如何在Java EE 6应用程序中为derby嵌入式数据库在EclipseLink/JPA 2.0中设置JTA数据源？

Question

我无法在单元测试中找到ecbDB JTA数据源.

对于RESOURCE_LOCAL,相同的persistence.xml可以正常工作.仅在EJB容器内,它无法找到JTA数据源.

执行单元测试时,我得到以下异常.

SEVERE: Exception while invoking class org.glassfish.persistence.jpa.JPADeployer prepare method
java.lang.RuntimeException: javax.naming.NamingException: Lookup failed for 'ecbDB' in SerialContext  [Root exception is javax.naming.NameNotFoundException: ecbDB not found]
 at org.glassfish.persistence.jpa.PersistenceUnitInfoImpl.<init>(PersistenceUnitInfoImpl.java:111)

这是persistence.xml

<?xml version="1.0" encoding="UTF-8"?>
<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="ecbPU" transaction-type="JTA">
        <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
        <jta-data-source>ecbDB</jta-data-source>
        <mapping-file>META-INF/orm.xml</mapping-file>

        <properties>
            <property
              name="javax.persistence.jdbc.driver"
              value="org.apache.derby.jdbc.EmbeddedDriver" />
            <property
              name="javax.persistence.jdbc.url"
              value="jdbc:derby:target/ecbDB;create=true" />

            <!-- EclipseLink 2.0 properties -->
            <property name="eclipselink.ddl-generation" value="drop-and-create-tables" />
            <property name="eclipselink.ddl-generation.output-mode"
                      value="sql-script" />
            <!-- <property name="eclipselink.ddl-generation.output-mode" value="database"
             /> -->
            <property name="eclipselink.application-location" value="./target/ddl" />
            <property name="eclipselink.create-ddl-jdbc-file-name"
                      value="create.sql" />
            <property name="eclipselink.drop-ddl-jdbc-file-name" value="drop.sql" />
            <property name="eclipselink.logging.level" value="ALL" />
            <property name="eclipselink.logging.file" value="./target/eclipselink.logs" />
        </properties>
    </persistence-unit>
</persistence>

Answer 1

首先确保您的 derby 配置具有合适的 JDBC 资源（使用 shell 命令“asadmin list-jdbc-resources”）。如果没有，请使用“asadmin create-jdbc-resource”创建一个。如需帮助，请键入“asadmin list-commands”。