Magento: Is it safe to override event observer core class?

Question

Suppose, there is an event observer class in core. I can override it. But, is it safe? I mean, does it affect other functions of the observer class?

Like, if there are two functions in core observer class and I did override only one function. Then, will the other function work safely as before.

I think it is similar to model override and should be safe. Am I right?

Edit:-

For example,

• There is a class CoreClassA in core.
• There is a function coreFunctionA in CoreClassA.
• An event core_event_a is dispatched in this coreFunctionA.
• Another core module CoreModuleB is creating event observer with core_event_a.
• So, whenever core_event_a is dispatched, CoreModuleB's event observer is called.
• Suppose, CoreModuleB's event observer contains two functions. One for core_event_a dispatch action (let us name it eventDispatchA) and another for some other event dispatch action (let's say eventDispatchX).
• In my custom module, I want to override eventDispatchA. Basically, I want to change the some code in eventDispatchA or, I may just want to skip/omit this function. I can override it. But, will it affect eventDispatchX if I do so? Or, is there any other better way instead of overriding event observer?

Answer 1

Most probably it will but if you override something that others might be using it's always worth to make something similar:

    public function samefunction($object){
        if(mymodueleisused){
            //do your different thing
        } else {
           return parent::samefunction();
        }
    }

and as others have told you : "if you are in need to change/override the core then you are probably doing it wrong" and it's better to ask in different manner by describing what you want to do and why