Cache/Backend/Libmemcached.php

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Category
Zend  
Copyright
Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  
Package
Zend_Cache  
Subpackage
Zend_Cache_Backend  
Version
$Id$  

\Zend_Cache_Backend_Libmemcached

Package: Zend_Cache\Zend_Cache_Backend
Implements
Parent(s)
\Zend_Cache_Backend
Copyright
Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)  
License
New BSD License  

Constants

>VConstant  DEFAULT_HOST = '127.0.0.1'
Default Server Values
>VConstant  DEFAULT_PORT = 11211
>VConstant  DEFAULT_WEIGHT = 1
>VConstant  TAGS_UNSUPPORTED_BY_CLEAN_OF_LIBMEMCACHED_BACKEND = 'Zend_Cache_Backend_Libmemcached::clean() : tags are unsupported by the Libmemcached backend'
Log message
>VConstant  TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND = 'Zend_Cache_Backend_Libmemcached::save() : tags are unsupported by the Libmemcached backend'

Properties

>VPropertyprotectedmixed $_memcache = null
Memcached object
Default valuenullDetails
Type
mixed
>VPropertyprotectedarray $_options = array('servers' => array(array('host' => self::DEFAULT_HOST, 'port' => self::DEFAULT_PORT, 'weight' => self::DEFAULT_WEIGHT)), 'client' => array())
Available options
=====> (array) servers : an array of memcached server ; each memcached server is described by an associative array : 'host' => (string) : the name of the memcached server 'port' => (int) : the port of the memcached server 'weight' => (int) : number of buckets to create for this server which in turn control its probability of it being selected. The probability is relative to the total weight of all servers. =====> (array) client : an array of memcached client options ; the memcached client is described by an associative array :
Default valuearray('servers' => array(array('host' => self::DEFAULT_HOST, 'port' => self::DEFAULT_PORT, 'weight' => self::DEFAULT_WEIGHT)), 'client' => array())Details
Type
array
See
- The option name can be the name of the constant without the prefix 'OPT_' or the integer value of this option constant  

Methods

methodpublic__construct(array $options = array()) : void

Constructor

Parameters
NameTypeDescription
$optionsarray

associative array of options

Throws
ExceptionDescription
\Zend_Cache_Exception
methodpublicclean(string $mode = \Zend_Cache::CLEANING_MODE_ALL, array $tags = array()) : boolean

Clean some cache records

Available modes are : 'all' (default) => remove all cache entries ($tags is not used) 'old' => unsupported 'matchingTag' => unsupported 'notMatchingTag' => unsupported 'matchingAnyTag' => unsupported
Parameters
NameTypeDescription
$modestring

Clean mode

$tagsarray

Array of tags

Returns
TypeDescription
booleanTrue if no problem
Throws
ExceptionDescription
\Zend_Cache_Exception
methodpublicgetCapabilities() : array

Return an associative array of capabilities (booleans) of the backend

The array must include these keys : - automatic_cleaning (is automating cleaning necessary) - tags (are tags supported) - expired_read (is it possible to read expired cache records (for doNotTestCacheValidity option for example)) - priority does the backend deal with priority when saving - infinite_lifetime (is infinite lifetime can work with this backend) - get_list (is it possible to get the list of cache ids and the complete list of tags)
Returns
TypeDescription
arrayassociative of with capabilities
methodpublicgetFillingPercentage() : int

Return the filling percentage of the backend storage

Returns
TypeDescription
intinteger between 0 and 100
Throws
ExceptionDescription
\Zend_Cache_Exception
methodpublicgetIds() : array

Return an array of stored cache ids

Returns
TypeDescription
arrayarray of stored cache ids (string)
methodpublicgetIdsMatchingAnyTags(array $tags = array()) : array

Return an array of stored cache ids which match any given tags

In case of multiple tags, a logical AND is made between tags
Parameters
NameTypeDescription
$tagsarray

array of tags

Returns
TypeDescription
arrayarray of any matching cache ids (string)
methodpublicgetIdsMatchingTags(array $tags = array()) : array

Return an array of stored cache ids which match given tags

In case of multiple tags, a logical AND is made between tags
Parameters
NameTypeDescription
$tagsarray

array of tags

Returns
TypeDescription
arrayarray of matching cache ids (string)
methodpublicgetIdsNotMatchingTags(array $tags = array()) : array

Return an array of stored cache ids which don't match given tags

In case of multiple tags, a logical OR is made between tags
Parameters
NameTypeDescription
$tagsarray

array of tags

Returns
TypeDescription
arrayarray of not matching cache ids (string)
methodpublicgetMetadatas(string $id) : array

Return an array of metadatas for the given cache id

The array must include these keys : - expire : the expire timestamp - tags : a string array of tags - mtime : timestamp of last modification time
Parameters
NameTypeDescription
$idstring

cache id

Returns
TypeDescription
arrayarray of metadatas (false if the cache id is not found)
methodpublicgetTags() : array

Return an array of stored tags

Returns
TypeDescription
arrayarray of stored tags (string)
methodpublicisAutomaticCleaningAvailable() : boolean

Return true if the automatic cleaning is available for the backend

Returns
TypeDescription
boolean
methodpublicload(string $id, boolean $doNotTestCacheValidity = false) : string | false

Test if a cache is available for the given id and (if yes) return it (false else)

Parameters
NameTypeDescription
$idstring

Cache id

$doNotTestCacheValidityboolean

If set to true, the cache validity won't be tested

Returns
TypeDescription
string | falsecached datas
methodpublicremove(string $id) : boolean

Remove a cache record

Parameters
NameTypeDescription
$idstring

Cache id

Returns
TypeDescription
booleanTrue if no problem
methodpublicsave(string $data, string $id, array $tags = array(), int $specificLifetime = false) : boolean

Save some string datas into a cache record

Note : $data is always "string" (serialization is done by the core not by the backend)
Parameters
NameTypeDescription
$datastring

Datas to cache

$idstring

Cache id

$tagsarray

Array of strings, the cache record will be tagged by each string entry

$specificLifetimeint

If != false, set a specific lifetime for this cache record (null => infinite lifetime)

Returns
TypeDescription
booleanTrue if no problem
methodpublicsetDirectives(array $directives) : void

Set the frontend directives

Parameters
NameTypeDescription
$directivesarray

Assoc of directives

Throws
ExceptionDescription
\Zend_Cache_Exception
methodpublictest(string $id) : int | false

Test if a cache is available or not (for the given id)

Parameters
NameTypeDescription
$idstring

Cache id

Returns
TypeDescription
int | false(a cache is not available) or "last modified" timestamp (int) of the available cache record
methodpublictouch(string $id, int $extraLifetime) : boolean

Give (if possible) an extra lifetime to the given cache id

Parameters
NameTypeDescription
$idstring

cache id

$extraLifetimeint
Returns
TypeDescription
booleantrue if ok
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