從實體生成表

Question

我正在嘗試使用Project右鍵單擊-> JPA工具->從實體生成表，從Eclipse Juno中的實體生成表

我將EclipseLink用作JPA Provider。我的應用程序容器是Glassfish4。我的數據庫是在glassfish，derby中嵌入的數據庫。

我的應用程序啟動時沒有錯誤，並且我能夠使用一個簡單的測試bean來向數據庫提交數據（因此，我假設我的連接池和數據源正在按預期工作）

嘗試從實體生成表時，出現以下堆棧跟蹤錯誤：

[EL Info]: EclipseLink, version: Eclipsenter code heree Persistence Services - 2.4.0.v20120608-r11652
[EL Severe]: ejb: Local Exception Stack: 
Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:502)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:109)
    at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:685)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:213)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:85)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:76)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:63)
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.lookup(Unknown Source)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
    ... 11 more

Exception in thread "main" javax.persistence.PersistenceException: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:602)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.getDatabaseSession(EntityManagerFactoryDelegate.java:186)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryDelegate.createEntityManagerImpl(EntityManagerFactoryDelegate.java:278)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:304)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:282)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.perform(Main.java:85)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.execute(Main.java:76)
    at org.eclipse.jpt.jpa.eclipselink.core.ddlgen.Main.main(Main.java:63)
Caused by: Exception [EclipseLink-7060] (Eclipse Persistence Services - 2.4.0.v20120608-r11652): org.eclipse.persistence.exceptions.ValidationException
Exception Description: Cannot acquire data source [jdbc/__planificateur].
Internal Exception: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at org.eclipse.persistence.exceptions.ValidationException.cannotAcquireDataSource(ValidationException.java:502)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:109)
    at org.eclipse.persistence.sessions.DatasourceLogin.connectToDatasource(DatasourceLogin.java:162)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:685)
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:213)
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:542)
    ... 7 more
Caused by: javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file:  java.naming.factory.initial
    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
    at javax.naming.InitialContext.lookup(Unknown Source)
    at org.eclipse.persistence.sessions.JNDIConnector.connect(JNDIConnector.java:103)
    ... 11 more

這是我的persistence.xml

<?xml version="1.0" encoding="UTF-8" ?>
<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" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="planificateurepicerie" transaction-type="JTA">
       <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
       <jta-data-source>jdbc/__planificateur</jta-data-source>
       <class>com.whybe.pe.jpa.Ingredient</class>
       <class>com.whybe.pe.jpa.Recette</class>
       <class>com.whybe.pe.jpa.ComposantRecette</class>
       <properties>
            <property name="eclipselink.ddl-generation" value="create-tables" />
            <property name="eclipselink.ddl-generation.output-mode" value="database" />
           <property name="eclipselink.logging.level" value="FINE"/>
       </properties>
    </persistence-unit>
</persistence> 

我在數據庫開發透視圖中也有數據庫設置，也可以正常工作。

在glassfish控制台內部，我可以成功ping通連接池。

關於ddl為什么不生成的想法我已經用光了...

如果您需要更多詳細信息，請告訴我！

提前致謝！

Answer 1

您正在運行模式下將transaction-type="JTA"用作獨立應用程序。 JPA在默認上下文中查找JNDI資源名稱（請等待，由於運行模式獨立應用程序，當前您的應用程序中沒有上下文）。 更改為該運行模式的transaction-type="LOCAL" 。 例如：

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
  <persistence-unit name="SamplePU" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <exclude-unlisted-classes>false</exclude-unlisted-classes>
    <properties>
      <property name="javax.persistence.jdbc.url" value="jdbc:derby://localhost:1527/sample"/>
      <property name="javax.persistence.jdbc.password" value="123"/>
      <property name="javax.persistence.jdbc.driver" value="org.apache.derby.jdbc.ClientDriver"/>
      <property name="javax.persistence.jdbc.user" value="root"/>
      <property name="eclipselink.logging.level" value="ALL"/>
      <property name="eclipselink.ddl-generation" value="drop-and-create-tables"/>
    </properties>
  </persistence-unit>
</persistence>

但是您正在使用Glassfish4。在服務器上運行該應用程序。 如果您沒有JDNI資源名稱，則需要將其添加到JDBC資源中。 更簡單的方法是使用Glassfish的控制台管理。 默認情況下，您可以在http://localhost:4848找到它。 有關更多信息，請參見第3章JDBC資源 。