Why is JPA crashing?

Question

Java

Hello. Please tell me how to fix the crash of the following exceptions in JPA:

34  WARN   [main] openjpa.Runtime - The configuration property named "openjpa.Id" was not recognized and will be ignored, although the name closely matches a valid property called "openjpa.Id".
449  INFO   [main] openjpa.Runtime - OpenJPA dynamically loaded the class enhancer. Any classes that were not enhanced at build time will be enhanced when they are loaded by the JVM.
521  INFO   [main] openjpa.Runtime - Starting OpenJPA 2.0.1
Exception in thread "main" <openjpa-2.0.1-r422266:989424 fatal user error> org.apache.openjpa.persistence.ArgumentException: A JDBC Driver or DataSource class name must be specified in the ConnectionDriverName property.
  at org.apache.openjpa.jdbc.schema.DataSourceFactory.newDataSource(DataSourceFactory.java:76)
  at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.createConnectionFactory(JDBCConfigurationImpl.java:839)
  at org.apache.openjpa.jdbc.conf.JDBCConfigurationImpl.getDBDictionaryInstance(JDBCConfigurationImpl.java:597)
  at org.apache.openjpa.jdbc.meta.MappingRepository.endConfiguration(MappingRepository.java:1489)
  at org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:507)
  at org.apache.openjpa.lib.conf.Configurations.configureInstance(Configurations.java:432)
  at org.apache.openjpa.lib.conf.PluginValue.instantiate(PluginValue.java:104)
  at org.apache.openjpa.conf.MetaDataRepositoryValue.instantiate(MetaDataRepositoryValue.java:68)
  at org.apache.openjpa.lib.conf.ObjectValue.instantiate(ObjectValue.java:83)
  at org.apache.openjpa.conf.OpenJPAConfigurationImpl.newMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:939)
  at org.apache.openjpa.conf.OpenJPAConfigurationImpl.getMetaDataRepositoryInstance(OpenJPAConfigurationImpl.java:930)
  at org.apache.openjpa.kernel.AbstractBrokerFactory.makeReadOnly(AbstractBrokerFactory.java:639)
  at org.apache.openjpa.kernel.AbstractBrokerFactory.newBroker(AbstractBrokerFactory.java:206)
  at org.apache.openjpa.kernel.DelegatingBrokerFactory.newBroker(DelegatingBrokerFactory.java:156)
  at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:227)
  at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:154)
  at org.apache.openjpa.persistence.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:60)
  at test.FindTariffOption.main(FindTariffOption.java:16)
  at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  at java.lang.reflect.Method.invoke(Method.java:498)
  at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Process finished with exit code 1

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;

public class FindTariffOption {

    public static void main(String[] args) {
        EntityManagerFactory emfactory = Persistence.createEntityManagerFactory("jpa");
        EntityManager entitymanager = emfactory.createEntityManager();
        TariffOptionEntity tariffOptionEntity = new TariffOptionEntity("new", 100.0, 150.0);

    }
}

package test;

import javax.persistence.*;

@Entity
@Table(name = "TariffOption", schema = "test", catalog = "")
public class TariffOptionEntity {
    private int id;
    private String title;
    private Double price;
    private Double connectionPrice;

    public TariffOptionEntity() {
    }

    @Id
    @Column(name = "id")
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public TariffOptionEntity(String title, Double price, Double connectionPrice) {
        this.title = title;
        this.price = price;
        this.connectionPrice = connectionPrice;
    }

    @Basic
    @Column(name = "title")
    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    @Basic
    @Column(name = "price")
    public Double getPrice() {
        return price;
    }

    public void setPrice(Double price) {
        this.price = price;
    }

    @Basic
    @Column(name = "connectionPrice")
    public Double getConnectionPrice() {
        return connectionPrice;
    }

    public void setConnectionPrice(Double connectionPrice) {
        this.connectionPrice = connectionPrice;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        TariffOptionEntity that = (TariffOptionEntity) o;

        if (id != that.id) return false;
        if (title != null ? !title.equals(that.title) : that.title != null) return false;
        if (price != null ? !price.equals(that.price) : that.price != null) return false;
        if (connectionPrice != null ? !connectionPrice.equals(that.connectionPrice) : that.connectionPrice != null)
            return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = id;
        result = 31 * result + (title != null ? title.hashCode() : 0);
        result = 31 * result + (price != null ? price.hashCode() : 0);
        result = 31 * result + (connectionPrice != null ? connectionPrice.hashCode() : 0);
        return result;
    }
}

Answer 1

Have you defined the settings in the persistence.xml file ?

<?xml version="1.0"?>
<persistence version="1.0">
  <persistence-unit name="openjpa">
    <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
    <class>tutorial.Animal</class>
    <class>tutorial.Dog</class>
    <class>tutorial.Rabbit</class>
    <class>tutorial.Snake</class>
    <properties>
      <property name="openjpa.ConnectionURL" value="jdbc:hsqldb:tutorial_database"/>
      <property name="openjpa.ConnectionDriverName" value="org.hsqldb.jdbcDriver"/>
      <property name="openjpa.ConnectionUserName" value="sa"/>
      <property name="openjpa.ConnectionPassword" value=""/>
      <property name="openjpa.Log" value="DefaultLevel=WARN, Tool=INFO"/>
    </properties>
  </persistence-unit>
</persistence>