<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="2.0">
<persistence-unit name="primary">
    <jta-data-source>java:jboss/dataDS</jta-data-source>
    <properties>
        <property name="hibernate.hbm2ddl.auto" value="update"/>
        <property name="hibernate.show_sql" value="false"/>
        <property name="hibernate.format_sql" value="false"/>
    </properties>
</persistence-unit>
</persistence>

<?xml version="1.0"?>
<datasources xmlns="http://www.jboss.org/ironjacamar/schema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<datasource jndi-name="java:jboss/dataDS" pool-name="PostgreSQLPool">
    <connection-url>jdbc:postgresql://localhost:5432/itsfortest</connection-url>
    <driver>postgresql-42.2.1.jar</driver>
    <driver-class>org.postgresql.Driver</driver-class>
    <pool>
        <max-pool-size>30</max-pool-size>
    </pool>
    <security>
        <user-name>admin</user-name>
        <password></password>
    </security>
</datasource>
</datasources>

@Entity

@Id @GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String name;
private int price;

@OneToMany(mappedBy = "goodsEntity")
private List<GoodsInOrderEntity> goodsInOrderEntity;

public List<GoodsInOrderEntity> getGoodsInOrderEntity() {
    return goodsInOrderEntity;
}

public void setGoodsInOrderEntity(List<GoodsInOrderEntity> goodsInOrderEntity) {
    this.goodsInOrderEntity = goodsInOrderEntity;
}

public long getId() {
    return id;
}

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

public String getName() {
    return name;
}

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

public int getPrice() {
    return price;
}

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

@Id
private long id;

@ManyToOne
private GoodsEntity goodsEntity;

@ManyToOne
private OrderEntity orderEntity;

public long getId() {
    return id;
}

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

public GoodsEntity getGoodsEntity() {
    return goodsEntity;
}

public void setGoodsEntity(GoodsEntity goodsEntity) {
    this.goodsEntity = goodsEntity;
}

public OrderEntity getOrderEntity() {
    return orderEntity;
}

public void setOrderEntity(OrderEntity orderEntity) {
    this.orderEntity = orderEntity;
}

@Entity

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private int summaryPrice;

@OneToMany(mappedBy = "orderEntity")
private List<GoodsInOrderEntity> goodsInOrderEntity;

public List<GoodsInOrderEntity> getGoodsInOrderEntity() {
    return goodsInOrderEntity;
}

public void setGoodsInOrderEntity(List<GoodsInOrderEntity> goodsInOrderEntity) {
    this.goodsInOrderEntity = goodsInOrderEntity;
}

public long getId() {
    return id;
}

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

public int getSummaryPrice() {
    return summaryPrice;
}

public void setSummaryPrice(int summaryPrice) {
    this.summaryPrice = summaryPrice;
}

@Stateless

@PersistenceContext(unitName = "primary")
private
EntityManager entityManager;

public GoodsEntity creatingThing(String name, int price){
    GoodsEntity goodsEntity = entityManager.find(GoodsEntity.class, name);

    goodsEntity.setName(name);
    goodsEntity.setPrice(price);
    entityManager.persist(goodsEntity);

    return goodsEntity;
}


public List<GoodsEntity> getGoods(){
    TypedQuery<GoodsEntity> query = entityManager.createQuery("SELECT c FROM GoodsEntity c", GoodsEntity.class);
    return query.getResultList();
}

@Stateless

@PersistenceContext(unitName = "primary")
EntityManager entityManager;


public OrderEntity creatingOrder(){
    OrderEntity orderEntity = new OrderEntity();

    entityManager.persist(orderEntity);
    return  orderEntity;
}

public boolean addingToOrder(long orderId, long thingId){

    OrderEntity orderEntity = entityManager.find(OrderEntity.class, orderId);
    GoodsEntity goodsEntity = entityManager.find(GoodsEntity.class, thingId);

    if (orderEntity==null||goodsEntity==null){
        return false;
    }

    GoodsInOrderEntity goodsInOrderEntity = new GoodsInOrderEntity();
    goodsInOrderEntity.setOrderEntity(orderEntity);
    goodsInOrderEntity.setGoodsEntity(goodsEntity);

    entityManager.persist(goodsInOrderEntity);

    return true;
}

public List<GoodsEntity> getGoodsInOrder(long orderId){
    OrderEntity orderEntity = entityManager.find(OrderEntity.class, orderId);

    if(orderEntity==null){
        return Collections.emptyList();
    }

    List <GoodsInOrderEntity> goodsInOrderEntity = orderEntity.getGoodsInOrderEntity();
    List<GoodsEntity> result = new ArrayList<>();
    for (GoodsInOrderEntity goods :
            goodsInOrderEntity) {
        result.add(goods.getGoodsEntity());
    }
    return result;
}

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
  xmlns:h="http://xmlns.jcp.org/jsf/html"
  xmlns:ui="http://xmlns.jcp.org/jsf/facelets"
  xmlns:f="http://xmlns.jcp.org/jsf/core">
<h:head>Shop</h:head>
<h:body>

<h:form>
<table>
    <tr>
        <td><h:inputText value="#{managingGoodsCDI.name}"/></td>
        <td><h:inputText value="#{managingGoodsCDI.price}"/></td>
    </tr>
    <tr>
        <td>
            Наименование
        </td>
        <td>
            Цена
        </td>
        </tr>
        <tr>
            <td>
                <h:commandButton value="Создать товар" action="#{managingGoodsCDI.createThing}"/>
            </td>
            <td>
                <h:commandButton value="Создать заказ" action="#{managingGoodsCDI.createOrder}"/>
            </td>
    </tr>
</table>
Созданные товары
<h:dataTable value="#{managingGoodsCDI.goods}" var="Thing">
<h:column>
    <h:outputText value="#{Thing.name}"/>
</h:column>
<h:column>
    <h:outputText value="#{Thing.price}"/>
</h:column>
<h:column>
    <h:commandButton value="Добавить" action="#
{managingGoodsCDI.addingToOrder(Thing)}"/>
</h:column>
</h:dataTable>
Добавленные товары

<h:dataTable value="#{managingGoodsCDI.goodsInOrder}" var="Thing">
<h:column>
<h:outputText value="#{Thing.name}"/>
</h:column>
<h:column>
<h:outputText value="#{Thing.price}"/>
</h:column>
</h:dataTable>
</h:form>
</h:body>
</html>