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HashBagOStuff Class Reference

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

Inheritance diagram for HashBagOStuff:
Collaboration diagram for HashBagOStuff:

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...
 
 setNewPreparedValues (array $valuesByKey)
 Prepare values for storage and get their serialized sizes, or, estimate those sizes. 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...
 
 clearLastError ()
 Clear the "last error" registry. More...
 
 delete ( $key, $flags=0)
 Delete an item. More...
 
 deleteMulti (array $keys, $flags=0)
 Batch deletion. More...
 
 deleteObjectsExpiringBefore ( $timestamp, callable $progress=null, $limit=INF)
 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)
 
 getSegmentationSize ()
 
 getSegmentedValueMaxSize ()
 
 incrWithInit ( $key, $exptime, $value=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, $expiry=6, $rclass='')
 Acquire an advisory lock on a key string. More...
 
 makeGlobalKey ( $class,... $components)
 Make a global cache key. More...
 
 makeKey ( $class,... $components)
 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...
 
 setMulti (array $data, $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
 getCurrentTime ()
 
 getLogger ()
 
 getScopedLock ( $key, $timeout=6, $expiry=30, $rclass='')
 Get a lightweight exclusive self-unlocking lock. More...
 
 getWithSetCallback ( $key, $exptime, $callback, $flags=0)
 Get an item with the given key, regenerating and setting it if not found. More...
 
 setDebug ( $enabled)
 
 setLogger (LoggerInterface $logger)
 
 setMockTime (&$time)
 

Public Attributes

const KEY_CAS = 2
 
const KEY_EXP = 1
 
const KEY_VAL = 0
 
- Public Attributes inherited from BagOStuff
const READ_LATEST = 1
 Bitfield constants for get()/getMulti(); these are only advisory. More...
 
const READ_VERIFIED = 2
 
const WRITE_ALLOW_SEGMENTS = 16
 
const WRITE_BACKGROUND = 64
 
const WRITE_CACHE_ONLY = 8
 
const WRITE_PRUNE_SEGMENTS = 32
 
const WRITE_SYNC = 4
 Bitfield constants for set()/merge(); these are only advisory. More...
 

Protected Member Functions

 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)
 
 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)
 Check and set an item. More...
 
 debug ( $text)
 
 doCas ( $casToken, $key, $value, $exptime=0, $flags=0)
 Check and set an item. More...
 
 doChangeTTL ( $key, $exptime, $flags)
 
 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...
 
 doSetMulti (array $data, $exptime=0, $flags=0)
 
 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, using any applicable prepared value. More...
 
 guessSerialValueSize ( $value, $depth=0, &$loops=0)
 Estimate the size of a variable once serialized. More...
 
 isInteger ( $value)
 Check if a value is an integer. More...
 
 isRelativeExpiration ( $exptime)
 
 makeValueOrSegmentList ( $key, $value, $exptime, $flags)
 Determine the entry (inline or segment list) to store under a key to save the value. 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)
 
 setLastError ( $err)
 Set the "last error" registry. More...
 
 unserialize ( $value)
 
- Protected Member Functions inherited from BagOStuff
 fieldHasFlags ( $field, $flags)
 
 mergeFlagMaps (array $bags)
 Merge the flag maps of one or more BagOStuff objects into a "lowest common denominator" map. More...
 

Protected Attributes

mixed[] $bag = []
 
int $maxCacheKeys
 Max entries allowed. More...
 
- Protected Attributes inherited from MediumSpecificBagOStuff
callable[] $busyCallbacks = []
 
string $keyspace = 'local'
 
int $lastError = self::ERR_NONE
 ERR_* class constant. More...
 
array[] $locks = []
 Lock tracking. More...
 
array[] $preparedValues = []
 Map of (key => (PHP variable value, serialized value)) More...
 
int $segmentationSize
 Bytes; chunk size of segmented cache values. More...
 
int $segmentedValueMaxSize
 Bytes; maximum total size of a segmented cache value. More...
 
int $syncTimeout
 Seconds. More...
 
- Protected Attributes inherited from BagOStuff
callable null $asyncHandler
 
int[] $attrMap = []
 Map of (ATTR_* class constant => QOS_* class constant) More...
 
bool $debugMode = false
 
LoggerInterface $logger
 

Private Attributes

string $token
 CAS token prefix for this instance. More...
 

Static Private Attributes

static int $casCounter = 0
 CAS token counter. 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.

Definition at line 31 of file HashBagOStuff.php.

Constructor & Destructor Documentation

◆ __construct()

HashBagOStuff::__construct (   $params = [])
Parameters
array$paramsAdditional parameters include:
  • maxKeys : only allow this many keys (using oldest-first eviction)

-param array{logger?:Psr\Log\LoggerInterface,asyncHandler?:callable,keyspace?:string,reportDupes?:bool,syncTimeout?:int,segmentationSize?:int,segmentedValueMaxSize?:int,maxKeys?:int} $params

Definition at line 54 of file HashBagOStuff.php.

Member Function Documentation

◆ clear()

HashBagOStuff::clear ( )

Clear all values in cache.

Definition at line 133 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$key
int$valueValue to subtract from $key (default: 1) [optional]
int$flagsBit field of class WRITE_* constants [optional]
Returns
int|bool New value or false on failure

Reimplemented from BagOStuff.

Definition at line 126 of file HashBagOStuff.php.

References incr().

◆ 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$exptime
int$flagsBitfield of BagOStuff::WRITE_* constants (since 1.33)
Returns
bool Success

Reimplemented from MediumSpecificBagOStuff.

Definition at line 100 of file HashBagOStuff.php.

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

◆ doDelete()

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

Delete an item.

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

Reimplemented from MediumSpecificBagOStuff.

Definition at line 108 of file HashBagOStuff.php.

Referenced by expire().

◆ doGet()

HashBagOStuff::doGet (   $key,
  $flags = 0,
$casToken = null 
)
protected
Parameters
string$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

Reimplemented from MediumSpecificBagOStuff.

Definition at line 65 of file HashBagOStuff.php.

References expire(), hasKey(), KEY_CAS, and KEY_VAL.

◆ doSet()

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

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 from MediumSpecificBagOStuff.

Definition at line 82 of file HashBagOStuff.php.

References $casCounter, and MediumSpecificBagOStuff\getExpirationAsTimestamp().

Referenced by doAdd().

◆ expire()

HashBagOStuff::expire (   $key)
protected
Parameters
string$key
Returns
bool

Definition at line 141 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 169 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$keyKey to increase
int$valueValue to add to $key (default: 1) [optional]
int$flagsBit field of class WRITE_* constants [optional]
Returns
int|bool New value or false on failure

Reimplemented from BagOStuff.

Definition at line 114 of file HashBagOStuff.php.

References MediumSpecificBagOStuff\isInteger(), and KEY_VAL.

Referenced by decr().

◆ setNewPreparedValues()

HashBagOStuff::setNewPreparedValues ( array  $valuesByKey)

Prepare values for storage and get their serialized sizes, or, estimate those sizes.

This is only useful if the caller needs an estimate of the serialized object sizes. The caller cannot know the serialization format and even if it did, it could be expensive to serialize complex values twice just to get the size information before writing them to cache. This method solves both problems by making the cache instance do the serialization and having it reuse the result when the cache write happens.

When using this method, the caller must invoke it for each value, in order, that will be passed to the next write cache instance. All previously prepared values are cleared.

Parameters
array$valuesByKeyMap of (cache key => PHP variable value to serialize)
Returns
int[]|null[] Corresponding serialized value size list (null for invalid values)
Since
1.35

Reimplemented from MediumSpecificBagOStuff.

Definition at line 152 of file HashBagOStuff.php.

References MediumSpecificBagOStuff\guessSerialValueSize().

Member Data Documentation

◆ $bag

mixed [] HashBagOStuff::$bag = []
protected

Definition at line 33 of file HashBagOStuff.php.

◆ $casCounter

int HashBagOStuff::$casCounter = 0
staticprivate

CAS token counter.

Definition at line 41 of file HashBagOStuff.php.

Referenced by doSet().

◆ $maxCacheKeys

int HashBagOStuff::$maxCacheKeys
protected

Max entries allowed.

Definition at line 35 of file HashBagOStuff.php.

◆ $token

string HashBagOStuff::$token
private

CAS token prefix for this instance.

Definition at line 38 of file HashBagOStuff.php.

◆ KEY_CAS

const HashBagOStuff::KEY_CAS = 2

Definition at line 45 of file HashBagOStuff.php.

Referenced by doGet().

◆ KEY_EXP

const HashBagOStuff::KEY_EXP = 1

Definition at line 44 of file HashBagOStuff.php.

Referenced by expire().

◆ KEY_VAL

const HashBagOStuff::KEY_VAL = 0

Definition at line 43 of file HashBagOStuff.php.

Referenced by doGet(), and incr().


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