Hypertable::CellStoreScannerIntervalBlockIndex< IndexT > Class Template Reference

Provides the ability to scan over a portion of a cell store using its block index. More...

#include <CellStoreScannerIntervalBlockIndex.h>

Inheritance diagram for Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >:

Collaboration diagram for Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >:

Public Types
typedef IndexT::iterator	IndexIteratorT

Public Member Functions
	CellStoreScannerIntervalBlockIndex (CellStorePtr &cellstore, IndexT *index, SerializedKey start_key, SerializedKey end_key, ScanContext *scan_ctx)
virtual	~CellStoreScannerIntervalBlockIndex ()
virtual void	forward ()
virtual bool	get (Key &key, ByteString &value)
Public Member Functions inherited from Hypertable::CellStoreScannerInterval
	CellStoreScannerInterval ()
virtual	~CellStoreScannerInterval ()
int64_t	get_disk_read ()

Private Member Functions
bool	fetch_next_block (bool eob=false)
	This method fetches the 'next' compressed block of key/value pairs from the underlying CellStore. More...

Private Attributes
CellStorePtr	m_cellstore
IndexT *	m_index {}
IndexIteratorT	m_iter
BlockInfo	m_block
Key	m_key
SerializedKey	m_cur_key
ByteString	m_cur_value
SerializedKey	m_start_key
SerializedKey	m_end_key
const char *	m_end_row {}
DynamicBuffer	m_key_buf
BlockCompressionCodec *	m_zcodec {}
KeyDecompressor *	m_key_decompressor {}
int32_t	m_fd {-1}
bool	m_cached {}
bool	m_check_for_range_end {}
int	m_file_id {}
ScanContext *	m_scan_ctx {}
ScanContext::CstrRowSet &	m_rowset

Additional Inherited Members
Protected Attributes inherited from Hypertable::CellStoreScannerInterval
uint64_t	m_disk_read

Detailed Description

template<typename IndexT>
class Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >

Provides the ability to scan over a portion of a cell store using its block index.

Template Parameters

IndexT

Type of block index

Definition at line 47 of file CellStoreScannerIntervalBlockIndex.h.

Member Typedef Documentation

template<typename IndexT >

typedef IndexT::iterator Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::IndexIteratorT

Definition at line 50 of file CellStoreScannerIntervalBlockIndex.h.

Constructor & Destructor Documentation

template<typename IndexT >

CellStoreScannerIntervalBlockIndex::CellStoreScannerIntervalBlockIndex	(	CellStorePtr &	cellstore,
		IndexT *	index,
		SerializedKey	start_key,
		SerializedKey	end_key,
		ScanContext *	scan_ctx
	)

End of range check

Column family check

Definition at line 50 of file CellStoreScannerIntervalBlockIndex.cc.

template<typename IndexT >

CellStoreScannerIntervalBlockIndex::~CellStoreScannerIntervalBlockIndex ( )

virtual

Definition at line 106 of file CellStoreScannerIntervalBlockIndex.cc.

Member Function Documentation

template<typename IndexT >

bool CellStoreScannerIntervalBlockIndex::fetch_next_block ( bool  eob = false )

private

This method fetches the 'next' compressed block of key/value pairs from the underlying CellStore.

Preconditions required to call this method: 1. m_block is cleared and m_iter points to the m_index entry of the first block to fetch 'or' 2. m_block is loaded with the current block and m_iter points to the m_index entry of the current block

Parameters

eob	end of block indicator, true if being called because at end of block

Returns

true if next block successfully fetched, false if no next block

Cache lookup / block read

Read compressed block

inflate compressed block

Insert or checkin compressed block into cache

take ownership of inflate buffer

Insert uncompressed block into cache

Definition at line 187 of file CellStoreScannerIntervalBlockIndex.cc.

template<typename IndexT >

void CellStoreScannerIntervalBlockIndex::forward ( )

virtual

Column family check

Implements Hypertable::CellStoreScannerInterval.

Definition at line 132 of file CellStoreScannerIntervalBlockIndex.cc.

template<typename IndexT >

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

virtual

Implements Hypertable::CellStoreScannerInterval.

Definition at line 118 of file CellStoreScannerIntervalBlockIndex.cc.

Member Data Documentation

template<typename IndexT >

BlockInfo Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_block

private

Definition at line 65 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

bool Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_cached {}

private

Definition at line 76 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

CellStorePtr Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_cellstore

private

Definition at line 62 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

bool Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_check_for_range_end {}

private

Definition at line 77 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

SerializedKey Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_cur_key

private

Definition at line 67 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

ByteString Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_cur_value

private

Definition at line 68 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

SerializedKey Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_end_key

private

Definition at line 70 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

const char* Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_end_row {}

private

Definition at line 71 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

int32_t Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_fd {-1}

private

Definition at line 75 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

int Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_file_id {}

private

Definition at line 78 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

IndexT* Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_index {}

private

Definition at line 63 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

IndexIteratorT Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_iter

private

Definition at line 64 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

Key Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_key

private

Definition at line 66 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

DynamicBuffer Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_key_buf

private

Definition at line 72 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

KeyDecompressor* Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_key_decompressor {}

private

Definition at line 74 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

ScanContext::CstrRowSet& Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_rowset

private

Definition at line 80 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

ScanContext* Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_scan_ctx {}

private

Definition at line 79 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

SerializedKey Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_start_key

private

Definition at line 69 of file CellStoreScannerIntervalBlockIndex.h.

template<typename IndexT >

BlockCompressionCodec* Hypertable::CellStoreScannerIntervalBlockIndex< IndexT >::m_zcodec {}

private

Definition at line 73 of file CellStoreScannerIntervalBlockIndex.h.

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

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