Providing information to an isolated hosted object via system-created variable objects

• US 8,214,799 B2
• Filed: 07/08/2004
• Issued: 07/03/2012
• Est. Priority Date: 07/08/2004
• Status: Expired due to Fees

• Current Assignee: Microsoft Technology Licensing LLC (Microsoft Corporation)
• Original Assignee: Microsoft Corporation
• Inventors: Haselden, J. Kirk
• Primary Examiner(s): Zhen, Li
• Assistant Examiner(s): Lee, Marina
• Application Number:
  US10/886,835
• Publication Number:
  US 20060010419A1
• Time in Patent Office: 2,917 Days
• Field of Search: 717/120, 717/102
• US Class Current: 717/120
• CPC Class Codes: G06F 8/24 Object-oriented
• CPC Class Codes: G06F 9/54 Interprogram communication

Abstract

A system-created variable object may expose a property of an object model to an internal object that does not have access to the object model directly. The system-created variable object may provide a mechanism for communicating the external state of an object model to an internal member (object) without exposing the object model to the internal object. This feature enables an object model object to be isolated, a concept that can be advantageously exploited.

Claims

1. A system for providing information from a property source to an isolated hosted object in an object model, the information in the property source being inaccessible to the isolated hosted object, the system comprising:

a data storage medium in an execution environment comprising a package enclosing a container, the package configured to transform data from a plurality of data sources to a plurality of data destinations, the package associated with a collection of properties and system environment information, the collection of properties and system environment information stored in the property source, the container comprising a host object that comprises the isolated hosted object, the host object configured to wrap the isolated hosted object for execution within the host object and to isolate the isolated hosted object such that the container, the package enclosing the container, and other portions of the object model are not accessible to the isolated hosted object, the isolated hosted object being associated with a functionality of the package; and

a processor that has executable instructions for the execution environment creating a variable object therein, transmitting the information from the property source to the isolated hosted object via the variable object in response to a request from the isolated host object, the information comprising information about the collection of properties and system environment information, the variable object being configured for storing a value associated with the information from the property source to be communicated to the isolated hosted object.

2. The system of claim 1, wherein the container further comprises a data transformation service package connection for providing system environmental information to the isolated hosted object via one or more system-created variable objects wherein the system environmental information comprises at least counters, enumerators, environment variables and execution parameters of the container.

3. The system of claim 1, wherein the host object is a task host.

4. The system of claim 1, wherein the isolated hosted object is a task.

5. The system of claim 1, wherein the host object is a connection host.

6. The system of claim 1, wherein the isolated hosted object is a connection.

7. The system of claim 1, wherein the host object is a logging provider host.

8. The system of claim 1, wherein the isolated hosted object is a logging provider.

9. The system of claim 1, wherein the isolated hosted object comprises a task, the task referencing a connection manager.

10. A method for providing information from a property source to an isolated hosted object disposed in a host object that is disposed in a container of an execution environment, the information in the property source being inaccessible to the isolated hosted object, the method comprising:

instantiating the execution environment, the execution environment instantiating a package, the package configured to transform data from a plurality of data sources to a plurality of data destinations, the package associated with a collection of properties and execution environment information, the collection of properties and execution environment information stored in the property source, the package comprising a container, the container instantiating the host object, the host object instantiating at least one isolated hosted object, the host object configured to wrap the isolated hosted object for execution within the host object and to isolate the isolated hosted object such that the container, the package enclosing the container, and portions of an object model comprising the execution environment, the container, the host object, and the isolated hosted object are inaccessible to the isolated hosted object, the isolated hosted object being associated with a functionality of the package;

requesting the information from the property source for the isolated host object, the information in the property source being inaccessible by the isolated hosted object, the information comprising at least the collection of properties associated with the package;

generating, in response to the request, a variable object in the execution environment that is accessible to the isolated host object;

storing by the execution environment values associated with the requested information from the property source in the system variable object; and

providing the values to the isolated hosted object via the variable object.

11. The method of claim 10, wherein the execution environment is an application runtime.

12. The method of claim 10, wherein the container is a data transformation service package.

13. The method of claim 10, wherein the isolated hosted object is a task host.

14. The method of claim 10, wherein the isolated hosted object is a task.

15. The method of claim 10, wherein the isolated hosted object comprises a set of functionality in a data transformation service.

16. A computer-readable storage medium comprising computer-executable instructions for

instantiating an execution environment, the execution environment instantiating a package, the package configured to transform data from a plurality of data sources to a plurality of data destinations, the package associated with a collection of properties and execution environment information, the collection of properties and execution environment information stored in a property source, the package comprising a container, the container instantiating a host object, the host object instantiating at least one hosted object, the host configured to wrap the isolated hosted object for execution within the host object and to isolate the isolated hosted object such that the container, the package enclosing the container, and portions of an object model comprising the execution environment, the container, the host object, and the isolated hosted object are inaccessible to the isolated hosted object, the isolated hosted object being associated with a functionality of the package;

requesting the information from the property source for the isolated host object, the information in the property source being inaccessible to the isolated hosted object, the information comprising at least the collection of properties associated with the package;

generating, in response to the request, a variable object in the execution environment that is accessible to the isolated host object;

storing by the execution environment values associated with the requested information from the property source in the system variable object; and

providing the values to the isolated hosted object via the variable object.

17. The computer-readable storage medium of claim 16, comprising further computer-executable instructions for updating the variable object in response to a change in the information not directly accessible to the hosted object.