Hypertable::CellList Class Reference

Abstract base class for cell lists (sorted lists of key/value pairs). More...

#include <CellList.h>

Inheritance diagram for Hypertable::CellList:

Collaboration diagram for Hypertable::CellList:

Public Types
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
virtual	~CellList ()
virtual void	add (const Key &key, const ByteString value)=0
	Inserts a key/value pair into the cell list. More...
virtual CellListScannerPtr	create_scanner (ScanContext *scan_ctx)
	Creates a scanner on this cell list. More...
virtual void	split_row_estimate_data (SplitRowDataMapT &split_row_data)
	Populates split_row_data with unique row and count estimates for this list. More...
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::string	m_start_row
std::string	m_end_row

Detailed Description

Abstract base class for cell lists (sorted lists of key/value pairs).

Cell lists include cell stores and cell caches.

Definition at line 42 of file CellList.h.

Member Typedef Documentation

typedef StlAllocator<SplitRowDataValue> Hypertable::CellList::SplitRowDataAlloc

Definition at line 64 of file CellList.h.

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

Definition at line 66 of file CellList.h.

typedef std::pair<const char *, int64_t> Hypertable::CellList::SplitRowDataValue

Definition at line 63 of file CellList.h.

Constructor & Destructor Documentation

virtual Hypertable::CellList::~CellList ( )

inlinevirtual

Definition at line 44 of file CellList.h.

Member Function Documentation

virtual void Hypertable::CellList::add ( const Key &  key, const ByteString  value  )

pure virtual

Inserts a key/value pair into the cell list.

Parameters

key	key object
value	ByteString representing value

Implemented in Hypertable::CellStoreV6, Hypertable::CellStoreV7, Hypertable::CellStoreV3, Hypertable::CellStoreV4, Hypertable::CellStoreV5, Hypertable::CellStoreV2, Hypertable::CellCache, Hypertable::CellStoreV1, Hypertable::CellStore, and Hypertable::CellStoreV0.

virtual CellListScannerPtr Hypertable::CellList::create_scanner ( ScanContext *  scan_ctx )

inlinevirtual

Creates a scanner on this cell list.

Parameters

scan_ctx

smart pointer to scan context

Returns

pointer to newly allocated scanner

Reimplemented in Hypertable::CellStoreV6, Hypertable::CellStoreV7, Hypertable::CellStoreV3, Hypertable::CellStoreV4, Hypertable::CellStoreV2, Hypertable::CellStoreV1, Hypertable::CellStore, Hypertable::CellStoreV5, Hypertable::CellCache, and Hypertable::CellStoreV0.

Definition at line 61 of file CellList.h.

virtual const char* Hypertable::CellList::get_end_row ( )

inlinevirtual

Returns the end row of this cell list.

This value is used to restrict the end range of the cell list to values that are less than or equal to this row key. It is used in cell stores to allow them to be shared after a split.

Returns

the row key of the end row (inclusive)

Definition at line 96 of file CellList.h.

virtual const char* Hypertable::CellList::get_start_row ( )

inlinevirtual

Returns the start row of this cell list.

This value is used to restrict the start range of the cell list to values that are greater than this row key. It is used in cell stores to allow them to be shared after a split.

Returns

the row key of the start row (not inclusive)

Definition at line 86 of file CellList.h.

virtual void Hypertable::CellList::split_row_estimate_data ( SplitRowDataMapT &  split_row_data )

inlinevirtual

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 in Hypertable::CellStoreV6, Hypertable::CellStoreV7, Hypertable::CellStoreV5, Hypertable::CellStore, and Hypertable::CellCache.

Definition at line 74 of file CellList.h.

Member Data Documentation

std::string Hypertable::CellList::m_end_row

protected

Definition at line 100 of file CellList.h.

std::string Hypertable::CellList::m_start_row

protected

Definition at line 99 of file CellList.h.

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

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