Method and apparatus for delivering local and remote server events in a similar fashion

• US 6,785,726 B1
• Filed: 05/08/2000
• Issued: 08/31/2004
• Est. Priority Date: 05/08/2000
• Status: Expired due to Term

• Current Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Original Assignee: Citrix Systems, Inc. (Cloud Software Group)
• Inventors: Pedersen, Bradley Jay, Freeman, Thomas D.
• Primary Examiner(s): Lim, Krisna
• Application Number:
  US09/567,456
• Time in Patent Office: 1,576 Days
• Field of Search: 709/318, 709/224, 709/225, 709/201, 709/227, 709/228, 719/318
• US Class Current: 709/227
• CPC Class Codes: G06F 2209/544 Remote
• CPC Class Codes: G06F 9/542 Event management; Broadcasting; Multicasting; Notifications
• CPC Class Codes: H04L 41/04 Network management architectures or arrangements
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 67/10 in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46

Abstract

The present invention relates to a method and apparatus for delivering events to local and remote servers. In one aspect, the invention relates to a method for communicating in a server system. The method includes the steps of providing a first server having a first plurality of subsystems and a first event bus, providing a second server having a second plurality of subsystems and a second event bus and posting to the first event bus, by one of the first plurality of subsystems, a local event having as its target another of the first plurality of subsystems. The method also includes the step of posting to the first event bus, by one of the first plurality of subsystems, a remote event having as its target one of the second plurality of subsystems.

In one embodiment, the method also includes the step of delivering, by the event bus, the local event to the target subsystem. In another embodiment, the method also includes the step of delivering, by the event bus, the remote event to a transport mechanism. In another embodiment, the method also includes the step of transmitting, by the transport mechanism, the remote event to the target subsystem using TCP/IP. In another embodiment, the method also includes the step of generating, by one of the first plurality of subsystems, an event for transmission to another subsystem.

Claims

1. A method for communicating in a server system comprising:

(a) providing a first server having a first plurality of subsystems and a first event bus;

(b) providing a second server having a second plurality of subsystems and a second event bus;

(c) posting to the first event bus, by one of said first plurality of subsystems, a local event having as its target another of said first plurality of subsystems;

(d) posting to the first event bus, by one of said first plurality of subsystems, a remote event having as its target one of the second plurality of subsystems;

(e) obtaining an identifier of the second server hosting the targeted subsystem of the second plurality from the posted remote event;

(f) determining the presence of a connection to the second server using the obtained identifier;

(g) querying a network-based service to determine the network address of the second server when no connection to the second server is present; and

(h) establishing a connection to the second server using the determined network address when no connection to the second server is present.

2. The method of claim 1 further comprising delivering, by the event bus, said local event to the target subsystem.

3. The method of claim 1 further comprising delivering, by the event bus, said remote event to a transport mechanism.

4. The method of claim 3 further comprising transmitting, by the transport mechanism, said remote event to the target subsystem using TCP/IP.

5. The method of claim 1 further comprising generating, by one of the first plurality of subsystems, an event for transmission to another subsystem.

6. The method of claim 1 further comprising determining, by the event bus, the target subsystem for a posted event.

7. The method of claim 6 wherein determining the target subsystem comprises determining, by the event bus, the target subsystem for a posted event using a dispatch table.

8. A client-server network comprising:

a first server including a first plurality of subsystems and a first event bus;

a second server including a second plurality of subsystems;

wherein one of said first plurality of subsystems posts to said first event bus a local event having as its target another of said first plurality of subsystems, posts to said first event bus a remote event having as its target one of the second plurality of subsystems, obtains an identifier of the second server hosting the targeted subsystem of the second plurality from the posted remote event, determines the presence of a connection to the second server using the obtained identifier, queries a network-based service to determine the network address of the second server when no connection to the second server is present, and establishes a connection to the second server using the determined network address when no connection to the second server is present.

9. The system of claim 8 wherein at least one subsystem on each server comprises a transport subsystem, said transport subsystem transmitting remote events to a target subsystem.

10. The system of claim 9 wherein said transport subsystem transmits remote events to a target subsystem using TCP/IP.

11. The system of claim 8 wherein a transport mechanism is associated with said event bus.

12. The system of claim 8 wherein said event bus delivers local events to a target subsystem.

13. The system of claim 8 wherein said event bus includes a dispatch table for determining the target for a posted event.

14. The system of claim 8 wherein said event bus comprises a data object.

15. The system of claim 8 wherein at least one of said subsystems comprises a data object.

16. An article of manufacture having embodied thereon computer-readable program means for communicating in a server system, the computer-readable programs means comprising:

computer-readable program means for providing a first plurality of subsystems and a first event bus on a first server;

computer-readable program means for providing a second plurality of subsystems and a second event bus on a second server;

computer-readable program means for posting to the first event bus, by one of said first plurality of subsystems, a local event having as its target another of said first plurality of subsystems;

computer-readable program means for posting to the first event bus, by one of said first plurality of subsystems, a remote event having as its target one of the second plurality of subsystems;

computer-readable program means for obtaining an identifier of the second server hosting the targeted subsystem of the second plurality from the posted remote event;

computer-readable program means for determining the presence of a connection to the second server using the obtained identifier;

computer-readable program means for querying a network-based service to determine the network address of the second server when no connection to the second server is present; and

computer-readable program means for establishing a connection to the second server using the determined network address when no connection to the second server is present.

17. The article of manufacture of claim 16 further comprising computer-readable program means for delivering, by the event bus, said local event to the target subsystem.

18. The method of claim 16 further comprising computer-readable program means for delivering, by the event bus, said remote event to a transport mechanism.

19. The method of claim 18 further comprising computer-readable program means for transmitting, by the transport mechanism, said remote event to the target subsystem using TCP/IP.

20. The method of claim 16 further comprising computer-readable program means for generating, by one of the first plurality of subsystems, an event for transmission to another subsystem.