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Public Member Functions | Public Attributes | Protected Member Functions | Protected Attributes | Private Member Functions | Private Attributes | List of all members
BagOStuff Class Reference
Cache

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

Inheritance diagram for BagOStuff:
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Collaboration diagram for BagOStuff:
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Public Member Functions

 __construct (array $params=[])
 $params include:
 
 add ( $key, $value, $exptime=0)
 
 addBusyCallback (callable $workCallback)
 Let a callback be run to avoid wasting time on special blocking calls.
 
 changeTTL ( $key, $expiry=0)
 Reset the TTL on a key if it exists.
 
 clearLastError ()
 Clear the "last error" registry.
 
 decr ( $key, $value=1)
 Decrease stored value of $key by $value while preserving its TTL.
 
 delete ( $key)
 Delete an item.
 
 deleteObjectsExpiringBefore ( $date, $progressCallback=false)
 Delete all objects expiring before a certain date.
 
 get ( $key, $flags=0, $oldFlags=null)
 Get an item with the given key.
 
 getLastError ()
 Get the "last error" registered; clearLastError() should be called manually.
 
 getMulti (array $keys, $flags=0)
 Get an associative array containing the item for each of the keys that have items.
 
 getQoS ( $flag)
 
 getScopedLock ( $key, $timeout=6, $expiry=30, $rclass='')
 Get a lightweight exclusive self-unlocking lock.
 
 getWithSetCallback ( $key, $ttl, $callback, $flags=0)
 Get an item with the given key, regenerating and setting it if not found.
 
 incr ( $key, $value=1)
 Increase stored value of $key by $value while preserving its TTL.
 
 incrWithInit ( $key, $ttl, $value=1, $init=1)
 Increase stored value of $key by $value while preserving its TTL.
 
 lock ( $key, $timeout=6, $expiry=6, $rclass='')
 Acquire an advisory lock on a key string.
 
 makeGlobalKey ( $class, $component=null)
 Make a global cache key.
 
 makeKey ( $class, $component=null)
 Make a cache key, scoped to this instance's keyspace.
 
 makeKeyInternal ( $keyspace, $args)
 Construct a cache key.
 
 merge ( $key, callable $callback, $exptime=0, $attempts=10, $flags=0)
 Merge changes into the existing cache value (possibly creating a new one)
 
 modifySimpleRelayEvent (array $event)
 Modify a cache update operation array for EventRelayer::notify()
 
 set ( $key, $value, $exptime=0, $flags=0)
 Set an item.
 
 setDebug ( $bool)
 
 setLogger (LoggerInterface $logger)
 
 setMockTime (&$time)
 
 setMulti (array $data, $exptime=0)
 Batch insertion.
 
 unlock ( $key)
 Release an advisory lock on a key string.
 

Public Attributes

const ERR_NO_RESPONSE = 1
 
const ERR_NONE = 0
 Possible values for getLastError()
 
const ERR_UNEXPECTED = 3
 
const ERR_UNREACHABLE = 2
 
const READ_LATEST = 1
 Bitfield constants for get()/getMulti()
 
const READ_VERIFIED = 2
 
const WRITE_CACHE_ONLY = 2
 
const WRITE_SYNC = 1
 Bitfield constants for set()/merge()
 
- Public Attributes inherited from IExpiringStore
const ATTR_EMULATION = 1
 
const ATTR_SYNCWRITES = 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)
 Check and set an item.
 
 convertExpiry ( $exptime)
 Convert an optionally relative time to an absolute time.
 
 convertToRelative ( $exptime)
 Convert an optionally absolute expiry time to a relative time.
 
 debug ( $text)
 
 doGet ( $key, $flags=0)
 
 getCurrentTime ()
 
 getWithToken ( $key, &$casToken, $flags=0)
 
 isInteger ( $value)
 Check if a value is an integer.
 
 mergeFlagMaps (array $bags)
 Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map.
 
 mergeViaCas ( $key, $callback, $exptime=0, $attempts=10)
 
 mergeViaLock ( $key, $callback, $exptime=0, $attempts=10, $flags=0)
 
 setLastError ( $err)
 Set the "last error" registry.
 

Protected Attributes

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

Private Member Functions

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

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

Reimplemented in MemcachedBagOStuff, APCBagOStuff, and APCUBagOStuff.

Definition at line 114 of file BagOStuff.php.

References $params, and setLogger().

Member Function Documentation

◆ add()

BagOStuff::add (   $key,
  $value,
  $exptime = 0 
)
Parameters
string$key
mixed$value
int$exptime
Returns
bool Success

Reimplemented in EmptyBagOStuff, RedisBagOStuff, MemcachedBagOStuff, MemcachedPeclBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 618 of file BagOStuff.php.

References $value.

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

◆ 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 word will get it's result no matter what happens.

$result = null;
$workCallback = function () use ( &$result ) {
if ( !$result ) {
$result = ....
}
return $result;
}
$result
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImgAuthModifyHeaders':Executed just before a file is streamed to a user via img_auth.php, allowing headers to be modified beforehand. $title:LinkTarget object & $headers:HTTP headers(name=> value, names are case insensitive). Two headers get special handling:If-Modified-Since(value must be a valid HTTP date) and Range(must be of the form "bytes=(\d*-\d*)") will be honored when streaming the file. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUnknownUser':When a user doesn 't exist locally, this hook is called to give extensions an opportunity to auto-create it. If the auto-creation is successful, return false. $name:User name 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetMagic':DEPRECATED since 1.16! Use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language & $magicExtensions:associative array of magic words synonyms $lang:language code(string) 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetSpecialPageAliases':DEPRECATED! Use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language & $specialPageAliases:associative array of magic words synonyms $lang:language code(string) 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Array with elements of the form "language:title" in the order that they will be output. & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED since 1.28! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition hooks.txt:2042
Parameters
callable$workCallback
Since
1.28

Definition at line 731 of file BagOStuff.php.

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

◆ cas()

BagOStuff::cas (   $casToken,
  $key,
  $value,
  $exptime = 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
Returns
bool Success
Exceptions
Exception

Reimplemented in MemcachedBagOStuff, MemcachedPeclBagOStuff, and SqlBagOStuff.

Definition at line 355 of file BagOStuff.php.

References $success, $value, getWithToken(), lock(), and unlock().

Referenced by mergeViaCas().

◆ changeTTL()

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

Reset the TTL on a key if it exists.

Parameters
string$key
int$expiry
Returns
bool Success Returns false if there is no key
Since
1.28

Reimplemented in MemcachedPeclBagOStuff, RedisBagOStuff, SqlBagOStuff, and MemcachedBagOStuff.

Definition at line 438 of file BagOStuff.php.

References $value, and false.

◆ clearLastError()

BagOStuff::clearLastError ( )

Clear the "last error" registry.

Since
1.23

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 698 of file BagOStuff.php.

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

◆ convertExpiry()

BagOStuff::convertExpiry (   $exptime)
protected

Convert an optionally relative time to an absolute time.

Parameters
int$exptime
Returns
int

Definition at line 769 of file BagOStuff.php.

References getCurrentTime().

Referenced by SqlBagOStuff\cas(), HashBagOStuff\set(), and SqlBagOStuff\setMulti().

◆ 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 784 of file BagOStuff.php.

References getCurrentTime().

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

◆ debug()

BagOStuff::debug (   $text)
protected
Parameters
string$text

Definition at line 756 of file BagOStuff.php.

Referenced by RedisBagOStuff\getMulti(), SqlBagOStuff\getMulti(), RedisBagOStuff\logRequest(), and RedisBagOStuff\setMulti().

◆ decr()

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

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

Parameters
string$key
int$value
Returns
int|bool New value or false on failure

Reimplemented in APCBagOStuff, APCUBagOStuff, MemcachedPeclBagOStuff, MemcachedPhpBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 654 of file BagOStuff.php.

References $value, and incr().

◆ delete()

BagOStuff::delete (   $key)
abstract

Delete an item.

Parameters
string$key
Returns
bool True if the item was deleted or not found, false on failure

Reimplemented in APCBagOStuff, APCUBagOStuff, EmptyBagOStuff, HashBagOStuff, MemcachedBagOStuff, MemcachedPeclBagOStuff, MultiWriteBagOStuff, RedisBagOStuff, ReplicatedBagOStuff, RESTBagOStuff, WinCacheBagOStuff, and SqlBagOStuff.

◆ 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

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and SqlBagOStuff.

Definition at line 573 of file BagOStuff.php.

◆ doGet()

BagOStuff::doGet (   $key,
  $flags = 0 
)
abstractprotected
Parameters
string$key
int$flagsBitfield of BagOStuff::READ_* constants [optional]
Returns
mixed Returns false on failure and if the item does not exist

Reimplemented in APCBagOStuff, APCUBagOStuff, CachedBagOStuff, EmptyBagOStuff, HashBagOStuff, MemcachedBagOStuff, MultiWriteBagOStuff, RedisBagOStuff, ReplicatedBagOStuff, RESTBagOStuff, WinCacheBagOStuff, and SqlBagOStuff.

Referenced by get().

◆ get()

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

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]
int | null$oldFlags[unused]
Returns
mixed Returns false on failure and if the item does not exist

Definition at line 191 of file BagOStuff.php.

References doGet(), and trackDuplicateKeys().

Referenced by MediaWiki\Session\SessionBackend\__construct(), Wikimedia\Rdbms\ChronologyProtector\shutdown(), and BagOStuffTest\testReportDupes().

◆ getCurrentTime()

BagOStuff::getCurrentTime ( )
protected
Returns
float UNIX timestamp

Definition at line 881 of file BagOStuff.php.

Referenced by convertExpiry(), 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

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 690 of file BagOStuff.php.

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

◆ getMulti()

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

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

Parameters
array$keysList of strings
int$flagsBitfield; supports READ_LATEST [optional]
Returns
array

Reimplemented in MemcachedPeclBagOStuff, MemcachedPhpBagOStuff, RedisBagOStuff, ReplicatedBagOStuff, and SqlBagOStuff.

Definition at line 584 of file BagOStuff.php.

References $keys, $res, and as.

◆ getQoS()

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

Definition at line 852 of file BagOStuff.php.

Referenced by 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 541 of file BagOStuff.php.

References getCurrentTime(), lock(), 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.

If the callback returns false, then nothing is stored.

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

Definition at line 161 of file BagOStuff.php.

References $value.

◆ getWithToken()

BagOStuff::getWithToken (   $key,
&  $casToken,
  $flags = 0 
)
protected
Note
This method is only needed if merge() uses mergeViaCas()
Parameters
string$key
mixed&$casToken
int$flagsBitfield of BagOStuff::READ_* constants [optional]
Returns
mixed Returns false on failure and if the item does not exist
Exceptions
Exception

Reimplemented in MemcachedBagOStuff, MemcachedPeclBagOStuff, RedisBagOStuff, and SqlBagOStuff.

Definition at line 249 of file BagOStuff.php.

Referenced by cas(), and mergeViaCas().

◆ incr()

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

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

Parameters
string$keyKey to increase
int$valueValue to add to $key (Default 1)
Returns
int|bool New value or false on failure

Reimplemented in SqlBagOStuff, APCBagOStuff, APCUBagOStuff, MemcachedPeclBagOStuff, MemcachedPhpBagOStuff, MultiWriteBagOStuff, RedisBagOStuff, and ReplicatedBagOStuff.

Definition at line 632 of file BagOStuff.php.

References $value, isInteger(), lock(), and unlock().

Referenced by decr(), 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 670 of file BagOStuff.php.

References $value, 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 802 of file BagOStuff.php.

References $value.

Referenced by APCBagOStuff\getUnserialize(), incr(), and APCBagOStuff\setSerialize().

◆ 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

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 455 of file BagOStuff.php.

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

Referenced by cas(), getScopedLock(), incr(), mergeViaLock(), 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

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 831 of file BagOStuff.php.

References makeKeyInternal().

Referenced by Wikimedia\Rdbms\ChronologyProtector\__construct(), Wikimedia\Rdbms\DatabaseMysqlBase\getMasterServerInfo(), 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

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 843 of file BagOStuff.php.

References makeKeyInternal().

Referenced by 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

Reimplemented in CachedBagOStuff, MemcachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 814 of file BagOStuff.php.

References $args, 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.

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

Reimplemented in EmptyBagOStuff, MemcachedBagOStuff, MultiWriteBagOStuff, RedisBagOStuff, ReplicatedBagOStuff, WinCacheBagOStuff, and SqlBagOStuff.

Definition at line 288 of file BagOStuff.php.

References mergeViaLock().

◆ 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 862 of file BagOStuff.php.

References as.

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

◆ mergeViaCas()

BagOStuff::mergeViaCas (   $key,
  $callback,
  $exptime = 0,
  $attempts = 10 
)
protected
See also
BagOStuff::merge()
Parameters
string$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
Returns
bool Success

Definition at line 301 of file BagOStuff.php.

References $success, $value, add(), cas(), clearLastError(), getLastError(), and getWithToken().

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

◆ mergeViaLock()

BagOStuff::mergeViaLock (   $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 388 of file BagOStuff.php.

References $success, $value, clearLastError(), getLastError(), lock(), and unlock().

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

◆ modifySimpleRelayEvent()

BagOStuff::modifySimpleRelayEvent ( array  $event)

Modify a cache update operation array for EventRelayer::notify()

This is used for relayed writes, e.g. for broadcasting a change to multiple data-centers. If the array contains a 'val' field then the command involves setting a key to that value. Note that for simplicity, 'val' is always a simple scalar value. This method is used to possibly serialize the value and add any cache-specific key/values needed for the relayer daemon (e.g. memcached flags).

Parameters
array$event
Returns
array
Since
1.26

Reimplemented in CachedBagOStuff, MemcachedBagOStuff, and RedisBagOStuff.

Definition at line 749 of file BagOStuff.php.

◆ 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

Reimplemented in EmptyBagOStuff, WinCacheBagOStuff, RedisBagOStuff, APCBagOStuff, APCUBagOStuff, CachedBagOStuff, HashBagOStuff, MemcachedBagOStuff, MemcachedPeclBagOStuff, MultiWriteBagOStuff, ReplicatedBagOStuff, RESTBagOStuff, and SqlBagOStuff.

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

◆ setDebug()

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

Reimplemented in CachedBagOStuff, MemcachedPhpBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 145 of file BagOStuff.php.

◆ setLastError()

BagOStuff::setLastError (   $err)
protected

Set the "last error" registry.

Parameters
int$errERR_* constant
Since
1.23

Definition at line 707 of file BagOStuff.php.

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

◆ setLogger()

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

Reimplemented in RESTBagOStuff.

Definition at line 138 of file BagOStuff.php.

Referenced by __construct().

◆ setMockTime()

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

Definition at line 889 of file BagOStuff.php.

References $time.

◆ setMulti()

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

Batch insertion.

Parameters
array$data$key => $value assoc array
int$exptimeEither an interval in seconds or a unix timestamp for expiry
Returns
bool Success
Since
1.24

Reimplemented in RedisBagOStuff, SqlBagOStuff, and MemcachedPeclBagOStuff.

Definition at line 602 of file BagOStuff.php.

References $res, $value, 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 204 of file BagOStuff.php.

References as.

Referenced by get().

◆ unlock()

BagOStuff::unlock (   $key)

Release an advisory lock on a key string.

Parameters
string$key
Returns
bool Success

Reimplemented in CachedBagOStuff, MultiWriteBagOStuff, and ReplicatedBagOStuff.

Definition at line 507 of file BagOStuff.php.

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

Member Data Documentation

◆ $asyncHandler

callback 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

Definition at line 64 of file BagOStuff.php.

Referenced by MemcachedBagOStuff\makeKeyInternal().

◆ $lastError

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

ERR_* class constant.

Definition at line 62 of file BagOStuff.php.

◆ $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 RESTBagOStuff\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.

◆ ERR_NO_RESPONSE

const BagOStuff::ERR_NO_RESPONSE = 1

Definition at line 92 of file BagOStuff.php.

◆ ERR_NONE

const BagOStuff::ERR_NONE = 0

Possible values for getLastError()

Definition at line 91 of file BagOStuff.php.

◆ ERR_UNEXPECTED

const BagOStuff::ERR_UNEXPECTED = 3

Definition at line 94 of file BagOStuff.php.

Referenced by MemcachedPeclBagOStuff\checkResult(), RESTBagOStuff\handleError(), RedisBagOStuff\handleException(), SqlBagOStuff\handleReadError(), and SqlBagOStuff\handleWriteError().

◆ ERR_UNREACHABLE

const BagOStuff::ERR_UNREACHABLE = 2

Definition at line 93 of file BagOStuff.php.

Referenced by RedisBagOStuff\getConnection(), SqlBagOStuff\handleReadError(), and SqlBagOStuff\handleWriteError().

◆ READ_LATEST

const BagOStuff::READ_LATEST = 1

Bitfield constants for get()/getMulti()

Definition at line 97 of file BagOStuff.php.

◆ READ_VERIFIED

const BagOStuff::READ_VERIFIED = 2

Definition at line 98 of file BagOStuff.php.

◆ WRITE_CACHE_ONLY

const BagOStuff::WRITE_CACHE_ONLY = 2

Definition at line 101 of file BagOStuff.php.

◆ WRITE_SYNC

const BagOStuff::WRITE_SYNC = 1

Bitfield constants for set()/merge()

Definition at line 100 of file BagOStuff.php.

Referenced by MultiWriteBagOStuff\merge(), and MultiWriteBagOStuff\set().

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