persistence - 不同服务器上的 EclipseLink 复合持久性单元，无需 <jar-file>

Question

我的问题几乎在这个线程中得到了回答:

EclipseLink, EntityManager with two persistence units needed

但是我使用了一个 persistence.xml 文件来声明 3 个持久性单元并且它运行良好。但是现在我需要一个复合持久性单元，我不知道也不想为每个持久性单元构建单独的 jars。没有 <jar-file> 有没有办法做到这一点标签。如果没有，谁能给我一个例子，说明如何使用单个持久性单元制作 jar 文件？

编辑 1:
我最终得到了这个配置，但它仍然不起作用 - 我得到的只是这个输出，当我尝试使用 em.createNamedQuery(在我有单独的持久性单元之前工作的女巫)没有任何 react 代码停止在 createEntity 行和就是这样。

持久化文件

<?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="persistenceUnit" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <properties>
      <property name="eclipselink.composite-unit" value="true"/>
    </properties>
  </persistence-unit>
    <persistence-unit name="Minutis" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>database.entity.Entity1</class>
    <class>database.entity.Entity2</class>
    ...
    <properties>
      <property name="eclipselink.composite-unit.member" value="true"/>
    </properties>
  </persistence-unit>
  <persistence-unit name="Minutis2" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>database.entity.EEntity1</class>
    <class>database.entity.EEntity2</class>
    ...
    <properties>
      <property name="eclipselink.composite-unit.member" value="true"/>
    </properties>
  </persistence-unit>
  <persistence-unit name="Minutis3" transaction-type="RESOURCE_LOCAL">
    <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
    <class>database.entity.EEEntity1</class>
    <class>database.entity.EEEntity2</class>
    ...
    <properties>
      <property name="eclipselink.composite-unit.member" value="true"/>
    </properties>
  </persistence-unit>
</persistence>

就是这样EntityManager被 build :

Map minutis = new HashMap();
minutis.put("javax.persistence.jdbc.user", "user");
minutis.put("javax.persistence.jdbc.password", "password");
minutis.put("javax.persistence.jdbc.driver", "driver");
minutis.put("javax.persistence.jdbc.url", "url");

Map minutis2= new HashMap();
minutis2.put("javax.persistence.jdbc.user", "user");
minutis2.put("javax.persistence.jdbc.password", "password");
minutis2.put("javax.persistence.jdbc.driver", "driver");
minutis2.put("javax.persistence.jdbc.url", "url");

Map minutis3= new HashMap();
minutis3.put("javax.persistence.jdbc.user", "user");
minutis3.put("javax.persistence.jdbc.password", "password");
minutis3.put("javax.persistence.jdbc.driver", "driver");
minutis3.put("javax.persistence.jdbc.url", "url");

Map persistanceUnitsProps = new HashMap();
persistanceUnitsProps.put("Minutis", minutis);
persistanceUnitsProps.put("Minutis2", minutis2);
persistanceUnitsProps.put("Minutis3", minutis3);

Map props = new HashMap();
props.put("eclipselink.logging.level", "FINEST");
props.put("eclipselink.composite-unit.properties", persistanceUnitsProps);

EntityManagerFactory emf = Persistence.createEntityManagerFactory("persistenceUnit", props);
em = emf.createEntityManager();

这是我得到的输出:

run:
[EL Finest]: 2012-10-09 09:04:43.071--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--Begin predeploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Initial; factoryCount 0
[EL Finest]: 2012-10-09 09:04:43.099--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--property=eclipselink.orm.throw.exceptions; default value=true
[EL Finest]: 2012-10-09 09:04:43.116--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--End predeploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Predeployed; factoryCount 0
[EL Finer]: 2012-10-09 09:04:43.117--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--JavaSECMPInitializer - transformer is null.
[EL Finest]: 2012-10-09 09:04:43.117--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--Begin predeploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Predeployed; factoryCount 0
[EL Finest]: 2012-10-09 09:04:43.117--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--End predeploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Predeployed; factoryCount 1
[EL Finest]: 2012-10-09 09:04:43.125--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--Begin deploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Predeployed; factoryCount 1
[EL Finest]: 2012-10-09 09:04:43.128--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--property=eclipselink.logging.level; value=FINEST
[EL Finest]: 2012-10-09 09:04:43.128--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--property=eclipselink.logging.level; value=FINEST
[EL Info]: 2012-10-09 09:04:43.13--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--EclipseLink, version: Eclipse Persistence Services - 2.3.0.v20110604-r9504
[EL Info]: 2012-10-09 09:04:43.138--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit login successful
[EL Warning]: 2012-10-09 09:04:43.146--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units.  Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
[EL Finer]: 2012-10-09 09:04:43.146--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--The collection of metamodel types is empty. Model classes may not have been found during entity search for Java SE and some Java EE container managed persistence units.  Please verify that your entity classes are referenced in persistence.xml using either <class> elements or a global <exclude-unlisted-classes>false</exclude-unlisted-classes> element
[EL Finest]: 2012-10-09 09:04:43.147--SessionBroker(2079047885)--Thread(Thread[SwingWorker-pool-1-thread-1,5,main])--End deploying Persistence Unit persistenceUnit; session file:/C:/Users/Minutis/Documents/NetBeansProjects/JavaApplication4/build/classes/_persistenceUnit; state Deployed; factoryCount 1

编辑 2:

我认为问题在于持久性单元没有看到任何实体，尽管我使用类标签声明它们......对此有任何帮助吗？

Answer 1

你遇到了什么错误？还是挂了？如果它挂了，你需要打破它并获取堆栈跟踪。

一般来说，您需要 ，这是指定子持久性单元的唯一方法。您不需要将类放在 jar 文件中(尽管这是最容易做的事情)，您可以在 jar 中包含 persistence.xml 文件。