hibernate - HSQLDB 和 Hibernate : Unit Test raises org. hsqldb.HsqlException: 用户缺少权限或找不到对象

Question

我正在尝试使用 Hibernate 和 HSQLDB。我试图将教程改编为更当前的版本，所以可能存在问题。当我使用 JUnit 运行单元测试时会发生这种情况。

我将 HSQLDB 2.3.2 与 Hibernate (JPA) 4.3.5 一起使用。

我得到的错误是这样的:

16:40:16,802 DEBUG SQL:109 - select device0_.DEVICE_ID as DEVICE_I1_0_, device0_.DEVICE_FIRMWARE_VERSION as DEVICE_F2_0_, device0_.DEVICE_IMAGE as DEVICE_I3_0_ from DEVICES device0_ limit ? 16:40:16,802 DEBUG SQL:109 - select device0_.DEVICE_ID as DEVICE_I1_0_, device0_.DEVICE_FIRMWARE_VERSION as DEVICE_F2_0_, device0_.DEVICE_IMAGE as DEVICE_I3_0_ from DEVICES device0_ limit ? 16:40:16,802 DEBUG SQL:109 - select device0_.DEVICE_ID as DEVICE_I1_0_, device0_.DEVICE_FIRMWARE_VERSION as DEVICE_F2_0_, device0_.DEVICE_IMAGE as DEVICE_I3_0_ from DEVICES device0_ limit ? 16:40:16,803 WARN SqlExceptionHelper:144 - SQL Error: -5501, SQLState: 42501 16:40:16,803 WARN SqlExceptionHelper:144 - SQL Error: -5501, SQLState: 42501 16:40:16,803 ERROR SqlExceptionHelper:146 - user lacks privilege or object not found: DEVICES 16:40:16,803 ERROR SqlExceptionHelper:146 - user lacks privilege or object not found: DEVICES 16:40:16,804 ERROR gwt-log:81 - e: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not prepare statement javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not prepare statement ... Caused by: org.hibernate.exception.SQLGrammarException: could not prepare statement ... Caused by: java.sql.SQLSyntaxErrorException: user lacks privilege or object not found: DEVICES ... Caused by: org.hsqldb.HsqlException: user lacks privilege or object not found: DEVICES ...

我的persistence.xml 看起来像这样:

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
             http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
             version="2.0">

  <persistence-unit name="testproject" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>


    <class>testproject.server.domain.Device</class>

    <exclude-unlisted-classes/>

    <properties>

      <!-- Database connection settings -->
      <property name="hibernate.connection.driver_class" value="org.hsqldb.jdbcDriver" />
      <property name="hibernate.connection.url" value="jdbc:hsqldb:file:/db/testdb" />
      <property name="hibernate.connection.username" value="sa" />
      <property name="hibernate.connection.password" value="" />

      <!-- JDBC connection pool (use the built-in) -->
      <property name="connection.pool_size" value="1" />

      <!-- SQL dialect -->
      <property name="hibernate.dialect" value="org.hibernate.dialect.HSQLDialect" />

      <!-- Enable Hibernate's automatic session context management -->
      <property name="current_session_context_class" value="thread" />

      <!-- Disable the second-level cache  -->
      <property name="cache.provider_class" value="org.hibernate.cache.NoCacheProvider" />

      <!-- Echo all executed SQL to stdout -->
      <!-- <property name="hibernate.show_sql" value="true" /> -->
      <!-- <property name="hibernate.format_sql" value="true" /> -->

      <!-- Drop and re-create the database schema on startup -->
      <!-- This property should not be set in PRODUCTION environments -->
      <!-- <property name="hibernate.hbm2ddl.auto" value="create" /> -->

      <property name="hibernate.c3p0.min_size" value="5" />
      <property name="hibernate.c3p0.max_size" value="20" />
      <property name="hibernate.c3p0.timeout" value="300" />
      <property name="hibernate.c3p0.max_statements" value="50" />
      <property name="hibernate.c3p0.idle_test_period" value="3000" />
    </properties>

  </persistence-unit>
</persistence> 

我的 Device.java 看起来像这样:

package testproject.server.domain;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

import testproject.shared.dto.DeviceDto;

@Entity
@Table(name = "DEVICES")
public class Device implements Serializable {

    private static final long serialVersionUID = 8161681740825989132L;

    @Id
    @Column(name = "DEVICE_ID")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    protected Long deviceId;

    @Column(name = "DEVICE_IMAGE")
    protected String image;

    @Column(name = "DEVICE_FIRMWARE_VERSION")
    protected String firmwareVersion;

    public Device() {
    }

    public Device(Long deviceId) {
        setDeviceId(deviceId);
    }

    public Device(DeviceDto device) {
        setDeviceId(device.getDeviceId());
        setImage(device.getImage());
        setFirmwareVersion(device.getFirmwareVersion());
    }

    public Long getDeviceId() {
        return deviceId;
    }

    public void setDeviceId(Long deviceId) {
        this.deviceId = deviceId;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public String getFirmwareVersion() {
        return firmwareVersion;
    }

    public void setFirmwareVersion(String firmwareVersion) {
        this.firmwareVersion = firmwareVersion;
    }

    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("Device Id: ").append(getDeviceId()).append(", ");
        sb.append("Image: ").append(getImage()).append(", ");
        sb.append("Firmware Version: ").append(getFirmwareVersion());

        return sb.toString();
    }

    //TODO: Do we need that?
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result
                + ((deviceId == null) ? 0 : deviceId.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (!(obj instanceof Device))
            return false;
        Device other = (Device) obj;
        if (deviceId == null) {
            if (other.deviceId != null)
                return false;
        } else if (!deviceId.equals(other.deviceId))
            return false;
        return true;
    }
}

而我的道是这样的:

package testproject.server.dao;

import java.util.List;

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

import testproject.server.domain.Device;

public class DeviceDao extends BaseDao {

      private static final EntityManagerFactory entityManagerFactory =
          Persistence.createEntityManagerFactory("testproject");

      public static EntityManager createEntityManager() {
        return entityManagerFactory.createEntityManager();
      }

    public Long createObject(Object object) {
        return createDevice((Device) object);
    }

    public List<Object> retrieveObjects(int maxResults, int firstResult) {

        EntityManager em = createEntityManager();
        List<Object> list = null;

        try {
            TypedQuery<Object> query = em.createQuery(
                    "select a from Device a", Object.class);
            query.setMaxResults(maxResults);
            query.setFirstResult(firstResult);
            list = query.getResultList();
        } finally {
            em.close();
        }

        return list;
    }

    public Long createDevice(Device Device) {

        // For an application-managed entity manager its best practice to create
        // a
        // new entity manager inside a method and close it before the method is
        // finished.

        EntityManager em = createEntityManager();
        EntityTransaction tx = em.getTransaction();
        Long DeviceId = -1L;

        try {
            tx.begin();
            em.persist(Device);
            DeviceId = Device.getDeviceId();
            tx.commit();
        } catch (Throwable t) {
            t.printStackTrace();
            tx.rollback();
        } finally {
            em.close();
        }

        return DeviceId;
    }

    public Device retrieveDevice(Long DeviceId) {

        EntityManager em = createEntityManager();
        Device Device = null;

        try {
            TypedQuery<Device> query = em.createQuery(
                    "select a from Device a where a.DeviceId = ?1",
                    Device.class);
            query.setParameter(1, DeviceId);
            Device = query.getSingleResult();
        } finally {
            em.close();
        }

        return Device;
    }

    public List<Device> retrieveDevices(int maxResults, int firstResult) {

        EntityManager em = createEntityManager();
        List<Device> list = null;

        try {
            TypedQuery<Device> query = em.createQuery(
                    "select a from Device a", Device.class);
            query.setMaxResults(maxResults);
            query.setFirstResult(firstResult);
            list = query.getResultList();
        } finally {
            em.close();
        }

        return list;
    }

    public Device updateDevice(Device Device) {

        EntityManager em = createEntityManager();
        EntityTransaction tx = em.getTransaction();
        Device Device2 = null;

        try {
            tx.begin();
            Device2 = em.merge(Device);
            tx.commit();
        } catch (Throwable t) {
            t.printStackTrace();
            tx.rollback();
        } finally {
            em.close();
        }

        return Device2;
    }

    public void deleteDevice(Device Device) {

        EntityManager em = createEntityManager();
        EntityTransaction tx = em.getTransaction();

        try {
            tx.begin();
            em.remove(em.merge(Device));
            tx.commit();
        } catch (Throwable t) {
            t.printStackTrace();
            tx.rollback();
        } finally {
            em.close();
        }
    }
}

最后，我的测试用例(它很糟糕，我只想看到它运行):

package testproject.server;

import java.util.List;

import org.apache.log4j.xml.DOMConfigurator;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.allen_sauer.gwt.log.client.Log;

import testproject.server.dao.DeviceDao;
import testproject.server.domain.Device;

public class DeviceTestCase {

  private long startTimeMillis;

  @Before
  public void setUp() {

    // The log4j configuration file must be in the Project's root directory
    DOMConfigurator.configure("log4j.xml");

    startTimeMillis = System.currentTimeMillis();
  }

  @Test
  public void testDeviceDao() {
    try {
      Log.debug("testDeviceDao()");

      createDevices();

    }
    catch (Exception e) {
      Log.error("e: " + e);
      e.printStackTrace();
    }
  }

  public void createDevice() {

    Device d1 = new Device();
    d1.setFirmwareVersion("Firmware1");
    d1.setImage("Image1");

    DeviceDao deviceDao = new DeviceDao();
    deviceDao.createDevice(d1);
  }

  public void createDevices() {

    Device d1 = new Device();
    d1.setFirmwareVersion("Firmware1");
    d1.setImage("Image1");

    Device d2 = new Device();
    d1.setFirmwareVersion("Firmware2");
    d1.setImage("Image2");

    Device d3 = new Device();
    d1.setFirmwareVersion("Firmware3");
    d1.setImage("Image3");

    DeviceDao deviceDao = new DeviceDao();

    deviceDao.createDevice(d1);
    deviceDao.createDevice(d2);
    deviceDao.createDevice(d3);

    List<Device> devices = deviceDao.retrieveDevices(100, 0);

    for (Device device : devices) {
      Log.debug(device.toString());
    }
    //TODO: Btw, this is not a really good test case ;)
  }

  @After
  public void tearDown() {
    long endTimeMillis = System.currentTimeMillis();
    float durationSeconds = (endTimeMillis - startTimeMillis) / 1000F;
    Log.debug("Duration: " + durationSeconds + " seconds");
  }
}

如果有人对如何解决这个问题有建议，我会很高兴，因为我现在真的被卡住了。

Answer 1

您收到的消息是 HSQLDB 有点神秘的方式，它告诉您您尝试从中选择的 DEVICES 表不存在(或者您正在连接的用户无权访问该表)。创造它。