Normally you'd call $filter->filter('some/path') and this would return a
new path. Let's say you want to cache this call. In this case you have two
syntaxes available:
$cacheOuput = $cachedFilter->filter('some/path');
// or
$cacheOutput = $cachedFilter->call("filter", array('some/path'));
Both are saying "Call the method filter() in the object that I specified in
$cachedFilter's configuration and pass it the string 'some/path' as its
parameter".
Every time you pass it another string, it will generate another (different)
cache entry.
If you look at the source, the ObjectPattern
<https://github.com/zendframework/zf2/blob/master/library/Zend/Cache/Pattern/ObjectCache.php>
is just a subclass of the CallbackPattern. More specifically, look at the
call
<https://github.com/zendframework/zf2/blob/master/library/Zend/Cache/Pattern/CallbackCache.php#L43>
method and see how the keys are generated. This should become clear then.
On the other hand, st this up in your dev environment with a FileSystem
adapter and cache just one call. Look inside the cache file. Now cache a
second, different, call. Look inside the cache file. This will make it
perfectly clear what's happening.
On Wed, Jun 4, 2014 at 5:18 AM, Marc Tempelmeier <
[email protected]> wrote:
> Hmm, I don´t get the parameter in the array, is there one cache entry per
> parameter?
>
>
>
> $cachedFilter->call("filter", *array*('path1));
>
> $cachedFilter->call("filter", *array*('path2));
>
>
>
> Generates 2 cache entries?
>
>
>
>
>
> *Von:* Julian Vidal [mailto:[email protected]]
> *Gesendet:* Mittwoch, 4. Juni 2014 10:22
>
> *An:* Marc Tempelmeier
> *Cc:* Zend Framework General
> *Betreff:* Re: [fw-general] Zend\Cache\Pattern
>
>
>
> There's one in the documentation but you need to scroll all the way down
> as the first example at the top only show how to create it and not saving
> and loading:
> http://framework.zend.com/manual/2.1/en/modules/zend.cache.pattern.object-cache.html
>
>
>
> What's strange in this example is that this filter is so fast that it
> won't need caching but the idea is that you'd use this pattern while
> calling a method that takes a considerable time to execute.
>
>
>
> $filter = *new* Zend\Filter\RealPath();
>
> $cachedFilter = Zend\Cache\PatternFactory::factory('object', *array*(
>
> 'object' => $filter,
>
> 'object_key' => 'RealpathFilter',
>
> 'storage' => 'apc',
>
>
>
> *// The realpath filter doesn't output anything*
>
> *// so the output don't need to be caught and cached*
>
> 'cache_output' => *false*,
>
> ));
>
>
>
> $path = $cachedFilter->call("filter", *array*('/www/var/path/../../mypath'));
>
> *// OR*
>
> $path = $cachedFilter->filter('/www/var/path/../../mypath');
>
>
>
> On Wed, Jun 4, 2014 at 4:07 AM, Marc Tempelmeier <
> [email protected]> wrote:
>
> Can you provide a simple example for hmmm, the ObjectCache incl. saving
> and loading?
>
>
>
> *Von:* Julian Vidal [mailto:[email protected]]
> *Gesendet:* Dienstag, 3. Juni 2014 23:17
> *An:* Marc Tempelmeier
> *Cc:* Zend Framework General
> *Betreff:* Re: [fw-general] Zend\Cache\Pattern
>
>
>
> The "storage" is just an adapter that saves the data in different
> locations depending on which adapter you use (disk, memcached, etc).
>
> The patterns are much higher level and are designed to solve a specific
> caching problem. The one I use most often is the CaptureCache. It is
> designed to "capture" the output of a web page and store it into a file
> while keeping the directory structure the same as the url. The pattern uses
> a storage and not the other way around.
>
> You could use just a storage to capture a web page but you'd have to code
> a lot more to generate the files, create the directory structure, etc, etc.
> That's what the pattern does.
>
> Each pattern solves a specific high level problem if you will. Each
> storage just deals with saving your data and that's it.
>
>
>
> On Tue, Jun 3, 2014 at 9:03 AM, Marc Tempelmeier <
> [email protected]> wrote:
>
> Hi,
>
> what ist he purpose of the cache patterns?
> How can I use them? When should I use the storage or the pattern?
>
> Greetings
>
> Marc
>
> --
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>
>
>
>
>
