JPAContainer with javax.persistence.PersistenceException: Exception [Eclips

I found the problem is I used import to add the mysql-connector-java-5.0.8-bin.jar file under the
WebContent\WEB-INF\lib which will not find com.mysql.jdbc.Driver class.

To Fix, just copy the entire mysql-connector-java-5.0.8-bin.jar and put under the WebContent\WEB-INF\lib
please see attachment fixed.jpg file.

James Ho: HI, I am using JPAContainer to connect with MySQL database.

I have included ConnectorJ with MySQL in the library and under the folder of WEB-INF/lib, please see attachment file.

Anyone has the same problem and knows how to solve it?

when I use the same code and persistence file in another project it works fine. but with this project it gives me

javax.persistence.PersistenceException: Exception [EclipseLink-4003] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.DatabaseException
Exception Description: Configuration error. Class [com.mysql.jdbc.Driver] not found.

Here is my code

package com.example.displaydatabase;

import javax.persistence.PersistenceContext;
import javax.servlet.annotation.WebServlet;

import com.howinecafe.bean.MemberBean;
import com.vaadin.addon.jpacontainer.JPAContainer;
import com.vaadin.addon.jpacontainer.JPAContainerFactory;
import com.vaadin.annotations.Theme;
import com.vaadin.annotations.VaadinServletConfiguration;
import com.vaadin.server.VaadinRequest;
import com.vaadin.server.VaadinServlet;
import com.vaadin.ui.Table;
import com.vaadin.ui.UI;
import com.vaadin.ui.VerticalLayout;

@PersistenceContext(name="persistence/em",unitName="MEMBERBEAN")
@SuppressWarnings("serial")
@Theme("displaydatabase")
public class DisplaydatabaseUI extends UI {

   public static final String PERSISTENCE_UNIT = "MEMBERBEAN";


   @WebServlet(value = "/*", asyncSupported = true)
   @VaadinServletConfiguration(productionMode = false, ui = DisplaydatabaseUI.class)
   public static class Servlet extends VaadinServlet {
   }

   @Override
   protected void init(VaadinRequest request) {
       final VerticalLayout layout = new VerticalLayout();
       layout.setMargin(true);
       setContent(layout);

       JPAContainer<MemberBean> memberContainer = JPAContainerFactory.make(MemberBean.class,"MEMBERBEAN");

       Table myTable = new Table("This is my Table",memberContainer);
       myTable.setSelectable(true);
       myTable.setImmediate(true);
       layout.addComponent(myTable);
   }

}

Persistence File

<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="
http://java.sun.com/xml/ns/persistence
http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
   version="2.0">

   <persistence-unit name="MEMBERBEAN">

   <provider>
org.eclipse.persistence.jpa.PersistenceProvider
   </provider>

       <exclude-unlisted-classes>false</exclude-unlisted-classes>

       <properties>
           <property name="eclipselink.jdbc.platform"
               value="org.eclipse.persistence.platform.database.MySQLPlatform" />

           <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />

           <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/howine_db"/>

           <property name="javax.persistence.jdbc.user" value="root" />
           <property name="javax.persistence.jdbc.password" value="1025ho" />

           <property name="eclipselink.logging.level" value="FINE" />

           <property name="eclipselink.ddl-generation" value="create-tables" />

           <property name="eclipselink.ddl-generation.output-mode" value="database"/>
   </properties>
</persistence-unit>

</persistence>

fixed.jpg (538.6 kB)

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JPAContainer with javax.persistence.PersistenceException: Exception [Eclips

Important Notice - Forums is archived

Vaadin lets you build secure, UX-first PWAs entirely in Java.Free ebook & tutorial.

JPAContainer with javax.persistence.PersistenceException: Exception [Eclips

Vaadin lets you build secure, UX-first PWAs entirely in Java.
Free ebook & tutorial.