Develop Reference

FactoryConfigurationError thrown when trying to load jar from ByteArray with custom ClassLoader

I want to dynamically load JAR Files using a ClassLoader from a ByteArray. It works fine with every executable JAR Files I've tried it with so far, except a Program using WebLaF. I always get the following set of Errors:
javax.xml.parsers.FactoryConfigurationError: Provider for class javax.xml.parsers.DocumentBuilderFactory cannot be created
at javax.xml.parsers.FactoryFinder.findServiceProvider(Unknown Source)
at javax.xml.parsers.FactoryFinder.find(Unknown Source)
at javax.xml.parsers.DocumentBuilderFactory.newInstance(Unknown Source)
at com.thoughtworks.xstream.io.xml.DomDriver.<init>(DomDriver.java:64)
at com.thoughtworks.xstream.io.xml.DomDriver.<init>(DomDriver.java:56)
at com.thoughtworks.xstream.io.xml.DomDriver.<init>(DomDriver.java:48)
at com.alee.utils.XmlUtils.initializeXStream(XmlUtils.java:90)
at com.alee.utils.XmlUtils.getXStream(XmlUtils.java:77)
at com.alee.utils.XmlUtils.processAnnotations(XmlUtils.java:141)
at com.alee.laf.WebLookAndFeel$2.propertyChange(WebLookAndFeel.java:855)
at java.beans.PropertyChangeSupport.fire(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at javax.swing.UIManager.setLookAndFeel(Unknown Source)
at com.alee.laf.WebLookAndFeel.install(WebLookAndFeel.java:932)
at com.alee.laf.WebLookAndFeel.install(WebLookAndFeel.java:918)
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 xx.ByteCodeClassLoader.main(ByteCodeClassLoader.java:178)
Caused by: java.lang.RuntimeException: Provider for class javax.xml.parsers.DocumentBuilderFactory cannot be created
... 24 more
Caused by: java.util.ServiceConfigurationError: javax.xml.parsers.DocumentBuilderFactory: Error locating configuration files
at java.util.ServiceLoader.fail(Unknown Source)
at java.util.ServiceLoader.access$100(Unknown Source)
at java.util.ServiceLoader$LazyIterator.hasNextService(Unknown Source)
at java.util.ServiceLoader$LazyIterator.hasNext(Unknown Source)
at java.util.ServiceLoader$1.hasNext(Unknown Source)
at javax.xml.parsers.FactoryFinder$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
... 24 more
Caused by: java.io.IOException: Cannot fetch URL out of res
at xx.ByteCodeClassLoader.findResources(ByteCodeClassLoader.java:72)
at java.lang.ClassLoader.getResources(Unknown Source)
... 29 more
java.lang.NullPointerException
at com.alee.utils.XmlUtils.processAnnotations(XmlUtils.java:141)
at com.alee.laf.WebLookAndFeel$2.propertyChange(WebLookAndFeel.java:855)
at java.beans.PropertyChangeSupport.fire(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at javax.swing.event.SwingPropertyChangeSupport.firePropertyChange(Unknown Source)
at java.beans.PropertyChangeSupport.firePropertyChange(Unknown Source)
at javax.swing.UIManager.setLookAndFeel(Unknown Source)
at com.alee.laf.WebLookAndFeel.install(WebLookAndFeel.java:932)
at com.alee.laf.WebLookAndFeel.install(WebLookAndFeel.java:918)
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 xx.ByteCodeClassLoader.main(ByteCodeClassLoader.java:178)
After this, the JAR runs successfully until it has to load the GUI. Then it crashes with another error:
javax.xml.parsers.FactoryConfigurationError: Provider for class javax.xml.parsers.DocumentBuilderFactory cannot be created
My Code is the following:
public class ByteCodeClassLoader extends ClassLoader {
final Map<String, byte[]> classes;
final Map<String, byte[]> res;
-snip-
#Override
protected Class<?> findClass(String name) throws ClassNotFoundException {
byte[] code = classes.get(name);
if (code != null){
return defineClass(name, code, 0, code.length);
}
return super.findClass(name);
}
#Override
public URL getResource(String name) {
URL ur = ByteCodeClassLoader.class.getResource(name);
if (ur != null) {
return ur;
}
try {
return new URL(null, "bytes:///" + name, new BytesHandler());
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
#Override
public InputStream getResourceAsStream(String name) {
return new ByteArrayInputStream(res.get(name));
}
#Override
protected Enumeration<URL> findResources(String name) throws IOException {
throw new IOException("Cannot fetch URL out of res");
}
-snip-
If you know a solution to this issue, it would help me greatly. Even just a lead in the right direction would be awesome. I hope I supplied all the important information.

java mysql db connection

i'm new in java.
I'm trying to connect mysql DB in java
i've got this
mysql.java file:
package program;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.Properties;
public class mysql {
private static final String DATABASE_DRIVER = "com.mysql.jdbc.Driver";
private static final String DATABASE_URL = "jdbc:mysql://mysql.cba.pl:3306/dbname";
private static final String USERNAME = "login";
private static final String PASSWORD = "pass";
private static final String MAX_POOL = "250";
private Connection connection;
private Properties properties;
private Properties getProperties() {
if (properties == null) {
properties = new Properties();
properties.setProperty("user", USERNAME);
properties.setProperty("password", PASSWORD);
properties.setProperty("MaxPooledStatements", MAX_POOL);
}
return properties;
}
public Connection connect() {
if (connection == null) {
try {
Class.forName(DATABASE_DRIVER);
connection = DriverManager.getConnection(DATABASE_URL, getProperties());
} catch (ClassNotFoundException | SQLException e) {
e.printStackTrace();
}
}
return connection;
}
public void disconnect() {
if (connection != null) {
try {
connection.close();
connection = null;
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
main java file:
package program;
public class main {
public static void main(String[] args){
mysql db = new mysql();
db.connect();
}
}
and i'm getting following errors
java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at komunikator.mysql.connect(mysql.java:31)
at komunikator.main.main(main.java:7)
I downloaded ojdbc6-11.2.0.2.0.jar and put in my project folder, after that i add library from jar file.
What i'm doing wrong ?
I'm really new in java so i hope somebody can help me as well :)
I'm using Eclipse Standard/SDK
Version: Kepler Release
Build id: 20130614-0229

ou need to use com.mysql.jdbc_5.1.5 driver for mysql connection and paste jar file in to WEB-INF>Lib folder and use the path of jar file into property>buildpath and use external jar.

it will be a normal desktop application
ok, i changed it on com.mysql.jdbc_5.1.5 driver, i paste this in project path with others .java files and added like u said in properties.
Now i'm getting this:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Last packet sent to the server was 0 ms ago.
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2104)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:729)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:283)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at program.mysql.connect(mysql.java:32)
at program.main.main(main.java:7)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at java.net.Socket.<init>(Unknown Source)
at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:256)
at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:276)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2027)
... 13 more
Is mysql.java file correct ?
Edit:
i tried change this
private static final String DATABASE_DRIVER = "com.mysql.jdbc.Driver";
on
"com.mysql.jdbc_5.1.5.Driver"
and i am gettin some less errors
java.lang.ClassNotFoundException: com.mysql.jdbc_5.1.5.Driver
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at program.mysql.connect(mysql.java:31)
at program.main.main(main.java:7)

Ok, almost i've got this. One thing more.
When im trying connect to on-line DB i got this:
SQLException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
SQLState: 08S01
VendorError: 0
on localhost DB (xamp) it's working fine
what is going on ?

Errors with JADE platform

Good evening, I tried to use the JADE platform (official site -> http://jade.tilab.com/)
I followed tutorials that I found on youtube
Here's the code
import jade.core.Profile;
import jade.core.ProfileImpl;
import jade.core.Runtime;
import jade.util.ExtendedProperties;
import jade.util.leap.Properties;
import jade.wrapper.AgentContainer;
import jade.wrapper.ControllerException;
public class MainContainer {
public static void main(String[] args) {
try {
Runtime rt = Runtime.instance();
Properties p = new ExtendedProperties();
p.setProperty(Profile.GUI, "true");
ProfileImpl pc = new ProfileImpl(p);
AgentContainer container = rt.createAgentContainer(pc);
container.start();
} catch (ControllerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
But when I run the program I get errors like:
Exception in thread "main" java.lang.NoClassDefFoundError: jade/wrapper/ControllerException
****at java.lang.Class.getDeclaredMethods0(Native Method)
****at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
****at java.lang.Class.getMethod0(Unknown Source)
****at java.lang.Class.getMethod(Unknown Source)
****at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
****at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: jade.wrapper.ControllerException
****at java.net.URLClassLoader$1.run(Unknown Source)
****at java.net.URLClassLoader$1.run(Unknown Source)
****at java.security.AccessController.doPrivileged(Native Method)
****at java.net.URLClassLoader.findClass(Unknown Source)
****at java.lang.ClassLoader.loadClass(Unknown Source)
****at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
****at java.lang.ClassLoader.loadClass(Unknown Source)
****... 6 more
How To fix it please !
PS: I'm on windows7

You are missing jade's jar from your classpath. You could add it to the -cp parameter of java. E.g.:
java -cp JADE-all-4.3.2.zip MainContainer

ServerException is being thrown while binding RMI service

I'm trying to build simple echo server as RMI application (step by step as it's described in Sun tutorial).
All source code is shown below, it's very simple:
package test;
import java.rmi.Remote;
import java.rmi.RemoteException;
public interface EchoServer extends Remote {
public String sendString (String str) throws RemoteException;
}
package test;
import java.rmi.server.UnicastRemoteObject;
import java.rmi.RemoteException;
public class EchoServerImpl extends UnicastRemoteObject implements EchoServer {
public EchoServerImpl () throws RemoteException {
super ();
}
public String sendString (String str) throws RemoteException {
return str.toUpperCase();
}
}
package test;
import java.rmi.Naming;
public class RMIServer {
public RMIServer () {
try {
EchoServer eServer = new EchoServerImpl ();
Naming.rebind ("rmi://localhost:1099/EchoService", eServer); // <--exception
} catch (Exception e) {
e.printStackTrace ();
}
}
public static void main(String[] args) {
new RMIServer ();
}
}
I compile code with rmic and I see file EchoServerImpl_Stub.class. After that I run 'rmiregistry' and then I start RMIServer. And at that moment I see ServerException:
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: test.EchoServerImpl_Stub
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(StreamRemoteCall.java:255)
at sun.rmi.transport.StreamRemoteCall.executeCall(StreamRemoteCall.java:233)
at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:359)
at sun.rmi.registry.RegistryImpl_Stub.rebind(Unknown Source)
at java.rmi.Naming.rebind(Naming.java:160)
at test.RMIServer.(RMIServer.java:10)
at test.RMIServer.main(RMIServer.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
Caused by: java.rmi.UnmarshalException: error unmarshalling arguments; nested exception is:
java.lang.ClassNotFoundException: test.EchoServerImpl_Stub
at sun.rmi.registry.RegistryImpl_Skel.dispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.oldDispatch(Unknown Source)
at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source)
at sun.rmi.transport.Transport$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: test.EchoServerImpl_Stub
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at sun.rmi.server.LoaderHandler.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader$2.loadClass(Unknown Source)
at java.rmi.server.RMIClassLoader.loadClass(Unknown Source)
at sun.rmi.server.MarshalInputStream.resolveClass(Unknown Source)
at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source)
at java.io.ObjectInputStream.readClassDesc(Unknown Source)
at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
at java.io.ObjectInputStream.readObject0(Unknown Source)
at java.io.ObjectInputStream.readObject(Unknown Source)
... 12 more
I think it's a common problem and it's probably connected with wrong deploying. How to fix it?

I think it's your rmiregistry classpath. The test.EchoServer interface needs to be accessible to the rmiregistry itself. Set your CLASSPATH environment variable before you run up the rmiregistry e.g.
C:\>set CLASSPATH="MyBinFolder"
C:\>rmiregistry
Also, rmic is a hangover from before Java 5. It isn't necessary to run it anymore. Just run your server and client as normal and the proxies will be created dynamically.
Regards,
MK

Listing a local directory from a signed applet

The following applet is compiled and packed into jar which is then signed with a self-signed cert.
import java.applet.Applet;
import java.io.File;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
public class Test extends Applet {
private static final long serialVersionUID = -3127185193501384816L;
private final class DirectoryLister implements PrivilegedAction<File[]> {
private final String attachmentsFolder;
private DirectoryLister(String attachmentsFolder) {
this.attachmentsFolder = attachmentsFolder;
}
public File[] run() {
return new File(attachmentsFolder).listFiles();
}
}
public File[] getFiles() throws PrivilegedActionException {
String attachmentsFolder = getParameter("attachmentsFolder");
if (attachmentsFolder != null) {
return AccessController.doPrivileged(new DirectoryLister(
attachmentsFolder));
}
return null;
}
}
Applet is instantiated as follows:
<applet id="applet"
code="Test"
archive="applet.jar">
<param name="attachmentsFolder"
value="c:/test" />
</applet>
Applet is used as follows:
var files = applet.getFiles();
for (var file in files) {
// Do something to file.
}
The ff. error is encountered:
java.security.PrivilegedActionException: java.lang.reflect.InvocationTargetException
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation$2.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.plugin.liveconnect.SecureInvocation.CallMethod(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSInvoke.invoke(Unknown Source)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)
at sun.plugin.liveconnect.PrivilegedCallMethodAction.run(Unknown Source)
... 4 more
Caused by: java.security.AccessControlException: access denied (java.io.FilePermission c:\test read)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkRead(Unknown Source)
at java.io.File.list(Unknown Source)
at java.io.File.listFiles(Unknown Source)
at Test$DirectoryLister.run(Test.java:20)
at Test$DirectoryLister.run(Test.java:1)
at java.security.AccessController.doPrivileged(Native Method)
at Test.getFiles(Test.java:28)
... 14 more
Which leads me to ask if I still need to explicitly grant perms in one of the config files in the Java home directory to read c:/test? If so, can anyone point me to a guide on how to do this?

Caching problem apparently. Clearing all caches and re-building/re-deploying solved the problem. I.e., no additional perms set-up needed.