Java Mapscript vs. Swig
José Vilson de Mello de Farias
vilson.farias at DIGITRO.COM.BR
Fri Sep 29 17:16:50 EDT 2006
Greetings,
I've compiled a Mapserver from the latest CVS code (Sept 29) and I'm
having some problems with Java Mapscript.
My system had been running fine until this afternoon, when I compiled
a new Mapserver from CVS code. I had to compile a new Swig version
before I could start.
The Mapserver compilation was fine, and I didn't get any erros. My
goal was the Java Mapscript, wich was sucessfully compiled and tested
with "make test". After I had deployed and restarted the Tomcat it
figured out that one of my example codes wasn't working anymore. The
code is very simple, please take a look :
protected void doPost(HttpServletRequest req, HttpServletResponse
resp) throws ServletException, IOException {
log.trace("doGet - request:" + req);
try {
PrintWriter p = resp.getWriter();
mapObj mapa = new
mapObj("/home2/java/tomcat/webapps/mapserver_wms/mapas/rio_grande_do_sul.map");
*
mapa.setMappath("/home2/java/tomcat/webapps/mapserver_wms/mapas/shapes_rio_grande_do_sul");*
imageObj image = mapa.draw();
File arqMapa = File.createTempFile("mapa", ".png", new
File("/home2/java/tomcat/webapps/mapserver_wms/image"));
log.debug("createTempFile " + arqMapa.getAbsolutePath());
arqMapa.deleteOnExit();
image.save(arqMapa.getAbsolutePath(), mapa);
resp.setContentType("text/html");
resp.getWriter().println("<img src=image/" + arqMapa.getName()
+ ">");
}
catch (Exception e) {
log.error(e.getLocalizedMessage(), e);
}
}
After I executed the code above on Firefox, the following error was
showed :
javax.servlet.ServletException: set_mapObj_mappath
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:293)
org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:161)
root cause
java.lang.UnsatisfiedLinkError: set_mapObj_mappath
edu.umn.gis.mapscript.mapscriptJNI.set_mapObj_mappath(Native Method)
edu.umn.gis.mapscript.mapObj.setMappath(mapObj.java:195)
After some tests I found that the problem had been caused by
*mapa.setMappath *code. It seems Swig wasn't able to create a proper
mapscript.jar/libmapscript.so. I checked the mapscript_wrap.c and the
corresponding method to mapa.setMappath was called
Java_edu_umn_gis_mapscript_mapscriptJNI_mapObj_*1*mappath_*1*set.
Although I have definitely no experience with Swig, those numbers "1" in
method name doesn't look ok. Is it ok? Could be the Swig the responsible
for this error?
If I remove the mapa.setMappath, everything works fine and my map is
shown in the browser.
I included some info about my Mapserver and system. By the way, I've
compiled every component of Mapserver instead of using Linux defaults.
*compiled packages *(we haven't used any RPMs, all packages were
manually compiled/installed)*
*libpng-1.2.12
freetype-2.2.1
zlib-1.2.3
gd-2.0.33
jpegsrc.v6b
tiff-3.8.2
libgeotiff-1.2.1
PDFlib-Lite-6.0.3
proj-4.4.9
curl-7.15.4
geos-2.2.3
gdal-1.3.2
swig-1.3.29
*Mapserver's configure *
./configure --prefix=/home2/mapserver --without-pdf --with-threads
--with-zlib=/home2/mapserver/zlib --with-png=/home2/mapserver/libpng
--with-tiff=/home2/mapserver/libtiff
--with-jpeg=/home2/mapserver/libjpeg
--with-freetype=/home2/mapserver/freetype
--with-proj=/home2/mapserver/proj4
--with-geos=/home2/mapserver/geos/bin/geos-config
--with-gd=/home2/mapserver/gd
--with-ogr=/home2/mapserver/gdal/bin/gdal-config
--with-gdal=/home2/mapserver/gdal/bin/gdal-config
--with-curl-config=/home2/mapserver/libcurl/bin/curl-config --with-wfs
--with-wcs --with-wmsclient --with-wfsclient --with-php=/usr/include/php
*Linux*
Linux dgtad 2.6.9-22.EL #1 Mon Sep 19 18:20:28 EDT 2005 i686 athlon i386
GNU/Linux
MAPSERVER_HOME=/home2/mapserver
PROJ_LIB=$MAPSERVER_HOME/proj4/share/proj
LD_LIBRARY_PATH=$LD_LIBRARY_PATH::/home2/mapserver/proj4/lib:/home2/mapserver/gdal/lib:/home2/mapserver/geos/lib:/home2/mapserver/libcurl/lib:/home2/mapserver/libpng/lib:/home2/mapserver/libjpeg/lib:/home2/mapserver/libtiff/lib:/home2/mapserver/libgeotiff/lib:/home2/mapserver/ogdi/lib:/home2/mapserver/freetype/lib:/home2/mapserver/gd/lib:/home2/mapserver/zlib/lib:/home2/mapserver/proj4/share/proj:$MAPSCRIPT_HOME
MAPSCRIPT_HOME=$MAPSERVER_HOME/mapscript
PATH=/usr/java/jre/bin:/usr/java/jdk/bin:$MAPSCRIPT_HOME
*Java
*JRE_HOME=/usr/java/jre
JAVA_HOME=/usr/java/jdk
JDBC_HOME=/usr/java/jdbc
CATALINA_HOME=/usr/java/tomcat
java version "1.5.0_07"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_07-b03)
Java HotSpot(TM) Client VM (build 1.5.0_07-b03, mixed mode, sharing)
*Tomcat*
Using CATALINA_BASE: /usr/java/tomcat
Using CATALINA_HOME: /usr/java/tomcat
Using CATALINA_TMPDIR: /usr/java/tomcat/temp
Using JRE_HOME: /usr/java/jre
Server version: Apache Tomcat/5.5.17
Server built: Apr 14 2006 02:08:29
Server number: 5.5.17.0
OS Name: Linux
OS Version: 2.6.9-22.EL
Architecture: i386
JVM Version: 1.5.0_07-b03
JVM Vendor: Sun Microsystems Inc.
*gcc*
gcc (GCC) 3.4.4 20050721 (Red Hat 3.4.4-2)
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*Swig*
SWIG Version 1.3.29
Compiled with g++ [i686-pc-linux-gnu]
Please see http://www.swig.org for reporting bugs and further information
I'd appreciate any help and thanks in advance.
Best regards,
--
*José Vilson de Mello de Farias*
/Analista de Sistemas
//SSE - Segurança Pública/
*DÍGITRO TECNOLOGIA*
*E-mail:* vilson.farias at digitro.com.br
<mailto:vilson.farias at digitro.com.br%20>
*Messenger: *vilsonfarias at hotmail.com
<mailto:vilson.farias at digitro.com.br%20>
*Fone:* (0xx48) 3281-7314
*Fax:* (0xx48) 3281-7000
*Site:* www.digitro.com.br <http://www.digitro.com.br%20>
<http://www.digitro.com.br%20>
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