VMS Call

Introduction:

This is a Java library for calling functions in VMS shareable images using VMS calling convention.

Including nice wrappers for for VMS RTL and system services.

Caveat

This is only tested with:

• Alpha, HP VMS 8.4 & VSI VMS 8.4-L2, Java 1.5 and C 7.3
• I64, VSI VMS 8.4-L3, Java 8 and C 7.4

This is not tested with any other combination.

Requirements:

• Java
• C [to build JNI code]
• VMS Script package [optional - only for using JavaScript or Python for processing]

Install:

1. unzip vmscall-bin.zip
2. unzip -aa temp.zip
3. @fixup
4. copy SCAN_GLOBALS_FOR_OPTION.COM and JAVA$BUILD_OPTION.EXE from wherever they are to dir
5. @build

Use

From Java:

1. @setup
2. put /vmsjavacallpath/vmscall.jar and /vmsjavacallpath/record.jar in classpath of your application

From JVM JavaScript (Rhino):

1. @setup
2. put load("vmsjavacallpath:vms.js"); in top of .js files
3. run with jsshell command

From JVM Python (JPython):

1. @setup
2. put from vms import * in top of .py files
3. run with jpython command

From JVM Python (Jython):

1. @setup
2. put from vms import * in top of .py files
3. run with jython command

Layers:

The library is structured in different layers for different usage scenarios:

Yes. The many layers and especially the context switch between JVM and native come with a performance penalty.

License:

• All of my code is available under Apache 2.0 license.
• JUnit is available under EPL license - see web site.

Java Doc:

See documentation here.

Feedback:

For questions and comments send email to author arne@vajhoej.dk.

Contribute:

If you want to constribute then see here.