Exception regarding runtime optimization using openJPA MySQL

Question

There must be a bunch of questions regarding this, and I have read a few, but the answer still eludes me. I am new to JPA and I am just trying to test a simple application to see if I can configure the thing properly. It is a stand alone application meaning it will not be run with a web server or anything. The entity class looks like:

@Entity
public class Person{

    @Id
    private String userID = null;

    @Transient
    private UserState userState = null;

    private String email = null;
    private String name = null;


    public Person(){
        userID = null;
        email = null;
        name = null;
        userState = null;
    }

    public String getUserID() {
        return userID;
    }

    public void setUserID(String userID) {
        this.userID = userID;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public UserState getUserState() {
        return userState;
    }

    public void setUserState(UserState userState) {
        this.userState = userState;
    }

}

The main:

public class PersistenceTest {

    public static void main(String[] args) {
        System.out.println("creating person");
        Person p = new Person();
        p.setUserID("GregR");
        p.setEmail("[email protected]");
        p.setUserState(UserState.ACTIVE);
        System.out.println("done creating person GregR");


        EntityManagerFactory factory = Persistence.createEntityManagerFactory(PersonService.PERSISTENCE_UNIT_NAME);
        System.out.println("factory initialized");
        EntityManager manager = factory.createEntityManager();
        System.out.println("EntityManager initialized");
        PersonService service = new PersonService(manager);
        System.out.println("service initialized");

        System.out.println("Beginning transaction");
        manager.getTransaction().begin();
        System.out.println("Transaction begun");

        System.out.println("attempting to persist person");
        service.persistEntity(p);
        manager.getTransaction().commit();
        System.out.println("person persisted");

        System.out.println("beginning cleanup");
        manager.close();
        factory.close();
        System.out.println("Cleanup has completed");
    }
}

The config:

<?xml version="1.0"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">
    <persistence-unit name="PersonService" transaction-type="RESOURCE_LOCAL">
        <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
        <class>de.hol.persistable.entities.Person</class>
        <properties>
            <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver"/>
            <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/ConnectionWikisDB"/>
            <property name="javax.persistence.jdbc.user" value="GregR"/>
            <property name="javax.persistence.jdbc.password" value="myPassword"/>
        </properties>
    </persistence-unit>
</persistence>

The console printout:

creating person
done creating person GReeder
factory initialized
47  PersonService  INFO   [main] openjpa.Runtime - Starting OpenJPA 2.3.0
110  PersonService  INFO   [main] openjpa.jdbc.JDBC - Using dictionary class "org.apache.openjpa.jdbc.sql.MySQLDictionary".
306  PersonService  INFO   [main] openjpa.jdbc.JDBC - Connected to MySQL version 5.5 using JDBC driver MySQL-AB JDBC Driver version mysql-connector-java-5.0.8 ( Revision: ${svn.Revision} ). 
Exception in thread "main" <openjpa-2.3.0-r422266:1540826 nonfatal user error> org.apache.openjpa.persistence.ArgumentException: This configuration disallows runtime optimization, but the following listed types were not enhanced at build time or at class load time with a javaagent: "
de.hol.persistable.entities.Person".
    at org.apache.openjpa.enhance.ManagedClassSubclasser.prepareUnenhancedClasses(ManagedClassSubclasser.java:115)
    at org.apache.openjpa.kernel.AbstractBrokerFactory.loadPersistentTypes(AbstractBrokerFactory.java:312)
    at org.apache.openjpa.kernel.AbstractBrokerFactory.initializeBroker(AbstractBrokerFactory.java:236)
    at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:212)
    at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:155)
    at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:226)
    at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:153)
    at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:59)
    at de.hol.persistable.PersistenceTest.main(PersistenceTest.java:24)

My Questions
1. I guess the main question is, what am I doing wrong. I am very new to this and am trying to just get this stand alone application to work so that I can expand it for real world use.
2. Am I missing some other configuration other than the persistence.xml file?
3. What is the simplest way of getting around this error for a stand-alone app?

Many thanks in advance!

Answer 1

I see you have main class, therefore I assume you are using it in Java SE environment. The easiest way to make it work is to define -javaagent in command line, like this:

java -jar myJAR.jar -javaagent:openjpa-all-2.3.0.jar

It is also possible from Eclipse: Run->Run Configurations->find your application in "Java Applications"->Arguments->VM arguments->add

-javaagent:/full/path/to/openjpa-all-2.3.0.jar