Cannot create dll with JNI

hi all,
i have a c++ coding for a softphone. I opened that file in vc++ and i'm able to create a .exe file from that.
the .exe file is running fine( it is searching for the server and is getting registered there).
now i wanted to add jni to it.
so i have written a java program to one of the methods in the c++ program( void pjstart() ), compiled it and created a header file.
now i replaced the c++ function with the stuff generated in the header file,( JNIEXPORT void JNICALL Java_test_pjstart(JNIEnv *env, jobject jobj) )
now i'm unable to build that file in vc++. it is showing some errors..

You need to start by creating a dll project in VC using a wizard. That should compile, build and you can even load it in java although it won't do anything.
Then you implement the signatures provided in the h file that you get from javah.

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JNI: experience in creating DLLs with G++ (mingw32)?

Hello.
I'm trying to create a DLL:
--------------/HelloWorld.cpp/------
#include <jni.h>
#include "HelloWorld.h"
#include <stdio.h>
JNIEXPORT void JNICALL
Java_HelloWorld_displayMessage(JNIEnv *env, jobject obj)
printf("Hello world!\n");
return;
I previously created 'HelloWorld.java'
class HelloWorld
public native void displayMessage();
static
System.loadLibrary("HelloWorldImp");
I created 'HelloWorld.class'.
I created the header file 'HelloWorld.h':
c:> javah -jni HelloWorld
But I do not have any idea to create the DLL.
I tried with:
c:> g++ -I"D:\j2sdk\include" -I"D:\j2sdk\include\win32" HelloWorld.cpp -shared -o HelloWorldImp.dll
But I get this error message when calling from 'Main.java':
Exception in thread "main" java.lang.UnsatisfiedLinkError: displayMessage
at HelloWorld.displayMessage(Native Method)
at Main.main(Main.java:6)
In order to get this message I created 'Main.java':
class Main
public static void main(String[] args)
HelloWorld hello = new HelloWorld();
hello.displayMessage();
Does anybody have any experience in creating DLLs with G++???
Thank you very much.

Or is it better GCC?

Create dll with arrays and call it

I am trying to create dll with labview in order to pass a 2d array to the main program. The problem is that I don't really know how to create the function to call it (I don't know much about pointers)
The function I have created to call the dll is void Untitled1(TD1Hdl *Array1) which is suposse to return the array created on it.
For example, in the program attached, how should I do to pass the array to another program using dlls?
Thanks a lot,
Juanlu
Attachments:
Untitled 1.vi ‏7 KB

The code you've provided doesn't do anything (just a control wired to an indicator) so I'm not sure what you're asking here.
If I understand correctly, you want to build a DLL from your LabVIEW VI. From what language will you call that DLL? There is no standard way to pass a 2-D array. If you can convert to a 1-D array, you can use a simple pointer. With a 2-D array, you're stuck with LabVIEW's array representation (the TD1Hdl type), which means that whatever code calls that function will need to understand the LabVIEW data type and how to manipulate it.

ERROR: Cannot create authcontext with null org-Naming query failed code:21

I use OpenSSO Enterprise 8.0 Update 1 Patch1 Build 6.1(2009-June-9 12:56)
I try to evaluate the Apache 2.2 web agent.
It's been installed without errors, and both the OpenSSO and Apache server restarted.
The agent profile's been created. Also, I use the default (OpenDS) configuration repository
for OpenSSO, but an external (DSEE) user data directory.
I think I did all the required steps with regards to both directories, since I don't see any error
in the LDAP logs, each entry seems to be found as expected, the BIND operations are all
successfull.
Also, I use a sub-realm rather than the default top realm, and thus, I've modified the agent configuration
(in the agent profile) so that the login URL is now ... /UI/Login?realm=myrealm
When I try to access the Apache homepage, I get an error 500. The most recent OpenSSO server log file
(...../opensso/debug/Authentication) contains the following message:
ERROR: Cannot create authcontext with null org
The most recent agent log file (....../apache22_agent/Agent_001/logs/debug/amAgent) has the following error:
2009-07-07 17:08:11.992 Error 10513:80149a50 PolicyEngine: am_policy_evaluate: InternalException in Service::update_policy with error message:Naming query failed. and code:21
I don't know what else I can do to debug this problem and find a solution. Any idea ?

Thank you Shubba,
With all available log details enabled, I now have the following messages on the agent side:
2009-07-09 10:14:51.731MaxDebug 5613:80149a50 all: No value specified for key com.sun.identity.agents.config.profile.attribute.mapping, using default value .
2009-07-09 10:14:51.731 Debug 5613:80149a50 NamingService: BaseService::doRequest(): Using server: http://portable.antibes.net:8080/opensso/namingservice.
2009-07-09 10:14:51.731MaxDebug 5613:80149a50 NamingService:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<RequestSet vers="1.0" svcid="com.iplanet.am.naming" reqid="10">
<Request><![CDATA[
<NamingRequest vers="3.0" reqid="2" sessid=""AQIC5wM2LY4SfcyaGFgc5h9Y7/kpf4f//ml82oVfNlbWxQE=@AAJTSQACMDE=#""> <GetNamingProfile> </GetNamingProfile> </NamingRequest>]]> </Request>
</RequestSet>
2009-07-09 10:14:51.712MaxDebug 5613:80149a50 NamingService: BaseService::sendRequest Request line: POST /opensso/namingservice HTTP/1.0
2009-07-09 10:14:51.712 Debug 5613:80149a50 NamingService: BaseService::sendRequest Cookie and Headers =Host: portable.antibes.net
2009-07-09 10:14:51.712 Debug 5613:80149a50 NamingService: BaseService::sendRequest Content-Length =Content-Length: 334
2009-07-09 10:14:51.712 Debug 5613:80149a50 NamingService: BaseService::sendRequest Header Suffix =Accept: text/xml
Content-Type: text/xml; charset=UTF-8
2009-07-09 10:14:51.712MaxDebug 5613:80149a50 NamingService: BaseService::sendRequest(): Total chunks: 7.
2009-07-09 10:14:51.712MaxDebug 5613:80149a50 NamingService: BaseService::sendRequest(): Sent 7 chunks.
2009-07-09 10:14:51.728 Debug 5613:80149a50 NamingService: HTTP Status = 500 (Internal Server Error)
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Http::Response::readAndParse(): Reading headers.
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Server: Apache-Coyote/1.1
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Content-Type: text/html;charset=utf-8
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Date: Thu, 09 Jul 2009 08:14:51 GMT
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Connection: close
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Http::Response::readAndParse(): Reading body content of length: 13830487939496281954
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 all: Connection::waitForReply(): returns with status success.
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: Http::Response::readAndParse(): Completed processing the response with status: success
2009-07-09 10:14:51.729MaxDebug 5613:80149a50 NamingService: <html><head><title>Apache Tomcat/6.0.18 - Error report</title><style></style> </head><body><h1>HTTP Status 500 - </h1><HR size="1" noshade="noshade">type Exception reportmessage description The server encountered an internal error () that prevented it from fulfilling this request.exception <pre>javax.servlet.ServletException: AMSetupFilter.doFilter
com.sun.identity.setup.AMSetupFilter.doFilter(AMSetupFilter.java:117)
</pre>root cause <pre>java.lang.NullPointerException
com.iplanet.services.naming.service.NamingService.processRequest(NamingService.java:361)
com.iplanet.services.naming.service.NamingService.process(NamingService.java:352)
com.iplanet.services.comm.server.PLLRequestServlet.handleRequest(PLLRequestServlet.java:180)
com.iplanet.services.comm.server.PLLRequestServlet.doPost(PLLRequestServlet.java:134)
javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
com.sun.identity.setup.AMSetupFilter.doFilter(AMSetupFilter.java:91)
</pre>note The full stack trace of the root cause is available in the Apache Tomcat/6.0.18 logs.<HR size="1" noshade="noshade"><h3>Apache Tomcat/6.0.18</h3></body></html>
2009-07-09 10:14:51.729 Warning 5613:80149a50 NamingService: BaseService::doHttpPost() failed, HTTP error = 500
2009-07-09 10:14:51.729 Debug 5613:80149a50 NamingService: NamingService()::getProfile() returning with error code HTTP error.
2009-07-09 10:14:51.729 Error 5613:80149a50 PolicyEngine: am_policy_evaluate: InternalException in Service::update_policy with error message:Naming query failed. and code:21
In my Tomcat server (OpenSSO server web container), I have the following errors:
Jul 9, 2009 10:12:35 AM org.apache.catalina.startup.Catalina start
INFO: Server startup in 22746 ms
[Fatal Error] :2:46: Element type "NamingRequest" must be followed by either attribute specifications, ">" or "/>".
java.lang.NullPointerException
at com.iplanet.services.naming.service.NamingService.processRequest(NamingService.java:361)
at com.iplanet.services.naming.service.NamingService.process(NamingService.java:352)
at com.iplanet.services.comm.server.PLLRequestServlet.handleRequest(PLLRequestServlet.java:180)
at ...
It seems like the problem comes from the couple of closing square brackets in the NamingRequest tag:
</NamingRequest>]]>
I don't know where it comes from, so if you've an idea I'd enjoy .
Cheers,

How to use VS2005 dlls with jni?

Hello,
I have a java application using jni and some dlls.
Previously this dlls were created using VS2003. Now I want to use VS2005 and I
encountered some problems.
Everything is working on my station were I have installed VS2005 but when I try to run the
application on other station (a test station) is not working.
I get the following error:
java.lang.UnsatisfiedLinkError: C:\App\Test.dll: This application has failed to start because
the application configuration is incorrect. Reinstalling the application may fix this problem
     at java.lang.ClassLoader$NativeLibrary.load(Native Method)
     at java.lang.ClassLoader.loadLibrary0(Unknown Source)
     ......First I tried to search all the dependences and copied all missing dlls from my work station to the test
station in the application directory. Still not working.
when dlls were made with VS2003 I had only 3 dependences: mfc71d, msvcp71d, msvcr71d. With this dlls in
the application directory everything was fine.
Second I tried to install .Net framework(2.0) and vcredist (VS2005_sp1) but still nothing.
What I'm doing wrong? Is somebody which is using dlls made in VS2005 with jni?
Thank you
,Dragos

IIRC, that message means the manifest file in the DLL points to assembly that your computer doesn't have, or it has no manifest file.
You either need to:
-recompile using static linking so that it has no dependencies
-stick the correct manifest in
-include the entire SxS (site by side) assembly folders with your application (only the ones you're dependent on). These are found in something similar to:
C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\redist\x86

Cannot create playlist with new OS

I just updated my touch (3rd generation) to OS5.1.1 and now I cannot create a playlist on my device. I used to be able to just right click on the music folder under my device and create a playlist that I could drag music into, but now that doesn't happen at all. I cannot create a playlist at all on my device unless I create it the itunes window and then move the entire playlist to my device. The problem with this is that I can't add any new music to the playlist once it's there, and I can't delete anything either. I'm really frustrated by this...how can I create a playlist like I could before where it was so simple and I could just drag whatever I wanted into it? Help me please!!

I just updated my touch (3rd generation) to OS5.1.1 and now I cannot create a playlist on my device. I used to be able to just right click on the music folder under my device and create a playlist that I could drag music into, but now that doesn't happen at all. I cannot create a playlist at all on my device unless I create it the itunes window and then move the entire playlist to my device. The problem with this is that I can't add any new music to the playlist once it's there, and I can't delete anything either. I'm really frustrated by this...how can I create a playlist like I could before where it was so simple and I could just drag whatever I wanted into it? Help me please!!

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Hi, I'm trying to create this view in SQLPlus:
SELECT order_no, SUM(cut_qty),
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How can I create it using parameters with no values at design time?
Thanks.
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if you want something like :
select * from emp $where_clause;
you can write a procedure with parameter and run it as dynamic sql for example
create or replace procedure pr1 ( p_where varchar2) is
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execute immediate 'create or replace view view_name as select * from emp '|| p_where;
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/then run it on sql*plus
SQL> exec pr1('where deptno = 10');
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HTH
Ghulam

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actual I try Raptor build 919 and I have a problem with creating sequences with NOCACHE using the wizzard.
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Help creating .dll with c using JNI

Hi. I have created a JNI application that uses C to call Java. Now, I am trying to create the .dll for windows. I am using VS C++ compiler. My program compiles; however, it doesn't seem to start the JVM. I am not sure how to pass the arguments in VS C++ while builiding and running. Please let me know. Thanks.

Hey,
Thanks. I apologize for not being clear. I have created the dll file and an application that links to that dll and executes the code. It creates the .exe file and when I execute it, it goes through the sample() function that just prints "Hello", and then it goes through the startJVM() function where the JVM is intended to start; however, the status of JVM is returning -1. It's not able to start JVM. I have included the path for the jvm.dll and jvm.lib. But, still won't work. Please reply with suggestions/comments. Thanks again.

How to use a C# dll with JNI

After a ton of issues, I finally got this working properly. I've come across a lot of forum posts about the various problems and VERY few answers so I thought I would post my solution here.
To do this, you need to create a managed C++ layer in between C# and java. The JNI functions in C++ dll can make calls to the C# dll directly, and your java program can make calls directly to the native JNI functions. Some important notes on using C# classes in C++ are:
-gcroot<CSClass ^> should be used on any objects that are instances of some C# class.
-the symbol ^ should be used with all C# references (its the symbol for references)
-gcnew should be used to allocate C# objects
-in visual studio, add the C# dll as a reference rather than using #using <CsDLL.dll>
-do not use #using <CsDLL.dll>
The next issue is loading the libraries. By adding the folder your C++ dll is located in to the Djava.library.path VM argument, you can load your C++ library with System.LoadLibrary("Cppdll.dll"). You DO NOT need to load the C# dll in your java program. In fact, it will ignore you if you try. The problem with loading this dll is with how the CLR searches for referenced assemblies. The CLR First searches the DEVPATH environment variable (if the machine.config file has developer mode set to on), then it searches the GAC, then it searches the codebases, then it searchs the current executable's directory along with a list of definable subdirectories (probes).
DEVPATH is a decent option, but it requires modifying the machine.config file to be in developer mode. Once that is done, it acts just like the PATH environment variable.
If your C# dlls are strongly named, I would recommend adding them to the GAC or using codebases. However I have not done this and am not sure how.

Hi,
i have to use a c# dll in my java program .by following this link http://www.codeproject.com/KB/cross-platform/javacsharp.aspx i done that.but it is working for only one c# program.if i am trying to use a dll it is throwing error
# An unexpected error has been detected by Java Runtime Environment:
# Internal Error (0xe0434f4d), pid=3988, tid=3704
# Java VM: Java HotSpot(TM) Client VM (11.0-b16 mixed mode, sharing windows-x86)
# Problematic frame:
# C [kernel32.dll+0x442eb]
# An error report file with more information is saved as:
# D:\Work\EclipseWorkspace\HelloInflux\hs_err_pid3988.log
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
Please help me out. i want a few steps to invoke a c# dll by using jni

Access to DLLs with JNI??

Hi All,
I�ve just created a DLL in VC++ version 6
I�m using simulation packages to access functions within this DLL, this runs just fine.
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How can I get my java application to access the DLL functions as well?
If I use JNI my simulation models don�t recognise the functions anymore.
Is there any other way of accessing my DLLs without using JNI?
Any solution would be much appreciated.
John.

No luck this time either:
Here is the code that I'm using
(1)
//hello.java
class HelloWorld
public native long displayHelloWorld();
static
System.loadLibrary("control_unit");
public static void main(String[] args)
long temp = 0;
temp = new HelloWorld().displayHelloWorld();
System.out.println("The returned value is "+temp);
(2)
// HelloWorldImp.c
#include "stdafx.h"
#include<stdlib.h>
#include<stdio.h>
#include<iostream.h>
#include "jni.h"
#include "HelloWorld.h"
BOOL APIENTRY DllMain( HANDLE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved )
return TRUE;
DWORD WINAPI returnValue()
return 8;
JNIEXPORT jlong JNICALL
Java_HelloWorld_returnValue(JNIEnv *env, jobject obj)
return (jlong)returnValue();
(3)
//Generated File
/* DO NOT EDIT THIS FILE - it is machine generated */
#include "jni.h"
/* Header for class HelloWorld */
#ifndef IncludedHelloWorld
#define IncludedHelloWorld
#ifdef __cplusplus
extern "C" {
#endif
* Class: HelloWorld
* Method: displayHelloWorld
* Signature: ()J
JNIEXPORT jlong JNICALL Java_HelloWorld_displayHelloWorld
(JNIEnv *, jobject);
#ifdef __cplusplus
#endif
#endif
(4)
//Commands used
javac hello.java
javah HelloWorld
cl -Ic:\jdk1.2.2\include -Ic:\jdk1.2.2\include\win32 -LD HelloWorldImp.c -Fecontrol_unit.dll
However I usually build the dll in VC++ ver 6 as this allows my dlls to work with my sim models
I only use the CL to get the JNI working
And when I try to run the java application I get the following: -
Exception in thread "main" java.lang.UnsatisfiedLinkError: displayHelloWorld
at HelloWorld.main(hello.java:13)
Which is "temp = new HelloWorld().displayHelloWorld();" in hello.java
Any reason as to why it's not working?
If you have any questions please let me know and I'll get back to you.
Am I building the dll in the wrong manner?
Thanks again,
John.

How to create dll with visual c++ 6.0

I have create two file ( file.h, file.cpp)
I make a new project in visual c++ 6.0, to make dll wizard.
and then I add code (file.h, file.cpp) in this project. But when i build it has a error.: fatal error C1010: unexpected end of file while looking for precompiled header directive.
help me...

Hi,
For me, when I make the .dll file with Visual C++, I used the cl.exe to do the job. Open the dos command, type cl then see the option, you should soon find out the solution, for futher question, you can email me at [email protected] and I will reply you as soon as possible.
With my best,
Zike Huang(jim)

USING AN EXISTING C++ DLL WITH JNI

I'm under Unix Solaris with the CC compiler.
I have a C++ DLL, called "libtest.so", that I would like to execute from Java thanx to JNI.
I have built a wrapper DLL, called "libwrapper.so", that contains my native method.
"libwrapper.so" talks properly with Java when I don't link it with "libtest.so" and "libtest.so" runs properly when I call it from a main function in C++.
But as I want to link them (with the option -ltest in the compilation command that I launch to get "libwrapper.so"), I get the following message error when I execute my java application : "Can't load library libwrapper.so "
How can I link "libwrapper.so" and "libtest.so" to get a wrapper
DLL that is loadable by Java ?
Can you help me to solve my problem ?
Thanx
Steph

Every native library must be explicitly loaded by java code before it is referenced.
If your libtest.so is referenced by libwrapper.so, a call to LoadLibrary("wrapper") will
cause a reference to libtest.so, which will try to load it (unix in this case) by looking for it on
the LD_LIBRARY_PATH, where it won't find it.
To fix this call LoadLibrary("test") first, before LoadLibrary("wrapper").

Creating dll for JNI

hi,
anyone know how to create a dll in visual studio.net for JNI dynamic shared link library?

I think cl.exe is available even in Visual Studio .NET
So,
cl -Ic:\java\include -Ic:\java\include\win32
-LD HelloWorldImp.c -Fehello.dllshould work
$

Cannot create graph with more than 4000 rows or colume

need some help.
im trying to plot a graph using the report generation toolkit and i got this error and it say it cannot contain more than 4000 rows or columns
is it that there is a limit? if there is, how can i increase?
im trying to plot a graph using my data from excel which has over 10000 rows of data

I use this VI to read excel and to write a graph report.
in my excel, which i have attached, there's all data with about 11000 row.
i want to use it to plot a graph and i kinda stuck at here where there is this limit of 4000 row? and i can't seem to get the header i have link in the block diagram to the graph either.
Attachments:
excel.xls ‏837 KB
Read_excel_G_word_report.vi ‏34 KB

Cannot create dll with JNI

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