[scilab-Users] Scilab called within a Java thread

[Sylvestre Ledru]

Hello, 

Which version of Scilab are you using ? What do you mean by "crashes" ?

Due to constraints with Scilab family 5, Javasci is not designed to
manage several versions of Scilab at the same time. This has been
reported here: http://bugzilla.scilab.org/show_bug.cgi?id=6069
However, you should get an error saying that Scilab is already started.

Sylvestre


Le vendredi 06 mai 2011 à 11:08 -0700, scheiber a écrit :
> Hi,
> 
> My problem is the Scilab calling within a Java thread. The bellow example
> works when the  number of threads (noThreads) is 1 but increasing this
> number it crashes.
> 
> import org.scilab.modules.javasci.Scilab; 
> import org.scilab.modules.types.ScilabType;
> import org.scilab.modules.types.ScilabDouble;
> import java.util.concurrent.*; 
> 
> public class TestThreadScilab{
>   static Scilab sci;
>   static int noThreads=1;
>   
>   public static void main(String... args){
>     try{
>       sci=new Scilab();
>     }
>     catch(org.scilab.modules.javasci.JavasciException e) {
>       System.err.println("An exception occured: " +
> e.getLocalizedMessage());
>       System.exit(1);
>     } 
>     ExecutorService executor=Executors.newFixedThreadPool(noThreads);
>     for(int i=0;i<noThreads;i++){
>       Fir fir=new Fir(i);
>       executor.execute(fir); 
>     }
>     try{
>       executor.shutdown();
>       while(!executor.isTerminated());
>       sci.close();
>     }
>     catch(Exception e){} 
>     System.out.println("Finished");    
>   }
>   
>   static class Fir extends Thread{
>     private int index;
>     
>     Fir(int index){
>       this.index=index;
>     }
>     
>     public void run(){
>       System.out.println("Thread "+index+" started");
>       try{
>         if(sci.open()){
>           double ind=index*1.0d;
>           ScilabDouble sci_ind=new ScilabDouble(ind);
>           sci.put("u",sci_ind);
>           sci.exec(new String[]{"v=u+10","disp(v)"});
>           ScilabDouble sci_v=(ScilabDouble)sci.get("v");
>           if(!sci_v.isEmpty()){
>             double[][] v=sci_v.getRealPart();
>             System.out.println("Index "+index+" : "+v[0][0]);
>           }
>         }
>         else{
>           System.out.println("Could not start Scilab ");
>         }
>       } 
>       catch(org.scilab.modules.javasci.JavasciException e) {
>         System.err.println("An exception occured: " +
> e.getLocalizedMessage());
>       }
>     }
>   }
> }
> 
> 
> 
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