Deploying java applications in resource constrained environments

• US 7,849,459 B2
• Filed: 11/04/2004
• Issued: 12/07/2010
• Est. Priority Date: 11/04/2004
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Klein, David, Lillie, Brian Thomas, Watson, Thomas J., Schumacher, Daniel Mark, Burkhart, Michael John
• Primary Examiner(s): Dam; Tuan Q
• Assistant Examiner(s): Lee; Marina
• Application Number:
  US10/981,255
• Publication Number:
  US 20060101453A1
• Time in Patent Office: 2,224 Days
• Field of Search: 717/174
• US Class Current: 717/174
• CPC Class Codes: G06F 8/60 Software deployment

Abstract

Methods, systems, and products are provided for deploying Java applications in resource constrained environments. Embodiments include identifying a resource constraint of a target system and filtering the Java application in dependence upon the identified resource constraint. In many embodiments, identifying a resource constraint of a target system includes identifying limited runtime processing capabilities of the target system and filtering the Java application in dependence upon the identified resource constraint includes preprocessing a tag library of the Java application. In some embodiments, preprocessing a tag library is carried out by identifying a tag library descriptor of the Java application and copying a listener from the tag library descriptor to a deployment descriptor for the Java application.

Claims

1. A computer-implemented method for deploying an application in a resource constrained environment, the application comprising a computer program written in the Java®

computer programming language, the method comprising;

identifying a resource constraint of a target system including identifying a target system having limited processing capacity;

filtering the application in dependence upon the identified resource constraint including;

preprocessing a tag library of the application, including identifying a tag library descriptor of the application and copying a listener from the tag library descriptor to a deployment descriptor for the application;

identifying a hierarchy of classes of the application stored in a single file;

storing each class of the hierarchy as a separate file accessible to the application; and

identifying to a runtime platform the copying of the listener from the tag library descriptor to the deployment descriptor, including setting a flag in the application.

2. The method of claim 1 wherein:

identifying a resource constraint of a target system further comprises identifying that the target system has no Extensible Markup Language (XML) parser; and

filtering the application in dependence upon the identified resource constraint, including replacing a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

3. The method of claim 2 further comprising identifying to a runtime platform the replacing of a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

4. The method of claim 1 further comprising decompressing the single file containing the hierarchy of classes.

5. An apparatus for deploying an application in a resource constrained environment, the application comprising a computer program written in the Java®

computer programming language, the apparatus comprising a computer processor, a computer memory operatively coupled to the computer processor, the computer memory having disposed within it computer program instructions capable of;

identifying a resource constraint of a target system including identifying a target system having limited processing capacity;

filtering the application in dependence upon the identified resource constraint including;

preprocessing a tag library of the application, including identifying a tag library descriptor of the application and copying a listener from the tag library descriptor to a deployment descriptor for the application;

identifying a hierarchy of classes of the application stored in a single file;

storing each class of the hierarchy as a separate file accessible to the application; and

identifying to a runtime platform the copying of the listener from the tag library descriptor to the deployment descriptor, including setting a flag in the application.

6. The apparatus of claim 5 wherein:

identifying a resource constraint of a target system further comprises identifying that the target system has no Extensible Markup Language (XML) parser; and

filtering the application in dependence upon the identified resource constraint, including replacing a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

7. The apparatus of claim 6 further comprising computer program instructions capable of identifying to a runtime platform the replacing of a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

8. The apparatus of claim 5 further comprising computer program instructions capable of decompressing the single file containing the hierarchy of classes.

9. A computer program product for deploying an application in a resource constrained environment, the application comprising a computer program written in the Java®

computer programming language, the computer program product disposed on a computer-readable recording medium, the computer program product comprising computer program instructions capable of;

identifying a resource constraint of a target system including identifying a target system having limited processing capacity;

filtering the application in dependence upon the identified resource constraint including;

preprocessing a tag library of the application, including identifying a tag library descriptor of the application and copying a listener from the tag library descriptor to a deployment descriptor for the application;

identifying a hierarchy of classes of the application stored in a single file;

storing each class of the hierarchy as a separate file accessible to the application; and

identifying to a runtime platform the copying of the listener from the tag library descriptor to the deployment descriptor, including setting a flag in the application.

10. The computer program product of claim 9 wherein:

identifying a resource constraint of a target system further comprises identifying that the target system has no Extensible Markup Language (XML) parser; and

filtering the application in dependence upon the identified resource constraint, including replacing a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

11. The computer program product of claim 10 further comprising computer program instructions capable of identifying to a runtime platform the replacing of a static XML deployment descriptor for the application with a deployment descriptor readable without an XML parser.

12. The computer program product of claim 9 further comprising computer program instructions capable of decompressing the single file containing the hierarchy of classes.