CellCacheScanner.cc