Native library & JAR

Is it possible to add native library into JAR?
Archive: JarTest.jar
META-INF/
META-INF/MANIFEST.MF
test/
test/Hello.class
test/Native.class
libtestnative.so
MANIFEST.MF
Manifest-Version: 1.0
Ant-Version: Apache Ant 1.6.5
Created-By: 1.5.0_06-b05 (Sun Microsystems Inc.)
Main-Class: test.Native
Bundle-NativeCode: /libtestnative.so; osname=Linux,       processor=i386This command works perfectly:
java -Djava.library.path=./lib_native -cp bin test.Native
but if I use JAR:
$ java -cp JarTest.jar test.Native
Exception in thread "main" java.lang.UnsatisfiedLinkError: no testnative in java.library.path
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1682)
        at java.lang.Runtime.loadLibrary0(Runtime.java:822)
        at java.lang.System.loadLibrary(System.java:992)
        at test.Native.<clinit>(Native.java:13)
I have also tryied:
java -Djava.library.path=./jar/JarTest.jar -cp ./jar/JarTest.jar test.Native
java -Djava.library.path=./ -cp ./jar/JarTest.jar test.Native
With the same result.
Any help would be realy appreciated.

One way would be to create a helper class that:
1- Verifies that the native library is already located in a specific folder (could be the one specified by the user.home system property).
If so then go to step -3-.
2- Extracts the native library from the jar (with the Class.getResourceAsStream() method for instance) to the specific folder.
3- Loads the native library with the System.load() method which requires a complete path name.
Regards

Similar Messages

NOT WORKING: Putting a jar file requiring native library in bootclasspath

Hi,
I put my own jar file into the bootclasspath like this:
java -Xbootclasspath/p:myboot.jar TestClass
Some classes in the jar require a native library. For JVM 1.3 on Solaris, I put the native library in $JAVA_HOME/jre/lib/sparc and everything works just fine.
However, when I try the same thing on JVM1.4, I got the following error when my class containing the native methods is called:
Failed to load the native library: myboot_native
java.lang.UnsatisfiedLinkError: no myboot_native in java.library.path
I tried to put that native library in several different directories in jre/lib but still had no luck.
Is there anybody know the solution? Does JVM1.4 allow me to put a custom jar file that requires a native library in the bootclasspath?
Regards,
Eman

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hello all
i cann't find out (or don't understand) the way what i need. i mean how can i copy the dll file(s) in the windows system diractory? i can put the dll in the jar file then how can i copy that dll after extract?
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<!DOCTYPE web-app
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Problem : Native Library already loaded in another classloader

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////////////////////////////////////my native function class, a singleton class////////////////////////////////
package haspkey.api;
import java.util.Collection;
import java.util.Vector;
import haspkey.HardwareSecurityKey;
Public class HaspKeyAPI {
Public static final int KEYEXIST = 1;
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private HaspKeyAPI()
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public Object clone()
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byte[] block, int password1, int password2);
public native void writeBlock(int startMemoryLocation,int size, byte[] block, int password1,
int password2);
public native boolean decodeData(int size, byte[] block, int password1,
int password2);
public native boolean encodeData(int size, byte[] block, int password1,
int password2);
static {
System.loadLibrary("HaspKeyAPI");
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import com.bowebellhowell.haspkey.api.HaspKeyAPI;
import com.bowebellhowell.winsort.vo.haspkey.HardwareSecurityKey;
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public static final int p2 = 0;
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at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1551)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1511)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:834)
at haspkey.api.HaspKeyAPI.<clinit>(HaspKeyAPI.java:76)
at util.HaspKey.isKeyPresent(HaspKey.java:35)
at LogonAction (LogonAction .java:65)

Hi EveryBody:
i working in 2 servlets, these servlets import a login.jar library and login.jar call to Login.dll (a native Library)
then. when i start second servlet i have this message
java.lang.UnsatisfiedLinkError: Native Library dllLogin.dll already loaded in another classloader
i read about class loader and i know about a only one load for native library but i don't know how resolve this exception because both servlets need dllLogin.dll to validate the user
please anybody knows how or have any idea?
Kind Regards
Edson
--sorry i know. my english is very bad

Native library loading problem

Hi Folks,
I currently downloaded, and compiled the bDB core using VS 2010 x64 (I run 64 bit win7, and JRE 64 bit). In Eclipse I'm trying to use the native library (setting up the path correctly), however the java is complaining that it cannot find dependencies.
I switched to JE, it works fine, but I'm not sure if JE is as performant as the core version. Anybody had the same problem?
thanks in advance
Edited by: user5493457 on Mar 22, 2011 3:35 AM

Hi,
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Regards,
Andrei

[XMLType]Native Library already loaded

Hi !
I work with oracle DB 9.2.0.3 and J2ee server.
I connect to the db with JDBC driver (oci8 client)
When I use the method CreateXML method (XDB.jar package) I have this error :
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I have to shutdown and reopen my J2ee server ...
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If you use the session of the myserver1, then store some value in session to identify that the library is loaded.
As a first step in myserver2, Check in session whether the value is set.
If you cannot propagate session information across myserver1 and myserver2, then
myserver1:
static
loadLibrary("YourDLL")
"Include this here..........."
This code will be there in some class
"Include this here..........."
Just write in ser file that DLL is loaded.
myserver2:
static
checkWhetherAlreadyLoaded();
loadLibrary("YourDLL");
Or have the loading of library alone in a class in a static method.
public class LoadClass
public static loadLibrary()
System.loadLibrary("YourDLL");
In myserver1, just call this.
In myserver2, before calling this method,
just call any native method - a test method will do
public boolean checkLoadedStatus()
try
// Call the testing nativemethod.
catch(UnsatisfiedLinkerError e)
try
LoadClass.loadLibrary();
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My application is :
1. packed into 1 jar file
2. use sqljdbc4.jar
2. use a native library: "Microsoft SQL Server JDBC Driver 3.0".(use it in Ecplise and it works fine)
3. run by this command: "java -jar myapp.jar".
java version is jdk1.6.0_23
btw: I config all the class paths in the manifest.mf file
My application is failed to run, since it cannot find the native library. How/where to specify the native library location?

-Djava.library.path

Deploy project using Jdeveloper with native library (dll)

hi
i need to deploy project using Jdeveloper but the generated jar dose not include native library dll file .

it is ok now
using deployment in properties of project and add new file group of type dependency analysis

Will WLS start 32-bit or 64-bit native library?

After installing the generic WLS 10.3.4 on HP Itanium platform (64bit), I got both 32-bit and 64-bit native libraries. At runtime, which native library will be used? Is WLS smart enough to pick the right one depending on the JVM I am using? Is it that if I have 32-bit JVM then WLS will pick 32-bit native library at runtime?
Edited by: user702439 on Feb 7, 2011 7:56 PM

Hi,
If you are using 64 bit operating system then you must consider following things to make sure that the corre ct 64-bit libraries gets loaded by WLS:
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*2).* While using Generic Jar installer Make Sure that you already has 64-Bit JDK installed in your Box where you want to install WLS.
*3).* In LINUX Compatible JDKs you will find a JAVA_OPTION "-d64" which can be used to instruct JDK to run in 64 bit mode while Installing the WLS using generic Jar like following:
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Publish a native library

I am trying to load a native library to be used among many applications in a wls, but I am getting UnsatisfiedLinkError if loaded the library by one application and try to use it by another.
Please if anyone knows how to get this implementation working, I really appreciate it!!

hello all
i cann't find out (or don't understand) the way what i need. i mean how can i copy the dll file(s) in the windows system diractory? i can put the dll in the jar file then how can i copy that dll after extract?
"daney" said that he have done it.
This certianly is possible. I have done it.
You have to extract the dll from the jar file and write it to a temporary >file in the file system. Then call System.load() on the file you just >extracted.
Do you want to delete the temporary file when you are done with it? >That is a bit more difficult, but it is possible if you use a ClassLoader >to run your code containing native methods.anybody have any idea how he has done? please give some details if anyone have worked on it before.i am waiting for the solutions.
thanks
bashar

Web Start does not extract native library

Hi there,
we�ve been deploying our application through web start for about a year, yet. And we are in the "lucky" situation, that all customers are running windows and indentical JREs.
A few weeks ago we switched from 1.4.2_08 to 1.5.0_03. Our customers (pre-)install our application by using the -import option of web start, which downloads fine. But recently, we receive more and more error reports, that a call to a native library fails, when the application is first run.
Thus we inspected the users' web start cache and found out, that though the jar containing our native lib was downloaded into the cache, but the contained dll is not extracted.
The extracted dll usually resides in a directory RM*.jar in the cache. And of course, as it isn't there, the call to the library fails.
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To try to reproduce the original problem, remove the deployment.properties file from the <application data>\Sun\Java|Deployment directory, then run 1.4.2 with you app. The upgrade to 1.5.0.
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Problems with loading native library/missing methods:no ttJdbcCS in java.li

Iam facing one problem while connecting the timesten client to the server The SQL Exception which Iam getting is pasted below:-
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I am working with MAC OS X 10.7.2 and my timesten client version is 11.2.1.0
I have also changed the Java Preferences from 64-bit to 32-bit but still whenever i tried to connect with the SQL Developer it gives me the above error.

I just tried this out. My environment is OS X 10.7.4, Timesten (32-bit) client 11.2.1.9.0, SQL Developer 3.1.07, Oracle Java 1.7.0_04.
The key things you need to be sure to do (in a terminal window) are:
1. Be sure to . in the TimesTen environment script <tt_install_dir>/bin/ttenv.sh to set the full TT environment.
2. Change directory to SQLDeveloper.app/Contents/Resources/sqldeveloper
3. Run 'sh sqldeveloper.sh -J-d32'
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Chris

Executing native library under Java - shell script problem

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# Set the minimum and maximum heap sizes
MINIMUM_HEAP_SIZE=768m
MAXIMUM_HEAP_SIZE=1024m
if [ "$MYAPP_JAVA_HOME" = "" ] ; then
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fi
_JAVA_EXEC="java"
if [ "$MYAPP_JAVA_HOME" != "" ] ; then
    _TMP="$MYAPP_JAVA_HOME/bin/java"
    if [ -f "$_TMP" ] ; then
        if [ -x "$_TMP" ] ; then
            _JAVA_EXEC="$_TMP"
        else
            echo "Warning: $_TMP is not executable"
        fi
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        echo "Warning: $_TMP does not exist"
    fi
fi
if ! which "$_JAVA_EXEC" >/dev/null ; then
    echo "Error: No Java environment found"
    exit 1
fi
_MYAPP_CLASSPATH="MyGame.jar:log4j-1.2.16.jar:jme/jme-colladabinding.jar:jme-audio.jar:jme-awt.jar:jme-collada.jar:jme-editors.jar:jme-effects.jar:jme-font.jar:jme-gamestates.jar:jme-model.jar:jme-ogrexml.jar:jme-scene.jar:jme-swt.jar:jme-terrain.jar:jme.jar:jogl/gluegen-rt.jar:jogl/jogl.jar:jorbis/jorbis-0.0.17.jar:junit/junit-4.1.jar:lwjgl/jinput.jar:lwjgl/lwjgl.jar:lwjgl/lwjgl_util.jar:lwjgl/lwjgl_util_applet.jar:swt/windows/swt.jar:jbullet/jbullet-jme.jar:jbullet/asm-all-3.1.jar:jbullet/jbullet.jar:jbullet/stack-alloc.jar:jbullet/vecmath.jar:trove-2.1.0.jar:sceneMonitor/jmejtree_jme2.jar:sceneMonitor/propertytable.jar:sceneMonitor/scenemonitor_jme2.jar:sceneMonitor/sm_properties_jme2.jar"
_VM_PROPERTIES="-Djava.library.path=\'lwjgl/native/linux\'"
_MYAPP_MAIN_CLASS="com.mygame.Main"
$_JAVA_EXEC -classpath $_MYAPP_CLASSPATH $_VM_PROPERTIES -Xmx${MAXIMUM_HEAP_SIZE} -Xms${MINIMUM_HEAP_SIZE} -ea $_MYAPP_MAIN_CLASSThe shell script is in the same directory as the JAR files (the same directory where I ran the Java command above). When I execute the shell script ( sh MyGame.sh ), I get the UnsatisfiedLinkError message:
    14-Feb-2011 19:46:28 com.wcg.game.DefaultUncaughtExceptionHandler uncaughtException
    SEVERE: Main game loop broken by uncaught exception
    java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path
       at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1734)
       at java.lang.Runtime.loadLibrary0(Runtime.java:823)
       at java.lang.System.loadLibrary(System.java:1028)
       at org.lwjgl.Sys$1.run(Sys.java:73)
       at java.security.AccessController.doPrivileged(Native Method)
       at org.lwjgl.Sys.doLoadLibrary(Sys.java:66)
       at org.lwjgl.Sys.loadLibrary(Sys.java:82)
       at org.lwjgl.Sys.<clinit>(Sys.java:99)
       at org.lwjgl.opengl.Display.<clinit>(Display.java:130)
       at com.jme.system.lwjgl.LWJGLDisplaySystem.setTitle(LWJGLDisplaySystem.java:118)
       at com.wcg.game.WcgStandardGame.initSystem(WcgStandardGame.java:287)
       at com.wcg.game.WcgStandardGame.run(WcgStandardGame.java:185)
       at java.lang.Thread.run(Thread.java:662)I don't understand what I am doing wrong. I am executing the exact same command via a shell script and it is not working. Any ideas, solutions, most welcome.
I am running Linux Mint Debian 201012, Linux mint 2.6.32-5-amd64 #1 SMP Thu Nov 25 18:02:11 UTC 2010 x86_64 GNU/Linux. JDK is 1.6.0_22 64-bit. I have 64-bit .so files in the correct place too.
Thanks
Riz

Thanks for the replies guys/gals.
I have modified the script and echoed my command that should be running under the shell script, it is:
java -classpath WcgFramework.jar:WcgPocSwordplay.jar:log4j-1.2.16.jar:jme/jme-colladabinding.jar:jme-audio.jar:jme-awt.jar:jme-collada.jar:jme-editors.jar:jme-effects.jar:jme-font.jar:jme-gamestates.jar:jme-model.jar:jme-ogrexml.jar:jme-scene.jar:jme-swt.jar:jme-terrain.jar:jme.jar:jogl/gluegen-rt.jar:jogl/jogl.jar:jorbis/jorbis-0.0.17.jar:junit/junit-4.1.jar:lwjgl/jinput.jar:lwjgl/lwjgl.jar:lwjgl/lwjgl_util.jar:lwjgl/lwjgl_util_applet.jar:swt/windows/swt.jar:jbullet/jbullet-jme.jar:jbullet/asm-all-3.1.jar:jbullet/jbullet.jar:jbullet/stack-alloc.jar:jbullet/vecmath.jar:trove-2.1.0.jar:sceneMonitor/jmejtree_jme2.jar:sceneMonitor/propertytable.jar:sceneMonitor/scenemonitor_jme2.jar:sceneMonitor/sm_properties_jme2.jar -Djava.library.path="lwjgl/native/linux" -Xmx1024m -Xms768m -ea com.mygame.MainI am more confident that now the shell script should be fine (I am a shell script noob) because this very command if I copy from terminal and paste into the terminal, runs the application no problem at all. But I am amazed that it is still not working. I must be doing something obviously wrong. :-(
I used the code as suggested:
_VM_PROPERTIES='-Djava.library.path="lwjgl/native/linux"'I am stumped!? :-(
Thanks for help.

Can I create more than one instance of a native library?

Hello all,
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Does anyone know if there is any way to load more than one "instance" of a native library?
The use of System.loadLibrary() would indicate not, and my (limited) knowledge of the Windows environment would tell me that a "shared" library only has on instance. (confirm anyone?)
I need to find a way around this bottle-neck issue... (and "no", before anyone suggests it, I can't ditch Windows!)
Thanks.

I am not sure about the behaviour of the dll as it's not mine. It's a COM DLL which I have "wrapped" in a standard windows DLL so I can expose the JNI methods. I assume because it's COM that it IS reentrant, but I am a bit of a novice when it comes to Windows and COM. I didn't install the COMponent either, it was installed as part of another application. (It's an antivirus COM dll that is part of an AV application)
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Native library & JAR

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