Granted Patent B1

US 7,266,827 · App. 10/679,635 · Granted Sep 4, 2007

Abstract

Claims (46)

1. A processor-implemented method for exposing an application object model to web-based clients, comprising:

parsing each hyper-text transport protocol (HTTP)-form-processing request received from a client by a web server;

traversing objects in the application object model in response to each property names obtained from the HTTP-form-processing request;

wherein traversing includes comparing a property name from the request to a property name of an object defined in the application object model;

for a reference-type property of an object found in traversing the application object model, generating a unique identifier for the reference-type property, registering the unique identifier for the reference-type property in a collection, and returning a Uniform Resource Identifier (URI) that includes the unique identifier to the client;

maintaining each identifier in the collection according to a lifetime type associated with each identifier, wherein a short-lifetime type reference is controlled by client access to the short-lifetime type reference, and a long-lifetime type reference is controlled by an application object; and

returning to the client a value of a selected property of an object in the application object model in response to traversal of the application object model.

2. The method of claim 1 , further comprising initiating execution of a method of an object in response to a method name obtained from an HTTP-form-processing request.

3. The method of claim 1 , further comprising:

creating an event queue in response to a first keyword obtained from an HTTP-form-processing request;

registering, in response to a second keyword obtained from an HTTP-form-processing request, with the application objects to receive events generated by the application objects;

entering the events in the event queue; and

returning events in the event queue to the client in response to a third keyword obtained from an HTTP-form-processing request.

4. The method of claim 1 , further comprising aborting parsing of an HTTP-form-processing request in response to an annotated property associated with a property name obtained from the HTTP-form-processing request.

5. The method of claim 1 , further comprising converting a character string parameter in an HTTP-form-processing request to a value having a data type compatible with a property of a property name obtained from the HTTP-form-processing request and setting the property of the object to the value.

6. The method of claim 1 , wherein the URI is a globally unique identifier (GUID).

7. The method of claim 1 , further comprising removing a short-lifetime type reference from the collection if a client does not submit an HTTP-forms-processing request containing the URI for a selected period of time.

8. The method of claim 7 , further comprising maintaining long-lifetime type reference in the collection until a referenced application object is removed.

9. The method of claim 1 , further comprising:

configuring the web server arrangement with an initial object name associated with a name of an application object model; and

retrieving an object definition of the initial object name in response to the name of the application object model obtained from an HTTP-form-processing request.

10. A computing arrangement for exposing objects to web-based clients, comprising:

a web server arrangement that includes a data processing system configured with a web server;

an application object model hosted by the web server, the application object model containing the objects to be exposed;

a web objects model hosted by the web server, the web objects model configured to parse each hyper-text transport protocol (HTTP)-form-processing request received from a client by a web server, traverse objects in the application object model in response to property names obtained from the HTTP-form-processing request, wherein traversing includes comparing a property name from the request to a property name of an object defined in the application object model, generate, for a reference-type property of an object found in traversing the application object model, a unique identifier for the reference-type property, registering the unique identifier for the reference-type property in a collection, and return a Uniform Resource Identifier (URI) that includes the unique identifier to the client, maintain each identifier in the collection according to a lifetime type associated with each identifier, wherein a short-lifetime type reference is controlled by client access to the short-lifetime type reference, and a long-lifetime type reference is controlled by an application object, and return to the client a selected property of an object in the application object model in response to traversal of the application object model.

11. The arrangement of claim 10 , wherein the web objects model is further configured to initiate execution of a method of an object in response to a method name obtained from an HTTP-form-processing request.

12. The arrangement of claim 10 , wherein the web objects model is further configured to initiate a method to create an event queue in response to a first keyword obtained from an HTTP-form-processing request, and initiate a method to register, in response to a second keyword obtained from an HTTP-form-processing request, with the application objects to receive events generated by the application objects, and return events in the event queue to the client in response to a third keyword obtained from an HTTP-form-processing request.

13. The arrangement of claim 10 , wherein the web objects model is further configured to abort parsing of an HTTP-form-processing request in response to an annotated property associated with a property name obtained from the HTTP-form-processing request.

14. The arrangement of claim 10 , wherein the web objects model is further configured to convert a character string parameter in an HTTP-form-processing request to a value having a data type compatible with a property of a property name obtained from the HTTP-form-processing request and set the property of the object to the value.

15. The arrangement of claim 10 , wherein the URI is a globally unique identifier (GUID).

16. The arrangement of claim 10 , wherein the web objects model is further configured to remove a short-lifetime type reference from the collection if a client does not submit an HTTP-forms-processing request containing the URI for a selected period of time.

17. The arrangement of claim 16 , wherein the web objects model is further configured to maintain long-lifetime type reference in the collection until a referenced application object is removed.

18. The arrangement of claim 10 , further comprising:

an initial object name associated with a name of an application object model in the web server; and

wherein the web objects model is further configured to retrieve an object definition of the initial object name in response to the name of the application object model obtained from an HTTP-form-processing request.

19. An apparatus for exposing an application object model to web-based clients, comprising:

one or more data processing systems;

means for parsing each hyper-text transport protocol (HTTP)-form-processing request received from a client by a web server process hosted on the one or more data processing systems;

means for traversing objects in the application object model in response to property names obtained from the HTTP-form-processing request and for comparing a property name from the request to a property name of an object defined in the application object model as part of the traversing; and

means for generating, for a reference-type property of an object found in traversing the application object model, a unique identifier for the reference-type property, registering the unique identifier for the reference-type property in a collection, and for returning a Uniform Resource Identifier (URI) that includes the unique identifier to the client;

means for maintaining each identifier in the collection according to a lifetime type associated with each identifier, wherein a short-lifetime type reference is controlled by client access to the short-lifetime type reference, and a long-lifetime type reference is controlled by an application object; and

means for returning to the client a selected property of an object in the application object model in response to traversal of the application object model.

20. The apparatus of claim 19 , further comprising:

means for creating an event queue in response to a first keyword obtained from an HTTP-form-processing request;

means for registering, in response to a second keyword obtained from an HTTP-form-processing request, with the application objects to receive events generated by the application objects; and

means for returning events in the event queue to the client in response to a third keyword obtained from an HTTP-form-processing request.

Assignments (12)