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MathGroup Archive 2005

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Re: JLink discover and link to an already running kernel from a Java App

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61651] Re: JLink discover and link to an already running kernel from a Java App
  • From: "Jens-Peer Kuska" <kuska at informatik.uni-leipzig.de>
  • Date: Mon, 24 Oct 2005 21:07:08 -0400 (EDT)
  • Organization: Uni Leipzig
  • References: <43570892.3010702@nrl.navy.mil> <djd013$erb$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

that would be a great idea. Say, you have an 
Mathematica Kernel that
does a 3 week symbolic computation and during this time
several Java application connect to the kernel and hinder
it to do it's work.

Your Java application may create a link
and you can take a running kernel and tell the kernel
to connect to the link generated by your Java 
application.

Regards
  Jens

"j michopoulos" <john.michopoulos at nrl.navy.mil> 
schrieb im Newsbeitrag 
news:djd013$erb$1 at smc.vnet.net...
| Another variation of my previous posting (see 
below) can be expressed as
| follows:
|
| Is it possible to detect from within a Java app 
if a Mathematica Kernel
| is already running and after that connect to it? 
If yes, how?
|
| I would enormously appreciate it if somebody 
could point me to an
| example or document that will shed some light on 
this, or,
| alternatively, share his/her experience on the 
subject.
|
| Thanks greatly,
|
| -john michopoulos
| ========================================
| John G. Michopoulos, Ph. D.
| Naval Research Laboratory,
| Center of Computational Material Science
| Special Projects Group, Code 6390.2
| Computational Multiphysics Systems Lab.
| 4555 Overlook Ave. SW, Washington DC 20375
| tel.202.767.2189
| e-mail: john.michopoulos at nrl.navy.mil
|
| j michopoulos wrote:
| > While one can use the ShareKernel[] call 
within mathematica to share one
| > kernel with multiple front-ends as explained 
in
| > 
http://support.wolfram.com/mathematica/mathlink/general/sharekernel.html,
| > I cannot find anywhere any info how to share a 
kernel that was started
| > by one instance of a Java App front end via a 
standard
| > MathLinkFactory.createKernelLink(...) call, 
and then be discovered by
| > another application or instance of the 
previous App to continue
| > expression evaluation under the original 
kernel.
| >
| > I have created Mathematica actors for the 
Ptolemy-II system
| > (http://ptolemy.eecs.berkeley.edu/ptolemyII/) 
that open and close the
| > kernel around the designated expression 
evaluation for the purpose of
| > automating theory generation, but now I need a 
variant of these actors
| > that exploit the same environment and that 
requires that they both
| > access the same Kernel which makes it a 
special case of he problem I
| > described in the previous paragraph.
| >
| > I would enormously appreciate any help along 
these lines..
| >
| >
| > -- john m.
| > ========================================
| > John G. Michopoulos, Ph. D.
| > Naval Research Laboratory,
| > Center of Computational Material Science
| > Special Projects Group, Code 6390.2
| > Computational Multiphysics Systems Lab.
| > 4555 Overlook Ave. SW, Washington DC 20375
| > tel.202.767.2189
| > e-mail: john.michopoulos at nrl.navy.mil
| >
| 



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