运行 JUnit 测试时出错(JPA、Derby、Hibernate、Guice)

发布于 2024-11-25 20:54:38 字数 13057 浏览 3 评论 0原文

我正在尝试为我的 DAO 对象创建 JUnit 测试。 JUnit 直接从 Netbeans 运行。我对其中一些技术还很陌生,因此我花了很多时间来追踪我的错误来自哪里。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 信息:找不到 javadb 客户端 jar 文件,derby jdbc 默认情况下驱动程序不可用。致命的 [DatasourceConnectionProvider] - 找不到数据源:Waylon org.omg.CORBA.COMM_FAILURE:良好:IOP00410001:连接失败: 套接字类型:IIOP_CLEAR_TEXT;主机名:本地主机;端口:3700 vmcid: OMG 次要代码:1 已完成:无 javax.naming.NamingException:Lookup 'Waylon' 失败 SerialContext[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javax.naming.NamingException:无法获取 SerialContextProvider 用于 SerialContext[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:很好:IOP00410001: 连接失败:socketType:IIOP_CLEAR_TEXT;主机名:本地主机; 端口:3700 vmcid:OMG 次要代码:1 已完成:否]] 位于 sun.reflect.GenerateConstructorAccessor31.newInstance(来源未知) 在 com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518) 在 sun.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 javax.naming.InitialContext.lookup(InitialContext.java:392) 处 com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:248) 在 com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:95) 在 org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52) 在 com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.handleFullLogging(WrapperGenerator.java:387) 在 org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.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) 在 org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62) 在 com.sun.corba.ee.spi.orbutil.proxy.CompositeInitationHandlerImpl.invoke(CompositeInitationHandlerImpl.java:99) 在 org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009) 在 $Proxy40.connectFailure(来源不明) org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292) 在 com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl。(SocketOrChannelConnectionImpl.java:257) 在 org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859) 在 com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl。(SocketOrChannelConnectionImpl.java:270) 在 org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669) 在 com.sun.corba.ee.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:129) 在 com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:223) 在 org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126) 在 com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:228) 在javax.persistence.Persistence.createEntityManagerFactory(未知 来源)于 com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.is_a(CorbaClientDelegateImpl.java:393) 在 org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:112) 处 javax.persistence.Persistence.createEntityManagerFactory(未知 来源)于 org.omg.CosNaming.NamingContextHelper.narrow(NamingContextHelper.java:69) 在 com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94) 在 com.sun.enterprise.naming.impl.SerialContext$ProviderCacheKey.getNameService(SerialContext.java:1241) 在 waylon.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36) 在 com.sun.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) 处 com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:504) 在 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 在 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) 处 java.lang.reflect.Method.invoke(Method.java:597) 在 org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52) 在 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) 在 org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124) 在 org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) 在 org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29) 在 org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62) 在 org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) 在 org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009) 在 org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27) 在 org.hibernate.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) 在 org.junit.runners.ParentRunner.run(ParentRunner.java:303) 处 org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669) 在junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39) 在 org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126) 在 org.apache.tools.ant.taskdefs.可选.junit.JUnitTestRunner.run(JUnitTestRunner.java:518) 在javax.persistence.Persistence.createEntityManagerFactory(未知 来源)位于 org.apache.tools.ant.taskdefs.可选.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052) 在 org.apache.tools.ant.taskdefs.可选.junit.JUnitTestRunner.main(JUnitTestRunner.java:906) 在javax.persistence.Persistence.createEntityManagerFactory(未知 来源)于 com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94) 在 waylon.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36) 引起原因:javax.naming.NamingException:无法获取 SerialContextProvider 用于 SerialContext[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:很好:IOP00410001: 连接失败:socketType:IIOP_CLEAR_TEXT;主机名:本地主机; 端口:3700 vmcid:OMG 次要代码:1 已完成:否] 在 sun.reflect.NativeMethodAccessorImpl.invoke0(本机方法) at com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:352) 在 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 在 com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:504) ... 29 更多在 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

persistence.xml

<?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>

我的 DAO 正在测试:

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();
        }
    }
}

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 ) );
    }
}

任何帮助将不胜感激。谢谢。

I'm attempting to create a JUnit test for my DAO object. The JUnit is ran directly from Netbeans. I'm quite new to several of these technologies, and as a result I'm having a heck of a time tracing down where my errors are coming from. My code and the corresponding error that I'm seeing are:

Jul 22, 2011 7:09:09 PM
com.sun.enterprise.v3.server.CommonClassLoaderServiceImpl
findDerbyClient INFO: Cannot find javadb client jar file, derby jdbc
driver will not be available by default. FATAL
[DatasourceConnectionProvider] - Could not find datasource: Waylon
org.omg.CORBA.COMM_FAILURE: FINE: IOP00410001: Connection failure:
socketType: IIOP_CLEAR_TEXT; hostname: localhost; port: 3700 vmcid:
OMG minor code: 1 completed: No javax.naming.NamingException: Lookup
failed for 'Waylon' in
SerialContext[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 exception is javax.naming.NamingException: Unable to acquire
SerialContextProvider for
SerialContext[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 exception is org.omg.CORBA.COMM_FAILURE: FINE: IOP00410001:
Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost;
port: 3700 vmcid: OMG minor code: 1 completed: No]] at
sun.reflect.GeneratedConstructorAccessor31.newInstance(Unknown Source)
at
com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at
com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at javax.naming.InitialContext.lookup(InitialContext.java:392) at
com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:248)
at
com.sun.corba.ee.spi.orbutil.logex.corba.CorbaExtension.makeException(CorbaExtension.java:95)
at
org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52)
at
com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.handleFullLogging(WrapperGenerator.java:387)
at
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
at
com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator.access$400(WrapperGenerator.java:107)
at
org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29)
at
com.sun.corba.ee.spi.orbutil.logex.WrapperGenerator$2.invoke(WrapperGenerator.java:511)
at
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
at
com.sun.corba.ee.spi.orbutil.proxy.CompositeInvocationHandlerImpl.invoke(CompositeInvocationHandlerImpl.java:99)
at
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
at $Proxy40.connectFailure(Unknown Source) at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
at
com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.(SocketOrChannelConnectionImpl.java:257)
at
org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
at
com.sun.corba.ee.impl.transport.SocketOrChannelConnectionImpl.(SocketOrChannelConnectionImpl.java:270)
at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
at
com.sun.corba.ee.impl.transport.SocketOrChannelContactInfoImpl.createConnection(SocketOrChannelContactInfoImpl.java:129)
at
com.sun.corba.ee.impl.protocol.CorbaClientRequestDispatcherImpl.beginRequest(CorbaClientRequestDispatcherImpl.java:223)
at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)
at
com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.request(CorbaClientDelegateImpl.java:228)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
com.sun.corba.ee.impl.protocol.CorbaClientDelegateImpl.is_a(CorbaClientDelegateImpl.java:393)
at org.omg.CORBA.portable.ObjectImpl._is_a(ObjectImpl.java:112) at
javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
org.omg.CosNaming.NamingContextHelper.narrow(NamingContextHelper.java:69)
at
com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
at
com.sun.enterprise.naming.impl.SerialContext$ProviderCacheKey.getNameService(SerialContext.java:1241)
at waylon.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36) at
com.sun.enterprise.naming.impl.SerialContext.getRemoteProvider(SerialContext.java:411)
at
com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:347)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 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)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at javax.naming.InitialContext.lookup(InitialContext.java:392) at
java.lang.reflect.Method.invoke(Method.java:597) at
org.hibernate.connection.DatasourceConnectionProvider.configure(DatasourceConnectionProvider.java:52)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:124)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.hibernate.ejb.InjectionSettingsFactory.createConnectionProvider(InjectionSettingsFactory.java:29)
at
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:62)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2009)
at
org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1292)
at
org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
at
org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
at org.junit.runners.ParentRunner.run(ParentRunner.java:303) at
org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:669)
at junit.framework.JUnit4TestAdapter.run(JUnit4TestAdapter.java:39)
at
org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:126)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:518)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:1052)
at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:906)
at javax.persistence.Persistence.createEntityManagerFactory(Unknown
Source) at
com.google.inject.persist.jpa.JpaPersistService.start(JpaPersistService.java:94)
at waylon.label.LabelDAOIJTest.setUpClass(LabelDAOIJTest.java:36)
Caused by: javax.naming.NamingException: Unable to acquire
SerialContextProvider for
SerialContext[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 exception is org.omg.CORBA.COMM_FAILURE: FINE: IOP00410001:
Connection failure: socketType: IIOP_CLEAR_TEXT; hostname: localhost;
port: 3700 vmcid: OMG minor code: 1 completed: No] at
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at
com.sun.enterprise.naming.impl.SerialContext.getProvider(SerialContext.java:352)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:504)
... 29 more at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

persistence.xml

<?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>

My DAO under Test:

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();
        }
    }
}

My JUnit Test:

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 ) );
    }
}

Any help would be greatly appreciated. Thanks.

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岁月打碎记忆 2024-12-02 20:54:38

这花了很长时间才弄清楚。我认为这里的总体教训是一次只学习一项新技术。我提供了运行 JUnit 所采取的一系列步骤,但总的来说,RTFM 解决了几个错误。

为了给予应得的信任,这些资源发挥了巨大的作用。

  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。这涉及到重新创建每个表并重新建立外键依赖关系(很烦人,但很有必要)。

然后,我按照第二个教程让 netbeans 自动从我的数据库表生成一个实体。我的实体不需要任何更改,但这确实导致 Netbeans 生成 persistence.xml。我将它与我自己的进行比较,并提出了这个片段:

<?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>

这里的大变化是:

  1. 连接字符串的变化
  2. (这是指向我设置的内存数据库)。
  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!为了解决这个问题,我的生产代码中存在错误(因为我是 JPA 的初学者)。我所做的更改是针对 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();
}

This took a long time to figure out. I think the overall lesson here is to learn only one new technology at a time. I've provided the series of steps I took to get my JUnits to run, but overall it was several mistakes that were resolved by RTFM.

To give credit where it is due, these resources helped tremendously.

  1. http://blogs.oracle.com/geertjan/entry/embedded_database_for_netbeans_platform
  2. http://platform.netbeans.org/tutorials/nbm-crud.html
  3. Eclipslink - Unknown entity type

I started by recreating my database service using the first resource. This involved recreating each table and reestablishing the foreign key dependencies (annoying, but necessary).

I then followed the second tutorial to have netbeans automatically generate an Entity from my database table. My entity required no changes, but this did cause Netbeans to generate a persistence.xml. I compared it against my own, and came up with with this segment:

<?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>

The big changes here are:

  1. The change in
  2. The change in connection string (this is to point to the in memory DB I setup).
  3. Setting the ddl-generation property to "drop-and-create-tables".

Finally, my unit test ran, hooray! Just to round things out, there were errors in my production code (because I'm a total beginner at JPA). The changes I made were to LabelDAOImpl.java. I learned that SELECT * doesn't work in JPA :)

/**
 * {@inheritDoc}
 */
@Override
public List<Label> getAllLabels() throws Exception {
    TypedQuery<Label> typedQuery = em.createQuery(
            "SELECT x FROM Label x", Label.class );
    return typedQuery.getResultList();
}
弥枳 2024-12-02 20:54:38

如果您使用的是 spring,请确保您的应用程序上下文已正确解析。比如为测试激活适当的弹簧轮廓。
这对我有用

If you are using spring, Make sure you have your application context resolved properly. Like activate appropriate spring profile for the test.
That worked for me

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