Documentation

CRM_Utils_Cache_Memcached
in package
implements CRM_Utils_Cache_Interface uses CRM_Utils_Cache_NaiveMultipleTrait

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copyright

CiviCRM LLC https://civicrm.org/licensing

Table of Contents

Interfaces

CRM_Utils_Cache_Interface

Constants

DEFAULT_HOST  = 'localhost'
DEFAULT_PORT  = 11211
DEFAULT_PREFIX  = ''
DEFAULT_TIMEOUT  = 3600
MAX_KEY_LEN  = 200
NS_LOCAL_TTL  = 5
If another process clears namespace, we'll find out in ~5 sec.

Properties

$_cache  : Memcached
The actual memcache object.
$_host  : string
The host name of the memcached server
$_port  : int
The port on which to connect on
$_prefix  : string
The prefix prepended to cache keys.
$_timeout  : int
The default timeout to use
$_truePrefix  : null|array<string|int, mixed>

Methods

__construct()  : CRM_Utils_Cache_Memcached
Constructor.
cleanKey()  : mixed|string
clear()  : bool
Delete all values from the cache.
delete()  : mixed
Delete a value from the cache.
deleteMultiple()  : bool
Deletes multiple cache items in a single operation.
flush()  : bool
Delete all values from the cache.
get()  : mixed
Get a value from the cache.
getMultiple()  : iterable<string|int, mixed>
Obtains multiple cache items by their unique keys.
has()  : bool
Determines whether an item is present in the cache.
set()  : bool
Set the value in the cache.
setMultiple()  : bool
Persists a set of key => value pairs in the cache, with an optional TTL.
getTruePrefix()  : mixed
assertIterable()  : mixed

Constants

DEFAULT_HOST

public mixed DEFAULT_HOST = 'localhost'

DEFAULT_PORT

public mixed DEFAULT_PORT = 11211

DEFAULT_PREFIX

public mixed DEFAULT_PREFIX = ''

DEFAULT_TIMEOUT

public mixed DEFAULT_TIMEOUT = 3600

NS_LOCAL_TTL

If another process clears namespace, we'll find out in ~5 sec.

public mixed NS_LOCAL_TTL = 5

Properties

$_cache

The actual memcache object.

protected Memcached $_cache

$_host

The host name of the memcached server

protected string $_host = self::DEFAULT_HOST

$_port

The port on which to connect on

protected int $_port = self::DEFAULT_PORT

$_prefix

The prefix prepended to cache keys.

protected string $_prefix = self::DEFAULT_PREFIX

If we are using the same memcache instance for multiple CiviCRM installs, we must have a unique prefix for each install to prevent the keys from clobbering each other.

$_timeout

The default timeout to use

protected int $_timeout = self::DEFAULT_TIMEOUT

Methods

cleanKey()

public cleanKey(mixed $key) : mixed|string
Parameters
$key : mixed
Return values
mixed|string

clear()

Delete all values from the cache.

public clear() : bool

NOTE: flush() and clear() should be aliases. flush() is specified by Civi's traditional interface, and clear() is specified by PSR-16.

Return values
bool

delete()

Delete a value from the cache.

public delete(mixed $key) : mixed
Parameters
$key : mixed

deleteMultiple()

Deletes multiple cache items in a single operation.

public deleteMultiple(iterable<string|int, mixed> $keys) : bool
Parameters
$keys : iterable<string|int, mixed>

A list of string-based keys to be deleted.

Tags
throws
InvalidArgumentException

MUST be thrown if $keys is neither an array nor a Traversable, or if any of the $keys are not a legal value.

Return values
bool —

True if the items were successfully removed. False if there was an error.

flush()

Delete all values from the cache.

public flush() : bool
Return values
bool

get()

Get a value from the cache.

public get(mixed $key[, mixed $default = NULL ]) : mixed
Parameters
$key : mixed
$default : mixed = NULL

getMultiple()

Obtains multiple cache items by their unique keys.

public getMultiple(iterable<string|int, mixed> $keys[, mixed $default = NULL ]) : iterable<string|int, mixed>
Parameters
$keys : iterable<string|int, mixed>

A list of keys that can obtained in a single operation.

$default : mixed = NULL

Default value to return for keys that do not exist.

Tags
throws
InvalidArgumentException

MUST be thrown if $keys is neither an array nor a Traversable, or if any of the $keys are not a legal value.

Return values
iterable<string|int, mixed> —

A list of key => value pairs. Cache keys that do not exist or are stale will have $default as value.

has()

Determines whether an item is present in the cache.

public has(string $key) : bool
Parameters
$key : string
Tags
throws
CacheException
Return values
bool

set()

Set the value in the cache.

public set(mixed $key, mixed $value[, null|int|DateInterval $ttl = NULL ]) : bool
Parameters
$key : mixed
$value : mixed
$ttl : null|int|DateInterval = NULL
Tags
throws
Exception
Return values
bool

setMultiple()

Persists a set of key => value pairs in the cache, with an optional TTL.

public setMultiple(iterable<string|int, mixed> $values[, null|int|DateInterval $ttl = NULL ]) : bool
Parameters
$values : iterable<string|int, mixed>

A list of key => value pairs for a multiple-set operation.

$ttl : null|int|DateInterval = NULL

Optional. The TTL value of this item. If no value is sent and the driver supports TTL then the library may set a default value for it or let the driver take care of that.

Tags
throws
InvalidArgumentException

MUST be thrown if $values is neither an array nor a Traversable, or if any of the $values are not a legal value.

Return values
bool —

True on success and false on failure.

getTruePrefix()

protected getTruePrefix() : mixed 

        

        
    




    

    

                                

                

                                
    

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