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Editorial Team
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Asked: 2026-05-13T11:14:44+00:00

I’ve got a web interface from which I will gather user data (username,pass,email,etc..) and

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I’ve got a web interface from which I will gather user data (username,pass,email,etc..) and the backend has to provision these data into 3 other systems (SystemA, SystemB, SystemC).

The provisioning is being done by 3 different APIs one for each system (A,B and C).

My current design in the backend looks something like this: 


interface ProvisionData
{
    public function createUser();
    public function deleteUser();
    public function changePassword();

}



class SystemA_API_wrapper implements ProvisionData
{
    public function createUser(){ ... }
    public function deleteUser(){ ... }
    public function changePassword(){ ... }
}



class SystemB_API_wrapper implements ProvisionData
{
    public function createUser(){ ... }
    public function deleteUser(){ ... }
    public function changePassword(){ ... }
}



class SystemC_API_wrapper implements ProvisionData
{
    public function createUser(){ ... }
    public function deleteUser(){ ... }
    public function changePassword(){ ... }
}

Each of the System*_API_wrapper has different implementation of createUser() (and the rest) functions.

In the frontend I've created a kind of proxy class which I feed with the data gathered from the web interface.. It looks like:


class provisionProxy
{
    public $sA = null;
    public $sB = null;
    public $sC = null;



//constructor instantiates all System*_API_wrapper objects
public function __construct() {        
     $sA = new SystemA_API_wrapper();
     $sB = new SystemB_API_wrapper();
     $sC = new SystemC_API_wrapper();
}

// proxy function deleteUser calls deleteUser() of each of 
// our APIs 
public function deleteUser($username, $password) {
     $this->sA->deleteUser($username, $password);         
     $this->sB->deleteUser($username, $password);
     $this->sC->deleteUser($username, $password);
}



}




Does anyone have any suggestion or a better practice?


(I've already posted the same question but due to technical problems I can't login to my old account, so the question is revised and posted again under my new account. Original question can be found here: Design Question: Which is Better practice? - thanks)
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1 Answer

  1. Editorial Team

    Based on the assumption that you can’t change your three backend systems to all access a central system for user management (which would be better), the only change I would suggest is for your proxy, where you are hard coding calls to each of your three systems – it would be better to create a list of ProvisionData objects in your constructor and then in your delete/create calls, loop through that list and call the appropriate method on each.

    This means that if, at some point in the future, you have to add system D to this, then that can be done with a change in a single place.

    (My PHP skills are a bit ropy, so won’t attempt to provide the code).

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