[Mapserver-users] MapScript and Servlet

[Sean Gillies]

On May 26, 2004, at 3:54 PM, Uchoa wrote:

>  Hi,
>
>  I'm working with RH 8, jakarta-tomcat-5.0.19 and MS 4.0.2. I compile 
> MapScript with Java and generate a mapscript.jar and libmapscript.so 
> (the last I put in /usr/local/lib). In Eclipse, I import the 
> mapscript.jar and I try to run the Servlet below to make a test but I 
> get a error.
>
> ###### ERROR ######
>
>
> exception
> javax.servlet.ServletException: Servlet execution threw an exception
>
>
> root cause
> java.lang.UnsatisfiedLinkError: new_mapObj
>         edu.umn.gis.mapscript.mapscriptJNI.new_mapObj(Native Method)
>         edu.umn.gis.mapscript.mapObj.<init>(mapObj.java:296)
>         HelloServlet.doGet(HelloServlet.java:39)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
>
>
> ####### SERVLET TO TEST ########
>
>  import  edu.umn.gis.mapscript.*;
>  import java.io.*;
>  import javax.servlet.http.*;
>  import javax.servlet.*;
>
>  public class HelloServlet extends HttpServlet {
>    public void doGet (HttpServletRequest req,
>                                           HttpServletResponse res)
>          throws ServletException, IOException
>    {
>      try
>              {
>                  System.loadLibrary("mapscript");
>                  System.err.println("Loaded the Mapscript library");
>              }
>              catch (UnsatisfiedLinkError e)
>              {
>                  e.printStackTrace();
>              }
>   
>        // mapscript
>        mapObj map;
>        map = new mapObj ("/var/www/html/itasca/demo.map");
>     
>          PrintWriter out = res.getWriter();
>          out.println("Hello, Brave new World!");
>          out.close();
>    }
>  }
>
> Anyone can help me?
>
>

Mr. Uchoa,

I'm not a Java expert, but isn't an UnsatisfiedLinkError a sign that 
your
libmapscript.so is not being found on your path?  Are you setting
LD_LIBRARY_PATH and passing it to Tomcat?

cheers,
Sean

--
Sean Gillies
sgillies at frii dot com
http://users.frii.com/sgillies