Error calling Java in Oracle Stored Procedure

Question

I can call a java function inside my Oracle Stored Procedure, but if I reference a class that uses JNI, I get problems. I don't know what forum to post this under. This seems the closest match.
Here is my error:
java.lang.NoClassDefFoundError
at AcmeComp.ec.Motor.<init>(Motor.java:35)
at BBOra.runBB(BBOra:13)
Here is my java class, BBOra.java:
import AcmeComp.ec.*;
class BBOra {
static String strCnt;
BBOra() {}
public static void runBB() {
try {
//Motor class is in AcmeComp.ec package
Motor eng = new Motor();
} catch(Exception e) {
System.out.println("Error: " + e);
public static void runNonBB() {
System.out.println("runNonBB works ok.");
From DOS prompt, I loaded ac222ec.jar (has the AcmeComp.ec package) and BBOra.java files into Oracle:
loadjava -u system/manager -resolve -verbose ac222ec.jar.java
loadjava -u system/manager -resolve -verbose BBOra.java
From SQL Plus, I created 2 stored sprocedures:
CREATE OR REPLACE PROCEDURE runBB
AS LANGUAGE JAVA
NAME 'BBOra.runBB()';
CREATE OR REPLACE PROCEDURE runNonBB
AS LANGUAGE JAVA
NAME 'BBOra.runNonBB()';
From SQL Plus, I gave myself permissions to load libraries, so I can load ac222ecjni.dll, which has all the Native (C++) code I use:
BEGIN
DBMS_JAVA.GRANT_PERMISSION('SYSTEM',
'java.lang.RuntimePermission',
'loadLibrary.*');
END;
From SQL Plus, I set up my output:
set SERVEROUTPUT ON;
CALL dbms_java.set_output(3000);
From SQL Plus, I called my Stored Procedures:
CALL runNonBB();
CALL runBB();
runNonBB() works great, but runBB() gives me the error I listed above. The Motor class that BBOra calls, itself calls a class NMotor, which has a call:
static {
System.loadLibrary("ac222ecjni");
Unfortunately, I don't know the inner workings of the native code. Does "at AcmeComp.ec.Motor.<init>(Motor.java:35)"? mean JServer was able to see the class "Motor", but not instatiate it? Or did it error trying to create the class "NMotor"?
Here's a snippet of Motor:
package AcmeComp.ec;
public class Motor implements IMotor {
public Motor() {
motor = new NMotor();
some functions
private NMotor motor;
Here's a snippet of NMotor:
package AcmeComp.ec;
class NMotor {
NMotor() {
sunjdk = true;
some native method declarations
private boolean sunjdk;
static {
//ac222ecjni.dll has all the Native (C++) code
System.loadLibrary("ac222ecjni");
PLEASE HELP ME FIGURE THIS OUT. IT IS KILLING ME. I can even look into the USER_OBJECTS view in Oracle and see that ALL of the classes from the ac222ec.jar are present and accounted for.

Answer 1

Man, I guess I figured it out myself. Ten Duke dollars to myself. But, for the sake of anyone who may want to know the answer, here it is:
JServer (or Oracle9i JVM in Oracle 9i) does not support JNI. Here is their (weak) reasoning, taken from "Oracle9i Java Developer's Guide" as found in http://www.csis.gvsu.edu/GeneralInfo/Oracle/java.920/a96656/invokeap.htm#1007948
"Oracle does not support the use of JNI in Oracle9i Java applications. If you use JNI, your application is not 100% pure Java, and the native methods require porting between platforms. Native methods have the potential for crashing the server, violating security, and corrupting data."
Sounds like a fancy way to say they have a limitation--their JVM isn't up to par all the way. If JNI is a feature in Java, why should Oracle decide for me if I should use it? Don't Java methods also have the potential for crashing the server, violating security, and corrupting data? I think they should just provide the functionality you would expect from a VM and let the user decide which functionality to use. In my case, I HAVE to use JNI, so I'd have to use RMI so that a different VM can do the JNI part.
Sounds pretty lame of Oracle, but oh well.