Application server

• US 20020100038A1
• Filed: 10/01/2001
• Published: 07/25/2002
• Est. Priority Date: 03/18/1998
• Status: Active Grant

• Current Assignee: Implicit, LLC (Edward Balassanian)
• Original Assignee: Edward Balassanian
• Inventors: Balassanian, Edward
• Granted Patent: US 6,976,248 B2
• Time in Patent Office: Days
• US Class Current: 717/177
• 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 9/44526 Plug-ins; Add-ons
• CPC Class Codes: G06F 9/44589 Program code verification, e.g. Java bytecode verification, proof-carrying code high-level semantic checks G06F8/43; testing and debugging software G06F11/36
• CPC Class Codes: H04L 63/123 received data contents, e.g. message integrity
• CPC Class Codes: H04L 63/20 for managing network security; network security policies in general filtering policies H04L63/0227
• CPC Class Codes: H04L 67/02 based on web technology, e.g. hypertext transfer protocol [HTTP]
• 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
• CPC Class Codes: H04L 67/34 involving the movement of software or configuration parameters network booting or remote initial program loading [RIPL] G06F9/4416
• CPC Class Codes: H04L 67/568 Storing data temporarily at an intermediate stage, e.g. caching

Abstract

The present invention is an applet server which accepts requests for applets from client computers. A request specifies the format in which an applet is to be delivered to the requesting client computer. The applet server has a cache which it uses to store applets for distribution to client computers. If the specified form of the requested applet is available in the cache, the applet server transmits the applet to the requesting client. If the applet is not available in the cache, the server will attempt to build the applet from local resources (program code modules and compilers) and transformer programs (verifiers and optimizers). If the applet server is able to build the requested applet, it will then transmit the applet to the requesting client computer. If the applet server is unable to build the requested applet, it will pass the request to another applet server on the network for fulfillment of the request.

Claims

1. A method operating on a computer system for managing requests to a server computer for applets in a client server environment wherein each request for an applet specifies one form of the applet out of a plurality forms of the applet, comprising:

a) receiving on said server computer a request from a client computer for an applet in a form selected from a plurality forms;

b) compiling said applet into said selected form from a local resource comprising at least one source module and one compiler which acts on said source module to produce said selected form; and

c) transmitting said applet in said selected form to said client computer.

2. The method of claim 1, further comprising the step of:

copying said applet in said selected form to a local cache after compiling said applet from said local resource if said cache does not contain a copy of said applet in said selected form.

3. The method of claim 1, further comprising the step of:

transmitting a request to an external resource for supplying said applet in said selected form if said applet can not be compiled from said local resource and directing said external resource to transmit said applet in said selected form to said server computer.

4. The method of claim 2, further comprising the step of:

transmitting a request to an external resource for said applet in said selected form if a copy of said applet is not stored in said local cache and said applet can not be compiled from said local resource, and directing said external resource to transmit said applet in said selected form to said server computer.

5. A method operating on a computer system for managing requests to a server computer for applets in a client server environment wherein each request for an applet specifies one form of said applet out of a plurality of forms of said applet, comprising:

a) receiving on said server computer a request from a client computer for an applet in a specified form selected from a plurality of forms;

b) determining whether said applet is stored in said specified form in a local cache and, if so, transmitting said applet in said specified form to said client computer;

c) if said applet is not stored in said selected form in said local cache, compiling said applet into said selected form from a local resource comprising at least one source module and one compiler which acts on said source module to produce said selected form and transmitting said applet in said selected form to said client computer.

6. The method of claim 5, further comprising the step of:

copying said applet in said selected form to said cache after compiling said applet from said local resource if said cache does not contain a copy of said applet in said form.

7. The method of claim 5, further comprising the step of:

transmitting a request to an external resource for said applet in said selected form if a copy of said applet is not stored in said local cache and said applet can not be compiled from said local resources, and directing said external resource to transmit said applet in said selected form to said server computer.

8. The method of claim 6, further comprising the step of:

transmitting a request to an external resource for said applet in said selected form if a copy of said applet is not stored in said local cache and said applet can not be compiled from said local resource, and directing said external resource to transmit said applet in said form to said server computer.

9. A method operating on a computer system for generating an applet in response to a request by a client computer wherein each request for an applet specifies one form of the applet out of a plurality forms of the applet, comprising:

a) receiving on a server computer a request from a client computer for an applet in a form selected from a plurality forms;

b) compiling an applet program module into an intermediate form program module;

c) transmitting said applet in said selected form to said client computer.

10. The method of claim 9, further comprising the step of:

transforming said intermediate form program module into a transformed intermediate form program module with at least one transformer program.

11. The method of claim 10, wherein said at least one transformer program is selected from the group consisting of verifying computer programs, optimizing computer programs, compressing computer programs, debugging computer programs, usage monitoring computer programs and encrypting computer programs.

12. The method of claim 10, further comprising the step of:

compiling said transformed intermediate form program module into machine specific binary code with a target compiler.

13. The method of claim 11, further comprising the step of:

compiling said transformed intermediate form program module into machine specific binary code with a target compiler.