I have
some tips from experience with both Win32 and AIX platforms. I'm assuming that
HP UK C dynamic link libraries are built similar to AIX
ones...?
- JDK
1.18 uses JNI version 1.0 bindings by default. Use the -jni option with javah to
create a JNI 1.1 style C headers. These are easier to link
with.
- Make
sure you use the generated header for the basis of the function implementation
(rather than copying by hand). This will ensure you get the function header
exactly right.
- The
unsatified link exception can occur for many reasons: the library is not found
(not on the LIBPATH for instance), the method wasn't resolved (not exported or
wrong signature in C)
Given
the following java class with natic methods:
package a.b;
public
class c {
public native void doSomething()
{}
public native void doSomethingElse()
{}
}
You
will need an export file with your so/shared library/DLL containing the mangled
function prototypes, For example, in foo.exp ( the export file for the
library foo.so ) I have: -
Java_a_b_c_doSomething
Java_a_b_c_doSomethingElse
This is the JNI 1.1 C export for the above
java code.
-----Original Message-----
From: Eric Lee (LYN) (EUS) [mailto:[EMAIL PROTECTED]]
Sent: 05 December 2000 14:45
To: '[EMAIL PROTECTED]'
Subject: Tomcat, JNI and HP-UXI am using Tomcat 3.1 on HP-UX 10.20 with Java version ("HP-UX Java C.01.18.03 05/12/2000 16:31:36 hkhd02") I am attempting to use a servlet that instantiates a class that contains JNI methods and I keep getting java.lang.UnsatisfiedLinkError exceptions when these native methods are accessed. The JNI methods execute fine from the command line with Java interpreter, I also know that the servlet is loading the shared library. There are similar postings in the mailing list archives but they are without response. If anyone has any comments, I sure would appreciate them.
Many Thanks,
Eric Lee
