RE: EntityManager is null

[Tom Leung]

A lot of reason causes null pointer exception, 

post the detail error log, so let us know what the problem you encounter.

 

Best Rgds,

 

Tom

 

 

From: Robert Wheeler [mailto:rwheele...@gmail.com] 
Sent: Wednesday, July 24, 2013 1:39 AM
To: user@aries.apache.org
Subject: EntityManager is null

 

I have a very basic sample I am trying to insert a record into a database.
I keep getting a NullPointer when I try to persist my record and when I
debug I see that the EntityManager is null.  I am including my
persistence.xml and blueprint.xml files and any help would be appreciated.

 

 

<?xml version="1.0" encoding="UTF-8"?>

<blueprint xmlns="http://www.osgi.org/xmlns/blueprint/v1.0.0";

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";

xmlns:cm="http://aries.apache.org/blueprint/xmlns/blueprint-cm/v1.0.0";

xmlns:camel="http://camel.apache.org/schema/blueprint";

xmlns:jpa="http://aries.apache.org/xmlns/jpa/v1.1.0";

xmlns:tx="http://aries.apache.org/xmlns/transactions/v1.0.0";>

 

<bean id="personDAO"

class="com.novatus.simpletransaction.dao.PersonDAO">

<tx:transaction method="*" value="Required" />

<jpa:context property="entityManager" unitname="simpleTrans" />

</bean>

<bean id="personRoute"
class="com.novatus.simpletransaction.route.PersonRoute" />

  

<camelContext xmlns="http://camel.apache.org/schema/blueprint";>

<routeBuilder ref="personRoute" />

</camelContext>

 

   <bean id="dataSource" class="org.postgresql.ds.PGPoolingDataSource"
destroy-method="close">

      <property name="serverName" value="localhost/database"/>

      <property name="user" value="username"/>

      <property name="password" value="password"/>

      <property name="dataSourceName" value="myConnectionPool"/>

      <property name="initialConnections" value="2"/>

      <property name="maxConnections" value="4" />

  </bean>

  

  <service interface="javax.sql.DataSource" ref="dataSource">

    <service-properties>

            <entry key="osgi.jndi.service.name
<http://osgi.jndi.service.name/> " value="jdbc/postgresds"/>

    </service-properties>

  </service>

 

</blueprint>

 

<?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="simpleTrans" transaction-type="JTA">

    <description>Persistence unit for the example blogging
application</description>

 

 
<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>

 
<jta-data-source>osgi:service/javax.sql.DataSource/(osgi.jndi.service.name
<http://osgi.jndi.service.name/> =jdbc/postgresds)</jta-data-source>

    <class>com.novatus.simpletransaction.entity.Person</class>

    <exclude-unlisted-classes>true</exclude-unlisted-classes>

     <properties>

<property name="openjpa.Log" value="DefaultLevel=TRACE,Runtime=TRACE,

Tool=TRACE,SQL=TRACE,Enhance=TRACE" />

    </properties>

   

  </persistence-unit>

</persistence>

 

 

 

Thanks Robert