JFactory/getCache
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Revision as of 08:39, 16 June 2009 by Bembelimen (talk | contribs) (New page: == Example? == The example of the cache is a little bit weird. <source lang="php"> // Define a class to contain the computationally-expensive method. class expensiveClass { function e...)
Revision as of 08:39, 16 June 2009 by Bembelimen (talk | contribs) (New page: == Example? == The example of the cache is a little bit weird. <source lang="php"> // Define a class to contain the computationally-expensive method. class expensiveClass { function e...)
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Example?[edit]
The example of the cache is a little bit weird.
// Define a class to contain the computationally-expensive method.
class expensiveClass {
function expensiveMethod ( $signature ) {
static $instances;
if (!isset( $instances )) $instances = array();
if (empty( $instances[$signature] )) {
// Something that is resource-intensive to produce, here simulated
// by calculating the MD5 hash of the signature.
$instances[$signature] = md5( $signature );
echo 'Cache miss';
} else {
echo 'Cache hit ';
}
return $instances[$signature];
}
}
echo ' : ' . expensiveClass::expensiveMethod('abc') . "\n";
echo ' : ' . expensiveClass::expensiveMethod('efg') . "\n";
echo ' : ' . expensiveClass::expensiveMethod('abc') . "\n";
echo ' : ' . expensiveClass::expensiveMethod('hij') . "\n";
echo ' : ' . expensiveClass::expensiveMethod('klm') . "\n";
echo ' : ' . expensiveClass::expensiveMethod('hij') . "\n";Would also output:
Cache miss : 900150983cd24fb0d6963f7d28e17f72 Cache miss : 7d09898e18511cf7c0c1815d07728d23 Cache hit : 900150983cd24fb0d6963f7d28e17f72 Cache miss : 857c4402ad934005eae4638a93812bf7 Cache miss : 3491f0dc1059a35bb1681b3bd67cb0d5 Cache hit : 857c4402ad934005eae4638a93812bf7
So I think, that this is a really bad example for the cache function. Perhaps you should use this example?
--Bembelimen 13:38, 16 June 2009 (UTC)