Represents a sorted list of key/value pairs in memory. More...

#include <CellCache.h>

Inheritance diagram for Hypertable::CellCache:

Collaboration diagram for Hypertable::CellCache:

Classes
struct	Statistics
	Holds cache statistics. More...

Public Types
typedef std::pair< const SerializedKey, uint32_t >	Value

typedef CellCacheAllocator< Value >	Alloc

typedef std::map< const SerializedKey, uint32_t, std::less< const SerializedKey > , Alloc >	CellMap

Public Types inherited from Hypertable::CellList
typedef std::pair< const char *, int64_t >	SplitRowDataValue

typedef StlAllocator < SplitRowDataValue >	SplitRowDataAlloc

typedef std::map< const char *, int64_t, LtCstr, SplitRowDataAlloc >	SplitRowDataMapT

Public Member Functions
	CellCache ()

	CellCache (CellCacheArena &arena)

virtual	~CellCache ()

void	add (const Key &key, const ByteString value) override
	Adds a key/value pair to the CellCache. More...

virtual void	add_counter (const Key &key, const ByteString value)

void	split_row_estimate_data (SplitRowDataMapT &split_row_data) override
	Populates `split_row_data` with unique row and count estimates for this list. More...

CellListScannerPtr	create_scanner (ScanContext *scan_ctx) override
	Creates a CellCacheScanner object that contains an shared pointer to this CellCache. More...

void	lock ()

void	unlock ()

size_t	size ()

bool	empty ()

int64_t	memory_used ()
	Returns the amount of memory used by the CellCache. More...

uint64_t	memory_allocated ()
	Returns the amount of memory allocated by the CellCache. More...

int64_t	logical_size ()

void	add_statistics (Statistics &stats)

int32_t	delete_count ()

void	populate_key_set (KeySet &keys)

CellCacheArena &	arena ()

Public Member Functions inherited from Hypertable::CellList
virtual	~CellList ()

virtual const char *	get_start_row ()
	Returns the start row of this cell list. More...

virtual const char *	get_end_row ()
	Returns the end row of this cell list. More...

Protected Attributes
std::mutex	m_mutex

CellCacheArena	m_arena

CellMap	m_cell_map

int32_t	m_deletes {}

int32_t	m_collisions {}

int64_t	m_key_bytes {}

int64_t	m_value_bytes {}

bool	m_have_counter_deletes {}

Protected Attributes inherited from Hypertable::CellList
std::string	m_start_row

std::string	m_end_row

Friends
class	CellCacheScanner

Detailed Description

Represents a sorted list of key/value pairs in memory.

All updates get written to the CellCache and later get "compacted" into a CellStore on disk.

Definition at line 52 of file CellCache.h.

Member Typedef Documentation

typedef CellCacheAllocator<Value> Hypertable::CellCache::Alloc

Definition at line 145 of file CellCache.h.

typedef std::map<const SerializedKey, uint32_t, std::less<const SerializedKey>, Alloc> Hypertable::CellCache::CellMap

Definition at line 147 of file CellCache.h.

typedef std::pair<const SerializedKey, uint32_t> Hypertable::CellCache::Value

Definition at line 144 of file CellCache.h.

Constructor & Destructor Documentation

CellCache::CellCache ( )

Definition at line 41 of file CellCache.cc.

Hypertable::CellCache::CellCache ( CellCacheArena & arena )

virtual Hypertable::CellCache::~CellCache ( )

inlinevirtual

Definition at line 68 of file CellCache.h.

Member Function Documentation

void CellCache::add	(	const Key &	key,
		const ByteString	value
	)

overridevirtual

Adds a key/value pair to the CellCache.

This method assumes that the CellCache has been locked by a call to lock. Copies of the key and value are created and inserted into the underlying cell map

Parameters

key	key to be inserted
value	value to inserted

Implements Hypertable::CellList.

Definition at line 51 of file CellCache.cc.

void CellCache::add_counter	(	const Key &	key,
		const ByteString	value
	)

virtual

Definition at line 83 of file CellCache.cc.

void Hypertable::CellCache::add_statistics ( Statistics & stats )

inline

Definition at line 116 of file CellCache.h.

CellCacheArena& Hypertable::CellCache::arena ( )

inline

Definition at line 140 of file CellCache.h.

CellListScannerPtr CellCache::create_scanner ( ScanContext * scan_ctx )

overridevirtual

Creates a CellCacheScanner object that contains an shared pointer to this CellCache.

Reimplemented from Hypertable::CellList.

Definition at line 201 of file CellCache.cc.

int32_t Hypertable::CellCache::delete_count ( )

inline

Definition at line 126 of file CellCache.h.

bool Hypertable::CellCache::empty ( )

inline

Definition at line 93 of file CellCache.h.

void Hypertable::CellCache::lock ( )

inline

Definition at line 88 of file CellCache.h.

int64_t Hypertable::CellCache::logical_size ( )

inline

Definition at line 111 of file CellCache.h.

uint64_t Hypertable::CellCache::memory_allocated ( )

inline

Returns the amount of memory allocated by the CellCache.

Definition at line 106 of file CellCache.h.

int64_t Hypertable::CellCache::memory_used ( )

inline

Returns the amount of memory used by the CellCache.

This is the summation of the lengths of all the keys and values in the map.

Definition at line 98 of file CellCache.h.

void Hypertable::CellCache::populate_key_set ( KeySet & keys )

inline

Definition at line 131 of file CellCache.h.

size_t Hypertable::CellCache::size ( )

inline

Definition at line 91 of file CellCache.h.

void CellCache::split_row_estimate_data ( SplitRowDataMapT & split_row_data )

overridevirtual

Populates split_row_data with unique row and count estimates for this list.

Parameters

split_row_data Reference to accumulator map holding estimate of unique rows and counts.

Note: split_row_data should not be cleared

Reimplemented from Hypertable::CellList.

Definition at line 170 of file CellCache.cc.

void Hypertable::CellCache::unlock ( )

inline

Definition at line 89 of file CellCache.h.

Friends And Related Function Documentation

friend class CellCacheScanner

friend

Definition at line 142 of file CellCache.h.

Member Data Documentation

CellCacheArena Hypertable::CellCache::m_arena

protected

Definition at line 152 of file CellCache.h.

CellMap Hypertable::CellCache::m_cell_map

protected

Definition at line 153 of file CellCache.h.

int32_t Hypertable::CellCache::m_collisions {}

protected

Definition at line 155 of file CellCache.h.

int32_t Hypertable::CellCache::m_deletes {}

protected

Definition at line 154 of file CellCache.h.

bool Hypertable::CellCache::m_have_counter_deletes {}

protected

Definition at line 158 of file CellCache.h.

int64_t Hypertable::CellCache::m_key_bytes {}

protected

Definition at line 156 of file CellCache.h.

std::mutex Hypertable::CellCache::m_mutex

protected

Definition at line 151 of file CellCache.h.

int64_t Hypertable::CellCache::m_value_bytes {}

protected

Definition at line 157 of file CellCache.h.

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

/home/doug/src/hypertable/src/cc/Hypertable/RangeServer/CellCache.h
/home/doug/src/hypertable/src/cc/Hypertable/RangeServer/CellCache.cc

Classes

Public Types

Public Member Functions

Protected Attributes

Friends

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation