Policy-based storage service federation method and apparatus

1. A method of performing policy-based storage service federation, the method comprising:

identifying whether or not a policy is applicable for a request received from a client by a request interceptor;

obtaining the policy by evaluating request information relating to the request and a policy status;

obtaining a customized set of storage services based on the policy;

requesting a service credential for the set of storage services;

authenticating the service credential;

adding service information and authorization to the request and transmitting the request to a storage manager;

transmitting the service information to an instance manager, the transmitting performed by a virtual storage resource interface;

discovering a service implementation class for each service based on the service information;

creating a service implementation class instance based on the discovered service implementation class and transmitting the service implementation class instance to the virtual storage resource interface; and

transmitting the request, a service privilege associated with the authorization, and the service implementation class instance to a task manager, the transmitting performed by the virtual storage resource interface.

2. The method of performing policy-based storage service federation according to claim 1 , further comprising:

processing tasks for a plurality of asynchronously accessed services and merging responses of the services, the processing and merging performed by the task manager; and

generating a final response for the client based on a response received from the task manager, the generating of the final response performed by the virtual storage resource interface.