那些遇到过的问题

运行JUnit测试的错误(JPA,Derby,Hibernate,Guice)

scu*_*dev 0 java unit-testing jpa derby guice

我正在尝试为我的DAO对象创建一个JUnit测试.JUnit直接从Netbeans运行.我对其中的几种技术都很陌生,因此我有一段时间可以追踪我的错误来自何处.我的代码和我看到的相应错误是:

2011年7月22日下午7:09:09 com.sun.enterprise.v3.server.CommonClassLoaderServiceImpl findDerbyClient INFO:找不到javadb客户端jar文件,默认情况下derby jdbc驱动程序不可用.FATAL [DatasourceConnectionProvider] - 无法找到数据源:Waylon org.omg.CORBA.COMM_FAILURE:FINE:IOP00410001:连接失败:socketType:IIOP_CLEAR_TEXT; hostname:localhost; port:3700 vmcid:OMG次代码:1完成:没有javax.naming.NamingException:在SerialContext中查找'Waylon'失败[myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory ,java.naming.factory.url.pkgs = com.sun.enterprise.naming,java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [root异常是javax.naming .NamingException:无法为SerialContext获取SerialContextProvider [myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory,java.naming.factory.url.pkgs = com.sun.enterprise.naming ,java.naming.factory.state = com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [根异常是org.omg.CORBA.COMM_FAILURE:FINE:IOP00410001:连接失败:socketType:IIOP_CLEAR_TEXT; hostname:localhost; 端口:3700 vmcid:OMG次要代码:1完成:否]]在sun.sref.enterEv. .reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)在com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)在java.lang.reflect.Constructor.newInstance(Constructor.java:513 )在com.sun.corba的com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:248)的javax.naming.InitialContext.lookup(InitialContext.java:392)中. ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:95)位于com.sun.corba.ee.spi.orbutil的org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52). org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(Connec)中的logex.WrapperGenerator.handleFullLogging(WrapperGenerator.java:387)tionProviderFactory.java:124)在com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.access $ 400(WrapperGenerator.java:107)在org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29)在com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator $ 2.invoke(WrapperGenerator.java:511)位于com.sun.corba.ee的org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)位于org.hibernate.cfg的$ Proxy40.connectFailure(未知来源)的org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)中的.spi.orbutil.proxy.CompositeInvocationHandlerImpl.invoke(CompositeInvocationHandlerImpl.java:99).位于org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)的com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.(SocketOrChannelConnectionImpl.java:257)中的Configuration.buildSessionFactory(Configuration.java:1292)at com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.(SocketOrChannelConnec tionImpl.java:270)at com.unernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)at com.sun.corba.ee.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:129)at com.sun位于com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl的org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)上的.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:223) .request(CorbaClientDelegateImpl.java:228)位于org.omg.CORBA的com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.is_a(CorbaClientDelegateImpl.java:393)的javax.persistence.Persistence.createEntityManagerFactory(未知来源) .portable.ObjectImpl._is_a(ObjectImpl.java:112)位于com.google.inject.persist的org.omg.CosNaming.NamingContextHelper.narrow(NamingContextHelper.java:69)的javax.persistence.Persistence.createEntityManagerFactory(未知来源) .jpa.JpaPersistService.在com.sun.enterprise.naming.impl.SerialContext $ ProviderCacheKey.getNameService(SerialContext.java:1241)的com.sun.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36)的com.sun开始(JpaPersistService.java:94) .enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:411)在com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:347)在sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法) at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:504)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at com.sun.enterprise.naming.impl.SerialContext.lookup (SerialContext.java:455)在sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)在javax.naming.InitialContext.lookup(InitialContext.java:392)在java.lang.reflect.Method.invoke(方法. java:597)org.juni上的org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52)位于org.junit.internal.runners.model.ReflectiveCallable.run的org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)中的t.runners.model.FrameworkMethod $ 1.runReflectiveCall(FrameworkMethod.java:44)(ReflectiveCallable)的.java:15)在在org.junit.runners.model.FrameworkMethod org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29)在org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62).在org.hibernate的org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)的org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)中调用了爆炸性的(FrameworkMethod.java:41) .cfg.Configuration.buildSessionFactory(Configuration.java:1292)在org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)在org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859 )org.junit.runners.ParentRunner.run(父 Runner.java:303)org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)位于org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence)的junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39) .java:126)org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)at org.apache.tools.ant的javax.persistence.Persistence.createEntityManagerFactory(未知来源) .taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052)位于org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:906)的javax.persistence.Persistence.createEntityManagerFactory (未知来源)at com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)at waylon.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36)引起:javax.naming.NamingException:Unable获取SerialContext的SerialContextProvider [myEnv = {java.naming.factory.initial = com.sun.enterprise.naming.impl.SerialInitContextFactory,java.naming.factory.url.pkgs = com.sun.enterprise.naming,java.naming.factory.state = com.sun.corba.ee.impl.presentation .rmi.JNDIStateFactoryImpl} [根异常是org.omg.CORBA.COMM_FAILURE:FINE:IOP00410001:连接失败:socketType:IIOP_CLEAR_TEXT; hostname:localhost; port:3700 vmcid:OMG次要代码:1完成:否]在sun.sref.enterprise.namingvider(SerialContext.java:352)的sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method).在com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:504)中的reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)... 29还有sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java) :25)

persistence.xml中

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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">
  <persistence-unit name="WaylonPU" transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
    <jta-data-source>Waylon</jta-data-source>
    <class>waylon.label.Label</class>
    <exclude-unlisted-classes>true</exclude-unlisted-classes>
    <properties>
      <property name="hibernate.dialect" value="org.hibernate.dialect.DerbyDialect"/>
      <property name="hibernate.hbm2ddl.auto" value="create-drop"/>
    </properties>
  </persistence-unit>
</persistence>
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我的DAO正在测试中:

package waylon.label.impl;

import com.google.inject.Inject;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.TypedQuery;
import waylon.label.Label;
import waylon.label.LabelDAO;

/**
 * {@inheritDoc}
 */
public class LabelDAOImpl implements LabelDAO {

    private final EntityManager em;

    @Inject
    public LabelDAOImpl( EntityManager em ) {
        this.em = em;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public List<Label> getAllLabels() throws Exception {
        TypedQuery<Label> typedQuery = em.createQuery(
                "SELECT * from LABEL", Label.class );
        return typedQuery.getResultList();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public Label createLabel(String name) throws Exception {
        em.getTransaction().begin();
        Label label = new Label();
        label.setName( name );
        em.persist( label );
        em.getTransaction().commit();
        return label;
    }

    /**
     * {@inheritDoc}
     */    
    @Override
    public void removeLabel(String name) throws Exception {
        Label label = getLabel( name );
        removeLabel( label );
    }

    /**
     * {@inheritDoc}
     */    
    @Override
    public Label getLabel(String name) throws Exception {
        Label label = em.find( Label.class, name );
        return label;
    }

    /**
     * {@inheritDoc}
     */    
    @Override
    public void removeLabel(Label label) throws Exception {
        if ( null != label ) {
            em.getTransaction().begin();
            em.remove( label );
            em.getTransaction().commit();
        }
    }
}
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我的JUnit测试:

package waylon.label;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.persist.PersistService;
import com.google.inject.persist.jpa.JpaPersistModule;
import java.util.List;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;
import org.hamcrest.core.IsEqual;
import org.junit.AfterClass;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import waylon.label.impl.LabelDAOModule;

/**
 * A JUnit Test to test our database connection and JPA code.
 * @author Benjamin Bays
 */
public class LabelDAOIJTest {

    private LabelDAO objectInTest = null;

    private static final String PUNIT = "WaylonPU";
    private static Injector injector = null;
    private static PersistService persistService = null;

    @BeforeClass
    public static void setUpClass() throws Exception {
        injector = Guice.createInjector( 
                new JpaPersistModule(PUNIT),
                new LabelDAOModule() );
        persistService = injector.getInstance( PersistService.class );
        persistService.start();
    }

    @AfterClass
    public static void tearDownClass() throws Exception {
        persistService.stop();
    }

    @Before
    public void setUp() {
        objectInTest = injector.getInstance( LabelDAO.class );
    }

    @Test
    public void doEverything() throws Exception {
        final String testName = "Test Label";
        Label label1 = objectInTest.createLabel( testName );
        assertThat( label1.getName(), IsEqual.equalTo( testName ) );

        Label label2 = objectInTest.getLabel(testName);
        assertThat( label2.getName(), IsEqual.equalTo( testName ) );

        final String testName3 = "Test Label3";
        Label label3 = objectInTest.createLabel( testName3 );
        assertThat( label3.getName(), IsEqual.equalTo( testName3 ) );        

        List<Label> allLabels = objectInTest.getAllLabels();
        assertThat( allLabels, hasItems( label1, label3 ) );

        objectInTest.removeLabel( label1 );
        objectInTest.removeLabel( testName3 );
        List<Label> noLabels = objectInTest.getAllLabels();
        assertThat( noLabels.size(), IsEqual.equalTo( 0 ) );
    }
}
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任何帮助将不胜感激.谢谢.

scu*_*dev 5

这花了很长时间才弄明白.我认为这里的总体教训是一次只学习一种新技术.我已经提供了一系列步骤来让我的JUnits运行,但总的来说,这是由RTFM解决的几个错误.

为了给予应有的信用,这些资源得到了极大的帮助.

  1. http://blogs.oracle.com/geertjan/entry/embedded_database_for_netbeans_platform
  2. http://platform.netbeans.org/tutorials/nbm-crud.html
  3. Eclipslink - 未知的实体类型

我首先使用第一个资源重新创建数据库服务.这涉及重新创建每个表并重新建立外键依赖项(烦人但必要).

然后我按照第二个教程让netbeans从我的数据库表中自动生成一个Entity.我的实体不需要更改,但这确实导致Netbeans生成persistence.xml.我将它与我自己进行了比较,并提出了这个部分:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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">
  <persistence-unit name="LabelDAOIJTest" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>waylon.label.Label</class>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby:Waylon;create=true"/>
      <property name="javax.persistence.jdbc.password" value="app"/>
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.EmbeddedDriver"/>
      <property name="javax.persistence.jdbc.user" value="app"/>
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
    </properties>
  </persistence-unit>
</persistence>
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这里的重大变化是:

  1. 改变了
  2. 连接字符串的更改(这是指向内存DB I设置).
  3. 将ddl-generation属性设置为"drop-and-create-tables".

最后,我的单元测试运行了,万岁!为了解决问题,我的生产代码中存在错误(因为我是JPA的初学者).我所做的更改是LabelDAOImpl.java.我了解到SELECT*在JPA中不起作用:)

/**
 * {@inheritDoc}
 */
@Override
public List<Label> getAllLabels() throws Exception {
    TypedQuery<Label> typedQuery = em.createQuery(
            "SELECT x FROM Label x", Label.class );
    return typedQuery.getResultList();
}
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