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CakePHP

C CakePHP 2.2 API

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Classes

  • ApcEngine
  • FileEngine
  • MemcacheEngine
  • RedisEngine
  • WincacheEngine
  • XcacheEngine

Class MemcacheEngine

Memcache storage engine for cache. Memcache has some limitations in the amount of control you have over expire times far in the future. See MemcacheEngine::write() for more information.

CacheEngine
Extended by MemcacheEngine
Package: Cake\Cache\Engine
Copyright: Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
License: License (http://www.opensource.org/licenses/mit-license.php)
Location: Cake/Cache/Engine/MemcacheEngine.php

Properties summary

  • $_Memcache protected
    Memcache
    Memcache wrapper.
  • $_compiledGroupNames protected
    array

    Contains the compiled group names (prefixed witht the global configuration prefix)

  • $settings public
    array
    Settings

Inherited Properties

  • _groupPrefix

Method Summary

  • _parseServerString() protected

    Parses the server address into the host/port. Handles both IPv6 and IPv4 addresses and Unix sockets

  • clear() public
    Delete all keys from the cache
  • clearGroup() public

    Increments the group value to simulate deletion of all keys under a group old values will remain in storage until they expire.

  • connect() public
    Connects to a server in connection pool
  • decrement() public
    Decrements the value of an integer cached key
  • delete() public
    Delete a key from the cache
  • groups() public

    Returns the group value for each of the configured groups If the group initial value was not found, then it initializes the group accordingly.

  • increment() public
    Increments the value of an integer cached key
  • init() public
    Initialize the Cache Engine
  • read() public
    Read a key from the cache
  • write() public

    Write data for key into cache. When using memcache as your cache engine remember that the Memcache pecl extension does not support cache expiry times greater than 30 days in the future. Any duration greater than 30 days will be treated as never expiring.

Method Detail

_parseServerString() protected ¶

_parseServerString( string $server )

Parses the server address into the host/port. Handles both IPv6 and IPv4 addresses and Unix sockets

Parameters
string $server
The server address string.
Returns
array
Array containing host, port

clear() public ¶

clear( boolean $check )

Delete all keys from the cache

Parameters
boolean $check
Returns
boolean
True if the cache was successfully cleared, false otherwise

clearGroup() public ¶

clearGroup( string $group )

Increments the group value to simulate deletion of all keys under a group old values will remain in storage until they expire.

Parameters
string $group
$groups name of the group to be cleared
Returns
boolean
success
Overrides
CacheEngine::clearGroup()

connect() public ¶

connect( string $host , integer $port = 11211 )

Connects to a server in connection pool

Parameters
string $host
host ip address or name
integer $port optional 11211
Server port
Returns
boolean
True if memcache server was connected

decrement() public ¶

decrement( string $key , integer $offset = 1 )

Decrements the value of an integer cached key

Parameters
string $key
Identifier for the data
integer $offset optional 1
How much to subtract
Returns
New
decremented value, false otherwise
Throws
CacheException
when you try to decrement with compress = true

delete() 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

groups() public ¶

groups( )

Returns the group value for each of the configured groups If the group initial value was not found, then it initializes the group accordingly.

Returns
array
Overrides
CacheEngine::groups()

increment() public ¶

increment( string $key , integer $offset = 1 )

Increments the value of an integer cached key

Parameters
string $key
Identifier for the data
integer $offset optional 1
How much to increment
Returns
New
incremented value, false otherwise
Throws
CacheException
when you try to increment with compress = true

init() public ¶

init( array $settings = array() )

Initialize the Cache Engine

Called automatically by the cache frontend To reinitialize the settings call Cache::engine('EngineName', [optional] settings = array());

Parameters
array $settings optional array()
array of setting for the engine
Returns
boolean
True if the engine has been successfully initialized, false if not
Overrides
CacheEngine::init()

read() 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

write() public ¶

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

Write data for key into cache. When using memcache as your cache engine remember that the Memcache pecl extension does not support cache expiry times greater than 30 days in the future. Any duration greater than 30 days will be treated as never expiring.

Parameters
string $key
Identifier for the data
mixed $value
Data to be cached
integer $duration
How long to cache the data, in seconds
Returns
boolean
True if the data was successfully cached, false on failure
See
http://php.net/manual/en/memcache.set.php

Methods inherited from CacheEngine

gc() public ¶

gc( integer $expires = null )

Garbage collection

Permanently remove all expired and deleted data

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

key() 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

settings() public ¶

settings( )

Cache Engine settings

Returns
array
settings

Properties detail

$_Memcache ¶

protected Memcache

Memcache wrapper.

null

$_compiledGroupNames ¶

protected array

Contains the compiled group names (prefixed witht the global configuration prefix)

array()

$settings ¶

public array

Settings

  • servers = string or array of memcache servers, default => 127.0.0.1. If an array MemcacheEngine will use them as a pool.
    • compress = boolean, default => false
array()
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