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тАО12-08-2004 07:42 PM
тАО12-08-2004 07:42 PM
using RTL routines and system services from java
does anyone have an example to how i can use
RTL (like lib$spawn) routines in java on openvms? and which packages need to be imported to use them?
i'm using java 1.4.2 SDK on OpenVMS 7.3-1
thanks
arik
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тАО12-08-2004 08:23 PM
тАО12-08-2004 08:23 PM
Re: using RTL routines and system services from java
You can write native C functions which will be a wraper to lib rtl routines.
There is a package called J2VMS which has all the VMS system services and LIB$ routines.
http://www.j2vms.co.uk/
I have only tried some examples so I cant say you how it works.
Bojan
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тАО11-13-2005 07:50 AM
тАО11-13-2005 07:50 AM
Re: using RTL routines and system services from java
Mike
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тАО11-13-2005 09:14 AM
тАО11-13-2005 09:14 AM
Re: using RTL routines and system services from java
But first ask yourself WHY you would use Java at all. Since you plan to use VMS-specific code, you make your code non-transportable to other platforms. Consider to use a native language (C++, but there are other object oriented langiages ported to VMS (Modula2, Ruby (i think)) that are outrun Java by far in terms of overall performance. Using Java for a VMS-only application is like shooting a midget - with a cannon.
OpenVMS Developer & System Manager
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тАО11-14-2005 08:51 AM
тАО11-14-2005 08:51 AM
Re: using RTL routines and system services from java
I can write the system services calls in C, then use JNI to call the C routines, but I wanted to see the J2VMS package, as it speeds up the learning process, and I possibly won't have to re-invent too many wheels.