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MemoizedCallable Class Reference

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.
 
 storeResult ( $key, $result)
 Store the result of an invocation.
 

Detailed Description

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 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
APCu-backed function memoization.
static call( $callable, array $args=[], $ttl=3600)
Shortcut method for creating a MemoizedCallable and invoking it with the specified arguments.
Since
1.27

Definition at line 43 of file MemoizedCallable.php.

Constructor & Destructor Documentation

◆ __construct()

MemoizedCallable::__construct ( $callable,
$ttl = 3600 )
Parameters
callable$callableFunction or method to memoize.
int$ttlTTL in seconds. Defaults to 3600 (1hr). Capped at 86400 (24h).

Definition at line 58 of file MemoizedCallable.php.

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 151 of file MemoizedCallable.php.

References $args.

◆ fetchResult()

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

Fetch the result of a previous invocation.

Parameters
string$key
bool&$success
Returns
bool

Definition at line 81 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 138 of file MemoizedCallable.php.

References invokeArgs().

◆ invokeArgs()

MemoizedCallable::invokeArgs ( array $args = [])

Invoke the memoized function or method.

Exceptions
InvalidArgumentExceptionIf parameters list contains non-scalar items.
Parameters
array$argsParameters for memoized function or method.
Returns
mixed The memoized callable's return value.

Definition at line 108 of file MemoizedCallable.php.

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

Referenced by invoke().

◆ storeResult()

MemoizedCallable::storeResult ( $key,
$result )
protected

Store the result of an invocation.

Parameters
string$key
mixed$result

Definition at line 95 of file MemoizedCallable.php.

Referenced by invokeArgs().


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