Simple store for keeping values in an associative array for the current process. More...

Inheritance diagram for HashBagOStuff:

[legend]

Collaboration diagram for HashBagOStuff:

[legend]

Public Member Functions
	__construct ( $params=[])

	clear ()
	Clear all values in cache. More...

	decr ( $key, $value=1, $flags=0)
	Decrease stored value of $key by $value while preserving its TTL. More...

	hasKey ( $key)
	Does this bag have a non-null value for the given key? More...

	incr ( $key, $value=1, $flags=0)
	Increase stored value of $key by $value while preserving its TTL. More...

	makeKeyInternal ( $keyspace, $components)
	Make a cache key for the given keyspace and components. More...

Public Member Functions inherited from MediumSpecificBagOStuff
	__construct (array $params=[])

	add ( $key, $value, $exptime=0, $flags=0)
	Insert an item if it does not already exist. More...

	addBusyCallback (callable $workCallback)
	Let a callback be run to avoid wasting time on special blocking calls. More...

	changeTTL ( $key, $exptime=0, $flags=0)
	Change the expiration on a key if it exists. More...

	changeTTLMulti (array $keys, $exptime, $flags=0)
	Change the expiration of multiple keys that exist. More...

	delete ( $key, $flags=0)
	Delete an item. More...

	deleteMulti (array $keys, $flags=0)
	Batch deletion. More...

	deleteObjectsExpiringBefore ( $timestamp, callable $progress=null, $limit=INF, string $tag=null)
	Delete all objects expiring before a certain date. More...

	get ( $key, $flags=0)
	Get an item with the given key. More...

	getMulti (array $keys, $flags=0)
	Get an associative array containing the item for each of the keys that have items. More...

	getQoS ( $flag)

	getSegmentationSize ()

	getSegmentedValueMaxSize ()

	incrWithInit ( $key, $exptime, $step=1, $init=null, $flags=0)
	Increase the value of the given key (no TTL change) if it exists or create it otherwise. More...

	lock ( $key, $timeout=6, $exptime=6, $rclass='')

	makeGlobalKey ( $collection,... $components)
	Make a cache key for the default keyspace and given components. More...

	makeKey ( $collection,... $components)
	Make a cache key for the global keyspace and given components. More...

	merge ( $key, callable $callback, $exptime=0, $attempts=10, $flags=0)
	Merge changes into the existing cache value (possibly creating a new one) More...

	set ( $key, $value, $exptime=0, $flags=0)
	Set an item. More...

	setMulti (array $valueByKey, $exptime=0, $flags=0)
	Batch insertion/replace. More...

	unlock ( $key)
	Release an advisory lock on a key string. More...

Public Member Functions inherited from BagOStuff
	clearLastError ()
	Clear the "last error" registry. More...

	getCurrentTime ()

	getLastError ( $watchPoint=0)
	Get the "last error" registry. More...

	getLogger ()

	getScopedLock ( $key, $timeout=6, $exptime=30, $rclass='')
	Get a lightweight exclusive self-unlocking lock. More...

	getWithSetCallback ( $key, $exptime, $callback, $flags=0)
	Get an item, regenerating and setting it if not found. More...

	isKeyGlobal ( $key)
	Check whether a cache key is in the global keyspace. More...

	registerWrapperInfoForStats (string $prefixComponent, string $statsGroup, callable $collectionCallback)
	Register info about a caching layer class that uses BagOStuff as a backing store. More...

	setLogger (LoggerInterface $logger)

	setMockTime (&$time)

	setNewPreparedValues (array $valueByKey)
	Stage a set of new key values for storage and estimate the amount of bytes needed. More...

	watchErrors ()
	Get a "watch point" token that can be used to get the "last error" to occur after now. More...

Public Attributes
const	KEY_CAS = 2

const	KEY_EXP = 1

const	KEY_VAL = 0

Public Attributes inherited from BagOStuff
const	MAX_CONFLICTS_ONE = 1
	Abort after the first merge conflict. More...

const	READ_LATEST = 1
	Bitfield constants for get()/getMulti(); these are only advisory. More...

const	READ_VERIFIED = 2
	Promise that the caller handles detection of staleness. More...

const	WRITE_ALLOW_SEGMENTS = 16
	Allow partitioning of the value if it is a large string. More...

const	WRITE_BACKGROUND = 64
	If supported, do not block on write operation completion; instead, treat writes as succesful based on whether they could be buffered. More...

const	WRITE_CACHE_ONLY = 8
	Bitfield constants for set()/merge(); these are only advisory. More...

const	WRITE_PRUNE_SEGMENTS = 32
	Delete all the segments if the value is partitioned. More...

Public Attributes inherited from Wikimedia\LightweightObjectStore\StorageAwareness
const	ATTR_DURABILITY = 2
	Durability of writes; see QOS_DURABILITY_* (higher means stronger) More...

const	ATTR_EMULATION = 1
	Emulation/fallback mode; see QOS_EMULATION_*; higher is better. More...

const	ERR_NO_RESPONSE = 1
	Storage medium failed to yield a complete response to an operation. More...

const	ERR_NONE = 0
	No storage medium error. More...

const	ERR_UNEXPECTED = 3
	Storage medium operation failed due to usage limitations or an I/O error. More...

const	ERR_UNREACHABLE = 2
	Storage medium could not be reached to establish a connection. More...

const	QOS_DURABILITY_DISK = 4
	Data is saved to disk and writes do not usually block on fsync() More...

const	QOS_DURABILITY_NONE = 1
	Data is never saved to begin with (blackhole store) More...

const	QOS_DURABILITY_RDBMS = 5
	Data is saved to disk and writes usually block on fsync(), like a standard RDBMS. More...

const	QOS_DURABILITY_SCRIPT = 2
	Data is lost at the end of the current web request or CLI script. More...

const	QOS_DURABILITY_SERVICE = 3
	Data is lost once the service storing the data restarts. More...

const	QOS_EMULATION_SQL = 1
	Fallback disk-based SQL store. More...

const	QOS_UNKNOWN = INF
	Generic "unknown" value; useful for comparisons (always "good enough") More...

Protected Member Functions
	convertGenericKey ( $key)
	Convert a "generic" reversible cache key into one for this cache. More...

	doAdd ( $key, $value, $exptime=0, $flags=0)
	Insert an item if it does not already exist. More...

	doDelete ( $key, $flags=0)
	Delete an item. More...

	doGet ( $key, $flags=0, &$casToken=null)
	Get an item. More...

	doIncrWithInit ( $key, $exptime, $step, $init, $flags)

	doSet ( $key, $value, $exptime=0, $flags=0)
	Set an item. More...

	expire ( $key)

Protected Member Functions inherited from MediumSpecificBagOStuff
	cas ( $casToken, $key, $value, $exptime=0, $flags=0)
	Set an item if the current CAS token matches the provided CAS token. More...

	debug ( $text)

	doCas ( $casToken, $key, $value, $exptime=0, $flags=0)
	Set an item if the current CAS token matches the provided CAS token. More...

	doChangeTTL ( $key, $exptime, $flags)

	doChangeTTLMulti (array $keys, $exptime, $flags=0)

	doDeleteMulti (array $keys, $flags=0)

	doGetMulti (array $keys, $flags=0)
	Get an associative array containing the item for each of the keys that have items. More...

	doLock ( $key, $timeout, $exptime)

	doSetMulti (array $data, $exptime=0, $flags=0)

	doUnlock ( $key)

	getExpirationAsTimestamp ( $exptime)
	Convert an optionally relative timestamp to an absolute time. More...

	getExpirationAsTTL ( $exptime)
	Convert an optionally absolute expiry time to a relative time. More...

	getSerialized ( $value, $key)
	Get the serialized form a value, logging a warning if it involves custom classes. More...

	isInteger ( $value)
	Check if a value is an integer. More...

	isRelativeExpiration ( $exptime)

	makeLockKey ( $key)

	makeValueOrSegmentList ( $key, $value, $exptime, $flags, &$ok)
	Make the entry to store at a key (inline or segment list), storing any segments. More...

	mergeViaCas ( $key, callable $callback, $exptime, $attempts, $flags)

	resolveSegments ( $key, $mainValue)
	Get and reassemble the chunks of blob at the given key. More...

	serialize ( $value)

	tokensMatch ( $value, $otherValue)

	unserialize ( $value)

	updateOpStats (string $op, array $keyInfo)

Protected Member Functions inherited from BagOStuff
	componentsFromGenericKey ( $key)
	Extract the components from a "generic" reversible cache key. More...

	determineKeyPrefixForStats ( $key)

	fieldHasFlags ( $field, $flags)

	genericKeyFromComponents (... $components)
	At a minimum, there must be a keyspace and collection name component. More...

	mergeFlagMaps (array $bags)
	Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map. More...

	proxyCall (string $method, int $arg0Sig, int $resSig, array $genericArgs, BagOStuff $wrapper)
	Call a method on behalf of wrapper BagOStuff instance that uses "generic" keys. More...

	setLastError ( $error)
	Set the "last error" registry due to a problem encountered during an attempted operation. More...

Protected Attributes
mixed[]	$bag = []

int double	$maxCacheKeys
	Max entries allowed, INF for unlimited. More...

Protected Attributes inherited from MediumSpecificBagOStuff
array< string, array >	$locks = []
	Map of (key => (class LOCK_* constant => value) More...

float	$maxLockSendDelay = 0.05
	Seconds; maximum expected seconds for a lock ping to reach the backend. More...

int	$segmentationSize
	Bytes; chunk size of segmented cache values. More...

int	$segmentedValueMaxSize
	Bytes; maximum total size of a segmented cache value. More...

const	LOCK_DEPTH = 1

const	LOCK_EXPIRY = 3

const	LOCK_RCLASS = 0

const	LOCK_TIME = 2

const	METRIC_OP_ADD = 'add'

const	METRIC_OP_CAS = 'cas'

const	METRIC_OP_CHANGE_TTL = 'change_ttl'

const	METRIC_OP_DECR = 'decr'

const	METRIC_OP_DELETE = 'delete'

const	METRIC_OP_GET = 'get'

const	METRIC_OP_INCR = 'incr'

const	METRIC_OP_SET = 'set'

const	PASS_BY_REF = -1
	Idiom for doGet() to return extra information by reference. More...

Protected Attributes inherited from BagOStuff
callable null	$asyncHandler

int[]	$attrMap = []
	Map of (BagOStuff:ATTR_* constant => BagOStuff:QOS_* constant) More...

string	$keyspace
	Default keyspace; used by makeKey() More...

int	$lastError = self::ERR_NONE
	BagOStuff:ERR_* constant of the last error that occurred. More...

int	$lastErrorId = 0
	Error event sequence number of the last error that occurred. More...

LoggerInterface	$logger

StatsdDataFactoryInterface	$stats

array< string, array >	$wrapperInfoByPrefix = []
	Cache key processing callbacks and info for metrics. More...

Additional Inherited Members
Static Protected Attributes inherited from BagOStuff
static int	$nextErrorMonitorId = 1
	Next sequence number to use for watch/error events. More...

Detailed Description

Simple store for keeping values in an associative array for the current process.

Data will not persist and is not shared with other processes.

Stability: newable

Definition at line 32 of file HashBagOStuff.php.

Constructor & Destructor Documentation

◆ __construct()

HashBagOStuff::__construct ( $params = [] )

Stability: stable: to call

Parameters

array

$params

Additional parameters include:

maxKeys : only allow this many keys (using oldest-first eviction) @phpcs:ignore Generic.Files.LineLength

Definition at line 55 of file HashBagOStuff.php.

References Wikimedia\LightweightObjectStore\StorageAwareness\ATTR_DURABILITY, and Wikimedia\LightweightObjectStore\StorageAwareness\QOS_DURABILITY_SCRIPT.

Member Function Documentation

◆ clear()

HashBagOStuff::clear ( )

Clear all values in cache.

Definition at line 159 of file HashBagOStuff.php.

◆ convertGenericKey()

HashBagOStuff::convertGenericKey ( $key )

protected

Convert a "generic" reversible cache key into one for this cache.

See also: BagOStuff::genericKeyFromComponents()

Parameters

string $key Keyspace-prepended list of encoded components as a colon-separated value

Returns: string Keyspace-prepended list of encoded components as a colon-separated value

Reimplemented from MediumSpecificBagOStuff.

Definition at line 193 of file HashBagOStuff.php.

◆ decr()

HashBagOStuff::decr	(	$key,
		$value = `1`,
		$flags = `0`
	)

Decrease stored value of $key by $value while preserving its TTL.

Parameters

string	$key
int	$value	Value to subtract from $key (default: 1) [optional]
int	$flags	Bit field of class WRITE_* constants [optional]

Returns: int|bool New value or false on failure

Deprecated:: Since 1.38

Reimplemented from BagOStuff.

Definition at line 126 of file HashBagOStuff.php.

◆ doAdd()

HashBagOStuff::doAdd	(	$key,
		$value,
		$exptime = `0`,
		$flags = `0`
	)

protected

Insert an item if it does not already exist.

Parameters

string	$key
mixed	$value
int	$exptime
int	$flags	Bitfield of BagOStuff::WRITE_* constants (since 1.33)

Returns: bool Success

Reimplemented from MediumSpecificBagOStuff.

Definition at line 107 of file HashBagOStuff.php.

References doSet(), expire(), and hasKey().

◆ doDelete()

HashBagOStuff::doDelete	(	$key,
		$flags = `0`
	)

protected

Delete an item.

Parameters

string	$key
int	$flags	Bitfield of BagOStuff::WRITE_* constants

Returns: bool True if the item was deleted or not found, false on failure

Reimplemented from MediumSpecificBagOStuff.

Definition at line 116 of file HashBagOStuff.php.

Referenced by expire().

◆ doGet()

HashBagOStuff::doGet	(		$key,
			$flags = `0`,
		&	$casToken = `null`
	)

protected

Get an item.

The CAS token should be null if the key does not exist or the value is corrupt

Parameters

string	$key
int	$flags	Bitfield of BagOStuff::READ_* constants [optional]
mixed	&$casToken	CAS token if MediumSpecificBagOStuff::PASS_BY_REF [returned]

Returns: mixed Returns false on failure or if the item does not exist

Reimplemented from MediumSpecificBagOStuff.

Definition at line 69 of file HashBagOStuff.php.

References expire(), hasKey(), KEY_CAS, KEY_VAL, and MediumSpecificBagOStuff\PASS_BY_REF.

Referenced by doIncrWithInit().

◆ doIncrWithInit()

HashBagOStuff::doIncrWithInit	(	$key,
		$exptime,
		$step,
		$init,
		$flags
	)

protected

Parameters

string	$key
int	$exptime
int	$step
int	$init
int	$flags

Returns: int|bool New value or false on failure

Reimplemented from MediumSpecificBagOStuff.

Definition at line 142 of file HashBagOStuff.php.

References doGet(), doSet(), MediumSpecificBagOStuff\isInteger(), and KEY_VAL.

◆ doSet()

HashBagOStuff::doSet	(	$key,
		$value,
		$exptime = `0`,
		$flags = `0`
	)

protected

Set an item.

Parameters

string	$key
mixed	$value
int	$exptime	Either an interval in seconds or a unix timestamp for expiry
int	$flags	Bitfield of BagOStuff::WRITE_* constants

Returns: bool Success

Reimplemented from MediumSpecificBagOStuff.

Definition at line 90 of file HashBagOStuff.php.

References MediumSpecificBagOStuff\getExpirationAsTimestamp().

Referenced by doAdd(), and doIncrWithInit().

◆ expire()

HashBagOStuff::expire ( $key )

protected

Parameters

string $key

Returns: bool

Definition at line 167 of file HashBagOStuff.php.

References doDelete(), BagOStuff\getCurrentTime(), and KEY_EXP.

Referenced by doAdd(), and doGet().

◆ hasKey()

HashBagOStuff::hasKey ( $key )

Does this bag have a non-null value for the given key?

Parameters

string $key

Returns: bool

Since: 1.27

Definition at line 185 of file HashBagOStuff.php.

Referenced by doAdd(), and doGet().

◆ incr()

HashBagOStuff::incr	(	$key,
		$value = `1`,
		$flags = `0`
	)

Increase stored value of $key by $value while preserving its TTL.

Parameters

string	$key	Key to increase
int	$value	Value to add to $key (default: 1) [optional]
int	$flags	Bit field of class WRITE_* constants [optional]

Returns: int|bool New value or false on failure

Deprecated:: Since 1.38

Reimplemented from BagOStuff.

Definition at line 122 of file HashBagOStuff.php.

◆ makeKeyInternal()

HashBagOStuff::makeKeyInternal	(	$keyspace,
		$components
	)

Make a cache key for the given keyspace and components.

Long components might be converted to respective hashes due to size constraints. In extreme cases, all of them might be combined into a single hash component.

Parameters

string	$keyspace	Keyspace component
string[] \| int[]	$components	Key components (key collection name first)

Returns: string Keyspace-prepended list of encoded components as a colon-separated value

Since: 1.27

Reimplemented from MediumSpecificBagOStuff.

Definition at line 189 of file HashBagOStuff.php.

References BagOStuff\$keyspace, and BagOStuff\genericKeyFromComponents().

Member Data Documentation

◆ $bag

mixed [] HashBagOStuff::$bag = []

protected

Definition at line 34 of file HashBagOStuff.php.

◆ $maxCacheKeys

int double HashBagOStuff::$maxCacheKeys

protected

Max entries allowed, INF for unlimited.

Definition at line 36 of file HashBagOStuff.php.

◆ KEY_CAS

const HashBagOStuff::KEY_CAS = 2

Definition at line 46 of file HashBagOStuff.php.

Referenced by doGet().

◆ KEY_EXP

const HashBagOStuff::KEY_EXP = 1

Definition at line 45 of file HashBagOStuff.php.

Referenced by expire().

◆ KEY_VAL

const HashBagOStuff::KEY_VAL = 0

Definition at line 44 of file HashBagOStuff.php.

Referenced by doGet(), and doIncrWithInit().

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

includes/libs/objectcache/HashBagOStuff.php

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ clear()

◆ convertGenericKey()

◆ decr()

◆ doAdd()

◆ doDelete()

◆ doGet()

◆ doIncrWithInit()

◆ doSet()

◆ expire()

◆ hasKey()

◆ incr()

◆ makeKeyInternal()

Member Data Documentation

◆ $bag

◆ $maxCacheKeys

◆ KEY_CAS

◆ KEY_EXP

◆ KEY_VAL