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POIOException in EJB3
 

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  1. POIOException in EJB3
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    <p>So I kind of asked this question before but I didn't get quiet what i needed. I am new with JAVA entreprise editon and EJB3 and i am using it to create a Session bean on a JBOSS server v4.0. So here is my exact problem my buisness method on the bean must creates a file save on it some String sent by the client, so i am obliged to throw an IOExcpetion. I tried a Hello world with EJB3 and it worked but the moment i start to use Exceptions on my bean my client no longer conncts the server bean. i will give you the code of my bean and my client and the error i get and can someone please help me because i kind of tried everthing i could and still the same error, it is an engineering projet and i am really runnig out of time,still only two weeks to go :( My session Bean code package com.et; </p> <pre><code>import java.io.BufferedWriter; import java.io.File; import java.io.FileWriter; import java.io.IOException; import java.io.PrintWriter; import javax.ejb.Stateless; import com.gestionfichier.gestion.GestionFichier; @Stateless public class EnvoiCodeExceptionBean implements EnvoiCodeException { public String EnvoiCode(String Code) throws IOException { PrintWriter ecrivain = null; File f=GestionFichier.CreerFichier("temp"); ecrivain = new PrintWriter(new BufferedWriter(new FileWriter(f))); ecrivain.println(Code); ecrivain.close(); throw new IOException("error"); } } </code></pre> <p>My client code</p> <pre><code> import java.io.IOException; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import com.et.EnvoiCodeException; public class AppelClient { public static void main(String[] args) throws IOException { try { Context context = new InitialContext(); EnvoiCodeException beanRemote = (EnvoiCodeException) context.lookup("EnvoiCodeExceptionBean/remote"); beanRemote.EnvoiCode("some Sring to send"); } catch (NamingException e) { e.printStackTrace(); } } } </code></pre> <p>and what i get on my Eclipse Console </p> <pre><code> Exception in thread "main" java.lang.reflect.UndeclaredThrowableException at $Proxy0.EnvoiCode(Unknown Source) at AppelClient.main(AppelClient.java:14) Caused by: java.lang.ClassNotFoundException: [Ljava.lang.StackTraceElement; 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) at org.jboss.remoting.loading.RemotingClassLoader.loadClass(RemotingClassLoader.java:50) at org.jboss.remoting.loading.ObjectInputStreamWithClassLoader.resolveClass(ObjectInputStreamWithClassLoader.java:139) at java.io.ObjectInputStream.readNonProxyDesc(Unknown Source) at java.io.ObjectInputStream.readClassDesc(Unknown Source) at java.io.ObjectInputStream.readArray(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.defaultReadObject(Unknown Source) at java.lang.Throwable.readObject(Throwable.java:913) 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 java.io.ObjectStreamClass.invokeReadObject(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.defaultReadObject(Unknown Source) at java.lang.Throwable.readObject(Throwable.java:913) 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 java.io.ObjectStreamClass.invokeReadObject(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.defaultReadObject(Unknown Source) at java.lang.Throwable.readObject(Throwable.java:913) 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 java.io.ObjectStreamClass.invokeReadObject(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.defaultReadObject(Unknown Source) at java.lang.Throwable.readObject(Throwable.java:913) 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 java.io.ObjectStreamClass.invokeReadObject(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.defaultReadFields(Unknown Source) at java.io.ObjectInputStream.readSerialData(Unknown Source) at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source) at java.io.ObjectInputStream.readObject0(Unknown Source) at java.io.ObjectInputStream.readObject(Unknown Source) at org.jboss.remoting.serialization.impl.java.JavaSerializationManager.receiveObject(JavaSerializationManager.java:128) at org.jboss.remoting.marshal.serializable.SerializableUnMarshaller.read(SerializableUnMarshaller.java:66) at org.jboss.remoting.transport.socket.SocketClientInvoker.transport(SocketClientInvoker.java:279) at org.jboss.remoting.RemoteClientInvoker.invoke(RemoteClientInvoker.java:143) at org.jboss.remoting.Client.invoke(Client.java:525) at org.jboss.remoting.Client.invoke(Client.java:488) at org.jboss.aspects.remoting.InvokeRemoteInterceptor.invoke(InvokeRemoteInterceptor.java:55) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.tx.ClientTxPropagationInterceptor.invoke(ClientTxPropagationInterceptor.java:61) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.aspects.security.SecurityClientInterceptor.invoke(SecurityClientInterceptor.java:53) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.remoting.IsLocalInterceptor.invoke(IsLocalInterceptor.java:77) at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) at org.jboss.ejb3.stateless.StatelessRemoteProxy.invoke(StatelessRemoteProxy.java:102) ... 2 more </code></pre>
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    1. COI deleted my answer because I think it is wrong anyway. Read the documentation on [UndeclaredThrowable](http://docs.oracle.com/javase/7/docs/api/java/lang/reflect/UndeclaredThrowableException.html). Do you know if the request receives your server (log it)?
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    2. COI read the documentation and the EJB restrictions and i think that EJB does not handle the use of IOExceptions and the use of files in a Bean for some security reasons so it launched an exception that was not thrown by my bean. So it seems that using EJB3 for this kind of projet is a hopeless case. Any solutions something like interceptors to handle these exceptions because i really dont have time to swith and learn something else
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    3. COWhy do you explicitly throw IOException in any case? That seems pointless. If you want to return the exception and you believe the user can handle it, you could catch the IOException and throw a more relevant exception with details.
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      1. USEvan Knowles
 

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