MemoizedCallable Class Reference

APC-backed and APCu-backed function memoization. More...

Public Member Functions
	__construct ( $callable, $ttl=3600)
	invoke (... $params)
	Invoke the memoized function or method.
	invokeArgs (array $args=[])
	Invoke the memoized function or method.

Static Public Member Functions
static	call ( $callable, array $args=[], $ttl=3600)
	Shortcut method for creating a MemoizedCallable and invoking it with the specified arguments.

Protected Member Functions
	fetchResult ( $key, &$success)
	Fetch the result of a previous invocation from APC or APCu.
	storeResult ( $key, $result)
	Store the result of an invocation in APC or APCu.

Private Attributes
callable	$callable
string	$callableName
	Unique name of callable; used for cache keys.
int	$ttl

Detailed Description

APC-backed and APCu-backed function memoization.

This class provides memoization for pure functions. A function is pure if its result value depends on nothing other than its input parameters and if invoking it does not cause any side-effects.

The first invocation of the memoized callable with a particular set of arguments will be delegated to the underlying callable. Repeat invocations with the same input parameters will be served from APC or APCu.

Example:

$memoizedStrrev = new MemoizedCallable( 'range' );
$memoizedStrrev->invoke( 5, 8 );  // result: array( 5, 6, 7, 8 )
$memoizedStrrev->invokeArgs( array( 5, 8 ) );  // same
MemoizedCallable::call( 'range', array( 5, 8 ) );  // same

Since

1.27

Definition at line 43 of file MemoizedCallable.php.

Constructor & Destructor Documentation

__construct()

MemoizedCallable::__construct	(		$callable,
			$ttl = 3600 )

Exceptions

InvalidArgumentException

if $callable is not a callable.

Parameters

callable	$callable	Function or method to memoize.
int	$ttl	TTL in seconds. Defaults to 3600 (1hr). Capped at 86400 (24h).

Definition at line 59 of file MemoizedCallable.php.

References $callable, and $ttl.

Member Function Documentation

call()

static MemoizedCallable::call ( $callable, array $args = [], $ttl = 3600 )

static

Shortcut method for creating a MemoizedCallable and invoking it with the specified arguments.

Parameters

callable	$callable
array	$args
int	$ttl

Returns

mixed

Definition at line 157 of file MemoizedCallable.php.

References $args, $callable, and $ttl.

Referenced by ResourceLoaderWikiModule\getStyles().

fetchResult()

MemoizedCallable::fetchResult ( $key, & $success )

protected

Fetch the result of a previous invocation from APC or APCu.

Parameters

string	$key
bool	&$success

Returns

bool

Definition at line 83 of file MemoizedCallable.php.

References $success.

Referenced by invokeArgs().

invoke()

MemoizedCallable::invoke

(

$params

)

Invoke the memoized function or method.

Like MemoizedCallable::invokeArgs(), but variadic.

Parameters

mixed

...$params Parameters for memoized function or method.

Returns

mixed The memoized callable's return value.

Definition at line 144 of file MemoizedCallable.php.

References invokeArgs().

invokeArgs()

MemoizedCallable::invokeArgs

(

array

$args = []

)

Invoke the memoized function or method.

Exceptions

InvalidArgumentException

If parameters list contains non-scalar items.

Parameters

array

$args

Parameters for memoized function or method.

Returns

mixed The memoized callable's return value.

Definition at line 114 of file MemoizedCallable.php.

References $args, $callable, $success, fetchResult(), serialize(), and storeResult().

Referenced by invoke().

storeResult()

MemoizedCallable::storeResult ( $key, $result )

protected

Store the result of an invocation in APC or APCu.

Parameters

string	$key
mixed	$result

Definition at line 99 of file MemoizedCallable.php.

Referenced by invokeArgs().

Member Data Documentation

$callable

callable MemoizedCallable::$callable

private

Definition at line 46 of file MemoizedCallable.php.

Referenced by __construct(), call(), and invokeArgs().

$callableName

string MemoizedCallable::$callableName

private

Unique name of callable; used for cache keys.

Definition at line 49 of file MemoizedCallable.php.

$ttl

int MemoizedCallable::$ttl

private

Definition at line 52 of file MemoizedCallable.php.

Referenced by __construct(), and call().

---

The documentation for this class was generated from the following file:

• includes/libs/MemoizedCallable.php