#include <wiredtiger_util.h>

Classes
class	ErrorAccumulator

Public Member Functions
template<typename ResultType >
ResultType	_castStatisticsValue (uint64_t statisticsValue)

template<typename ResultType >
ResultType	_castStatisticsValue (uint64_t statisticsValue, ResultType maximumResultType)

Static Public Member Functions
static void	fetchTypeAndSourceURI (OperationContext opCtx, const std::string &tableUri, std::string type, std::string *source)
	Fetch the type and source fields out of the colgroup metadata. More...

static Status	exportTableToBSON (WT_SESSION s, const std::string &uri, const std::string &config, BSONObjBuilder bob)
	Reads contents of table using URI and exports all keys to BSON as string elements. More...

static void	appendSnapshotWindowSettings (WiredTigerKVEngine engine, WiredTigerSession session, BSONObjBuilder *bob)
	Appends information about the storage engine's currently available snapshots and the settings that affect that window of maintained history. More...

static StatusWith< std::string >	getMetadata (OperationContext *opCtx, StringData uri)
	Gets entire metadata string for collection/index at URI. More...

static Status	getApplicationMetadata (OperationContext opCtx, StringData uri, BSONObjBuilder bob)
	Reads app_metadata for collection/index at URI as a BSON document. More...

static StatusWith< BSONObj >	getApplicationMetadata (OperationContext *opCtx, StringData uri)

static StatusWith< int64_t >	checkApplicationMetadataFormatVersion (OperationContext *opCtx, StringData uri, int64_t minimumVersion, int64_t maximumVersion)
	Validates formatVersion in application metadata for 'uri'. More...

static Status	checkTableCreationOptions (const BSONElement &configElem)
	Validates the 'configString' specified as a collection or index creation option. More...

static StatusWith< uint64_t >	getStatisticsValue (WT_SESSION *session, const std::string &uri, const std::string &config, int statisticsKey)
	Reads individual statistics using URI. More...

template<typename ResultType >
static StatusWith< ResultType >	getStatisticsValueAs (WT_SESSION *session, const std::string &uri, const std::string &config, int statisticsKey)
	Reads individual statistics using URI and casts to type ResultType. More...

template<typename ResultType >
static StatusWith< ResultType >	getStatisticsValueAs (WT_SESSION *session, const std::string &uri, const std::string &config, int statisticsKey, ResultType maximumResultType)
	Reads individual statistics using URI and casts to type ResultType. More...

static int64_t	getIdentSize (WT_SESSION *s, const std::string &uri)

static size_t	getCacheSizeMB (double requestedCacheSizeGB)
	Return amount of memory to use for the WiredTiger cache based on either the startup option chosen or the amount of available memory on the host. More...

static int	verifyTable (OperationContext opCtx, const std::string &uri, std::vector< std::string > errors=NULL)
	Calls WT_SESSION::validate() on a side-session to ensure that your current transaction isn't left in an invalid state. More...

static bool	useTableLogging (NamespaceString ns, bool replEnabled)

Private Member Functions
	MONGO_DISALLOW_COPYING (WiredTigerUtil)

	WiredTigerUtil ()

Static Private Member Functions
template<typename T >
static T	_castStatisticsValue (uint64_t statisticsValue)
	Casts unsigned 64-bit statistics value to T. More...

template<typename T >
static T	_castStatisticsValue (uint64_t statisticsValue, T maximumResultType)
	Casts unsigned 64-bit statistics value to T. More...

Constructor & Destructor Documentation

◆ WiredTigerUtil()

mongo::WiredTigerUtil::WiredTigerUtil ( )

private

Member Function Documentation

◆ _castStatisticsValue() [1/4]

template<typename T >

static T mongo::WiredTigerUtil::_castStatisticsValue ( uint64_t statisticsValue )

staticprivate

Casts unsigned 64-bit statistics value to T.

If original value exceeds maximum value of T, return max(T).

◆ _castStatisticsValue() [2/4]

template<typename T >

static T mongo::WiredTigerUtil::_castStatisticsValue	(	uint64_t	statisticsValue,
		T	maximumResultType
	)

staticprivate

Casts unsigned 64-bit statistics value to T.

If original value exceeds 'maximumResultType', return 'maximumResultType'.

◆ _castStatisticsValue() [3/4]

template<typename ResultType >

ResultType mongo::WiredTigerUtil::_castStatisticsValue ( uint64_t statisticsValue )

◆ _castStatisticsValue() [4/4]

template<typename ResultType >

ResultType mongo::WiredTigerUtil::_castStatisticsValue	(	uint64_t	statisticsValue,
		ResultType	maximumResultType
	)

◆ appendSnapshotWindowSettings()

void mongo::WiredTigerUtil::appendSnapshotWindowSettings	(	WiredTigerKVEngine *	engine,
		WiredTigerSession *	session,
		BSONObjBuilder *	bob
	)

static

Appends information about the storage engine's currently available snapshots and the settings that affect that window of maintained history.

"snapshot-window-settings" : { "cache pressure percentage threshold" : <num>, "current cache pressure percentage" : <num>, "max target available snapshots window size in seconds" : <num>, "target available snapshots window size in seconds" : <num>, "current available snapshots window size in seconds" : <num>, "latest majority snapshot timestamp available" : <num>, "oldest majority snapshot timestamp available" : <num> }

◆ checkApplicationMetadataFormatVersion()

StatusWith< int64_t > mongo::WiredTigerUtil::checkApplicationMetadataFormatVersion	(	OperationContext *	opCtx,
		StringData	uri,
		int64_t	minimumVersion,
		int64_t	maximumVersion
	)

static

Validates formatVersion in application metadata for 'uri'.

Version must be numeric and be in the range [minimumVersion, maximumVersion]. URI is used in error messages only. Returns actual version.

◆ checkTableCreationOptions()

Status mongo::WiredTigerUtil::checkTableCreationOptions ( const BSONElement & configElem )

static

Validates the 'configString' specified as a collection or index creation option.

◆ exportTableToBSON()

Status mongo::WiredTigerUtil::exportTableToBSON	(	WT_SESSION *	s,
		const std::string &	uri,
		const std::string &	config,
		BSONObjBuilder *	bob
	)

static

Reads contents of table using URI and exports all keys to BSON as string elements.

Additional, adds 'uri' field to output document.

◆ fetchTypeAndSourceURI()

void mongo::WiredTigerUtil::fetchTypeAndSourceURI	(	OperationContext *	opCtx,
		const std::string &	tableUri,
		std::string *	type,
		std::string *	source
	)

static

Fetch the type and source fields out of the colgroup metadata.

'tableUri' must be a valid table: uri.

◆ getApplicationMetadata() [1/2]

Status mongo::WiredTigerUtil::getApplicationMetadata	(	OperationContext *	opCtx,
		StringData	uri,
		BSONObjBuilder *	bob
	)

static

Reads app_metadata for collection/index at URI as a BSON document.

◆ getApplicationMetadata() [2/2]

StatusWith< BSONObj > mongo::WiredTigerUtil::getApplicationMetadata	(	OperationContext *	opCtx,
		StringData	uri
	)

static

◆ getCacheSizeMB()

size_t mongo::WiredTigerUtil::getCacheSizeMB ( double requestedCacheSizeGB )

static

Return amount of memory to use for the WiredTiger cache based on either the startup option chosen or the amount of available memory on the host.

◆ getIdentSize()

int64_t mongo::WiredTigerUtil::getIdentSize	(	WT_SESSION *	s,
		const std::string &	uri
	)

static

◆ getMetadata()

StatusWith< std::string > mongo::WiredTigerUtil::getMetadata	(	OperationContext *	opCtx,
		StringData	uri
	)

static

Gets entire metadata string for collection/index at URI.

◆ getStatisticsValue()

StatusWith< uint64_t > mongo::WiredTigerUtil::getStatisticsValue	(	WT_SESSION *	session,
		const std::string &	uri,
		const std::string &	config,
		int	statisticsKey
	)

static

Reads individual statistics using URI.

List of statistics keys WT_STAT_* can be found in wiredtiger.h.

◆ getStatisticsValueAs() [1/2]

template<typename ResultType >

StatusWith< ResultType > mongo::WiredTigerUtil::getStatisticsValueAs	(	WT_SESSION *	session,
		const std::string &	uri,
		const std::string &	config,
		int	statisticsKey
	)

static

Reads individual statistics using URI and casts to type ResultType.

Caps statistics value at max(ResultType) in case of overflow.

◆ getStatisticsValueAs() [2/2]

template<typename ResultType >

StatusWith< ResultType > mongo::WiredTigerUtil::getStatisticsValueAs	(	WT_SESSION *	session,
		const std::string &	uri,
		const std::string &	config,
		int	statisticsKey,
		ResultType	maximumResultType
	)

static

Reads individual statistics using URI and casts to type ResultType.

Caps statistics value at 'maximumResultType'.

◆ MONGO_DISALLOW_COPYING()

mongo::WiredTigerUtil::MONGO_DISALLOW_COPYING ( WiredTigerUtil )

private

◆ useTableLogging()

bool mongo::WiredTigerUtil::useTableLogging	(	NamespaceString	ns,
		bool	replEnabled
	)

static

◆ verifyTable()

int mongo::WiredTigerUtil::verifyTable	(	OperationContext *	opCtx,
		const std::string &	uri,
		std::vector< std::string > *	errors = `NULL`
	)

static

Calls WT_SESSION::validate() on a side-session to ensure that your current transaction isn't left in an invalid state.

If errors is non-NULL, all error messages will be appended to the array.

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

/home/louis/git/mongodbsource.github.io/src/src/mongo/db/storage/wiredtiger/wiredtiger_util.h
/home/louis/git/mongodbsource.github.io/src/src/mongo/db/storage/wiredtiger/wiredtiger_util.cpp

Classes

Public Member Functions

Static Public Member Functions

Private Member Functions

Static Private Member Functions

Constructor & Destructor Documentation

◆ WiredTigerUtil()

Member Function Documentation

◆ _castStatisticsValue() [1/4]

◆ _castStatisticsValue() [2/4]

◆ _castStatisticsValue() [3/4]

◆ _castStatisticsValue() [4/4]

◆ appendSnapshotWindowSettings()

◆ checkApplicationMetadataFormatVersion()

◆ checkTableCreationOptions()

◆ exportTableToBSON()

◆ fetchTypeAndSourceURI()

◆ getApplicationMetadata() [1/2]

◆ getApplicationMetadata() [2/2]

◆ getCacheSizeMB()

◆ getIdentSize()

◆ getMetadata()

◆ getStatisticsValue()

◆ getStatisticsValueAs() [1/2]

◆ getStatisticsValueAs() [2/2]

◆ MONGO_DISALLOW_COPYING()

◆ useTableLogging()

◆ verifyTable()