Spring, Hibernate и JPA: вызов сохраняется в entitymanager, похоже, не фиксируется в базе данных

Я пытаюсь настроить Spring с помощью Hibernate и JPA, но при попытке сохранить объект в базу данных ничего не добавляется.

Я использую следующее:

<bean id = "dataSource" class = "org.apache.commons.dbcp.BasicDataSource">
    <property name = "url" value = "${jdbc.url}"/>
    <property name = "driverClassName" value = "${jdbc.driverClassName}"/>
    <property name = "username" value = "${jdbc.username}"/>
    <property name = "password" value = "${jdbc.password}"/>
</bean>

<bean id = "entityManagerFactory" class = "org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name = "dataSource" ref = "dataSource" />
    <property name = "persistenceUnitName" value = "BankingWeb" />
    <property name = "jpaVendorAdapter">
        <bean class = "org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name = "generateDdl" value = "true" />
            <property name = "showSql" value = "true" />
            <property name = "databasePlatform" value = "${hibernate.dialect}" />
        </bean>
    </property>
</bean>

<tx:annotation-driven/>

<bean id = "transactionManager" class = "org.springframework.orm.jpa.JpaTransactionManager">
    <property name = "entityManagerFactory" ref = "entityManagerFactory"/>
</bean>

<bean class = "org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />

<bean class = "org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>

<bean name = "accountManager" class = "ssel.banking.dao.jpa.AccountManager" />
<bean name = "userManager" class = "ssel.banking.dao.jpa.UserManager" />

А в AccountManager я делаю:

@Repository
public class AccountManager implements IAccountManager {

    @PersistenceContext private EntityManager em;

    /* -- 8< -- Query methods omitted -- 8< -- */

    public Account storeAccount(Account ac) {
    ac = em.merge(ac);
        em.persist(ac);
        return ac;
    }
}

Откуда берется ac:

    Account ac = new Account();
    ac.setId(mostRecent.getId()+1);
    ac.setUser(user);
    ac.setName(accName);
    ac.setDate(new Date());
    ac.setValue(0);
    ac = accountManager.storeAccount(ac);
    return ac;

Есть ли кто-нибудь, кто может указать на то, что я делаю не так? Вызов persist возвращается без исключения исключений. Если после этого я сделаю em.contains(ac), это вернет истину.

Если кому-то понадобится, вот как определяется Account:

@SuppressWarnings("serial")
@Entity
@NamedQueries({
        @NamedQuery(name = "Account.AllAccounts", query = "SELECT a FROM Account a"),
        @NamedQuery(name = "Account.Accounts4User", query = "SELECT a FROM Account a WHERE user=:user"), 
        @NamedQuery(name = "Account.Account4Name", query = "SELECT a FROM Account a WHERE name=:name"),
        @NamedQuery(name = "Account.MaxId", query = "SELECT MAX(a.id) FROM Account a"),
        @NamedQuery(name = "Account.Account4Id", query = "SELECT a FROM Account a WHERE id=:id"),
    })
public class Account extends AbstractNamedDomain {
    @Temporal(TemporalType.DATE)
    @Column(name = "xdate")
    private Date date;

    private double value;

    @ManyToOne(cascade = {CascadeType.PERSIST, CascadeType.MERGE})
    @JoinColumn(name = "userid")
    private User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    @OneToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE}, fetch=FetchType.EAGER)
    @OrderBy("date")
    private List<AccountActivity> accountActivity = new ArrayList<AccountActivity>();

    public List<AccountActivity> getAccountActivity() {
        return accountActivity;
    }

    public void setAccountActivity(List<AccountActivity> accountActivity) {
        this.accountActivity = accountActivity;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public double getValue() {
        return value;
    }

    public void setValue(double value) {
        this.value = value;
    }

    public void addAccountActivity(AccountActivity activity) {
        // Make sure ordering is maintained, JPA only does this on loading
        int i = 0;
        while (i < getAccountActivity().size()) {
            if (getAccountActivity().get(i).getDate().compareTo(activity.getDate()) <= 0)
                break;
            i++;
        }
        getAccountActivity().add(i, activity);
    }
}

@MappedSuperclass public abstract class AbstractNamedDomain extends AbstractDomain {

    private String name;

    public AbstractNamedDomain() {

    }

    public AbstractNamedDomain(String name) {

        this.name = name;
    }

    public String getName() {
        return name;
    }

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

@MappedSuperclass public abstract class AbstractDomain implements Serializable {

    @Id @GeneratedValue
    private long id = NEW_ID;

    public static long NEW_ID = -1;

    public long getId() {
        return id;
    }

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

    public boolean isNew() {

        return id==NEW_ID;
    }
}