Question

I have a script that sends order data to a 3rd party system via a RESTful web service. This system demands that a unique ID is sent with each request, which is autoincremented from the next.

I’ve implemented this by adding a variable for this in Magento’s core_config_data table, and as part of my code the function below is called to get the next value for the ID, incrementing it for the next request.

class MyProject
{
    public function getNextApiId() {
        // Get the next ID.
        $id = Mage::getStoreConfig('myproject/next_api_id');

        // Increment the stored value for next time.
        $nextId = $id + 1; // change $id++ by $id + 1 otherwise the result of $nextId = $id - 1;
        Mage::getModel('core/config')->saveConfig('myproject/next_api_id',$nextId);

        // Refresh the config.
        Mage::getConfig()->cleanCache();
        Mage::getConfig()->reinit();

        // Return the ID.
        return $id;
    }
}

If I send one request with my script, this works fine – the value is incremented and the next ID is used for the next execution of the script.

However, the value appears to be cached if I’m processing multiple requests in a loop within the same script execution. The code below should illustrate the general flow, though I’ve reduced it for brevity:

function sendRequest($item) {
    $apiId = $MyProject->getNextApiId();

    // Build and send request body
}

foreach($items as $item) {
    sendRequest($item);
}

This would result in the initial ID number being used for all $items.

The cleanCache() and reinit() attempts to refresh the config cache do not seem to work at all. Any ideas on how to stop the value from being cached?

Answer 1

Cache must be cleaned in a different way, you have to reset the cache of the store and init it again cause of the loop. If you didn’t have a loop, it will be cleaned also but it needs a second url request of the shop which will init the cache.

Try this instead:

function getNextApiId() {
    // Get the next ID.
    $id = Mage::getStoreConfig('myproject/next_api_id');

    // Increment the stored value for next time.
    $nextId = $id + 1;

    Mage::getConfig()->saveConfig('myproject/next_api_id',$nextId);

    // Refresh the config.
    Mage::app()->getStore()->resetConfig();

    // Return the ID.
    return $id;
}