Tapestry grid not working with JPA.

Wed, 23 Nov 2011 01:03:36 -0800 

Hello,

 

While I am trying to display tapestry grid it throws following exception.

 

Render queue error in SetupRender[Displayperson:grid]: Failure reading
parameter 'source' of component Displayperson:grid: Failed to create
EntityManagerFactory for persistence unit 'JPATESTDB'

 

My persistence.xml looks like as 

 

<?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
persistence_2_0.xsd
<http://java.sun.com/xml/ns/persistence%20persistence_2_0.xsd> "

                version="2.0">

    <persistence-unit name="JPATESTDB" transaction-type="RESOURCE_LOCAL">

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

        <properties>

            <property name="javax.persistence.jdbc.driver"
value="oracle.jdbc.driver.OracleDriver"/>

            <property name="javax.persistence.jdbc.url"
value="jdbc:oracle:thin:@172.20.1.115:5584:PLTDEV"/>

            <property name="javax.persistence.jdbc.user" value="rage"/>

            <property name="javax.persistence.jdbc.password" value="RAGE"/>

        </properties>

    </persistence-unit>

</persistence>

 

My tml file.

 

<html t:type="layout" title="Person List"

  xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd";>

 

    <h1>Person List</h1>

 

                <t:grid source="persons" t:include="fname,lname,age"/>

                

                <t:form t:id="displayperson">

 

                    <table>

                                <tr>

                                                <td>

                                                <t:submit t:id="submit"
value="New Person"/>

                                </td>

                        </tr>

                    </table>

 

    </t:form>

                

</html>

 

My corresponding component class.

 

package com.rage.tutorial.pages;

 

import java.util.List;

 

import org.apache.tapestry5.annotations.InjectPage;

 

import com.rage.tutorial.entities.Person;

import javax.persistence.EntityManager;

import javax.persistence.PersistenceContext;

 

/**

* Start page of application tutorial1.

*/

public class Displayperson

{

 

                @PersistenceContext(unitName = "JPATESTDB")

                private EntityManager entityManager;

                

                @InjectPage

                private Createperson createperson;

 

                public List<Person> getPersons()

    {

                                return entityManager.createQuery("from
Person", Person.class).getResultList();

    }

                

    Object onSuccessFromDisplayperson()

    {

                return createperson;

    }

}

 

So please help.

 

Thanks & Regards,

 

Saurabh Jain


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