Information handling system, method, and article of manufacture including persistent, distributed object name services including shared properties

• US 5,873,092 A
• Filed: 12/14/1995
• Issued: 02/16/1999
• Est. Priority Date: 12/14/1995
• Status: Expired due to Term

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Cheng, Philip Yen-Tang, Copeland, George P., High, Robert Howard Jr., Kumar, Vinoj Narayan
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): Coby, Frantz
• Application Number:
  US08/572,696
• Time in Patent Office: 1,160 Days
• Field of Search: 395/600, 395/614, 395/200.03, 395/425, 395/612, 395/601, 371/20.1, 364/900, 364/419, 370/60, 707/103, 707/104, 707/101, 707/102, 707/100
• 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

An information handling system includes one or more work stations, each work station including one or more processing units, a memory system, and one or more I/O controllers all connected to a system bus, the I/O controllers controlling various input/output devices such as a keyboard, a mouse, a display device, communications adapters and the like, an operating system control means employing object oriented technology, and means for providing a persistent, distributed object name service. An object class is modeled as a set of relationships. One or more files are constructed which exist in the file system, each of the files capturing the semantics of the naming context objects.

Claims

1. An information handling system, comprising:

one or more work stations, each work station comprising;

one or more processors;

a storage system;

one or more I/O controllers;

a system bus connecting the processors, the storage system and the I/O controllers;

an operating system program for controlling operation of the information handling system; and

an object based program operating in association with the operating system program for controlling execution of program modules representing one or more objects, the object based program comprising;

means for establishing a name resolution context,

means for binding a plurality of objects to said name resolution context, and

means for mapping said name resolution context to a persistent, distributed object name service having a relational structure.

2. A system according to claim 1, wherein the means for mapping a persistent, distributed object name service further comprises:

means for mapping name, property, object bindings.

3. A system according to claim 2, wherein the means for mapping a persistent, distributed object name service further comprises:

means for creating a bind file for an object to be bound if a bind file does not exist;

means for creating a stringified object reference of the object to be bound; and

means for inserting a record in the bind file.

4. A system according to claim 3, wherein the means for inserting a record further comprises:

means for inserting a name and a stringified reference in the bind file.

5. A system according to claim 2, wherein the object based program further comprises:

means for creating a name context file if a name context file does not exist for an object to be bound;

means for building a key comprising a binding name and a property name;

means for building a key-value comprising a sharable flag and a property value; and

means for inserting the key and the key value in the name context file.

6. A system according to claim 1, further comprising:

means for resolving a source name to an extended naming context;

means for stringifying the extended naming context;

means for creating a name context shared file, if a name context shared file does not exist;

means for building a key comprising a binding name and a property name;

means for building a key-value comprising a stringified reference;

means for informing an extended naming context to update a shared-by list to include a target extended naming context and target name.

7. A system according to claim 6, further comprising:

means for creating a name context shared-by file, if one does not exist;

means for building a key comprising a name and a property name;

means for stringifying a passed naming context;

means for building a key value comprising a stringified reference obtained from the means for stringifying; and

means for inserting a record comprising the key and the key value in the name context shared-by file.

8. A system according to claim 1, further comprising:

means for determining if a specified property is a local property; and

means for determining if the specified property is shared.

9. A system according to claim 8, wherein the means for determining if a specified property is a local property further comprises:

means for looking up the name context shared file to determined if it is shared;

means for unsharing the name context file by making the property local if the property is a shared property; and

means for deleting the local property by removing an associated entry from the name context local file.

10. A system according to claim 8, wherein the means for determining if a specified property is a shared property further comprises:

means for informing an owner that the property is being removed; and

means for deleting a shared property by a corresponding removing entry from the name context shared file.

11. A system according to claim 1, further comprising:

means for resolving a name by searching a name context bind file and converting an obtained stringified object reference to an object reference; and

means for obtaining a local property in the name context local file if the property is a shared property.

12. A computer readable medium, comprising:

means for modeling a naming context object state as a set of relations;

means for managing a persistent distributed object name service using a preexisting record database, said means for managing having;

means for mapping the set of relations to the preexisting record database, said means for mapping including;

means for binding a name to an object in a first relation;

means for associating one or more properties with the name in a second relation; and

means for sharing one or more properties among one or more objects in a third and a fourth relation.

13. A computer readable medium according to claim 12, wherein said means for binding comprises:

means for creating a bind file for an object to be bound if a bind file does not exist;

means for creating a stringified object reference of the object to be bound; and

means for inserting a record in the bind file.

14. A computer readable medium, according to claim 13, wherein the means for inserting a record further comprises:

means for inserting a name and a stringified reference in the bind file.

15. A computer readable medium according to claim 12, wherein said means for associating comprises:

means for creating a name context file if a name context file does not exist for a object to be bound;

means for building a key comprising a binding name and a property name;

means for building a key-value comprising a sharable flag and a property value; and

means for inserting the key and the key value in the name context file.

16. A computer readable medium according to claim 12, wherein said means for sharing comprises:

means for resolving a source name to an extended naming context;

means for stringifying the extended naming context;

means for creating a name context shared file, if a name context shared file does not exit;

means for building a key comprising a binding name and a property name;

means for building a key-value comprising a stringified reference; and

means for informing an extended naming context to update a shared-by list to include a target extended naming context and target name.

17. A computer readable medium according to claim 16, wherein said means for informing comprises:

means for creating a name context shared-by file, if one does not exist;

means for building a key comprising a name and a property name;

means for stringifying a passed naming context;

means for building a key value comprising a stringified reference obtained from said means for stringifying; and

means for inserting a record comprising the key and the value in the name context shared-by file.

18. A computer readable medium according to claim 12, further comprising means for removing a specified property.

19. A computer readable medium according to claim 18, wherein said means for removing comprises:

means for determining if the specified property is a local property; and

means for determining if the specified property is shared.

20. A computer readable medium, according to claim 19, wherein the means for determining if a specified property is a shared property further comprises:

means for informing an owner that the property is being removed; and

means for deleting a shared property by a corresponding removing entry from the name context shared file.

21. A computer readable medium according to claim 12, further comprising means for obtaining a property.

22. A computer readable medium according to claim 21, wherein said means for obtaining a property comprises:

means for resolving a name by searching a name context bind file and converting an obtained stringified object reference to an object reference; and

means for obtaining a local property in the name context local file if the property is a shared property.

23. A computer implemented method for managing a distributed name service, the method comprising the steps of:

modeling a naming context object state as a set of relations;

managing a persistent distributed object name service by mapping said set of relations to a preexisting record database by;

binding a name to an object in a first relation;

associating one or more properties with the name in a second relation; and

sharing one or more properties among one or more objects in a third and a fourth relation.

24. A method according to claim 23, wherein said binding step comprises the steps of;

creating a bind file for an object to be bound if a bind file does not exist;

creating a stringified object reference of the object to be bound; and

inserting a record in the bind file.

25. A method, according to claim 24, wherein the step of inserting a record further comprises the step of:

inserting a name and a stringified reference in the bind file.

26. A method according to claim 23, wherein said associating step comprises the steps of:

creating a name context file if a name context file does not exist for an object to be bound;

building a key comprising a binding name and a property name;

building a key-value comprising a sharable flag and a property value; and

inserting the key and the key value in the name context file.

27. A method according to claim 23, wherein said sharing step comprises the steps of:

resolving a source name to an extended naming context;

stringifying the extended naming context;

creating a name context shared file, if a name context shared file does not exist;

building a key comprising a binding name and a property name;

building a key-value comprising a stringified reference; and

informing an extended naming context to update a shared-by list to include a target extended naming context and target name.

28. A method according to claim 27, wherein said informing step comprises:

creating a name context shared-by file, if one does not exit;

building a key comprising a name and a property name;

stringifying a passed naming context;

building a key value comprising stringified reference obtained from the stringifying step; and

inserting a record comprising the key and the key value in the name context shared-by file.

29. A method according to claim 23, further comprising the step of removing a specified property.

30. A method according to claim 29, wherein said removing step comprises the steps of:

determining if the specified property is a local property; and

determining if the specified property is shared.

31. A method, according to claim 30, wherein the determining if a specified property is a shared property step further comprises the steps of:

informing an owner that the property is being removed; and

deleting a shared property by a corresponding removing entry from the name context shared file.

32. A method according to claim 23, further comprising the step of obtaining a property.

33. A method according to claim 32, wherein said step of obtaining a property comprises the steps of:

resolving a name by searching a name context bind file and converting an obtained stringified object reference to an object reference; and

obtaining a local property in the name context local file if the property is a shared property.