把什么放到jos-data-persistence.xml中？

Question

我应该把什么样的价值为<jta-data-source>我的persistence.xml？

在glassfish管理面板中,我创建了一个数据源名称"abcDS".在我jndi.properties(内部src/test/resources)我定义它像这样:

[...]
abcDS=new://Resource?type=DataSource
abcDS.JdbcDriver=org.hsqldb.jdbcDriver
abcDS.JdbcUrl=jdbc:hsqldb:mem:testdb
abcDS.JtaManaged=true
[...]

我应该放persistence.xml什么？我发现了很多在网络变体,如:"jdbc/abcDS","java:/abcDS","abcDS".哪一个是对的？这有什么规则吗？我知道它与JNDI有关,但......

我正在尝试在单元测试中创建EMF:

EntityManagerFactory emf = Persistence.createEntityManagerFactory("abc");

这就是我在日志中得到的:

[...]
SEVERE: Could not find datasource: abcDS javax.naming.NameNotFoundException: 
    Name "abcDS" not found.
at org.apache.openejb.core.ivm.naming.IvmContext.federate(IvmContext.java:193)
at org.apache.openejb.core.ivm.naming.IvmContext.lookup(IvmContext.java:150)
at org.apache.openejb.core.ivm.naming.ContextWrapper.lookup(ContextWrapper.java:115)
at javax.naming.InitialContext.lookup(InitialContext.java:392)
[...]

Answer 1

问题是Persistence.createEntityManagerFactory("abc")"自己动手"API并没有利用嵌入式EJB容器.您可以EntityManager非常轻松地获得在测试用例中管理的容器.

正如相关的jndi/datasource问题一样,我建议您查看examples.zip中的示例.他们都是为了开始进行斗争而设计的.

这是testcase-injection示例中的一个片段,展示了如何从容器中获取EntityManager以及其他用于测试的内容.

首先,在测试中添加一个空的ejb-jar.xml或application-client.xml,以打开扫描测试代码:

• 的src /测试/资源/ META-INF /应用client.xml的

然后,@org.apache.openejb.api.LocalClient使用标准JavaEE注释注释您的测试用例并进行实际注入.

@LocalClient
public class MoviesTest extends TestCase {

    @EJB
    private Movies movies;

    @Resource
    private UserTransaction userTransaction;

    @PersistenceContext
    private EntityManager entityManager;

    public void setUp() throws Exception {
        Properties p = new Properties();
        p.put(Context.INITIAL_CONTEXT_FACTORY, "org.apache.openejb.client.LocalInitialContextFactory");
        p.put("movieDatabase", "new://Resource?type=DataSource");
        p.put("movieDatabase.JdbcDriver", "org.hsqldb.jdbcDriver");
        p.put("movieDatabase.JdbcUrl", "jdbc:hsqldb:mem:moviedb");

        InitialContext initialContext = new InitialContext(p);

        // Here's the fun part
        initialContext.bind("inject", this);
    }

作为movieDatabase我们设置的唯一DataSource,OpenEJB将自动将该DataSource分配给您的持久性单元,而无需修改persistence.xml.你甚至可以离开<jta-data-source>或<non-jta-data-source>空,OpenEJB仍然知道该怎么做.

但为了完整起见,这是特定应用程序如何定义的 persistence.xml

<persistence xmlns="http://java.sun.com/xml/ns/persistence" version="1.0">

  <persistence-unit name="movie-unit">
    <jta-data-source>movieDatabase</jta-data-source>
    <non-jta-data-source>movieDatabaseUnmanaged</non-jta-data-source>
    <class>org.superbiz.testinjection.Movie</class>

    <properties>
      <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
    </properties>
  </persistence-unit>
</persistence>

然后是有趣的部分,在测试中一起使用它

public void test() throws Exception {

    userTransaction.begin();

    try {
        entityManager.persist(new Movie("Quentin Tarantino", "Reservoir Dogs", 1992));
        entityManager.persist(new Movie("Joel Coen", "Fargo", 1996));
        entityManager.persist(new Movie("Joel Coen", "The Big Lebowski", 1998));

        List<Movie> list = movies.getMovies();
        assertEquals("List.size()", 3, list.size());

        for (Movie movie : list) {
            movies.deleteMovie(movie);
        }

        assertEquals("Movies.getMovies()", 0, movies.getMovies().size());

    } finally {
        userTransaction.commit();
    }
}