matlabcontrol fails to start MATLAB when executed from jar-file - java

I am using matlabcontrol to start matlab-sessions and everything works fine if i start it from eclipse. A new Matlab-session is opened or, if one is already open&connected, the old one is reactivated.
However, I want to do this via a windows command line that is called from a python program.
If I compile and export this to a .jar-file, it still works, but ONLY if an old, manually started MATLAB session is still open.
my current cmd-command is simply:
java -jar StartmatlabSim.jar
If no session is open, i get the following error in the cmd:
C:\Users\rEngel\Desktop>java -jar StartmatlabSim.jar
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: matlabcontrol.MatlabConnectionException: Support code location could not be determined. Could not ge
t path from URI location.
URI Location: jar:rsrc:matlabcontrol-4.1.0.jar!/
URL Location: jar:rsrc:matlabcontrol-4.1.0.jar!/
Code Source: (jar:rsrc:matlabcontrol-4.1.0.jar!/ <no signer certificates>)
Protection Domain: ProtectionDomain (jar:rsrc:matlabcontrol-4.1.0.jar!/ <no signer certificates>)
java.net.URLClassLoader#677327b6
<no principals>
java.security.Permissions#27973e9b (
("java.security.AllPermission" "<all permissions>" "<all actions>")
)
Class Loader: java.net.URLClassLoader#677327b6
Class Loader Class: class java.net.URLClassLoader
at matlabcontrol.Configuration.getSupportCodeLocation(Configuration.java:295)
at matlabcontrol.RemoteMatlabProxyFactory.createProcess(RemoteMatlabProxyFactory.java:289)
at matlabcontrol.RemoteMatlabProxyFactory.requestProxy(RemoteMatlabProxyFactory.java:125)
at matlabcontrol.RemoteMatlabProxyFactory.getProxy(RemoteMatlabProxyFactory.java:144)
at matlabcontrol.MatlabProxyFactory.getProxy(MatlabProxyFactory.java:81)
at StartMatlab.main(StartMatlab.java:14)
... 5 more
EDIT: For some reason, the system seems to treat a manually started session different from a commandline-started session. Strangely, a batch file with only that single command line also works, but not if it is called from python - it must be clicked on or executed from cmd (!?!?!?).
I am totally lost here....
Beeing able to run and launch my MATLAB-sessions is important for me, because I need to include it into a python-program (mosaik), which uses a cmd-command to start java.
If anybody recognizes the issue and knows a fix I would be very grateful.
Thank you&regards,
Robin
P.S.:
The Java-code is:
import matlabcontrol.*;
public class StartMatlab {
public static void main(String[] args)
throws MatlabConnectionException, MatlabInvocationException
{
// create proxy
MatlabProxyFactoryOptions options = new MatlabProxyFactoryOptions.Builder()
.setUsePreviouslyControlledSession(true).setHidden(true)
.build();
MatlabProxyFactory factory = new MatlabProxyFactory(options);
MatlabProxy proxy = factory.getProxy();
// call builtin function
proxy.eval("disp('hello world')");
// close connection
proxy.disconnect();
}
}
Also, I included matlabcontrol-4.1.0.jar to the .jar build path and chose to package the library into the jar file during export.

Related

java: Error initializing PCKS11 provider getting IOException C_GetFunctionList == NULL

I'm trying to write a Java application for digitally signing documents using a bit4Id miniLector token.
I'm in a Linux development environment.
The token is correctly installed, I can sign my documents also with the app downloaded from the manufacturer, but I have to write a new one for other purposes. The driver used is located at
/usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so
I'm stuck with this error:
/usr/lib/jvm/jdk1.8.0_111/bin/java ...
Exception in thread "main" java.security.ProviderException: Initialization failed
at sun.security.pkcs11.SunPKCS11.<init>(SunPKCS11.java:376)
at sun.security.pkcs11.SunPKCS11.<init>(SunPKCS11.java:103)
at com.itextpdf.samples.signatures.chapter02.C2_01_SignHelloWorld.main
(C2_01_SignHelloWorld.java:83)
Caused by: java.io.IOException: ERROR: C_GetFunctionList == NULL
at sun.security.pkcs11.wrapper.PKCS11.connect(Native Method)
at sun.security.pkcs11.wrapper.PKCS11.<init>(PKCS11.java:138)
at sun.security.pkcs11.wrapper.PKCS11.getInstance(PKCS11.java:151)
at sun.security.pkcs11.SunPKCS11.<init>(SunPKCS11.java:313)
... 2 more
The provider is listed in $JAVA_HOME/jre/lib/security/java.security file as:
security.provider.10=sun.security.pkcs11.SunPKCS11
The code behaving this way is this:
String configFile = "/opt/bar/cfg/pkcs11.cfg";
Provider provider = new sun.security.pkcs11.SunPKCS11(configFile); <-- line 83
The needed libraries are all imported by my IDE and I have no compile/link errors.
I didn't find this exact type of error in hours of googling.
If you need any further information let me know, any kind help is very appreciated, thanks.
For visual clarity I add all missing information with respect to the original question here below
Updates
Content of the pkcs11.cfg file:
$ cat /opt/bar/cfg/pkcs11.cfg
name="bit4id miniLector-EVO"
library=/usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so

Ok, I got it.
The problem is the driver.
Replacing
/usr/lib/x86_64-linux-gnu/engines-1.1/pkcs11.so
with
/opt/Firma4NG/System/Firma4NG_Linux/Firma4/drivers/mu-x64/libbit4xpki.so
that is one of the manufacturer's driver, now I can go further and, for example, dumping all info about the card:
Information for provider SunPKCS11-bit4id miniLector-EVO
Library info:
cryptokiVersion: 2.20
manufacturerID: bit4id srl
flags: 0
libraryDescription: bit4id PKCS#11
libraryVersion: 1.02
...
This question can be closed.

What causes elusive: NoSuchMethodError: org.jboss.remoting3.Remoting.createEndpoint()?

Many people have asked for help with this error:
javax.naming.NamingException: Failed to create remoting connection [Root exception is java.lang.NoSuchMethodError: org.jboss.remoting3.Remoting.createEndpoint(Ljava/lang/String;Lorg/xnio/OptionMap;)Lorg/jboss/remoting3/Endpoint;]
at
org.jboss.naming.remote.client.ClientUtil.namingException(ClientUtil.java:51)
at
org.jboss.naming.remote.client.InitialContextFactory.getInitialContext(InitialContextFactory.java:152)
at
javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
...
But no request I can find ever provides a conclusive answer. Just suggestions to tinker with jars.
I believe that’s because there’s an inconsistency in the structure of Jboss interfaces. Can anyone confirm or correct that?
Here’s my code that throws the above error:
final private Properties env = new Properties() {
{put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
put(Context.PROVIDER_URL, "http-remoting://localhost:9990");
put(Context.SECURITY_PRINCIPAL, "myID");
put(Context.SECURITY_CREDENTIALS, "myPassword");
put("jboss.naming.client.ejb.context", true);
}
};
/****************************************************
* myID & myPassword open the Admin GUI for wildfly *
* on localhost:9990 *
****************************************************/
Context ctx = new InitialContext(this.env);
To determine the required jars I removed all jars from the Build path.
Then I ran my program till all ClassNotFoundException were gone.
First Error
java.lang.ClassNotFoundException:
org.jboss.naming.remote.client.InitialContextFactory]
Added jboss-remote-naming-1.0.7.final.jar to class path
Second Error
java.lang.NoClassDefFoundError:
org/jboss/logging/Logger
Added jboss-logging.jar
Third Error
java.lang.NoClassDefFoundError:
org/xnio/Options
Added xnio-api-3.0.7.ga.jar
Fourth Error
java.lang.NoClassDefFoundError:
org/jboss/remoting3/spi/ConnectionProviderFactory
Added jboss-remoting-3.jar
Fifth Error
java.lang.NoClassDefFoundError:
org/jboss/ejb/client/EJBClientContextIdentifier
Added jboss-ejb-client-1.0.19.final.jar
FINAL AND FATAL ERROR
(Note: All NoClassDefFoundError have been cleared)
java.lang.NoSuchMethodError: org.jboss.remoting3.Remoting.createEndpoint(Ljava/lang/String;Lorg/xnio/OptionMap;)Lorg/jboss/remoting3/Endpoint;]
Using Eclipse’s Project Explorer I verified:
a. jboss-remoting3.jar has the org.jboss.remoting3.Remoting Class.
b. That Remoting Class has this Method:
public Endpoint createEndpoint (String, Executor, OptionMap)
Note it calls for 3 parameters.
BUT the FINAL FATAL ERROR above calls for
public Endpoint createEndpoint (String, OptionMap)
Note: it calls for 2 parameters. Hence the NoSuchMethodError.
Looking at the top lines in the stack trace, I guess
org.jboss.naming.remote.client.InitialContextFactory.getInitialContext() is trying to call org.jboss.remoting3.Remoting.createEndpoint() using 2 parameters, but org.jboss.remoting3.Remoting only defines createEndpoint() with a 3-paramater signature.
Is that supposed to even be possible?
A jar that says it has the org.jboss.remoting3 package whose Remoting class has a single createEndpoint() method with a 3-parameter signature, and another jar that says it has the org.jboss.remoting3 package whose Remoting class has another createEndpoint() method with a 2-parameter signature?
HELP!
I mean do I need to look through every org.jboss.remoting3 package to find one whose Remoting class has a 2 parameter createEnpoint() method?
Or am I missing something important.
I mean this does explain how many questions have been posted about this error:
javax.naming.NamingException: Failed to create remoting connection [Root exception is java.lang.NoSuchMethodError: org.jboss.remoting3.Remoting.createEndpoint(Ljava/lang/String;Lorg/xnio/OptionMap;)Lorg/jboss/remoting3/Endpoint;]
And explain why there is never a conclusive explanation or solution other than fiddling with jars and build path.
I mean getting an InitialContext from WildFly running on the same PC as the Java program should be a trivial process. But it hasn’t been. Maybe it's because of inconsistencies in the API.

Thanks to Christoph Böhme:
jboss-logging-3.1.4.GA.jar has an org.jboss.remeoting package with a Remoting class that has createEndpoint() with a 0, 2 and 3 parameter signature.
Replacing jboss-remoting-4.0.7.Final.jar with the above jar was all it required to clear the NoSuchMethodError.
Hope that helps others.

ServletUnit RequestDispatcher forward() / include() methods AbstractMethodError

I'm doing a java web app with a servlet and I wanted to write some tests to check its functionality (ex. authorization form). I hadn't been using any framework, just bare java in eclipse with tomcat 7.0
I've run into an error while trying to test authorization input. The app would check the login-password pair and then redirect using RequestDispatcher.forward() or RequestDispatcher.include() methods. But when executing them it throws an error with the following stack trace:
java.lang.reflect.Inv­ocationTargetExceptio­n
at su­n.reflect.NativeMetho­dAccessorImpl.invoke0­(Native Method)
at su­n.reflect.NativeMetho­dAccessorImpl.invoke(­Unknown Source)
at su­n.reflect.DelegatingM­ethodAccessorImpl.inv­oke(Unknown Source)
at ja­va.lang.reflect.Metho­d.invoke(Unknown Sour­ce)
at en­tryPoint.Dispatcher.d­ispatch(Dispatcher.ja­va:166)
at en­tryPoint.Dispatcher.s­ervice(Dispatcher.jav­a:49)
at ja­vax.servlet.http.Http­Servlet.service(HttpS­ervlet.java:728)
at co­m.meterware.servletun­it.InvocationContextI­mpl.service(Invocatio­nContextImpl.java:76)
at co­m.meterware.servletun­it.ServletUnitClient.­newResponse(ServletUn­itClient.java:126)
at co­m.meterware.httpunit.­WebClient.createRespo­nse(WebClient.java:64­7)
at co­m.meterware.httpunit.­WebWindow.getResource­(WebWindow.java:220)
at co­m.meterware.httpunit.­WebWindow.getSubframe­Response(WebWindow.ja­va:181)
at co­m.meterware.httpunit.­WebWindow.getResponse­(WebWindow.java:158)
at co­m.meterware.httpunit.­WebWindow.updateWindo­w(WebWindow.java:199)
at co­m.meterware.httpunit.­WebWindow.getSubframe­Response(WebWindow.ja­va:183)
at co­m.meterware.httpunit.­WebWindow.getResponse­(WebWindow.java:158)
at co­m.meterware.httpunit.­WebClient.getResponse­(WebClient.java:122)
at te­st.Authorization.test­AuthCorrectInput_Wron­gPassword(Authorizati­on.java:102)
at su­n.reflect.NativeMetho­dAccessorImpl.invoke0­(Native Method)
at su­n.reflect.NativeMetho­dAccessorImpl.invoke(­Unknown Source)
at su­n.reflect.DelegatingM­ethodAccessorImpl.inv­oke(Unknown Source)
at ja­va.lang.reflect.Metho­d.invoke(Unknown Sour­ce)
at or­g.junit.runners.model­.FrameworkMethod$1.ru­nReflectiveCall(Frame­workMethod.java:45)
at or­g.junit.internal.runn­ers.model.ReflectiveC­allable.run(Reflectiv­eCallable.java:15)
at or­g.junit.runners.model­.FrameworkMethod.invo­keExplosively(Framewo­rkMethod.java:42)
at or­g.junit.internal.runn­ers.statements.Invoke­Method.evaluate(Invok­eMethod.java:20)
at or­g.junit.internal.runn­ers.statements.RunBef­ores.evaluate(RunBefo­res.java:28)
at or­g.junit.runners.Paren­tRunner.runLeaf(Paren­tRunner.java:263)
at or­g.junit.runners.Block­JUnit4ClassRunner.run­Child(BlockJUnit4Clas­sRunner.java:68)
at or­g.junit.runners.Block­JUnit4ClassRunner.run­Child(BlockJUnit4Clas­sRunner.java:47)
at or­g.junit.runners.Paren­tRunner$3.run(ParentR­unner.java:231)
at or­g.junit.runners.Paren­tRunner$1.schedule(Pa­rentRunner.java:60)
at or­g.junit.runners.Paren­tRunner.runChildren(P­arentRunner.java:229)
at or­g.junit.runners.Paren­tRunner.access$000(Pa­rentRunner.java:50)
at or­g.junit.runners.Paren­tRunner$2.evaluate(Pa­rentRunner.java:222)
at or­g.junit.internal.runn­ers.statements.RunBef­ores.evaluate(RunBefo­res.java:28)
at or­g.junit.internal.runn­ers.statements.RunAft­ers.evaluate(RunAfter­s.java:30)
at or­g.junit.runners.Paren­tRunner.run(ParentRun­ner.java:300)
at or­g.eclipse.jdt.interna­l.junit4.runner.JUnit­4TestReference.run(JU­nit4TestReference.jav­a:50)
at or­g.eclipse.jdt.interna­l.junit.runner.TestEx­ecution.run(TestExecu­tion.java:38)
at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.runTests(R­emoteTestRunner.java:­467)
at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.runTests(R­emoteTestRunner.java:­683)
at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.run(Remote­TestRunner.java:390)
at or­g.eclipse.jdt.interna­l.junit.runner.Remote­TestRunner.main(Remot­eTestRunner.java:197)
Caused by: javax.serv­let.ServletException:­ java.lang.AbstractMe­thodError: com.meterw­are.servletunit.Servl­etUnitServletContext.­getClassLoader()Ljava­/lang/ClassLoader;
at or­g.apache.jasper.servl­et.JspServlet.service­(JspServlet.java:343)
at ja­vax.servlet.http.Http­Servlet.service(HttpS­ervlet.java:728)
at co­m.meterware.servletun­it.RequestDispatcherI­mpl.forward(RequestDi­spatcherImpl.java:54)
at co­ntrollers.Auth.index(­Auth.java:78)
... 4­4 more
Caused by: java.lang.­AbstractMethodError: ­com.meterware.servlet­unit.ServletUnitServl­etContext.getClassLoa­der()Ljava/lang/Class­Loader;
at or­g.apache.jasper.compi­ler.TagPluginManager.­init(TagPluginManager­.java:72)
at or­g.apache.jasper.compi­ler.TagPluginManager.­apply(TagPluginManage­r.java:56)
at or­g.apache.jasper.compi­ler.Compiler.generate­Java(Compiler.java:24­0)
at or­g.apache.jasper.compi­ler.Compiler.compile(­Compiler.java:373)
at or­g.apache.jasper.compi­ler.Compiler.compile(­Compiler.java:353)
at or­g.apache.jasper.compi­ler.Compiler.compile(­Compiler.java:340)
at or­g.apache.jasper.JspCo­mpilationContext.comp­ile(JspCompilationCon­text.java:646)
at or­g.apache.jasper.servl­et.JspServletWrapper.­service(JspServletWra­pper.java:357) ­
at or­g.apache.jasper.servl­et.JspServlet.service­JspFile(JspServlet.ja­va:390)
at or­g.apache.jasper.servl­et.JspServlet.service­(JspServlet.java:334)
... 4­7 more
The first block represents an invocation error caught by central controller (Dispatcher) servlet while invoking method in which an AbstractMethodError had been thrown. The second and third ones are about that error.
The code of the test method is as follows:
#Test
publi­c void testAuthIncorr­ectInput_Long() throw­s Exception {
W­ebRequest request = n­ew PostMethodWebReque­st("http://localhost:­8080/CenralReportDL/D­ispatcher?query=auth"­);
S­tring longString = ne­w String();
f­or (int i = 0; i < 52­; i++) {
­ longString­ += "aA_ba";
}
reque­st.setParameter("user­name", longString);
reque­st.setParameter("pass­word", longString);
W­ebResponse response =­ client.getResponse(r­equest);
a­ssertNotNull("No resp­onse received", respo­nse);
}
How can I get rid of this error? Is there a workaround? Should I maybe use some other means of servlet testing?
Also please do not suggest framework-specific testing utils such as strutstest, I want an actual solution for bare java web application.
UPDATE: In response to #JekinKalariya - I had a JasperException before. It complained about files not being in /WEB-INF folder, but due to my project structure they all were in /WebContent/WEB-INF. I was so frustrated because of that I just copied entire folder. Silly thing to do. I deleted it and now I'm back to that JasperException.
UPDATE: Now, I've done some research and found some answers on this issue. Didn't work for me though. I also found a suggestion to change a target runtime to J2EE Preview, which raised a different kind of exception:
com.meterware.httpuni­t.HttpNotFoundExcepti­on: Error on HTTP req­uest: 404 java.lang.C­lassNotFoundException­: org.apache.jasper.s­ervlet.JspServlet [http://localhost/WEB-­INF/jsp/auth.jsp]

Sending a serialized Android object using sockets throws an InvalidClassException

I'm trying to make an online drawing game. For that I'm using the Path class in Android and I need to send it to my Java server. To do that, I had tried to extend the Path class, as follows:
public class SerializedPath extends Path implements Serializable {
private static final long serialVersionUID = -5974912367682897467L;
}
To simplify things and to narrow down the problem, all I did was to send it with outputStream.writeObject(new SerializedPath) and then outputStream.flush() where outputStream is an instance of ObjectOutputStream. Over the server I simply read it using inputStream.readObject() where inputStream is an instance of ObjectInputStream. The exception I'm getting is:
java.io.InvalidClassException: com.droplay.drawingonline.path.SerializedPath; unable to create instance
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
at com.droplay.drawingonline.Session.run(Session.java:71)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedSerializationConstructorAccessor1.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.io.ObjectStreamClass.newInstance(Unknown Source)
... 5 more
Caused by: java.lang.RuntimeException: Stub!
at android.graphics.Path.(Path.java:24)
... 8 more
Now, to isolate the problem, I had tried creating a new class that doesn't have any members and doesn't extend anything and it did work. The server didn't throw any exception and it worked like a charm. I made sure the packages names are the same, the names of the classes are the same, the server uses the same SDK files as my Android project and the files' code in both the Android app and the Java server are EXACTLY the same, but I keep getting this exception. The app doesn't throw any exception. It sends the object just fine. Please, what's wrong with my code? Thank you for helping! :)

Well I managed to solve it by sending the position of each click to the server, instead of a path class. But why didn't it work when I serialized it?

Lotus Notes Agent - Java Security Error

I have a Lotus Notes Agent written in Java which should pop up a message to the user after it is executed by clicking a button in the Notes client. Trying to display the pop-up causes an error which I see in the Java Debug console as :
java.security.AccessControlException: Access denied (java.lang.RuntimePermission exitVM.0)
at java.security.AccessController.checkPermission(AccessController.java:108)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:544)
at COM.ibm.JEmpower.applet.AppletSecurity.superDotCheckPermission(AppletSecurity.java:1449)
at COM.ibm.JEmpower.applet.AppletSecurity.checkRuntimePermission(AppletSecurity.java:1311)
at COM.ibm.JEmpower.applet.AppletSecurity.checkPermission(AppletSecurity.java:1611)
at COM.ibm.JEmpower.applet.AppletSecurity.checkPermission(AppletSecurity.java:1464)
at java.lang.SecurityManager.checkExit(SecurityManager.java:756)
at java.lang.Runtime.exit(Runtime.java:99)
at java.lang.System.exit(System.java:279)
at ClipboardTest.main(Unknown Source)
at JavaAgent.NotesMain(Unknown Source)
at lotus.domino.AgentBase.runNotes(Unknown Source)
at lotus.domino.NotesThread.run(Unknown Source)
My agent code is
import lotus.domino.*;
import javax.swing.JOptionPane;
public class JavaAgent extends AgentBase {
public void NotesMain() {
try {
Session session = getSession();
AgentContext agentContext = session.getAgentContext();
// (Your code goes here)
Document cdoc = agentContext.getDocumentContext();
String[] notesURL = new String[] {cdoc.getNotesURL()};
ClipboardTest.main(notesURL);
JOptionPane.showMessageDialog(null,"message","title",JOptionPane.WARNING_MESSAGE);
} catch(Exception e) {
e.printStackTrace();
}
}
}
I have manager access to the Database. What could be causing this error?

First look at what the error actually is:
Access denied (java.lang.RuntimePermission exitVM.0)
You are telling the VM to die and you do not have the rights to do this. If you had, you would cause anything else running on that JVM instance to die as well, possibly leading to a hang/crash.
Secondly your code is failing in the ClipboardTest.main() method, which you haven't posted any code for.
In the agent properties there is an option to add debug data. This will give you the exact line number that is causing the issue.
My guess is you have a System.exit() call in the ClipboardTest.main() . It shouldn't be there.

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