Hi folks,
I am a newbie ... I have been trying to do a simple .jsp page that
makes use of a JNI call to a simple HelloWorld .so lib. Here is what i
did..
1. Made a class called HelloWorld.java inside a package "cal" with a
native method displayHello()
2. compiled it with javac
->> gave me HelloWorld.class
3. created the header file using "javah -jni cal.HelloWorld"
->> this gave me cal_HelloWorld.h file
4 created a HelloWorldImp.c file ..included the header file and also
made the export line in the file reflect the package name
(i.e) Java_cal_HelloWorld_displayHello()
5. Compiled .c file using gcc -c -o libHello.o -I path to jdkincludes
6. built the shared object using "cc -shared -o libHello.so libHello.o"
7. exported LD_LIBRARY_PATH with the right path to the .so file dir
8. created a simple Foo.jsp file to have
try{
System.loadLibrary("Hello");
}catch( UnsatisfiedLinkError e){
}
new HelloWorld ().displayHello();
-----------------------
that's it... now all these works until i call the displayHello()
method from my HelloWorld class. I am sure the server is loading the
libHello.so file. But when I try to call the method that internally is
supposed to invoke the native method it fails with
UnsatisfiedLinkError. The same lib can be used with a simple
standalone java program and it WORKS FINE !! I am so lost with this
:o( Any help in this regard would be appreciated. Thanks in advance
for your time !
cheerz
-vaheesan
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