Jersey + Mysql + Hibernate/JPA + Glassfish v2.1

From: Roan Brasil Monteiro <roanbrasil_at_gmail.com>
Date: Wed, 14 Oct 2009 15:47:34 -0300

Can someone help me with it, please? Well I have it only to test, when I am
using like that is working:

emf = Persistence.createEntityManagerFactory("citespace-jpa");
           this.em = emf.createEntityManager();

           em.getTransaction().begin();
           Place p = new Place();
           p.setName("Roan");
           em.persist(p);
           em.getTransaction().commit();
           em.close();
           emf.close();

This way I am getting NullPointerException

@PersistenceContext(unitName="citespace-jpa")
       EntityManager em;

       @GET
       @Produces("text/plain")
       public String getIt() {
           StringBuilder strb = new StringBuilder();

           Place p = em.find(Place.class, 1);
           strb.append(p.getId()+":"+p.getName());

Can someone help with that, please?

My persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
    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_1_0.xsd">
    <persistence-unit name="citespace-jpa" transaction-type="RESOURCE_LOCAL"
>
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <jta-data-source>jdbc/TestDS</jta-data-source>
         

        <properties>
         <property name="hibernate.dialect"
value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
         <property name="hibernate.hbm2ddl.auto" value="update"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>
        </properties>
    </persistence-unit>
</persistence>

and my web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="
http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="
http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <servlet>
        <servlet-name>Jersey Web Application</servlet-name>

<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>com.sun.jersey.config.property.packages</param-name>
            <param-value>com.citespace.citespacerest</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Jersey Web Application</servlet-name>
        <url-pattern>/webresources/*</url-pattern>
    </servlet-mapping>
</web-app>

-- 
Atenciosamente,
Roan Brasil Monteiro
http://roanbrasil.wordpress.com/