Dynamic event in Magento 2

Question

I working with dynamic event in Magento 2, i detected dynamic event call 3 times(example: customer_address_save_after event). This problem in here because i only want run once times this dynamic event.

How to fix this issue ?

Answer 1

Instead of flags you can use Registry class.

create instance from constructor

public function __construct(\Magento\Framework\Registry $registry) {
        $this->_coreRegistry = $registry;
    }

to register

$this->_coreRegistry->register('customer_address_save_observer_executed_' . $customerAddress->getId(),true);

to get the from register weather it's executed or not? if executed just return this otherwise it will execute.

if($this->_coreRegistry->registry('customer_address_save_observer_executed_' . $customerAddress->getId()))
                    return $this;

Answer 2

You should be able to set a flag and check it before running your code.

if($flag) { //check if flag is already set
    return; // return, flag is set
} else {
    fn(); //your code here
    $flag = true;
}

Flag can be a session flag or something you add to the original object and check after.

Something (pretty) similar can be found here.