java - 使用 stub 和 openejb 框架测试 ejb

Question

我正在尝试测试一个已注入(inject)另一个 EJB 的 EJB。出于测试目的，我想对注入(inject)的 EJB 使用 stub 。我使用 openEJB 作为 EJB 的框架进行测试。

这是 EJB:

@Stateless
@Local(IService.class)
public class Service implements IService {

    @EJB
    private IBean bean;

    @Override
    public String doService(String data) {
        return bean.process(data);
    }
}

真正注入(inject)的EJB:

@Stateless
@Local(IBean.class)
public class Bean implements IBean {

    private static Logger logger = Logger.getLogger(Bean.class);

    @Override
    public String process(String data) {
        logger.info("Bean processing : " + data);
        return "Bean processing : " + data;
    }
}

EJB 的 stub 版本:

@Stateless
@Local(IBean.class)
public class BeanStub implements IBean {

    private static Logger logger = Logger.getLogger(BeanStub.class);

    @Override
    public String process(String data) {
        logger.info("Stub processing : " + data);
        return "Stub processing : " + data;
    }
}

以及使用的 JUnit 测试:

public class ServiceTest {

    private static Logger logger = Logger.getLogger(ServiceTest.class);

    private static InitialContext context;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        // openEJB
        Properties p = new Properties();
        p.put(Context.INITIAL_CONTEXT_FACTORY,"org.apache.openejb.client.LocalInitialContextFactory");
        p.put("openejb.altdd.prefix", "stub"); // use specific ejb-jar
        p.put("openejb.descriptors.output", "true");

        context = new InitialContext(p);
    }

    @Test
    public void testServiceStub() {
        try {
            IService service = (IService) context.lookup("ServiceStubLocal");
            assertNotNull(service);
            String msg = service.doService("service");
            assertEquals("Stub processing : service", msg);
        } catch (NamingException e) {
            logger.error(e);
            fail(e.getMessage());
        }
    }
}

我尝试使用特定的 ejb-jar 来覆盖 stub EJB 对真实 EJB 的使用(我想在我的服务中使用“BeanStub”而不是默认的“Bean”):

 <ejb-jar>
    <enterprise-beans>
    <session id="ServiceStub">
        <ejb-name>ServiceStub</ejb-name>
        <ejb-class>tests.Service</ejb-class>
        <ejb-local-ref>
            <ejb-ref-name>tests.Service/bean</ejb-ref-name>
            <ejb-link>BeanStub</ejb-link>
        </ejb-local-ref>
    </session>          
    </enterprise-beans>
</ejb-jar> 

不幸的是，我在声明 EJB 时遇到了问题:

    Apache OpenEJB 3.1.4    build: 20101112-03:32http://openejb.apache.org/17:14:29,225  INFO startup:70 - openejb.home = D:\Workspace_Java\tests\testejb17:14:29,225  INFO startup:70 - openejb.base = D:\Workspace_Java\tests\testejb17:14:29,350  INFO config:70 - Configuring Service(id=Default Security Service, type=SecurityService, provider-id=Default Security Service)17:14:29,350  INFO config:70 - Configuring Service(id=Default Transaction Manager, type=TransactionManager, provider-id=Default Transaction Manager)17:14:29,381  INFO config:70 - Found EjbModule in classpath: D:\Workspace_Java\tests\testejb\target\test-classes17:14:29,412  INFO config:70 - Found EjbModule in classpath: D:\Workspace_Java\tests\testejb\target\classes17:14:29,428  INFO config:70 - Beginning load: D:\Workspace_Java\tests\testejb\target\test-classes17:14:29,428  INFO config:70 - AltDD ejb-jar.xml -> file:/D:/Workspace_Java/tests/testejb/target/test-classes/META-INF/stub.ejb-jar.xml17:14:29,850  INFO config:70 - Beginning load: D:\Workspace_Java\tests\testejb\target\classes17:14:29,850  INFO config:70 - AltDD ejb-jar.xml -> file:/D:/Workspace_Java/tests/testejb/target/classes/META-INF/stub.ejb-jar.xml17:14:29,850  INFO config:70 - Configuring enterprise application: classpath.ear17:14:29,912  INFO config:70 - Configuring Service(id=Default Stateless Container, type=Container, provider-id=Default Stateless Container)17:14:29,912  INFO config:70 - Auto-creating a container for bean ServiceStub: Container(type=STATELESS, id=Default Stateless Container)17:14:29,912  INFO options:70 - Using 'openejb.descriptors.output=true'17:14:29,912  INFO options:70 - Using 'openejb.descriptors.output=true'17:14:29,928  INFO config:70 - Dumping Generated ejb-jar.xml to: C:\TEMP\ejb-jar-6391test-classes.xml17:14:29,959  INFO config:70 - Dumping Generated openejb-jar.xml to: C:\TEMP\openejb-jar-6392test-classes.xml17:14:29,959  INFO options:70 - Using 'openejb.descriptors.output=true'17:14:29,959  INFO config:70 - Dumping Generated ejb-jar.xml to: C:\TEMP\ejb-jar-6393classes.xml17:14:29,975  INFO config:70 - Dumping Generated openejb-jar.xml to: C:\TEMP\openejb-jar-6394classes.xml17:14:30,006  INFO config:70 - Enterprise application "classpath.ear" loaded.17:14:30,084  INFO startup:70 - Assembling app: classpath.ear17:14:30,131  INFO startup:70 - Jndi(name=ServiceStubLocal) --> Ejb(deployment-id=ServiceStub)17:14:30,131 ERROR startup:46 - Jndi name could not be bound; it may be taken by another ejb.  Jndi(name=openejb/Deployment/ServiceStub/tests.IService!Local)17:14:30,131  INFO startup:70 - Undeploying app: classpath.ear17:14:30,147 ERROR startup:50 - Application could not be deployed:  classpath.earorg.apache.openejb.OpenEJBException: Creating application failed: classpath.ear: Unable to bind business local interface for deployment ServiceStub    at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:679)    at org.apache.openejb.assembler.classic.Assembler.createApplication(Assembler.java:450)

方法或编写 ejb-jar 的方式有问题吗？

Answer 1

我在使用 OpenEJB 时也遇到了类似的问题和障碍。如果您需要对测试进行 stub 和模拟(谁不需要)，请看看我最终设法处理它的人(在 OpenEJB 联合创始人 David 的大力帮助下)。在最新版本(3.1.4)中，OpenEJB 的工作方式与 Arquillian 非常相似，允许内部类测试驱动程序，无需 ejb-jar.xml 和类路径扫描。

我在这里描述了我的障碍:http://jakub.marchwicki.pl/posts/2011/07/01/testing-ejb-application-openejb-without-classpath-scanning/ 。看一下，也许这会让你的测试更容易。