craigew

<plugin>
                <groupId>org.apache.openjpa</groupId>
                <artifactId>openjpa-maven-plugin</artifactId>
                <version>2.2.0</version>
                <configuration>
                    <includes>**/entities/*.class</includes>
                    <excludes>**/entities/XML*.class</excludes>
                    <addDefaultConstructor>true</addDefaultConstructor>
                    <enforcePropertyRestrictions>true</enforcePropertyRestrictions>
                </configuration>

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        <dependency>
            <groupId>org.apache.openjpa</groupId>
            <artifactId>openjpa-all</artifactId>
            <version>2.1.1</version>
        </dependency>

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    <profiles>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <build>
                <plugins>
                    <plugin>
                        <groupId>org.liquibase</groupId>

craigew

public class TestClientManagement {

    @Test
    public void should_persist_a_customer() {
        Customer customer = new Customer("John", "Doe", "123456", 36);
        long id=new CustomerManagementService().createCustomer(customer);
        Assert.assertEquals("Id is not was expected",5,id);
    }

    @Test

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@Entity
public class Customer extends BaseEntity{
    private String name;
    private String surname;
    private String identity_number;
    private int age;

    public Customer(String name, String surname, String identity_number, int age) {
        this.name = name;
        this.surname = surname;

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@MappedSuperclass
public class BaseEntity implements Identifier{

    @Id
    @GeneratedValue(strategy= GenerationType.SEQUENCE, generator="id_sequence_gen")
    @SequenceGenerator(name="id_sequence_gen", sequenceName="id_sequence")
    private long id;


    public long getId() {

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<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             version="1.0">
    <persistence-unit name="JPAIntroduction" transaction-type="RESOURCE_LOCAL">
        <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
        <class>com.craigew.entity.Customer</class>
        <class>com.craigew.entity.BaseEntity</class>
        <properties>
            <property name="openjpa.ConnectionURL" value="jdbc:oracle:thin:@192.168.0.9:1521/xe"/>
            <property name="openjpa.ConnectionDriverName" value="oracle.jdbc.driver.OracleDriver"/>
            <property name="openjpa.ConnectionUserName" value="dev"/>

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public class DataAccess<T extends BaseEntity> {
    private Class<T> entityClass;

    protected long add(T object){
        EntityManagerFactory factory = Persistence.createEntityManagerFactory("JPAIntroduction");
        EntityManager em = factory.createEntityManager();
        em.getTransaction().begin();
        em.persist(object);
        em.getTransaction().commit();
        long id=object.getId();

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public class CustomerManagementService extends DataAccess<Customer> {

    public long createCustomer(Customer customer) {
        return add(customer);
    }

    public boolean updateCustomer(Customer customer) {
        update(customer);
        return true;
    }

craigew

package com.craigew.entity;

import javax.persistence.Entity;

@Entity
public class Address extends BaseEntity{
    private String addressLine1;
    private String addressLine2;
    private String suburb;
    private String postalCode;