1 Reply Latest reply on Apr 8, 2010 9:14 AM by blabno

    Entity Manager config problems

    crashmeister.seamforum2009.3dpilots.com
    crashmeister.seamforum2009.3dpilots.com Apr 7, 2010 10:05 PM

      I an getting a NullPointerException when trying to use the Entity Manager.


      Code Snippet:


      public class TestWs {
  @In
  private EntityManager entityMgr;

  public TestWs() {
  }

  @GET
  @Produces({"application/xml"})
  public Response getMessage(@QueryParam("orderId") final long orderId) {

    ResponseBuilder rspBuilder = null;

    try {
      System.out.println("\nOrder ID = " + orderId);
      if (entityMgr == null) {
        System.out.println("\nStupid em is null.\n");
      }
      ...
    }



      From components.xml:




        <persistence:managed-persistence-context
    name="entityMgr"
    auto-create="true"
    persistence-unit-jndi-name="java:/restEntityManagerFactory"/>



      From persistence.xml:




        <persistence-unit name="rest">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>java:/RestfulDS</jta-data-source>
    <properties>
      <property name="hibernate.dialect"         value="org.hibernate.dialect.Oracle9iDialect"/>
      <property name="hibernate.show_sql"        value="true"/>
      <property name="hibernate.format_sql"      value="true"/>
      <property name="hibernate.jdbc.batch_size" value="1000"/>
      <property name="hibernate.default_schema"  value="OT_APPS"/>
      <property name="jboss.entity.manager.factory.jndi.name" value="java:/restEntityManagerFactory"/>
    </properties>
  </persistence-unit>



      From the log:




      2010-04-07 15:50:25,216 INFO  [STDOUT] (http-127.0.0.1-8080-1) 
Order ID = 1234
2010-04-07 15:50:25,216 INFO  [STDOUT] (http-127.0.0.1-8080-1) 
Stupid em is null.
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1) java.lang.NullPointerException
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at com.mailexpress.webservice.rest.tracking.service.TestWs.getMessage(TestWs.java:34)
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at java.lang.reflect.Method.invoke(Method.java:597)
2010-04-07 15:50:25,216 ERROR [STDERR] (http-127.0.0.1-8080-1)      at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:124)



      Any ideas ?


      Thanks,
      Craig.