How can I clear the cache for the params of a custom component?

Question

I am working on a custom component and it works as intended as long as I do not have cache enabled.

In the admin section of the component, I have a view that can change the "component params":

$params = JComponentHelper::getParams( 'com_example' );
$params->set( 'customsetting', 'test' );

$componentid = JComponentHelper::getComponent('com_example')->id;
$table = JTable::getInstance('extension');
$table->load($componentid);
$table->bind(array('params' => $params->toString()));

if (!$table->check()) {
    echo $table->getError();
}
if (!$table->store()) {
    echo $table->getError();
}

and load that setting with

$params = JComponentHelper::getParams( 'com_example' );
$setting = $params->get( 'customsetting' );

As I mentioned, this works without cache. But with cache, I cannot update the setting.

I guess I need to clear the cache after I change the component parameters, but I could not figure out how.

I tried parent::cleanCache('com_hbmanager');, but it had no effect. https://docs.joomla.org/Cache also didn't help me finding a solution.

Is there a way to clear the cache for the parameters of a component?

Answer 1

Are you using custom caching or built-in ? I've never had problems with component cache.

I've put your snippet inside com_content and it worked despite cache was on.

You can delete all site cache via model:

JModelLegacy::addIncludePath(JPATH_ADMINISTRATOR.'/components/com_cache/models', 'Cache');
$model = JModelLegacy::getInstance('Cache', 'CacheModel');
$model->clean();
//$model->clean('_system'); SYSTEM_CACHE_ONLY

This is equivalent to:

$cache = JCache::getInstance('output', 
            [
                'defaultgroup'=>'',             
                'cachebase' => JPATH_SITE.'/cache' or JPATH_ADMINISTRATOR for admin cache
            ]);
$cache->clean();

System cache will rebuild _system as quick as you hit administrator area again :)