marco squarcini [
https://community.jboss.org/people/squarcio] created the discussion
"EJB java.lang.NoClassDefFoundError: javax/persistence/EntityManager"
To view the discussion, visit:
https://community.jboss.org/message/826760#826760
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Hello to all,
I'm new to javaEE and JBoss AS and i'm trying to learn developing EJB applications
but i have a problem i don't know how to solve.
I use NetBeans 7.3 and JBoss AS 7.1.1.
I have been created an EJB 3.1 module with an entity bean and a session bean with remote
interface that performs the database operations using the entity bean.
After i have been created a java application to access the EJB module:
1. inside the library of the project i put the jboss-client.jar and the EJB module.jar
files
2. i have been created a config package with the jboss-ejb-client.properties file
3. i lookup the bean with the method :
public static ControllerPrenotazioniRemote lookupRemoteControllerPrenotazioni() throws
NamingException {
final Hashtable jndiProperties = new Hashtable();
jndiProperties.put(Context.URL_PKG_PREFIXES,
"org.jboss.ejb.client.naming");
final Context context = new InitialContext(jndiProperties);
final String appName = "";
final String moduleName = "EJBModule1";
final String distinctName = "";
final String beanName = ControllerPrenotazioni.class.getSimpleName();
final String viewClassName = ControllerPrenotazioniRemote.class.getName();
System.out.println("Looking EJB via JNDI ");
System.out.println("ejb:" + appName + "/" + moduleName +
"/" + distinctName + "/" + beanName + "!" + viewClassName);
return (ControllerPrenotazioniRemote)
context.lookup("ejb:/EJBModule1/ControllerPrenotazioni!"
+ ControllerPrenotazioniRemote.class.getName() + "?stateful");
}
I deploy the EJB module less problems,but when i try to run the java application i see thi
error in the output tab of NetBeans:
Exception in thread "main" java.lang.NoClassDefFoundError:
javax/persistence/EntityManager
at
controllers.ControllerPrenotazioni.trovaPrenotazione(ControllerPrenotazioni.java:133)
at principale.Main.main(Main.java:22)
Caused by: java.lang.ClassNotFoundException: javax.persistence.EntityManager
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 2 more
Java Result: 1
I do not know where I'm wrong!Someone can help me to solve this problem?
Thank you to all in advance....
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