Caching in Single pages

Developing with Concrete
1

Couldn’t find any answer if this is by now finally possible: Can single pages be cached depending on their parameters.

Eg. /hotel/hotelname1 gets a different cache than /hotel/hotelname2.

Possible out of the box or only with my own implementation?

5

Yes you can cache specific pages by going to page properties and setting the caching options for the page manually.

6

Hi Evan. Thank you, but that would mean I need to add and change hundreds of changing entries, while it should be possible to say to just cache any parameter of a single page on its own.

I made an own implementation now. That seems to work fine.

1 Like
7

Awesome, sounds good! Just a note that you can also change properties in bulk in the page search. But it sounds like you’ve got it handled. :+1:

8

If anyone else needs it:

// Check if the user is registered and whether caching for registered users is allowed
if ($this->checkIsRegisteredUser() && !$this->btCacheBlockOutputForRegisteredUsers) {
    // For users who don't meet caching criteria, generate content dynamically
    $content = $this->generateDynamicContent($parameters);
} else {
    // Generate a cache key based on id of the url and active language
    $cacheKey = Localization::activeLanguage() . '_hotel_' . md5($url_name);
    $timestampCacheKey = $cacheKey . '_timestamp';

    // Fetch the cache service
    $cache = $this->app->make('cache/expensive');
    $cachedContent = $cache->getItem($cacheKey);
    $timestampItem = $cache->getItem($timestampCacheKey);

    $refreshCache = false;

    if ($timestampItem->isHit()) {
        $lastCacheTime = $timestampItem->get();
        $currentTime = time();

        // Check if the cache has expired based on the last cache time and the defined lifetime
        if (($currentTime - $lastCacheTime) >= $this->singlePageCacheLifetime) {
            $refreshCache = true;
        }
    } else {
        $refreshCache = true; // No timestamp means we need to refresh the cache
    }

    if (!$cachedContent->isHit() || $refreshCache) {
        // Cache miss or cache needs to be refreshed: Generate dynamic content
        $content = $this->generateDynamicContent($parameters);
        
        // Store the generated content in the cache with the specified lifetime
        $cachedContent->set($content);
        $cachedContent->expiresAfter($this->singlePageCacheLifetime);
        $cache->save($cachedContent);

        // Update the timestamp of when the content was cached
        $timestampItem->set(time());
        $cache->save($timestampItem);
    } else {
        // Cache hit: Retrieve cached content
        $content = $cachedContent->get();
    }
}
1 Like