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EJB java.lang.NoClassDefFoundError: javax/persistence/EntityManager
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created by <a href="https://community.jboss.org/people/squarcio">marco squarcini</a> in <i>EJB3</i> - <a href="https://community.jboss.org/message/826760#826760">View the full discussion</a>
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<div class="jive-rendered-content"><p><span class="short_text" id="result_box" lang="en"><span class="hps">Hello</span> <span class="hps">to all,</span></span></p><p><span class="short_text" lang="en"><span class="hps">I'm new to javaEE and JBoss AS and </span></span><span class="short_text" id="result_box" lang="en"><span class="hps">i</span><span>'m trying to learn developing EJB applications but i have a problem i don't know how to solve.</span></span></p><p><span class="short_text" id="result_box" lang="en"><span>I use NetBeans 7.3 and JBoss AS 7.1.1.</span></span></p><p><span class="short_text" id="result_box" lang="en"><span>I have been created an EJB 3.1 module with an entity bean and a session bean with remote interface that </span></span><span id="result_box" lang="en"><span class="hps">performs the</span> <span class="hps">database operations</span> <span class="hps">using the entity bean.</span></span></p><p><span lang="en"><span class="hps">After i have been created a java application to access the EJB module:</span></span></p><ol><li style="text-align: start;"><span lang="en"><span class="hps">inside the library of the project i put the jboss-client.jar and the EJB module.jar files</span></span></li><li style="text-align: start;"><span lang="en"><span class="hps">i have been created a config package with the jboss-ejb-client.properties file</span></span></li><li style="text-align: start;"><span lang="en"><span class="hps">i lookup the bean with the method :<br/></span></span></li></ol><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>public static ControllerPrenotazioniRemote lookupRemoteControllerPrenotazioni() throws NamingException {</p><p>        final Hashtable jndiProperties = new Hashtable();</p><p>        jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        final Context context = new InitialContext(jndiProperties);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        final String appName = "";</p><p>        final String moduleName = "EJBModule1";</p><p>        final String distinctName = "";</p><p>        final String beanName = ControllerPrenotazioni.class.getSimpleName();</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        final String viewClassName = ControllerPrenotazioniRemote.class.getName();</p><p>        System.out.println("Looking EJB via JNDI ");</p><p>        System.out.println("ejb:" + appName + "/" + moduleName + "/" + distinctName + "/" + beanName + "!" + viewClassName);</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>        return (ControllerPrenotazioniRemote) context.lookup("ejb:/EJBModule1/ControllerPrenotazioni!"</p><p>                + ControllerPrenotazioniRemote.class.getName() + "?stateful");</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>    }</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>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:</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Exception in thread "main" java.lang.NoClassDefFoundError: javax/persistence/EntityManager</p><p>    at controllers.ControllerPrenotazioni.trovaPrenotazione(ControllerPrenotazioni.java:133)</p><p>    at principale.Main.main(Main.java:22)</p><p>Caused by: java.lang.ClassNotFoundException: javax.persistence.EntityManager</p><p>    at java.net.URLClassLoader$1.run(URLClassLoader.java:366)</p><p>    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)</p><p>    at java.security.AccessController.doPrivileged(Native Method)</p><p>    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)</p><p>    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)</p><p>    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)</p><p>    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)</p><p>    ... 2 more</p><p>Java Result: 1</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span class="short_text" id="result_box" lang="en"><span class="hps">I do not know</span> <span class="hps">where</span> <span class="hps">I'm wrong!S</span></span>omeone can help me to solve this problem?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thank you to all in advance....</p></div>
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