[vtkusers] VTKJava - UnsatisfiedLinkError in a servlet

[Roberto Gori]

Hello, vtkUsers!

 I am doing servlet programming. Inside the servlet I'm using certain
 kitware package classes vtk.jar.

class vrmlexporter {

  static { System.loadLibrary("vtkJava"); }

  static void export(String infile, String outfile, double thr) {
        vtkDataSetReader reader = new vtkDataSetReader();
        reader.SetFileName(infile);

        vtkContourFilter cf = new vtkContourFilter();
        //vtkMarchingCubes cf = new vtkMarchingCubes();
        cf.SetInput(reader.GetOutput());
        cf.SetValue(0, thr);
        cf.ComputeScalarsOff();

    vtkPolyDataMapper mapper = new vtkPolyDataMapper();
    mapper.SetInput(cf.GetOutput());

    vtkActor actor = new vtkActor();
    actor.SetMapper(mapper);

    vtkRenderer ren1 = new vtkRenderer();
    ren1.AddActor(actor);

    vtkRenderWindow renWin = new vtkRenderWindow();
    renWin.AddRenderer(ren1);

    vtkVRMLExporter vrml = new vtkVRMLExporter();
    vrml.SetRenderWindow(renWin);
    vrml.SetFileName(outfile);
    //vrml.SetSpeed(5.5);
    vrml.Write();
        }
}

The class compiles well, but when I
 run the servlet, it says the server gave an invalid response.

I found that the point where I instantiate any of the VTK classes,

it gives me an error during runtime. I check my classpath etc. It is all OK and loading vtkJava library causes no errors.

java.lang.UnsatisfiedLinkError: VTKInit
        at vtk.vtkDataSetReader.VTKInit(Native Method)
        at vtk.vtkObject.(vtkObject.java:97)
        at vtk.vtkProcessObject.(vtkProcessObject.java:78)
        at vtk.vtkSource.(vtkSource.java:82)
        at vtk.vtkDataReader.(vtkDataReader.java:259)
        at vtk.vtkDataSetReader.(vtkDataSetReader.java:50)
        at vrmlexporter.export(primo.java:1424)
        at primo.doGet(primo.java:169)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
        at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:404)
        at org.apache.tomcat.core.Handler.service(Handler.java:286)
        at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
        at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:797)
        at org.apache.tomcat.core.ContextManager.service(ContextManager.java:743)
        at org.apache.tomcat.service.connector.Ajp12ConnectionHandler.processConnection(Ajp12ConnectionHandler.java:166)
        at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
        at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:498)
        at java.lang.Thread.run(Thread.java:484)

 Could you please advice?

Thanks in advance.

    Roberto

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