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。只有在EJB容器中才能找到JTA数据源。

执行单元测试时出现以下异常..

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

以下是我用于与EclipseLink建立基于JTA的连接的逐步说明。

首先，请确保：

GlassFish服务器已启动并正在运行

asadmin list-domains
Apache Derby服务器已启动并正在运行

NetworkServerControl.bat sysinfo -h localhost -p 1527

接下来，创建JDBC连接池和JDBC资源

创建使用org.apache.derby.jdbc.EmbeddedDataSource

asadmin create-jdbc-connection-pool
  --datasourceclassname org.apache.derby.jdbc.EmbeddedDataSource
  --restype javax.sql.XADataSource
  --property databaseName = ecbDB：serverName = localhost：portNumber = 1527：password = APP：user = APP：connectionAttributes = \; create \ = true EmbeddedPool

创建JDBC资源

asadmin create-jdbc-resource --connectionpoolid EmbeddedPool jdbc / EmbeddedResource

如果您查看GlassFish管理控制台（ localhost：4848 ），您会注意到新的节点：

资源＆gt; JDBC＆gt; JDBC连接池＆gt; EmbeddedPool
资源＆gt; JDBC＆gt; JDBC资源＆gt; JDBC / EmbeddedResource

正如您所看到的，jdbc/EmbeddedResource已分配给EmbeddedPool。

然后，创建persistence.xml的最小版本：

<?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="ecbPU">
        <jta-data-source>jdbc/EmbeddedResource</jta-data-source>
        <properties>
            <property name="eclipselink.logging.level" value="FINE"/>
        </properties> 
    </persistence-unit>
</persistence>

使用无状态/有状态会话bean作为组件来管理持久性操作（据我所知，这是Java EE应用程序的首选策略）：

public interface ECBService {
}

@Stateless
public class ECBServiceBean implements ECBService {
    @PersistenceContext(unitName = "ecbPU")
    protected EntityManager em;
}

使用setter注入将环境命名上下文依赖项分配到字段中（在单元测试的情况下很有用）：

public class ECBServlet extends HttpServlet {
    private ECBService service;

    @EJB
    public void setECBService(EcbService service) {
        this.service = service;
    }
}

最后，部署产生以下内容：

INFO: EclipseLink, version: Eclipse Persistence Services - 2.5.0.v20130507
FINE: Detected database platform: org.eclipse.persistence.platform.database.JavaDBPlatform
CONFIG: connecting(DatabaseLogin(
    platform=>DatabasePlatform
    user name=> ""
    connector=>JNDIConnector datasource name=>null
))
CONFIG: Connected: jdbc:derby:ecbDB
    User: APP
    Database: Apache Derby  Version: 10.10.1.1 - (1458268)
    Driver: Apache Derby Embedded JDBC Driver  Version: 10.10.1.1 - (1458268)
CONFIG: connecting(DatabaseLogin(
    platform=>JavaDBPlatform
    user name=> ""
    connector=>JNDIConnector datasource name=>null
))
CONFIG: Connected: jdbc:derby:ecbDB
    User: APP
    Database: Apache Derby  Version: 10.10.1.1 - (1458268)
    Driver: Apache Derby Embedded JDBC Driver  Version: 10.10.1.1 - (1458268)

我希望它有所帮助。

Answer 2

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”。

Answer 3

你是在嵌入式Glassfish下运行吗？如果是这样，你遇到的问题是因为他有一个JTA数据源ecbDB没有在你的domain.xml中定义。在这种情况下，Kaster的答案是正确的，您应该创建嵌入式连接池和关联的JDBC资源。您可以使用asadmin命令或Glassfish Web管理GUI。此时，您还应该从persistence.xml中删除两个javax.persistence.jdbc属性，因为这些设置将受到连接池资源设置的限制。

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？

3 个答案: