Multi-Version Web Services

[eluser]Kyle Johnson[/eluser]
What's up everyone?

I'm trying to set up a new version of some web services, but want to ensure that anyone using the previous version is still able to. Can anyone point me in the right direction? When I started the project I included the version in the uri segment, but now I'm not entirely sure how to call the function that is supposed to be for a different version.

Code:

public function RequestService() {
     switch ($this->uri->segment(3)) {
      case 'v1':
       try {
        ini_set("soap.wsdl_cache_enabled", "0");
        $server = new SoapServer(base_url() . 'wsdl/RequestService_v1.wsdl', array(
                                   'soap_version' => SOAP_1_2));
        //$server->setClass("Wsvc");
        $server->setObject($this);
        $server->handle();
       } catch (SoapFault $exception) {
        echo $exception;
       }
      break;
      
      case 'v2':
       try {
        ini_set("soap.wsdl_cache_enabled", "0");
        $server = new SoapServer(base_url() . 'wsdl/RequestService_v2.wsdl', array(
                                          'soap_version' => SOAP_1_2));
        //$server->setClass("Wsvc");
        $server->setObject($this);
        $server->handle();
       } catch (SoapFault $exception) {
        echo $exception;
       }
       break;
      
      default:
       ;
      break;
     }
    }

The part I'm not sure about is how to make $server->handle() call the proper version of the function. Once the data gets passed to the function I have access to the data object, and can call different methods from within, but this means updating the WSDL with a new element for versioning.

So if for example, the wsdl has a CreateRequest method I could do something like this:

Code:

public function CreateRequest($data) {
     if(isset($data->Version->MajorVersion))
     {
      switch ($data->Version->MajorVersion) {
       case '2':
        return _createRequest_v2($data);
       break;
      }
     } else {
      // assume old version
      // do stuff
     }
    }

Or is there a better way to facilitate this?