Question

是否可以在Glassfish v3上使用CDI将EJB 3.1 bean注入POJO？

我的类（在EJB模块中）：

@Singleton
@LocalBean
@Startup
@Named
public class NewSingletonBean {

    @PostConstruct
    public void init(){
        System.out.println("NewSingletonBean INIT");
    }

}

_

@Singleton
@LocalBean
@Startup
@DependsOn(value="NewSingletonBean")
public class NewSingletonBean2 {

    @Inject NewSingletonBean newSingletonBean;

    @PostConstruct
    public void init(){
        System.out.println("NewSingletonBean2 INIT");
        System.out.println("EJB injected into EJB: " + (newSingletonBean != null));
        MyPOJO p = new MyPOJO();
        p.sth();
    }

}

_

public class MyPOJO {
        @Inject NewSingletonBean newSingletonBean;

        public void sth(){
            System.out.println("EJB injected into POJO: " + (newSingletonBean != null));
        }
}

服务器输出：

Launching GlassFish on Felix platform
INFO: Registered org.glassfish.ha.store.adapter.cache.ShoalBackingStoreProxy for persistence-type = replicated in BackingStoreFactoryRegistry
INFO: Grizzly Framework 1.9.31 started in: 31ms - bound to [0.0.0.0:4848]
INFO: Grizzly Framework 1.9.31 started in: 109ms - bound to [0.0.0.0:8080]
INFO: Grizzly Framework 1.9.31 started in: 62ms - bound to [0.0.0.0:8181]
INFO: Grizzly Framework 1.9.31 started in: 141ms - bound to [0.0.0.0:3700]
INFO: Grizzly Framework 1.9.31 started in: 0ms - bound to [0.0.0.0:7676]
INFO: GlassFish Server Open Source Edition 3.1 (43) startup time : Felix (2 812ms), startup services(1 172ms), total(3 984ms)
INFO: JMXStartupService: Started JMXConnector, JMXService URL = service:jmx:rmi://9.167.213.195:8686/jndi/rmi://9.167.213.195:8686/jmxrmi
INFO: Hibernate Validator 4.1.0.Final
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: Grizzly Framework 1.9.31 started in: 16ms - bound to [0.0.0.0:8080]
INFO: Grizzly Framework 1.9.31 started in: 16ms - bound to [0.0.0.0:8181]
INFO: SEC1002: Security Manager is OFF.
INFO: SEC1010: Entering Security Startup Service
INFO: SEC1143: Loading policy provider com.sun.enterprise.security.provider.PolicyWrapper.
INFO: SEC1115: Realm [admin-realm] of classtype [com.sun.enterprise.security.auth.realm.file.FileRealm] successfully created.
INFO: SEC1115: Realm [file] of classtype [com.sun.enterprise.security.auth.realm.file.FileRealm] successfully created.
INFO: SEC1115: Realm [certificate] of classtype [com.sun.enterprise.security.auth.realm.certificate.CertificateRealm] successfully created.
INFO: SEC1011: Security Service(s) Started Successfully
INFO: WEB0169: Created HTTP listener [http-listener-1] on host/port [0.0.0.0:8080]
INFO: WEB0169: Created HTTP listener [http-listener-2] on host/port [0.0.0.0:8181]
INFO: WEB0169: Created HTTP listener [admin-listener] on host/port [0.0.0.0:4848]
INFO: WEB0171: Created virtual server [server]
INFO: WEB0171: Created virtual server [__asadmin]
INFO: WEB0172: Virtual server [server] loaded default web module []
INFO: Portable JNDI names for EJB NewSingletonBean2 : [java:global/CDITest/CDITest-ejb/NewSingletonBean2!tries.NewSingletonBean2, java:global/CDITest/CDITest-ejb/NewSingletonBean2]
INFO: Portable JNDI names for EJB NewSingletonBean : [java:global/CDITest/CDITest-ejb/NewSingletonBean!tries.NewSingletonBean, java:global/CDITest/CDITest-ejb/NewSingletonBean]
INFO: WELD-000900 ${parsedVersion (osgiVersion})
INFO: Instantiated an instance of org.hibernate.validator.engine.resolver.JPATraversableResolver.
INFO: NewSingletonBean INIT
INFO: NewSingletonBean2 INIT
INFO: EJB injected into EJB: true
INFO: EJB injected into POJO: false
INFO: WEB0671: Loading application [CDITest#CDITest-war.war] at [CDITest-war]
INFO: CDITest was successfully deployed in 3 531 milliseconds.

注意行：

INFO: EJB injected into EJB: true
INFO: EJB injected into POJO: false

所以看起来@Inject成为EJB工作正常，但进入POJO却没有。我究竟做错了什么？我试过GlassFish 3.1和3.0.1（使用NetBeans 7.0.1）。

编辑：我正在使用NetBeans 7.0.1。 dist目录结构：

│   CDITest.ear
│
└───gfdeploy
    └───CDITest
        ├───CDITest-ejb_jar
        │   │   .netbeans_automatic_build
        │   │   .netbeans_update_resources
        │   │
        │   ├───META-INF
        │   │       beans.xml
        │   │       MANIFEST.MF
        │   │
        │   └───tries
        │           MyPOJO.class
        │           NewSingletonBean.class
        │           NewSingletonBean2.class
        │
        ├───CDITest-war_war
        │   │   index.jsp
        │   │
        │   ├───META-INF
        │   │       MANIFEST.MF
        │   │
        │   └───WEB-INF
        │       └───classes
        │               .netbeans_automatic_build
        │               .netbeans_update_resources
        │
        └───META-INF
                MANIFEST.MF

Unpacked EAR结构：

│   CDITest-ejb.jar
│   CDITest-war.war
│
└───META-INF
        MANIFEST.MF

解压缩的EJB模块jar结构：

├───META-INF
│       beans.xml
│       MANIFEST.MF
│
└───tries
        MyPOJO.class
        NewSingletonBean.class
        NewSingletonBean2.class

Answer 1

我对CDI不是很熟悉，但我想如果你自己创建POJO对象，就不会发生注入。你试过了吗？

@Inject
private MyPOJO p;

而不是：

MyPOJO p = new MyPOJO();

Answer 2

我能够使用@EJB或@Inject在非EJB类（如Servlet和DAO）中注入EJB（和其他资源）。通常你会使用@EJB注入一个ejb和@Inject来注入一个非ejb资源。

另外，不要忘记“beans.xml”文件，这需要激活CDI：

http://download.oracle.com/javaee/6/tutorial/doc/gjbnz.html

我认为这可能是你的问题。实际上缺少这个文件会使CDI失效，但是你仍然只是将注入的东西注入到你的EJB中，因为这甚至可以在Java EE的前CDI版本中实现。

CDI将EJB注入到Glassfish v3上的POJO中

2 个答案: