Class CacheEngine

Storage engine for CakePHP caching

Direct Subclasses

Abstract
Package: Cake\Cache
Copyright: Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
License: MIT License
Location: Cake/Cache/CacheEngine.php

Properties summary

  • $_groupPrefix protected
    string

    Contains the compiled string with all groups prefixes to be prepended to every key in this cache engine

  • $settings public
    array
    Settings of current engine instance

Method Summary

  • add() public
    Write value for a key into cache if it doesn't already exist
  • clear() abstract public
    Delete all keys from the cache
  • clearGroup() public

    Clears all values belonging to a group. Is up to the implementing engine to decide whether actually delete the keys or just simulate it to achieve the same result.

  • decrement() abstract public
    Decrement a number under the key and return decremented value
  • delete() abstract public
    Delete a key from the cache
  • gc() public
    Garbage collection
  • groups() public

    Does whatever initialization for each group is required and returns the group value for each of them, this is the token representing each group in the cache key

  • increment() abstract public
    Increment a number under the key and return incremented value
  • init() public
    Initialize the cache engine
  • key() public
    Generates a safe key for use with cache engine storage engines.
  • read() abstract public
    Read a key from the cache
  • settings() public
    Cache Engine settings
  • write() abstract public
    Write value for a key into cache

Method Detail

add()source public 

add( string $key , mixed $value , integer $duration )

Write value for a key into cache if it doesn't already exist

Parameters

string $key
Identifier for the data
mixed $value
Data to be cached
integer $duration
How long to cache for.

Returns

boolean
True if the data was successfully cached, false on failure

clear()source abstract public 

clear( boolean $check )

Delete all keys from the cache

Parameters

boolean $check
if true will check expiration, otherwise delete all

Returns

boolean
True if the cache was successfully cleared, false otherwise

clearGroup()source public 

clearGroup( string $group )

Clears all values belonging to a group. Is up to the implementing engine to decide whether actually delete the keys or just simulate it to achieve the same result.

Parameters

string $group
name of the group to be cleared

Returns

boolean

decrement()source abstract public 

decrement( string $key , integer $offset 1 )

Decrement a number under the key and return decremented value

Parameters

string $key
Identifier for the data
integer $offset optional 1
How much to subtract

Returns

New
incremented value, false otherwise

delete()source abstract public 

delete( string $key )

Delete a key from the cache

Parameters

string $key
Identifier for the data

Returns

boolean
True if the value was successfully deleted, false if it didn't exist or couldn't be removed

gc()source public 

gc( integer $expires null )

Garbage collection

Permanently remove all expired and deleted data

Parameters

integer $expires optional null
[optional] An expires timestamp, invalidating all data before.

groups()source public 

groups( )

Does whatever initialization for each group is required and returns the group value for each of them, this is the token representing each group in the cache key

Returns

array

increment()source abstract public 

increment( string $key , integer $offset 1 )

Increment a number under the key and return incremented value

Parameters

string $key
Identifier for the data
integer $offset optional 1
How much to add

Returns

New
incremented value, false otherwise

init()source public 

init( array $settings array() )

Initialize the cache engine

Called automatically by the cache frontend

Parameters

array $settings optional array()
Associative array of parameters for the engine

Returns

boolean
True if the engine has been successfully initialized, false if not

key()source public 

key( string $key )

Generates a safe key for use with cache engine storage engines.

Parameters

string $key
the key passed over

Returns

mixed
string $key or false

read()source abstract public 

read( string $key )

Read a key from the cache

Parameters

string $key
Identifier for the data

Returns

mixed
The cached data, or false if the data doesn't exist, has expired, or if there was an error fetching it

settings()source public 

settings( )

Cache Engine settings

Returns

array
settings

write()source abstract public 

write( string $key , mixed $value , integer $duration )

Write value for a key into cache

Parameters

string $key
Identifier for the data
mixed $value
Data to be cached
integer $duration
How long to cache for.

Returns

boolean
True if the data was successfully cached, false on failure

Properties detail

$_groupPrefixsource

protected string

Contains the compiled string with all groups prefixes to be prepended to every key in this cache engine

null

$settingssource

public array

Settings of current engine instance

array()

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https://api.cakephp.org/2.9/class-CacheEngine.html