Hi!
I have a servlet that calls a native function (written in C++ that
generates sum of first n fibonacci numbers, n being the input
parameter). The servlet is called upon submission of .shtml file. I get
"500 Internal Server Error" when the form is submitted. The code for the
servlet and native function is given below.
------------- Native.java --------------
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
public class Native extends HttpServlet implements
javax.servlet.SingleThreadModel
{
//public native void test();
public native int fibonacci(int n);
public void init(ServletConfig config) throws ServletException
{
super.init(config);
}
public void doGet(HttpServletRequest request, HttpServletResponse
response) throws IOException, ServletException
{
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse
response) throws IOException, ServletException
{
System.out.println("Before native function");
System.loadLibrary("test2");
System.out.println("After loadLibrary"); //--> Till here, it's fine
int number=5;
int result=fibonacci(number); //--> Some problem here
System.out.println("Result: "+result);
//System.loadLibrary("Test2");
System.out.println("After native function");
}
}
------------- Native.java --------------
------------- try1.shtml --------------
<html>
<head>
<script language=JavaScript>
<!--
function btnSubmitOnClick()
{
//alert("Hello")
document.frmTest.action="servlet/Native"
document.frmTest.submit()
}
//-->
</script>
</head>
<body>
<form name=frmTest method=post>
<input type=submit value=Submit OnClick="return btnSubmitOnClick()">
</form>
</body>
</html>
------------- try1.shtml --------------
------------- test2.cpp --------------
// test2.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "jni.h"
#include "Native.h"
/* int main(int argc, char* argv[])
{
printf("Hello World!\n");
return 0;
} */
int fibo(int n)
{
if(n <= 1) return 0;
if(n == 2) return 1;
return fibo(n - 1) + fibo(n - 2);
}
JNIEXPORT jint JNICALL Java_Native_fibonacci(JNIEnv *env, jobject obj,
jint n)
{
printf("Inside JNI function");
return fibo(n);
}
------------- test2.cpp --------------
Can someone track where the problem lies?
Regards,
Manish
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