Cache/Backend/Sqlite.php

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Zend Framework

LICENSE

This source file is subject to the new BSD license that is bundled with this package in the file LICENSE.txt. It is also available through the world-wide-web at this URL: http://framework.zend.com/license/new-bsd If you did not receive a copy of the license and are unable to obtain it through the world-wide-web, please send an email to [email protected] so we can send you a copy immediately.

Category: Zend
Copyright: Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License
Package: Zend_Cache
Subpackage: Zend_Cache_Backend
Version: $Id: Sqlite.php 24593 2012-01-05 20:35:02Z matthew $

\Zend_Cache_Backend_Sqlite
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Package: Zend\Cache\Zend\Cache\Backend

Implements: \Zend_Cache_Backend_ExtendedInterface
Parent(s): \Zend_Cache_Backend
Copyright: Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
License: New BSD License

Properties

mixed $_db = null

DB ressource

Default valuenullDetails

Type: mixed

array $_directives = array('lifetime' => 3600, 'logging' => false, 'logger' => null)

inherited

Frontend or Core directives

<p>directives</p>Inherited from: \Zend_Cache_Backend::$$_directives

=====> (int) lifetime : - Cache lifetime (in seconds) - If null, the cache is valid forever

=====> (int) logging : - if set to true, a logging is activated throw Zend_Log

Default valuearray('lifetime' => 3600, 'logging' => false, 'logger' => null)Details

Type: array
Inherited_from: \Zend_Cache_Backend::$$_directives

array $_options = array('cache_db_complete_path' => null, 'automatic_vacuum_factor' => 10)

Available options

<p>Available options</p>

=====> (string) cache_db_complete_path : - the complete path (filename included) of the SQLITE database

====> (int) automatic_vacuum_factor : - Disable / Tune the automatic vacuum process - The automatic vacuum process defragment the database file (and make it smaller) when a clean() or delete() is called 0 => no automatic vacuum 1 => systematic vacuum (when delete() or clean() methods are called) x (integer) > 1 => automatic vacuum randomly 1 times on x clean() or delete()

Default valuearray('cache_db_complete_path' => null, 'automatic_vacuum_factor' => 10)Details

Type: array

boolean $_structureChecked = false

Boolean to store if the structure has benn checked or not

Default valuefalseDetails

Type: boolean

Methods

___expire(string $id) : void

PUBLIC METHOD FOR UNIT TESTING ONLY !

Force a cache record to expire

Parameters

Name	Type	Description
$id	string	Cache id

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

Constructor

Parameters

Name	Type	Description
$options	array	Associative array of options

Throws

Exception	Description
\Zend_cache_Exception

__destruct() : void

Destructor

_automaticVacuum() : void

Deal with the automatic vacuum process

_buildStructure() : false

Build the database structure

Returns

Type	Description
false

_checkAndBuildStructure() : boolean

Check if the database structure is ok (with the good version), if no : build it

Returns

Type	Description
boolean	True if ok

Throws

Exception	Description
\Zend_Cache_Exception

_checkStructureVersion() : boolean

Check if the database structure is ok (with the good version)

Returns

Type	Description
boolean	True if ok

_clean(string $mode = \Zend_Cache::CLEANING_MODE_ALL, array $tags = array()) : boolean

Clean some cache records

Available modes are : Zend_Cache::CLEANING_MODE_ALL (default) => remove all cache entries ($tags is not used) Zend_Cache::CLEANING_MODE_OLD => remove too old cache entries ($tags is not used) Zend_Cache::CLEANING_MODE_MATCHING_TAG => remove cache entries matching all given tags ($tags can be an array of strings or a single string) Zend_Cache::CLEANING_MODE_NOT_MATCHING_TAG => remove cache entries not {matching one of the given tags} ($tags can be an array of strings or a single string) Zend_Cache::CLEANING_MODE_MATCHING_ANY_TAG => remove cache entries matching any given tags ($tags can be an array of strings or a single string)

Parameters

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

Returns

Type	Description
boolean	True if no problem

_getConnection() : resource

Return the connection resource

If we are not connected, the connection is made

Returns

Type	Description
resource	Connection resource

Throws

Exception	Description
\Zend_Cache_Exception

_isGoodTmpDir(string $dir) : boolean

inherited

Verify if the given temporary directory is readable and writable

Inherited from: \Zend_Cache_Backend::_isGoodTmpDir()

Parameters

Name	Type	Description
$dir	string	temporary directory

Returns

Type	Description
boolean	true if the directory is ok

_log(string $message, $priority = 4) : void

inherited

Log a message at the WARN (4) priority.

Inherited from: \Zend_Cache_Backend::_log()

Parameters

Name	Type	Description
$message	string
$priority

Throws

Exception	Description
\Zend_Cache_Exception

_loggerSanity() : void

inherited

Make sure if we enable logging that the Zend_Log class is available.

Inherited from: \Zend_Cache_Backend::_loggerSanity()

Create a default log object if none is set.

Throws

Exception	Description
\Zend_Cache_Exception

_query(string $query) : mixed | false

Execute an SQL query silently

Parameters

Name	Type	Description
$query	string	SQL query

Returns

Type	Description
mixed \| false	query results

_registerTag(string $id, string $tag) : boolean

Parameters

Name	Type	Description
$id	string	Cache id
$tag	string	Tag

Returns

Type	Description
boolean	True if no problem

clean(string $mode = \Zend_Cache::CLEANING_MODE_ALL, array $tags = array()) : boolean

Clean some cache records

Parameters

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

Returns

Type	Description
boolean	True if no problem

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)

getLifetime(int $specificLifetime) : int

inherited

Get the life time

Inherited from: \Zend_Cache_Backend::getLifetime()

if $specificLifetime is not false, the given specific life time is used else, the global lifetime is used

Parameters

Name	Type	Description
$specificLifetime	int

Returns

Type	Description
int	Cache life time

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)

getOption(string $name) : mixed

inherited

Returns an option

Inherited from: \Zend_Cache_Backend::getOption()

Parameters

Name	Type	Description
$name	string	Optional, the options name to return

Returns

Type	Description
mixed

Throws

Exception	Description
\Zend_Cache_Exceptions

getTags() : array

Return an array of stored tags

Returns

Type	Description
array	array of stored tags (string)

getTmpDir() : string

inherited

Determine system TMP directory and detect if we have read access

Inherited from: \Zend_Cache_Backend::getTmpDir()

inspired from Zend_File_Transfer_Adapter_Abstract

Returns

Type	Description
string

Throws

Exception	Description
\Zend_Cache_Exception	if unable to determine directory

isAutomaticCleaningAvailable() : boolean

inherited

Return true if the automatic cleaning is available for the backend

Inherited from: \Zend_Cache_Backend::isAutomaticCleaningAvailable()

DEPRECATED : use getCapabilities() instead

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

Throws

Exception	Description
\Zend_Cache_Exception

setDirectives(array $directives) : void

inherited

Set the frontend directives

Inherited from: \Zend_Cache_Backend::setDirectives()

Parameters

Name	Type	Description
$directives	array	Assoc of directives

Throws

Exception	Description
\Zend_Cache_Exception

setOption(string $name, mixed $value) : void

inherited

Set an option

Inherited from: \Zend_Cache_Backend::setOption()

Parameters

Name	Type	Description
$name	string
$value	mixed

Throws

Exception	Description
\Zend_Cache_Exception

test(string $id) : mixed | false

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

Parameters

Name	Type	Description
$id	string	Cache id

Returns

Type	Description
mixed \| 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/Sqlite.php

\Zend_Cache_Backend_Sqlitejump to top

Properties

Methods

\Zend_Cache_Backend_Sqlite
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