Calling Methods

You use the invokeMethod interface to call a method in a class supported by a provider. To retrieve the signature of a method, an application must first get the definition of the class to which the method belongs. The invokeMethod method returns a CIMValue. The return value is null when the method that you invoke does not define a return value.

The invokeMethod interface takes four arguments, as described in the following table.

Example 4–15 Calling a Method

This example gets the instances of the CIM_Service class, which represent services that manage device or software features. The example uses the invokeMethod method to stop each service.

{
    ...
    /* Pass the CIM Object Path of the CIM_Service class 
    to the CIM Object Manager. We want to invoke a method defined in
    this class. */ 
     
    CIMObjectPath op = new CIMObjectPath("CIM_Service"); 
     
    /* The CIM Object Manager returns an enumeration of instance
    object paths, the names of instances of the CIM_Service 
    class. */
     
    Enumeration e = cc.enumerateInstanceNames (op, true); 
     
    /* Iterate through the enumeration of instance object paths */
     
    while(e.hasMoreElements()) {
                // Get the instance
                CIMObjectPath op = (CIMObjectPath) e.nextElement();
                //Invoke the Stop Service method to stop the CIM services.
                cc.invokeMethod("StopService", null, null);
              }
}