JNI - Anyone?

[ssamayoa]

Hi,

I'm interested on writing Java to RMS interface but before proceeding I would like ask this questions:

1. Did such interface (Java to RMS) exists? I don't want to reinvent the wheel!
2. Have someone did JNI in OpenVMS x86? If so, some advice appreciated.

[arne_v]

I have dabbled a bit in JNI on VMS. Alpha, Itanium and x86-64.



I have done stuff at 3 levels.

1) Pure JNI.

This is documented in various documentation.

I have also written about it a few times, including:

https://www.vajhoej.dk/arne/articles/call2.html#jvm_jni

https://www.vajhoej.dk/arne/articles/vm ... tml#gr2nat (actually Groovy not Java, but the JNI stuff is all the same)

2) VMSCALL.

I have a Java library for calling native function residing in a VMS shareable image.

(it calls some JNI code that use LIB$FIND_IMAGE_SYMBOL and LIB$CALLG to do the actual call)

Deep dive here:

https://www.vajhoej.dk/arne/articles/vmstd17.html

3) ISAM.

I have a Java library for accessing VMS RMS index-sequential files based on annotations on fields in a class.

Mentioned here:

http://www.vajhoej.dk/arne/articles/nosql1.html#vms

And used here:

https://www.vajhoej.dk/arne/articles/vmstd3.html
https://www.vajhoej.dk/arne/articles/vmstd6.html
https://www.vajhoej.dk/arne/articles/vmstd9.html

(mostly from Jython, but the mapping is all Java)

[ssamayoa]

Cool!

IMHO would be nice to have all those stuff in github.