Cache/Backend/Libmemcached.php

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Zend Framework

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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
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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

 
                DEFAULT_HOST
                = '127.0.0.1'

Default Server Values

 
                DEFAULT_PORT
                = 11211

 
                DEFAULT_WEIGHT
                = 1

 
                TAGS_UNSUPPORTED_BY_CLEAN_OF_LIBMEMCACHED_BACKEND
                = 'Zend_Cache_Backend_Libmemcached::clean() : tags are unsupported by the Libmemcached backend'

Log message

 
                TAGS_UNSUPPORTED_BY_SAVE_OF_LIBMEMCACHED_BACKEND
                = 'Zend_Cache_Backend_Libmemcached::save() : tags are unsupported by the Libmemcached backend'

Properties

mixed $_memcache = null

Memcached object

Default valuenullDetails

Type: mixed

array $_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 value

array('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

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

Constructor

Parameters

Name	Type	Description
$options	array	associative array of options

Throws

Exception	Description
\Zend_Cache_Exception

clean(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

Name	Type	Description
$mode	string	Clean mode
$tags	array	Array of tags

Returns

Type	Description
boolean	True if no problem

Throws

Exception	Description
\Zend_Cache_Exception

getCapabilities() : 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

Type	Description
array	associative of with capabilities

getFillingPercentage() : int

Return the filling percentage of the backend storage

Returns

Type	Description
int	integer between 0 and 100

Throws

Exception	Description
\Zend_Cache_Exception

getIds() : array

Return an array of stored cache ids

Returns

Type	Description
array	array of stored cache ids (string)

getIdsMatchingAnyTags(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

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of any matching cache ids (string)

getIdsMatchingTags(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

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of matching cache ids (string)

getIdsNotMatchingTags(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

Name	Type	Description
$tags	array	array of tags

Returns

Type	Description
array	array of not matching cache ids (string)

getMetadatas(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

Name	Type	Description
$id	string	cache id

Returns

Type	Description
array	array of metadatas (false if the cache id is not found)

getTags() : array

Return an array of stored tags

Returns

Type	Description
array	array of stored tags (string)

isAutomaticCleaningAvailable() : boolean

Return true if the automatic cleaning is available for the backend

Returns

Type	Description
boolean

load(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

Name	Type	Description
$id	string	Cache id
$doNotTestCacheValidity	boolean	If set to true, the cache validity won't be tested

Returns

Type	Description
string \| false	cached datas

remove(string $id) : boolean

Remove a cache record

Parameters

Name	Type	Description
$id	string	Cache id

Returns

Type	Description
boolean	True if no problem

save(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

Name	Type	Description
$data	string	Datas to cache
$id	string	Cache id
$tags	array	Array of strings, the cache record will be tagged by each string entry
$specificLifetime	int	If != false, set a specific lifetime for this cache record (null => infinite lifetime)

Returns

Type	Description
boolean	True if no problem

setDirectives(array $directives) : void

Set the frontend directives

Parameters

Name	Type	Description
$directives	array	Assoc of directives

Throws

Exception	Description
\Zend_Cache_Exception

test(string $id) : int | false

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

Parameters

Name	Type	Description
$id	string	Cache id

Returns

Type	Description
int \| false	(a cache is not available) or "last modified" timestamp (int) of the available cache record

touch(string $id, int $extraLifetime) : boolean

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

Parameters

Name	Type	Description
$id	string	cache id
$extraLifetime	int

Returns

Type	Description
boolean	true if ok

Cache/Backend/Libmemcached.php

\Zend_Cache_Backend_Libmemcachedjump to top

Constants

Properties

Methods

\Zend_Cache_Backend_Libmemcached
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