Method and system for uniformly accessing multiple directory services

• US 5,893,107 A
• Filed: 07/01/1996
• Issued: 04/06/1999
• Est. Priority Date: 07/01/1996
• Status: Expired due to Term

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Kwan, Stuart L. S., Johnson, Margaret K., Ganugapati, Krishna, Watson, Colin, Judd, Steven G., Chan, Chuck Y.
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): RONES, CHARLES
• Application Number:
  US08/674,318
• Time in Patent Office: 1,009 Days
• Field of Search: 345/326, 707/10, 707/2, 707/103, 707/104, 395/200.03
• US Class Current: 1/1
• CPC Class Codes: G06F 16/289 Object oriented databases
• CPC Class Codes: Y10S 707/99944 Object-oriented database structure
• CPC Class Codes: Y10S 707/99945 Object-oriented database structure processing

Abstract

The present invention provides a directory service system for accessing a plurality of directory services in a uniform manner. Each directory service manages information relating to objects or that directory service. The type of information that a directory service manages for an object is defined by the object class of the object. An object class defines the properties (i.e., information) that a directory service manages for objects of that object class. Each property has a properly name and property type. A directory service has a property value for each property defined by the object class of each object. The directory service system comprises a schema browsing component, a name resolving component, a binding component, and an extending component. The schema browsing component controls the retrieving of the property name and property type of each property of each object class of each directory service. A client of the directory service system uses the schema browsing component to retrieve property names and property types of the object classes. The name resolving component controls the receiving of a unique identifier of an object within a directory service and the locating of the object within the directory service. The binding component controls the binding to an in-memory object representing a located object within a directory service. The extending component controls the defining of new object classes and new properties for each directory service. A client of the directory service system uses the extending component to define new object classes and new properties.

Claims

1. A directory service system for providing uniform access to a plurality of directory services, each directory service having information relating to the information for each object being defined by an object class, each object class defining properties, each property having a property name and property type, the information for each object being a property value for each property of its object class, comprising:

a schema browsing component for retrieving the property name and property type of each property of each object class of each directory service, wherein a client of the directory service system uses the schema browsing component to retrieve property names and property types of the object classes;

a name resolving component for receiving a unique identifier of an object within a directory service, for identifying the directory service that contains that information of the identified object, and for locating the object within the identified directory service;

a binding component for binding to an in-memory object representing a located object within the identified directory service; and

an extending component for defining new object classes and new properties for each directory service, wherein a client of the directory service system uses the extending component to define new object classes and new properties.

2. The directory service system of claim 1 wherein the in-memory object provides a pre-defined interface for retrieving the property values of the object to which the in-memory object is bound.

3. The directory service system of claim 1 wherein when the in-memory object is bound to an object that contains objects, the in-memory object provides a pre-defined interface for retrieving references to the contained objects.

4. The directory service system of claim 1 wherein the client uses the binding component to instantiate in-memory objects for access of the definition of an object class.

5. The directory service system of claim 1 including a namespaces in-memory object for enumerating each of the directory services.

6. The directory service system of claim 1 wherein each directory service is represented by a namespace in-memory object.

7. A computer system for accessing a plurality of diverse directory services in a uniform manner, each directory service having objects, each object having an object identifier, an object class, and a property value, comprising:

for each of the plurality of directory services,

an application programming interface, the application programming interface having binding functions for binding to an object of the directory service by receiving an object identifier and returning a reference to the identified object and schema functions for retrieving a definition of each object class; and

an implementation of pre-defined interfaces through which a client can access the objects of the directory service in a manner that is independent of the application programming interface of the directory service, the interfaces including an interface for accessing property values of each object and an interface for accessing the definition of each object class;

a namespaces interface for enumerating each directory service; and

a directory service browser for enumerating the directory services using the namespaces interface and for using the implementation of the pre-defined interfaces for an enumerated directory service to access the property values of objects of the directory service and to access the definitions of the object classes of the directory service wherein the directory server browser is independent of each directory service.

8. The computer system of claim 7 wherein the interface for accessing the definition of an object class includes a method for adding a definition of an object class to the directory service.

9. The computer system of claim 7 wherein each directory service provides an implementation of a default in-memory object to accommodate objects of newly added object classes.

10. The computer system of claim 7 wherein each object has a unique identifier and including a blinding function that, when passed an identifier of an object, determines which directly service contains the identified object and generates an in-memory data structure for storing the property values of that object.

11. A method in a computer system for accessing a plurality of directory services in a uniform manner, each directory service having an application programming interface, the application programming interface having a behavior for accessing objects of the directory service, the method comprising:

for each of a plurality of directory services, installing an implementation of a pre-defined interface, the pre-defined interface defining a behavior for accessing objects of the directory service, the implementation providing a mapping from the behavior of the application programming interface to the behavior of the pre-defined interface;

receiving an identification of an object;

determining, which directory service contains the identified object; and

using the installed implementation of the pre-defined interface for the determined directory service to locate and bind to the identified object

wherein a client can access each directory service using the implementation of the pre-defined interface for that directory service.

12. The method of claim 11 wherein each object has an object class and wherein the pre-defined interface defines a behavior for adding a definition of an object class to a directory service.

13. The method of claim 11 wherein each object has an object class and wherein the pre-defined interface defines a behavior for retrieving a definition of an object class of a directory service.

14. The method of claim 11 wherein the pre-defined interface defines a behavior for committing changes to objects to the directory service.

15. A computer-readable medium having instructions for causing a computer system to access a plurality of directory services in a uniform manner, each directory service having an application programming interface, the application programming interface having a behavior for accessing objects of the directory service, by:

for each a plurality of directory services, installing an implementation of a pre-defined interface, the pre-defined interface defining a behavior for accessing objects of the directory service, the implementation providing a mapping from the behavior of the application programming interface to the behavior of the pre-defined interface;

receiving an identification of an object, the identification of the object specifying the directory service that contains information relating to the object and specifying a path to the object within the specified directory service;

identifying the specified directory service; and

invoking a behavior of the implementation of the pre-defined interface of the identified directory service passing the specified path to the object, wherein the invoked behavior returns a reference to the located object; and

binding to the returned reference so that the information relating to the identified object can be obtained.

16. The computer-readable medium of claim 15 wherein each object has an object class and wherein the pre-defined interface defines a behavior for adding a definition of an object class to a directory service.

17. The computer-readable medium of claim 15 wherein each object has an object class and wherein the pre-defined interface defines a behavior for retrieving a definition of an object class of a directory service.

18. The computer-readable medium of claim 15 wherein the predefined interface defines a behavior for committing changes to objects to the directory service.