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BagOStuff Class Reference

Class representing a cache/ephemeral data store. More...

Inheritance diagram for BagOStuff:
Collaboration diagram for BagOStuff:

Public Member Functions

 __construct (array $params=[])
 $params include: More...
 
 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, $expiry=0, $flags=0)
 Change the expiration on a key if it exists. More...
 
 clearLastError ()
 Clear the "last error" registry. More...
 
 decr ( $key, $value=1)
 Decrease stored value of $key by $value while preserving its TTL. More...
 
 delete ( $key, $flags=0)
 Delete an item. More...
 
 deleteMulti (array $keys, $flags=0)
 Batch deletion. More...
 
 deleteObjectsExpiringBefore ( $date, $progressCallback=false)
 Delete all objects expiring before a certain date. More...
 
 get ( $key, $flags=0)
 Get an item with the given key. More...
 
 getLastError ()
 Get the "last error" registered; clearLastError() should be called manually. More...
 
 getMulti (array $keys, $flags=0)
 Get an associative array containing the item for each of the keys that have items. More...
 
 getQoS ( $flag)
 
 getScopedLock ( $key, $timeout=6, $expiry=30, $rclass='')
 Get a lightweight exclusive self-unlocking lock. More...
 
 getWithSetCallback ( $key, $ttl, $callback, $flags=0)
 Get an item with the given key, regenerating and setting it if not found. More...
 
 incr ( $key, $value=1)
 Increase stored value of $key by $value while preserving its TTL. More...
 
 incrWithInit ( $key, $ttl, $value=1, $init=1)
 Increase stored value of $key by $value while preserving its TTL. More...
 
 lock ( $key, $timeout=6, $expiry=6, $rclass='')
 Acquire an advisory lock on a key string. More...
 
 makeGlobalKey ( $class, $component=null)
 Make a global cache key. More...
 
 makeKey ( $class, $component=null)
 Make a cache key, scoped to this instance's keyspace. More...
 
 makeKeyInternal ( $keyspace, $args)
 Construct a cache key. 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...
 
 setDebug ( $bool)
 
 setLogger (LoggerInterface $logger)
 
 setMockTime (&$time)
 
 setMulti (array $data, $exptime=0, $flags=0)
 Batch insertion/replace. More...
 
 unlock ( $key)
 Release an advisory lock on a key string. More...
 

Public Attributes

const READ_LATEST = 1
 Bitfield constants for get()/getMulti() More...
 
const READ_VERIFIED = 2
 
const WRITE_CACHE_ONLY = 8
 
const WRITE_SYNC = 4
 Bitfield constants for set()/merge() More...
 
- Public Attributes inherited from IExpiringStore
const ATTR_EMULATION = 1
 
const ATTR_SYNCWRITES = 2
 
const ERR_NO_RESPONSE = 1
 
const ERR_NONE = 0
 
const ERR_UNEXPECTED = 3
 
const ERR_UNREACHABLE = 2
 
const QOS_EMULATION_SQL = 1
 
const QOS_SYNCWRITES_BE = 2
 
const QOS_SYNCWRITES_NONE = 1
 
const QOS_SYNCWRITES_QC = 3
 
const QOS_SYNCWRITES_SS = 4
 
const QOS_UNKNOWN = INF
 
const TTL_DAY = 86400
 
const TTL_HOUR = 3600
 
const TTL_INDEFINITE = 0
 
const TTL_MINUTE = 60
 
const TTL_MONTH = 2592000
 
const TTL_PROC_LONG = 30
 
const TTL_PROC_SHORT = 3
 
const TTL_SECOND = 1
 
const TTL_WEEK = 604800
 
const TTL_YEAR = 31536000
 

Protected Member Functions

 cas ( $casToken, $key, $value, $exptime=0, $flags=0)
 Check and set an item. More...
 
 convertToExpiry ( $exptime)
 Convert an optionally relative time to an absolute time. More...
 
 convertToRelative ( $exptime)
 Convert an optionally absolute expiry time to a relative time. More...
 
 debug ( $text)
 
 doGet ( $key, $flags=0, &$casToken=null)
 
 expiryIsRelative ( $exptime)
 
 getCurrentTime ()
 
 isInteger ( $value)
 Check if a value is an integer. More...
 
 mergeFlagMaps (array $bags)
 Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map. More...
 
 mergeViaCas ( $key, $callback, $exptime=0, $attempts=10, $flags=0)
 
 setLastError ( $err)
 Set the "last error" registry. More...
 

Protected Attributes

callable null $asyncHandler
 
int [] $attrMap = []
 Map of (ATTR_* class constant => QOS_* class constant) More...
 
callable [] $busyCallbacks = []
 
string $keyspace = 'local'
 
int $lastError = self::ERR_NONE
 ERR_* class constant. More...
 
array [] $locks = []
 Lock tracking. More...
 
LoggerInterface $logger
 
int $syncTimeout
 Seconds. More...
 

Private Member Functions

 trackDuplicateKeys ( $key)
 Track the number of times that a given key has been used. More...
 

Private Attributes

bool $debugMode = false
 
bool $dupeTrackScheduled = false
 
array $duplicateKeyLookups = []
 
bool $reportDupes = false
 
float null $wallClockOverride
 

Detailed Description

Class representing a cache/ephemeral data store.

This interface is intended to be more or less compatible with the PHP memcached client.

Instances of this class should be created with an intended access scope, such as:

  • a) A single PHP thread on a server (e.g. stored in a PHP variable)
  • b) A single application server (e.g. stored in APC or sqlite)
  • c) All application servers in datacenter (e.g. stored in memcached or mysql)
  • d) All application servers in all datacenters (e.g. stored via mcrouter or dynomite)

Callers should use the proper factory methods that yield BagOStuff instances. Site admins should make sure the configuration for those factory methods matches their access scope. BagOStuff subclasses have widely varying levels of support for replication features.

For any given instance, methods like lock(), unlock(), merge(), and set() with WRITE_SYNC should semantically operate over its entire access scope; any nodes/threads in that scope should serialize appropriately when using them. Likewise, a call to get() with READ_LATEST from one node in its access scope should reflect the prior changes of any other node its access scope. Any get() should reflect the changes of any prior set() with WRITE_SYNC.

Definition at line 58 of file BagOStuff.php.

Constructor & Destructor Documentation

◆ __construct()

BagOStuff::__construct ( array  $params = [])

$params include:

  • logger: Psr\Log\LoggerInterface instance
  • keyspace: Default keyspace for $this->makeKey()
  • asyncHandler: Callable to use for scheduling tasks after the web request ends. In CLI mode, it should run the task immediately.
  • reportDupes: Whether to emit warning log messages for all keys that were requested more than once (requires an asyncHandler).
  • syncTimeout: How long to wait with WRITE_SYNC in seconds.
    Parameters
    array$params

Definition at line 108 of file BagOStuff.php.

References $params, null, and setLogger().

Member Function Documentation

◆ add()

BagOStuff::add (   $key,
  $value,
  $exptime = 0,
  $flags = 0 
)
abstract

Insert an item if it does not already exist.

Parameters
string$key
mixed$value
int$exptime
int$flagsBitfield of BagOStuff::WRITE_* constants (since 1.33)
Returns
bool Success

Referenced by incrWithInit(), lock(), mergeViaCas(), and trackDuplicateKeys().

◆ addBusyCallback()

BagOStuff::addBusyCallback ( callable  $workCallback)

Let a callback be run to avoid wasting time on special blocking calls.

The callbacks may or may not be called ever, in any particular order. They are likely to be invoked when something WRITE_SYNC is used used. They should follow a caching pattern as shown below, so that any code using the work will get it's result no matter what happens.

$workCallback = function () use ( &$result ) {
if ( !$result ) {
$result = ....
}
return $result;
}
Parameters
callable$workCallback
Since
1.28

Definition at line 673 of file BagOStuff.php.

Referenced by Wikimedia\Rdbms\ChronologyProtector\shutdown().

◆ cas()

BagOStuff::cas (   $casToken,
  $key,
  $value,
  $exptime = 0,
  $flags = 0 
)
protected

Check and set an item.

Parameters
mixed$casToken
string$key
mixed$value
int$exptimeEither an interval in seconds or a unix timestamp for expiry
int$flagsBitfield of BagOStuff::WRITE_* constants
Returns
bool Success
Exceptions
Exception

Definition at line 343 of file BagOStuff.php.

References $success, $value, doGet(), lock(), null, and unlock().

Referenced by mergeViaCas().

◆ changeTTL()

BagOStuff::changeTTL (   $key,
  $expiry = 0,
  $flags = 0 
)

Change the expiration on a key if it exists.

If an expiry in the past is given then the key will immediately be expired

Parameters
string$key
int$expiryTTL or UNIX timestamp
int$flagsBitfield of BagOStuff::WRITE_* constants (since 1.33)
Returns
bool Success Returns false on failure or if the item does not exist
Since
1.28

Definition at line 377 of file BagOStuff.php.

References $cache, false, merge(), and use.

◆ clearLastError()

BagOStuff::clearLastError ( )

Clear the "last error" registry.

Since
1.23

Definition at line 640 of file BagOStuff.php.

Referenced by incrWithInit(), lock(), and mergeViaCas().

◆ convertToExpiry()

BagOStuff::convertToExpiry (   $exptime)
protected

Convert an optionally relative time to an absolute time.

Parameters
int$exptime
Returns
int

Definition at line 701 of file BagOStuff.php.

References expiryIsRelative(), and getCurrentTime().

Referenced by SqlBagOStuff\cas(), RedisBagOStuff\changeTTL(), SqlBagOStuff\changeTTL(), SqlBagOStuff\insertMulti(), and HashBagOStuff\set().

◆ convertToRelative()

BagOStuff::convertToRelative (   $exptime)
protected

Convert an optionally absolute expiry time to a relative time.

If an absolute time is specified which is in the past, use a short expiry time.

Parameters
int$exptime
Returns
int

Definition at line 716 of file BagOStuff.php.

References getCurrentTime().

Referenced by RedisBagOStuff\add(), RedisBagOStuff\changeTTL(), RedisBagOStuff\set(), and RedisBagOStuff\setMulti().

◆ debug()

BagOStuff::debug (   $text)
protected

◆ decr()

BagOStuff::decr (   $key,
  $value = 1 
)

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

Parameters
string$key
int$valueValue to subtract from $key (default: 1) [optional]
Returns
int|bool New value or false on failure

Definition at line 596 of file BagOStuff.php.

References incr().

◆ delete()

BagOStuff::delete (   $key,
  $flags = 0 
)
abstract

Delete an item.

Parameters
string$key
Returns
bool True if the item was deleted or not found, false on failure
Parameters
int$flagsBitfield of BagOStuff::WRITE_* constants

◆ deleteMulti()

BagOStuff::deleteMulti ( array  $keys,
  $flags = 0 
)

Batch deletion.

Parameters
string[]$keys List of keys
int$flagsBitfield of BagOStuff::WRITE_* constants
Returns
bool Success
Since
1.33

Definition at line 573 of file BagOStuff.php.

References $res, as, and incr().

◆ deleteObjectsExpiringBefore()

BagOStuff::deleteObjectsExpiringBefore (   $date,
  $progressCallback = false 
)

Delete all objects expiring before a certain date.

Parameters
string$dateThe reference date in MW format
callable | bool$progressCallbackOptional, a function which will be called regularly during long-running operations with the percentage progress as the first parameter.
Returns
bool Success, false if unimplemented

Definition at line 524 of file BagOStuff.php.

◆ doGet()

BagOStuff::doGet (   $key,
  $flags = 0,
$casToken = null 
)
abstractprotected
Parameters
string$key
int$flagsBitfield of BagOStuff::READ_* constants [optional]
mixed | null&$casTokenToken to use for check-and-set comparisons
Returns
mixed Returns false on failure or if the item does not exist

Referenced by cas(), get(), mergeViaCas(), and trackDuplicateKeys().

◆ expiryIsRelative()

BagOStuff::expiryIsRelative (   $exptime)
protected
Parameters
int$exptime
Returns
bool

Definition at line 692 of file BagOStuff.php.

Referenced by RedisBagOStuff\changeTTL(), and convertToExpiry().

◆ get()

BagOStuff::get (   $key,
  $flags = 0 
)

Get an item with the given key.

If the key includes a deterministic input hash (e.g. the key can only have the correct value) or complete staleness checks are handled by the caller (e.g. nothing relies on the TTL), then the READ_VERIFIED flag should be set. This lets tiered backends know they can safely upgrade a cached value to higher tiers using standard TTLs.

Parameters
string$key
int$flagsBitfield of BagOStuff::READ_* constants [optional]
Returns
mixed Returns false on failure or if the item does not exist

Definition at line 180 of file BagOStuff.php.

References doGet(), and trackDuplicateKeys().

Referenced by Wikimedia\Rdbms\ChronologyProtector\shutdown(), and BagOStuffTest\testReportDupes().

◆ getCurrentTime()

BagOStuff::getCurrentTime ( )
protected
Returns
float UNIX timestamp

Definition at line 812 of file BagOStuff.php.

Referenced by convertToExpiry(), convertToRelative(), HashBagOStuff\expire(), and getScopedLock().

◆ getLastError()

BagOStuff::getLastError ( )

Get the "last error" registered; clearLastError() should be called manually.

Returns
int ERR_* constant for the "last error" registry
Since
1.23

Definition at line 632 of file BagOStuff.php.

References $lastError.

Referenced by incrWithInit(), lock(), and mergeViaCas().

◆ getMulti()

BagOStuff::getMulti ( array  $keys,
  $flags = 0 
)

Get an associative array containing the item for each of the keys that have items.

Parameters
string[]$keys List of keys
int$flagsBitfield; supports READ_LATEST [optional]
Returns
array

Definition at line 535 of file BagOStuff.php.

References $res, and as.

◆ getQoS()

BagOStuff::getQoS (   $flag)
Parameters
int$flagATTR_* class constant
Returns
int QOS_* class constant
Since
1.28

Definition at line 783 of file BagOStuff.php.

Referenced by MWLBFactory\injectObjectCaches(), and Wikimedia\Rdbms\ChronologyProtector\shutdown().

◆ getScopedLock()

BagOStuff::getScopedLock (   $key,
  $timeout = 6,
  $expiry = 30,
  $rclass = '' 
)
final

Get a lightweight exclusive self-unlocking lock.

Note that the same lock cannot be acquired twice.

This is useful for task de-duplication or to avoid obtrusive (though non-corrupting) DB errors like INSERT key conflicts or deadlocks when using LOCK IN SHARE MODE.

Parameters
string$key
int$timeoutLock wait timeout; 0 for non-blocking [optional]
int$expiryLock expiry [optional]; 1 day maximum
string$rclassAllow reentry if set and the current lock used this value
Returns
ScopedCallback|null Returns null on failure
Since
1.26

Definition at line 492 of file BagOStuff.php.

References getCurrentTime(), lock(), null, unlock(), and use.

◆ getWithSetCallback()

BagOStuff::getWithSetCallback (   $key,
  $ttl,
  $callback,
  $flags = 0 
)
final

Get an item with the given key, regenerating and setting it if not found.

Nothing is stored nor deleted if the callback returns false

Parameters
string$key
int$ttlTime-to-live (seconds)
callable$callbackCallback that derives the new value
int$flagsBitfield of BagOStuff::READ_* or BagOStuff::WRITE_* constants [optional]
Returns
mixed The cached value if found or the result of $callback otherwise
Since
1.27

Definition at line 151 of file BagOStuff.php.

References $value.

◆ incr()

BagOStuff::incr (   $key,
  $value = 1 
)
abstract

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

Parameters
string$keyKey to increase
int$valueValue to add to $key (default: 1) [optional]
Returns
int|bool New value or false on failure

Referenced by decr(), deleteMulti(), and incrWithInit().

◆ incrWithInit()

BagOStuff::incrWithInit (   $key,
  $ttl,
  $value = 1,
  $init = 1 
)

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

This will create the key with value $init and TTL $ttl instead if not present

Parameters
string$key
int$ttl
int$value
int$init
Returns
int|bool New value or false on failure
Since
1.24

Definition at line 612 of file BagOStuff.php.

References add(), clearLastError(), getLastError(), and incr().

◆ isInteger()

BagOStuff::isInteger (   $value)
protected

Check if a value is an integer.

Parameters
mixed$value
Returns
bool

Definition at line 734 of file BagOStuff.php.

Referenced by HashBagOStuff\incr(), WinCacheBagOStuff\incr(), RESTBagOStuff\incr(), APCBagOStuff\serialize(), APCUBagOStuff\serialize(), APCBagOStuff\unserialize(), and APCUBagOStuff\unserialize().

◆ lock()

BagOStuff::lock (   $key,
  $timeout = 6,
  $expiry = 6,
  $rclass = '' 
)

Acquire an advisory lock on a key string.

Note that if reentry is enabled, duplicate calls ignore $expiry

Parameters
string$key
int$timeoutLock wait timeout; 0 for non-blocking [optional]
int$expiryLock expiry [optional]; 1 day maximum
string$rclassAllow reentry if set and the current lock used this value
Returns
bool Success

Definition at line 406 of file BagOStuff.php.

References $code, $fname, add(), clearLastError(), getLastError(), and use.

Referenced by cas(), getScopedLock(), and Wikimedia\Rdbms\ChronologyProtector\shutdown().

◆ makeGlobalKey()

BagOStuff::makeGlobalKey (   $class,
  $component = null 
)

Make a global cache key.

Since
1.27
Parameters
string$classKey class
string | null$component[optional] Key component (starting with a key collection name)
Returns
string Colon-delimited list of $keyspace followed by escaped components of $args

Definition at line 762 of file BagOStuff.php.

References makeKeyInternal().

Referenced by Wikimedia\Rdbms\ChronologyProtector\__construct(), Wikimedia\Rdbms\ChronologyProtector\getTouchedKey(), and BagOStuffTest\testMakeKey().

◆ makeKey()

BagOStuff::makeKey (   $class,
  $component = null 
)

Make a cache key, scoped to this instance's keyspace.

Since
1.27
Parameters
string$classKey class
string | null$component[optional] Key component (starting with a key collection name)
Returns
string Colon-delimited list of $keyspace followed by escaped components of $args

Definition at line 774 of file BagOStuff.php.

References makeKeyInternal().

Referenced by CryptHKDF\__construct(), FileCacheBase\cacheMissKey(), SiteStatsUpdate\getTypeCacheKey(), and BagOStuffTest\testMakeKey().

◆ makeKeyInternal()

BagOStuff::makeKeyInternal (   $keyspace,
  $args 
)

Construct a cache key.

Since
1.27
Parameters
string$keyspace
array$args
Returns
string Colon-delimited list of $keyspace followed by escaped components of $args

Definition at line 746 of file BagOStuff.php.

References $args, $keyspace, and as.

Referenced by makeGlobalKey(), makeKey(), and BagOStuffTest\testMakeKey().

◆ merge()

BagOStuff::merge (   $key,
callable  $callback,
  $exptime = 0,
  $attempts = 10,
  $flags = 0 
)

Merge changes into the existing cache value (possibly creating a new one)

The callback function returns the new value given the current value (which will be false if not present), and takes the arguments: (this BagOStuff, cache key, current value, TTL). The TTL parameter is reference set to $exptime. It can be overriden in the callback. Nothing is stored nor deleted if the callback returns false.

Parameters
string$key
callable$callbackCallback method to be executed
int$exptimeEither an interval in seconds or a unix timestamp for expiry
int$attemptsThe amount of times to attempt a merge in case of failure
int$flagsBitfield of BagOStuff::WRITE_* constants
Returns
bool Success
Exceptions
InvalidArgumentException

Definition at line 275 of file BagOStuff.php.

References mergeViaCas().

Referenced by changeTTL().

◆ mergeFlagMaps()

BagOStuff::mergeFlagMaps ( array  $bags)
protected

Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map.

Parameters
BagOStuff[]$bags
Returns
int[] Resulting flag map (class ATTR_* constant => class QOS_* constant)

Definition at line 793 of file BagOStuff.php.

References as.

Referenced by ReplicatedBagOStuff\__construct(), and MultiWriteBagOStuff\__construct().

◆ mergeViaCas()

BagOStuff::mergeViaCas (   $key,
  $callback,
  $exptime = 0,
  $attempts = 10,
  $flags = 0 
)
protected
See also
BagOStuff::merge()
Parameters
string$key
callable$callbackCallback method to be executed
int$exptimeEither an interval in seconds or a unix timestamp for expiry
int$attemptsThe amount of times to attempt a merge in case of failure
int$flagsBitfield of BagOStuff::WRITE_* constants
Returns
bool Success

Definition at line 289 of file BagOStuff.php.

References $success, add(), cas(), clearLastError(), doGet(), false, getLastError(), and null.

Referenced by merge(), and SqlBagOStuff\merge().

◆ set()

BagOStuff::set (   $key,
  $value,
  $exptime = 0,
  $flags = 0 
)
abstract

Set an item.

Parameters
string$key
mixed$value
int$exptimeEither an interval in seconds or a unix timestamp for expiry
int$flagsBitfield of BagOStuff::WRITE_* constants
Returns
bool Success

Referenced by Wikimedia\Rdbms\ChronologyProtector\shutdown(), and BagOStuffTest\testMerge().

◆ setDebug()

BagOStuff::setDebug (   $bool)
Parameters
bool$bool

Definition at line 135 of file BagOStuff.php.

◆ setLastError()

BagOStuff::setLastError (   $err)
protected

Set the "last error" registry.

Parameters
int$errERR_* constant
Since
1.23

Definition at line 649 of file BagOStuff.php.

Referenced by MemcachedPeclBagOStuff\checkResult(), RedisBagOStuff\getConnection(), RESTBagOStuff\handleError(), RedisBagOStuff\handleException(), and SqlBagOStuff\setAndLogDBError().

◆ setLogger()

BagOStuff::setLogger ( LoggerInterface  $logger)
Parameters
LoggerInterface$logger
Returns
void

Definition at line 128 of file BagOStuff.php.

References $logger.

Referenced by __construct().

◆ setMockTime()

BagOStuff::setMockTime ( $time)
Parameters
float | null&$timeMock UNIX timestamp for testing

Definition at line 820 of file BagOStuff.php.

References $time.

Referenced by MediaWiki\Tests\Storage\NameTableStoreTest\testGetName().

◆ setMulti()

BagOStuff::setMulti ( array  $data,
  $exptime = 0,
  $flags = 0 
)

Batch insertion/replace.

Parameters
mixed[]$data Map of (key => value)
int$exptimeEither an interval in seconds or a unix timestamp for expiry
int$flagsBitfield of BagOStuff::WRITE_* constants (since 1.33)
Returns
bool Success
Since
1.24

Definition at line 555 of file BagOStuff.php.

References $res, and as.

◆ trackDuplicateKeys()

BagOStuff::trackDuplicateKeys (   $key)
private

Track the number of times that a given key has been used.

Parameters
string$key

Definition at line 190 of file BagOStuff.php.

References $value, add(), as, doGet(), and null.

Referenced by get().

◆ unlock()

BagOStuff::unlock (   $key)

Release an advisory lock on a key string.

Parameters
string$key
Returns
bool Success

Definition at line 458 of file BagOStuff.php.

Referenced by cas(), getScopedLock(), and Wikimedia\Rdbms\ChronologyProtector\shutdown().

Member Data Documentation

◆ $asyncHandler

callable null BagOStuff::$asyncHandler
protected

Definition at line 68 of file BagOStuff.php.

Referenced by MultiWriteBagOStuff\doWrite().

◆ $attrMap

int [] BagOStuff::$attrMap = []
protected

Map of (ATTR_* class constant => QOS_* class constant)

Definition at line 88 of file BagOStuff.php.

◆ $busyCallbacks

callable [] BagOStuff::$busyCallbacks = []
protected

Definition at line 82 of file BagOStuff.php.

Referenced by SqlBagOStuff\waitForReplication().

◆ $debugMode

bool BagOStuff::$debugMode = false
private

Definition at line 73 of file BagOStuff.php.

◆ $dupeTrackScheduled

bool BagOStuff::$dupeTrackScheduled = false
private

Definition at line 79 of file BagOStuff.php.

◆ $duplicateKeyLookups

array BagOStuff::$duplicateKeyLookups = []
private

Definition at line 75 of file BagOStuff.php.

◆ $keyspace

string BagOStuff::$keyspace = 'local'
protected

◆ $lastError

int BagOStuff::$lastError = self::ERR_NONE
protected

ERR_* class constant.

Definition at line 62 of file BagOStuff.php.

Referenced by getLastError().

◆ $locks

array [] BagOStuff::$locks = []
protected

Lock tracking.

Definition at line 60 of file BagOStuff.php.

◆ $logger

LoggerInterface BagOStuff::$logger
protected

Definition at line 66 of file BagOStuff.php.

Referenced by MultiWriteBagOStuff\doWrite(), and setLogger().

◆ $reportDupes

bool BagOStuff::$reportDupes = false
private

Definition at line 77 of file BagOStuff.php.

◆ $syncTimeout

int BagOStuff::$syncTimeout
protected

Seconds.

Definition at line 70 of file BagOStuff.php.

◆ $wallClockOverride

float null BagOStuff::$wallClockOverride
private

Definition at line 85 of file BagOStuff.php.

◆ READ_LATEST

const BagOStuff::READ_LATEST = 1

Bitfield constants for get()/getMulti()

Definition at line 91 of file BagOStuff.php.

Referenced by SiteStatsUpdate\getPendingDeltas().

◆ READ_VERIFIED

const BagOStuff::READ_VERIFIED = 2

Definition at line 92 of file BagOStuff.php.

Referenced by ParserCache\get(), and ParserCache\getKey().

◆ WRITE_CACHE_ONLY

const BagOStuff::WRITE_CACHE_ONLY = 8

◆ WRITE_SYNC

const BagOStuff::WRITE_SYNC = 4

Bitfield constants for set()/merge()

Definition at line 94 of file BagOStuff.php.

Referenced by MediaWiki\Session\SessionBackend\save(), and MultiWriteBagOStuffTest\testSyncMerge().


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