Jwsdp+jni

Question

Hi
I have a little server side Class, which calls a c Library with jni under Linux
public class NagJniLibrary implements NagJniLibraryIF
  static
      System.loadLibrary("NagJniLibrary");
    public native double sin(double x);
}if I use ant to build the Service, I get the following error messages at Taget "run-wsdeploy"
ant build
Buildfile: build.xml
clean:
[delete] Deleting directory /home/j_shen/tmp/NagJniLibrary/build
prepare:
[echo] Creating the required directories....
[mkdir] Created dir: /home/j_shen/tmp/NagJniLibrary/build/nagservice
[copy] Copying 1 file to /home/j_shen/tmp/NagJniLibrary/build/nagservice
compile-service:
[echo] Compiling the server-side source code....
[javac] Compiling 3 source files to /home/j_shen/tmp/NagJniLibrary/build
generate-sei-service:
prepare:
[echo] Creating the required directories....
set-wscompile:
run-wscompile:
[echo] Running wscompile:
[echo] /home/j_shen/jwsdp-1.3/apache-ant/..//jaxrpc/bin/wscompile.sh -define -d build -nd build -classpath build config-interface.xml -model build/model.gz
[delete] Deleting: /home/j_shen/tmp/NagJniLibrary/build/NagJniLibraryService.wsdl
setup-web-inf:
[echo] Setting up build/WEB-INF....
[copy] Copying 4 files to /home/j_shen/tmp/NagJniLibrary/build/WEB-INF/classes/nagservice
[copy] Copying 1 file to /home/j_shen/tmp/NagJniLibrary/build/WEB-INF
[copy] Copying 1 file to /home/j_shen/tmp/NagJniLibrary/build/WEB-INF
[copy] Copying 1 file to /home/j_shen/tmp/NagJniLibrary/build/WEB-INF
prepare-dist:
[echo] Creating the required directories....
package-service:
[echo] Packaging the WAR....
[delete] Deleting: /home/j_shen/tmp/NagJniLibrary/dist/nag-jaxrpc-portable.war
[jar] Building jar: /home/j_shen/tmp/NagJniLibrary/dist/nag-jaxrpc-portable.war
set-wsdeploy:
process-war:
[delete] Deleting: /home/j_shen/tmp/NagJniLibrary/dist/nag-jaxrpc.war
prepare:
[echo] Creating the required directories....
set-wsdeploy:
run-wsdeploy:
[echo] Running wsdeploy:
[echo] /home/j_shen/jwsdp-1.3/apache-ant/..//jaxrpc/bin/wsdeploy.sh -o dist/nag-jaxrpc.war dist/nag-jaxrpc-portable.war
[exec] java.lang.reflect.InvocationTargetException
[exec] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[exec] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[exec] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[exec] at java.lang.reflect.Method.invoke(Method.java:324)
[exec] at org.apache.commons.launcher.ChildMain.run(ChildMain.java:269)
[exec] Caused by: java.lang.UnsatisfiedLinkError: no NagJniLibrary in java.library.path
[exec] at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1491)
[exec] at java.lang.Runtime.loadLibrary0(Runtime.java:788)
[exec] at java.lang.System.loadLibrary(System.java:834)
[exec] at nagservice.NagJniLibrary.<clinit>(Unknown Source)
[exec] at java.lang.Class.forName0(Native Method)
[exec] at java.lang.Class.forName(Class.java:219)
[exec] at com.sun.xml.rpc.tools.wsdeploy.EndpointCompileTool.classExists(EndpointCompileTool.java:80)
[exec] at com.sun.xml.rpc.tools.wsdeploy.EndpointCompileTool.afterHook(EndpointCompileTool.java:256)
[exec] at com.sun.xml.rpc.tools.wscompile.CompileTool.run(CompileTool.java:580)
[exec] at com.sun.xml.rpc.tools.wsdeploy.DeployTool.process(DeployTool.java:303)
[exec] at com.sun.xml.rpc.tools.wsdeploy.DeployTool.run(DeployTool.java:213)
[exec] at com.sun.xml.rpc.util.ToolBase.run(ToolBase.java:40)
[exec] at com.sun.xml.rpc.tools.wsdeploy.Main.main(Main.java:24)
[exec] ... 5 more
[exec] Result: 1
if I comment the "System.loadLibrary("NagJniLibrary")"; such as
static
     //System.loadLibrary("NagJniLibrary");
... it will be builded
Anyone can help me ? Thanks a lot.

Answer 1

Hi, i had the same Problem and decided to encapsulate the Native call with an RMI-Wrapper.
So my topology is now as follows:
httpClient --> WebService --> RMIServer --> C-library
I still have some Accesserrors while invoking the native Methods, but i'm sure this is some kind of Axis Security Problem.
If you got a solution for the problem, please let me know.
JAN