java.lang.NoClassDefFoundError: net.sf.jni4net.Bridge

[Mr E]

Hi,  Thanks for the jni4net bridge!  I have successfully built a Java application that calls a C# dll -- I have got the code working in Eclipse when run as a Java application.

What I would like to do now is call this method as part of a Lotus Notes plugin.

This java class sets up the Bridge and loads and registers the assembly DLL.  If the arguments passed (username and password) are validated by the C# dll, then 

public class Jni4netAuthenticator {

    /**

    * @param args

    * @throws IOException

    */

    public static void main(String[] args) throws IOException {

        System.out.println("classpath="+System.getProperty("java.classpath"));

        Bridge.setVerbose(true);

        Bridge.init();

        File proxyAssemblyFile = new File("SharpAuthenticator.j4n.dll");

        Bridge.LoadAndRegisterAssemblyFrom(proxyAssemblyFile);

        sharpauthenticator.Authenticator auth = new sharpauthenticator.Authenticator();

        boolean result = auth.Authenticate(args[0], args[1]);

        if (!result) {

            System.err.println("Not valid.");

        } else {

            System.out.println("Valid!");

        }

    }

}

When I run this as a Java application, using "user pass" as arguments, I get this in the console:

classpath=null

core loaded from C:/Users/Eric/workspace/jni4net/com.my.widget/jni4net.n-0.8.6.0.dll

clr.version         :v4.0.30319

clr.arch            :32bit

java.home           :C:\Lotus\Notes6\jvm

java.version        :1.6.0

sun.arch.data.model :32

loading SharpAuthenticator.j4n, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null from C:\Users\Eric\workspace\jni4net\com.my.widget\SharpAuthenticator.j4n.dll

loaded SharpAuthenticator.j4n, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null from C:\Users\Eric\workspace\jni4net\com.my.widget\SharpAuthenticator.j4n.dll

Valid!

So all compiles and runs correctly.  Now I would like to call the DLL from within the Notes plugin.  I am getting an error 

java.lang.NoClassDefFoundError: net.sf.jni4net.Bridge

when I call Jni4netAuthenticator from another method that is invoked from a menu command:

public class Command1Handler extends AbstractHandler {

public Object execute(ExecutionEvent event) throws ExecutionException {

String[] up = {"user","pass"};

try {

Jni4netAuthenticator.main(up);

} catch (IOException e) {

System.err.println("Bridge IOException.");

e.printStackTrace();

}

        }

}

It seems to be unable to find the jar file jni4net.j-0.8.6.0.jar.  It may have something to do with static methods.  I do not know.  

Here is the console log when the Lotus Notes menu item is selected:

Platform: 'Generic Web Application Server'

classpath=null

2014/09/03 00:58:00.440 SEVERE CLPDN0031E: Event loop exception ::class.method=com.ibm.rcp.personality.framework.internal.RCPWorkbenchAdvisor.eventLoopException() ::thread=main ::loggername=com.ibm.rcp.personality.framework.internal

java.lang.NoClassDefFoundError: net.sf.jni4net.Bridge

at com.my.widget.Jni4netAuthenticator.main(Jni4netAuthenticator.java:17)

at com.my.widget.Command1Handler.execute(Command1Handler.java:48)

at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:281)

at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)

at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)

at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)

at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:247)

at org.eclipse.ui.menus.CommandContributionItem.handleWidgetSelection(CommandContributionItem.java:619)

at org.eclipse.ui.menus.CommandContributionItem.access$10(CommandContributionItem.java:605)

at org.eclipse.ui.menus.CommandContributionItem$4.handleEvent(CommandContributionItem.java:595)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4166)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3755)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2384)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2348)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2200)

at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:495)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:490)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)

at com.ibm.rcp.personality.framework.internal.RCPApplication.run(RCPApplication.java:67)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)

at java.lang.reflect.Method.invoke(Method.java:611)

at org.eclipse.equinox.internal.app.EclipseAppContainer.callMethodWithException(EclipseAppContainer.java:574)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:195)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:386)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:60)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)

at java.lang.reflect.Method.invoke(Method.java:611)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:549)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:504)

at org.eclipse.equinox.launcher.Main.run(Main.java:1236)

at org.eclipse.equinox.launcher.Main.main(Main.java:1212)

Caused by: java.lang.ClassNotFoundException: net.sf.jni4net.Bridge

at org.eclipse.osgi.framework.internal.core.BundleLoader.findClassInternal(BundleLoader.java:483)

at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:399)

at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:387)

at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:87)

at java.lang.ClassLoader.loadClass(ClassLoader.java:638)

... 40 more

Anyone know how to configure this correctly?  ;-)

Thanks in advance!

-Eric

[Pavel Šavara]

Two hints to check
- dlls in current directory of the process
- classloader and classpath

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[Mr E]

Thanks, Pavel,

By 'current directory' do you mean C:/Users/Eric/workspace/jni4net/com.my.widget/ where the SharpAuthenticator.j4n.jar is stored (and included as a reference library in the build path) 

or do you mean by 'current directory' C:\program files\lotus\notes\jvm\bin where the java.exe is?

In C:/Users/Eric/workspace/jni4net/com.my.widget/ I have stored the jni jar and dll files -- do these need to reside somewhere else, too?  I have added jni4net.j-0.8.6.0.jar to the referenced libraries in the build path. 

I am using Eclipse and do not quite know where/how to check/set the classpath.  When the code runs, 

System.out.println("classpath="+System.getProperty("java.classpath"));

it just returns "null".  

Here is the manifest file:

Manifest-Version: 1.0

Require-Bundle: org.eclipse.ui,

 org.eclipse.core.runtime,

 com.ibm.notes.java.ui,

 com.ibm.rcp.ui,

 com.ibm.lotuslabs.context.service,

 org.eclipse.core.expressions

Bundle-Vendor: VendorName

Bundle-ActivationPolicy: lazy

Bundle-Version: 1.0.0

Bundle-Name: Widget Plug-in

Bundle-Activator: com.my.widget.Activator

Bundle-ManifestVersion: 2

Bundle-SymbolicName: com.my.widget;singleton:=true

Bundle-RequiredExecutionEnvironment: JavaSE-1.6

Import-Package: org.eclipse.ui.forms,

 org.eclipse.ui.forms.widgets

Thanks again!

-E

[Pavel Šavara]

Sorry, i'm too busy to go deeper on this one.