Invoked by the ORB to dispatch a request to the servant.

  Invoked by the ORB to dispatch a request to the servant. ORB passes the method name, an InputStream containing the marshalled arguments, and a ResponseHandler which the servant uses to construct a proper reply. Only CORBA SystemException may be thrown by this method. The method must return an OutputStream created by the ResponseHandler which contains the marshalled reply. A servant must not retain a reference to the ResponseHandler beyond the lifetime of a method invocation. Servant behaviour is defined as follows:

1. Determine correct method, and unmarshal parameters from InputStream.

2. Invoke method implementation.

3. If no user exception, create a normal reply using ResponseHandler.

4. If user exception occurred, create exception reply using ResponseHandler.

5. Marshal reply into OutputStream returned by ResponseHandler.

6. Return OutputStream to ORB.

Returns: The OutputStream created by the ResponseHandler which contains the marshalled reply
Parameters:
- method - The method name.
- input - The InputStream containing the marshalled arguments.
- handler - The ResponseHandler which the servant uses to construct a proper reply
Throws:
- SystemException - is thrown when invocation fails due to a CORBA system exception.