Distributed objects for a computer system

• US 6,587,736 B2
• Filed: 11/20/2001
• Issued: 07/01/2003
• Est. Priority Date: 03/26/1999
• Status: Expired due to Term

• Current Assignee: Panasonic Electric Works Company Limited (Panasonic Holdings Corporation)
• Original Assignee: emWare, Inc. (Panasonic Holdings Corporation)
• Inventors: Harper, William R. Jr., Howard, Michael L.
• Primary Examiner(s): Gordon, Paul P.
• Application Number:
  US10/006,438
• Publication Number:
  US 20020069258A1
• Time in Patent Office: 588 Days
• Field of Search: 700/2, 700/9, 700/231, 709/200, 709/201, 709/203, 709/213, 709/216, 709/223-226
• US Class Current: 700/2
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548

Abstract

A distributed object for use in a networked computer system including a host computer and a remote computer, where the remote computer is in electronic communication with a device, is disclosed in one embodiment of the present invention as including a first member component implemented and stored on the host computer, and a second member component implemented and stored on the host computer. The second member component is in electronic communication with the remote computer, and the second member component functions to access data on the remote computer. The distributed object may be part of an object hierarchy. The object hierarchy includes a base class having member data and functions common to a set of remote computers, where the base class is implemented and stored on the host computer. The object hierarchy may also include a first subclass derived from the base class. The first subclass may be implemented and stored on the host computer. This first subclass includes the second member component in electronic communication with the remote computer. The object hierarchy may also include a second subclass that alters the function of the object.

Claims

1. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods that relate to a plurality of devices;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods of the base class, where access to the set of methods is accomplished through communication with the host computer, the device class extending the base class with device-specific methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a subclass of the device class thereby inheriting the set of methods available through the device class, the device extension class refining the device class with modifications of the set of methods of the device class and adding extension device-specific methods.

2. The distributed object hierarchy of claim 1, wherein the remote computer further comprises a services list comprising information of certain services.

3. The distributed object hierarchy of claim 2, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

4. The distributed object hierarchy of claim 1, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

5. The distributed object hierarchy of claim 1, wherein the remote computer is an embedded computer.

6. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods that relate to a plurality of devices; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods of the base class, where access to the set of methods is accomplished through communication with the host computer, the device class extending the base class with device-specific methods.

7. The distributed object hierarchy of claim 6, wherein the remote computer further comprises a services list comprising information of certain services.

8. The distributed object hierarchy of claim 7, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

9. The distributed object hierarchy of claim 6, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

10. The distributed object hierarchy of claim 6, wherein the remote computer is an embedded computer.

11. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of methods that relate to a plurality of devices;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of methods of the first object, where access to the set of methods is accomplished through communication with the host computer, the device class implementing device-specific methods using the first object'"'"'s methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of methods of the second object.

12. The distributed object hierarchy of claim 11, wherein the device extension class refines the device class with modifications of the set of methods of the device class.

13. The distributed object hierarchy of claim 12, wherein the device extension class adds extension device-specific methods.

14. The distributed object hierarchy of claim 11, wherein the remote computer further comprises a services list comprising information of certain services.

15. The distributed object hierarchy of claim 14, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

16. The distributed object hierarchy of claim 11, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

17. The distributed object hierarchy of claim 11, wherein the remote computer is an embedded computer.

18. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of attributes that relate to a plurality of devices;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of attributes of the base class, where access to the set of attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific attributes; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a subclass of the device class thereby inheriting the set of attributes available through the device class, the device extension class refining the device class with modifications of the set of attributes of the device class and adding extension device-specific attributes.

19. The distributed object hierarchy of claim 18, wherein the remote computer further comprises a services list comprising information of certain services.

20. The distributed object hierarchy of claim 19, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

21. The distributed object hierarchy of claim 18, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

22. The distributed object hierarchy of claim 18, wherein the remote computer is an embedded computer.

23. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of attributes that relate to a plurality of devices; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of attributes of the base class, where access to the set of attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific attributes.

24. The distributed object hierarchy of claim 23, wherein the remote computer further comprises a services list comprising information of certain services.

25. The distributed object hierarchy of claim 24, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

26. The distributed object hierarchy of claim 23, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

27. The distributed object hierarchy of claim 23, wherein the remote computer is an embedded computer.

28. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of attributes that relate to a plurality of devices;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of attributes of the first object, where access to the set of attributes is accomplished through communication with the host computer, the device class implementing device-specific attributes using the first object'"'"'s attributes; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of attributes of the second object.

29. The distributed object hierarchy of claim 28, wherein the device extension class refines the device class with modifications of the set of attributes of the device class.

30. The distributed object hierarchy of claim 29, wherein the device extension class adds extension device-specific attributes.

31. The distributed object hierarchy of claim 28, wherein the remote computer further comprises a services list comprising information of certain services.

32. The distributed object hierarchy of claim 28, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

33. The distributed object hierarchy of claim 28, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

34. The distributed object hierarchy of claim 28, wherein the remote computer is an embedded computer.

35. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods and attributes that relate to a plurality of devices; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods and attributes of the base class, where access to the set of methods and attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific methods and device-specific attributes.

36. The distributed object hierarchy of claim 35, wherein the remote computer further comprises a services list comprising information of certain services.

37. The distributed object hierarchy of claim 36, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

38. The distributed object hierarchy of claim 35, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

39. The distributed object hierarchy of claim 35, wherein the remote computer is an embedded computer.

40. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of methods and attributes that relate to a plurality of devices;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of methods and attributes of the first object, where access to the set of methods and attributes is accomplished through communication with the host computer, the device class implementing device-specific methods and device-specific attributes using the first object'"'"'s methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of methods and attributes of the second object.

41. The distributed object hierarchy of claim 40, wherein the device extension class refines the device class with modifications of the set of methods and attributes of the device class.

42. The distributed object hierarchy of claim 41, wherein the device extension class adds extension device-specific methods and extension device-specific attributes.

43. The distributed object hierarchy of claim 40, wherein the remote computer further comprises a services list comprising information of certain services.

44. The distributed object hierarchy of claim 43, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

45. The distributed object hierarchy of claim 40, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

46. The distributed object hierarchy of claim 40, wherein the remote computer is an embedded computer.

47. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods of the base class, where access to the set of methods is accomplished through communication with the host computer, the device class extending the base class with device-specific methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a subclass of the device class thereby inheriting the set of methods available through the device class, the device extension class refining the device class with modifications of the set of methods of the device class and adding extension device-specific methods.

48. The distributed object hierarchy of claim 47, wherein the remote computer further comprises a services list comprising information of certain services.

49. The distributed object hierarchy of claim 48, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

50. The distributed object hierarchy of claim 47, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

51. The distributed object hierarchy of claim 47, wherein the remote computer is an embedded computer.

52. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods of the base class, where access to the set of methods is accomplished through communication with the host computer, the device class extending the base class with device-specific methods.

53. The distributed object hierarchy of claim 52, wherein the remote computer further comprises a services list comprising information of certain services.

54. The distributed object hierarchy of claim 53, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

55. The distributed object hierarchy of claim 52, further a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

56. The distributed object hierarchy of claim 52, wherein the remote computer is an embedded computer.

57. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of methods;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of methods of the first object, where access to the set of methods is accomplished through communication with the host computer, the device class implementing device-specific methods using the first object'"'"'s methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of methods of the second object.

58. The distributed object hierarchy of claim 57, wherein the device extension class refines the device class with modifications of the set of methods of the device class.

59. The distributed object hierarchy of claim 58, wherein the device extension class adds extension device-specific methods.

60. The distributed object hierarchy of claim 57, wherein the remote computer further comprises a services list comprising information of certain services.

61. The distributed object hierarchy of claim 60, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

62. The distributed object hierarchy of claim 57, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

63. The distributed object hierarchy of claim 57, wherein the remote computer is an embedded computer.

64. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of attributes;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of attributes of the base class, where access to the set of attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific attributes; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a subclass of the device class thereby inheriting the set of attributes available through the device class, the device extension class refining the device class with modifications of the set of attributes of the device class and adding extension device-specific attributes.

65. The distributed object hierarchy of claim 64, wherein the remote computer further comprises a services list comprising information of certain services.

66. The distributed object hierarchy of claim 65, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

67. The distributed object hierarchy of claim 64, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

68. The distributed object hierarchy of claim 64, wherein the remote computer is an embedded computer.

69. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of attributes; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of attributes of the base class, where access to the set of attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific attributes.

70. The distributed object hierarchy of claim 69, wherein the remote computer further comprises a services list comprising information of certain services.

71. The distributed object hierarchy of claim 70, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

72. The distributed object hierarchy of claim 69, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

73. The distributed object hierarchy of claim 69, wherein the remote computer is an embedded computer.

74. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of attributes;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of attributes of the first object, where access to the set of attributes is accomplished through communication with the host computer, the device class implementing device-specific attributes using the first object'"'"'s attributes; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of attributes of the second object.

75. The distributed object hierarchy of claim 74, wherein the device extension class refines the device class with modifications of the set of attributes of the device class.

76. The distributed object hierarchy of claim 75, wherein the device extension class adds extension device-specific attributes.

77. The distributed object hierarchy of claim 74, wherein the remote computer further comprises a services list comprising information of certain services.

78. The distributed object hierarchy of claim 77, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

79. The distributed object hierarchy of claim 74, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

80. The distributed object hierarchy of claim 74, wherein the remote computer is an embedded computer.

81. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a base class, the base class defining a set of methods and attributes; and

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a subclass of the base class thereby inheriting the set of methods and attributes of the base class, where access to the set of methods and attributes is accomplished through communication with the host computer, the device class extending the base class with device-specific methods and device-specific attributes.

82. The distributed object hierarchy of claim 81, wherein the remote computer further comprises a services list comprising information of certain services.

83. The distributed object hierarchy of claim 82, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

84. The distributed object hierarchy of claim 81, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

85. The distributed object hierarchy of claim 81, wherein the remote computer is an embedded computer.

86. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a class, the class defining a set of methods and attributes;

a second object implemented on the remote computer, the second object being an instantiation of a device class which is a client of the first object thereby using the set of methods and attributes of the first object, where access to the set of methods and attributes is accomplished through communication with the host computer, the device class implementing device-specific methods and device-specific attributes using the first object'"'"'s methods and attributes; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of methods and attributes of the second object.

87. The distributed object hierarchy of claim 86, wherein the device extension class refines the device class with modifications of the set of methods and attributes of the device class.

88. The distributed object hierarchy of claim 87, wherein the device extension class adds extension device-specific methods and extension device-specific attributes.

89. The distributed object hierarchy of claim 86, wherein the remote computer further comprises a services list comprising information of certain services.

90. The distributed object hierarchy of claim 89, wherein the distributed object hierarchy further comprises an enumeration of exported services, said exported services being a subset of said services.

91. The distributed object hierarchy of claim 86, further comprising a client computer networked to the host computer, and wherein the client computer comprises a monitoring application that monitors the remote computer using the distributed object hierarchy.

92. The distributed object hierarchy of claim 86, wherein the remote computer is an embedded computer.

93. A distributed object hierarchy for use in a networked computer system including a host computer and a remote computer, the remote computer being in electronic communication with a device, said distributed object hierarchy comprising:

a first object implemented on the host computer, the first object being an instantiation of a first class, the first class defining a set of first methods and first attributes;

a second object implemented on the host computer, the second object being an instantiation of a second class, the second class defining a set of second methods and second attributes;

a third object implemented on the remote computer, the third object being an instantiation of a device class which is a client of the first object and a client of the second object thereby using the set of first methods and first attributes of the first object and using the set of second methods and second attributes of the second object, where access to the sets of first and second methods and first and second attributes is accomplished through communication with the host computer, the device class implementing device-specific methods and device-specific attributes using the first object'"'"'s methods; and

a third object implemented on the host computer, the third object being an instantiation of a device extension class which is a client of the second object thereby using the set of methods and attributes of the second object.