Apparatus and method for processing servlets

• US 20030009519A1
• Filed: 05/28/2002
• Published: 01/09/2003
• Est. Priority Date: 05/30/1996
• Status: Active Grant

• Current Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Original Assignee: Sun Microsystems Incorporated (Oracle Corporation)
• Inventors: Gosling, James A., Connelly, David W., Diwanji, Pavani
• Granted Patent: US 7,171,446 B2
• Time in Patent Office: Days
• US Class Current: 709/203
• CPC Class Codes: G06F 9/445 Program loading or initiating bootstrapping G06F9/4401; security arrangements for program loading or initiating G06F21/57
• CPC Class Codes: G06F 9/465 Distributed object oriented systems remote method invocation [RMI] G06F9/548
• CPC Class Codes: G06F 9/4843 by program, e.g. task dispatcher, supervisor, operating system
• CPC Class Codes: G06F 9/54 Interprogram communication

Abstract

A method and apparatus for operating a local server computer of a client-server network includes a technique to receive a request from a client computer of the client-server network. A determination is made whether the request requires dynamically generated information from a servlet object of the client-server network. If so, a specified servlet object corresponding to the request may be uploaded from a remote server computer of the client-server network. The specified servlet object is then executed to obtain dynamically generated information corresponding to the request.

Claims

1. A method executed by a local server computer under the control of a program said local server computer including a memory for storing said program, said local server computer forming a portion of a client-server network, said method comprising the steps of:

receiving a request from a client computer of said client-server network;

determining that said request requires dynamically generated information from a servlet object of said client-server network;

uploading from a remote server computer of said client-server network a specified servlet object corresponding to said request; and

executing said specified servlet object to obtain dynamically generated information corresponding to said request.

2. The method of claim 1 further comprising the step of passing dynamically generated information from said specified servlet object to a web server operating on said local server computer, said passing step being facilitated with an application program interface.

3. The method of claim 2 wherein said application programming interface specifies techniques for performing at least one of the following operations:

initializing a servlet object, executing a servlet object, and destroying a servlet object.

4. The method of claim 2 wherein said specified servlet object and said application program interface are specified as object bytecodes in the JAVA programming language.

5. The method of claim 2 further comprising the step of sending said dynamically generated information from said web server to said client computer.

6. The method of claim 1 wherein said executing step includes the steps of executing said specified servlet in a security area of said local server computer;

and

passing said dynamically generated information from said security area to a non-security area of said local server computer.

7. The method of claim 1 wherein said local server computer stores a plurality of servlet objects, each of said servlet objects continuously operating until invoked in response to a specified request from a client computer.

8. The method of claim 7 wherein said plurality of servlet objects pass data to one another.

9. The method of claim 7 wherein said selected servlet objects of said plurality of servlet objects are instantiated at the start-up of said local server computer.

10. The method of claim 7 wherein selected servlet objects of said plurality of servlet objects are instantiated in response to a demand from said client computer.

11. The method of claim 7 wherein selected servlet objects of said plurality of servlet objects are instantiated in response to an activated servlet URL.

12. The method of claim 11 wherein said servlet URL includes arguments.

13. The method of claim 1 wherein said receiving step includes the step of storing said request in a connection queue.

14. The method of claim 13 wherein said determining step includes the step of selecting a handler thread from a pool of handler threads to execute said determining step.

15. The method of claim 14 further comprising the step of operating said pool of handler threads by selectively creating a new handler thread and destroying an old handler thread.

16. The method of claim 15 wherein said operating step includes the step of reusing a buffer memory space of said old handler thread for said new handler thread.

18. The apparatus of claim 17 further comprising a fifth set of instructions to pass, through an application program interface, dynamically generated information from said specified servlet object to a web server operating on said local server computer.

19. The apparatus of claim 18 further comprising a sixth set of instructions to pass said dynamically generated information from said web server to said client computer.

20. The apparatus of claim 17 further comprising a seventh set of instructions to store a plurality of servlet objects on said server computer, each of said servlet objects continuously operating until invoked in response to a specified request from a client computer.

21. The apparatus of claim 20 wherein said seventh set of instructions include instructions to pass data between said plurality of servlet objects.

26. The apparatus of claim 20 wherein said fifth set of instructions include instructions to pass data between said plurality of servlet objects.

17. A computer readable memory that can be used to direct a server computer of a client-server computer network to function in a specified manner, comprising:

a first set of instructions to receive a request from a client computer of said client-server network;

a second set of instructions to determine that said request requires dynamically generated information from a servlet object of said client-server network;

a third set of instructions to upload from a remote server computer of said client-server network a specified servlet object corresponding to said request; and

a fourth set of instructions to execute said specified servlet object to obtain dynamically generated information corresponding to said request.

22. A computer readable memory that can be used to direct a server computer of a client-server computer network to function in a specified manner, comprising:

a first set of instructions to receive a request from a client computer of said client-server computer network;

a second set of instructions to determine that said request requires dynamically generated information from a servlet object of said server computer;

a third set of instructions to execute said specified servlet object to obtain dynamically generated information corresponding to said request; and

a fourth set of instructions to pass said dynamically generated information to said client computer.

23. The apparatus of claim 22 wherein said second set of instructions include instructions to interpret a servlet URL corresponding to said request.

24. The apparatus of claim 22 wherein said second set of instructions include instructions to interpret a servlet URL with arguments.

25. The apparatus of claim 22 further comprising a fifth set of instructions to store a plurality of servlet objects on said server computer, each of said servlet objects continuously operating until invoked in response to a specified request from a client computer.

28. The apparatus of claim 27 further comprising a remote server computer storing a set of servlet objects that can be passed to said server computer.

29. The apparatus of claim 27 wherein said server computer stores a plurality of servlet objects, each of said servlet objects continuously operating until invoked in response to a specified request from said client computer.

30. The apparatus of claim 29 wherein said plurality of servlet objects pass data between themselves.

27. A client-server computer network, comprising:

a client computer to generate a request; and

a server computer to

determine that said request requires dynamically generated information from a servlet object of said server computer,

execute said specified servlet object to obtain dynamically generated information corresponding to said request, and

pass said dynamically generated information to said client computer.