你好，世界！ 与远程无状态会话Bean(Hello World! with Remote Sta

2019-07-31 06:59发布

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美好的一天！ 我是新人中的JavaEE 6我试图利用下面的教程中创建一个开工项目： 在GlassFish服务器上创建和运行应用客户端 。 我创建四个项目一步一步：JavaSE的LIB存储一个EJB远程接口，EJB模块和其它情况ther're教程说明。

我的平台：

  • 经销商ID：Ubuntu的说明：Ubuntu的10.10发行版：10.10代号：特立独行
  • jdk1.6.0_26
  • Netbean7.2（构建201207171143）
  • GlassFish应用服务器3+

我的远程接口

    package ejb.started;
    //    
    import javax.ejb.Remote;
    //
    @Remote
    public interface StartedSessionBeanRemote {

        String getHelloWorld();

    }

它的实现： 

package ejb.started;
//
import javax.ejb.Stateless;
//
@Stateless(name="StartedSessionBeanRemote")
public class StartedSessionBean implements StartedSessionBeanRemote {

    @Override
    public String getHelloWorld() {
       return ("Hello world, EJB!");
    }

}

和客户端的代码： 

package startedentappclient;
//
import ejb.started.StartedSessionBeanRemote;
import javax.ejb.EJB;
//
public class AppClientMain {
    @EJB
    private static StartedSessionBeanRemote startedSessionBean;
    public static void main(String[] args) {
        System.err.println("EJB: "+startedSessionBean.getHelloWorld());
    }
}

当我尝试运行远程客户端凸出，我收到以下的输出： 

ant -f /home/ilya/Workspace/git/workspace/StartedEntAppClient -DforceRedeploy=false run
init:
EJBRemoteInterface.init:
Deleting: /home/ilya/Workspace/git/workspace/EJBRemoteInterface/build/built-jar.properties
EJBRemoteInterface.deps-jar:
Updating property file: /home/ilya/Workspace/git/workspace/EJBRemoteInterface/build/built-jar.properties
EJBRemoteInterface.compile:
EJBRemoteInterface.jar:
deps-jar:
compile:
library-inclusion-in-archive:
dist:
pre-run-deploy:
Redeploying /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/StartedEntAppClient.jar
Initializing...
post-run-deploy:
run-deploy:
Copying 1 file to /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist
Copying 2 files to /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/StartedEntAppClientClient
Warning: /home/ilya/Workspace/git/workspace/StartedEntAppClient/dist/gfdeploy/StartedEntAppClient does not exist.
com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session into class startedentappclient.AppClientMain: Lookup failed for 'java:comp/env/startedentappclient.AppClientMain/startedSessionBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl}
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:703)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.inject(InjectionManagerImpl.java:470)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:213)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl.injectClass(InjectionManagerImpl.java:205)
    at org.glassfish.appclient.client.acc.AppClientContainer$ClientMainClassSetting.getClientMainClass(AppClientContainer.java:625)
    at org.glassfish.appclient.client.acc.AppClientContainer.getMainMethod(AppClientContainer.java:517)
    at org.glassfish.appclient.client.acc.AppClientContainer.completePreparation(AppClientContainer.java:411)
    at org.glassfish.appclient.client.acc.AppClientContainer.prepare(AppClientContainer.java:319)
    at org.glassfish.appclient.client.AppClientFacade.prepareACC(AppClientFacade.java:278)
    at org.glassfish.appclient.client.acc.agent.AppClientContainerAgent.premain(AppClientContainerAgent.java:82)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:323)
    at sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:338)
Caused by: javax.naming.NamingException: Lookup failed for 'java:comp/env/startedentappclient.AppClientMain/startedSessionBean' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session' .  Actual (possibly internal) Remote JNDI name used for lookup is 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' [Root exception is javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]]]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at com.sun.enterprise.container.common.impl.util.InjectionManagerImpl._inject(InjectionManagerImpl.java:599)
    ... 15 more
Caused by: javax.naming.NamingException: Exception resolving Ejb for 'Remote ejb-ref name=startedentappclient.AppClientMain/startedSessionBean,Remote 3.x interface =ejb.started.StartedSessionBeanRemote,ejb-link=null,lookup=,mappedName=,jndi-name=ejb.started.StartedSessionBeanRemote,refType=Session' .  Actual (possibly internal) Remote JNDI name used for lookup is 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' [Root exception is javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]]
    at com.sun.ejb.EjbNamingReferenceManagerImpl.resolveEjbReference(EjbNamingReferenceManagerImpl.java:191)
    at com.sun.enterprise.container.common.impl.ComponentEnvManagerImpl$EjbReferenceProxy.create(ComponentEnvManagerImpl.java:1109)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:776)
    at com.sun.enterprise.naming.impl.GlassfishNamingManagerImpl.lookup(GlassfishNamingManagerImpl.java:744)
    at com.sun.enterprise.naming.impl.JavaURLContext.lookup(JavaURLContext.java:169)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:498)
    ... 18 more
Caused by: javax.naming.NamingException: Lookup failed for 'ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote' in SerialContext[myEnv={java.naming.factory.initial=com.sun.enterprise.naming.impl.SerialInitContextFactory, java.naming.factory.url.pkgs=com.sun.enterprise.naming, java.naming.factory.state=com.sun.corba.ee.impl.presentation.rmi.JNDIStateFactoryImpl} [Root exception is javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found]
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:518)
    at com.sun.enterprise.naming.impl.SerialContext.lookup(SerialContext.java:455)
    at javax.naming.InitialContext.lookup(InitialContext.java:392)
    at com.sun.ejb.EjbNamingReferenceManagerImpl.resolveEjbReference(EjbNamingReferenceManagerImpl.java:186)
    ... 23 more
Caused by: javax.naming.NameNotFoundException: ejb.started.StartedSessionBeanRemote#ejb.started.StartedSessionBeanRemote not found
    at com.sun.enterprise.naming.impl.TransientContext.doLookup(TransientContext.java:248)
    at com.sun.enterprise.naming.impl.TransientContext.lookup(TransientContext.java:215)
    at com.sun.enterprise.naming.impl.SerialContextProviderImpl.lookup(SerialContextProviderImpl.java:77)
    at com.sun.enterprise.naming.impl.RemoteSerialContextProviderImpl.lookup(RemoteSerialContextProviderImpl.java:109)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie.dispatchToMethod(ReflectiveTie.java:144)
    at com.sun.corba.ee.impl.presentation.rmi.ReflectiveTie._invoke(ReflectiveTie.java:174)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatchToServant(CorbaServerRequestDispatcherImpl.java:528)
    at com.sun.corba.ee.impl.protocol.CorbaServerRequestDispatcherImpl.dispatch(CorbaServerRequestDispatcherImpl.java:199)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequestRequest(CorbaMessageMediatorImpl.java:1624)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:1486)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleInput(CorbaMessageMediatorImpl.java:990)
    at com.sun.corba.ee.impl.protocol.giopmsgheaders.RequestMessage_1_2.callback(RequestMessage_1_2.java:214)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.handleRequest(CorbaMessageMediatorImpl.java:742)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.dispatch(CorbaMessageMediatorImpl.java:539)
    at com.sun.corba.ee.impl.protocol.CorbaMessageMediatorImpl.doWork(CorbaMessageMediatorImpl.java:2324)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.performWork(ThreadPoolImpl.java:497)
    at com.sun.corba.ee.impl.orbutil.threadpool.ThreadPoolImpl$WorkerThread.run(ThreadPoolImpl.java:540)
Java Result: 1
run:
BUILD SUCCESSFUL (total time: 11 seconds)

我不能假设那是什么问题。 我建我的第二台PC上相同的项目，并全部顺利工作。 这人有相同的软件平台。

Answer 1:

当你写： 

@EJB
private static StartedSessionBeanRemote startedSessionBean;

您的客户端尝试执行注射是EJB的。 在你的情况下显然并不成功： 

com.sun.enterprise.container.common.spi.util.InjectionException: Exception attempting to inject...

您可以通过使用mappedName结构帮助自己。 重写以下列方式代码的几行： 

@Stateless(mappedName="ejb/StartedSessionBeanRemote")
public class StartedSessionBean implements StartedSessionBeanRemote {

和

@EJB(mappedName="ejb/StartedSessionBeanRemote")
private static StartedSessionBeanRemote startedSessionBean;

最后，确保你的EJB是在客户端部署之前，因为没有EJB客户端不能注入吧:)



Answer 2:

我相信使用@EJB注释从一个主要方法，因为这方法不是由服务器管理的，你不能访问EJB。 相反，你应该使用JNDI。

我如何从一个独立的Java客户端访问远程EJB组件？



文章来源: Hello World! with Remote Stateless Session Bean
标签： java-ee netbeans glassfish javabeans glassfish-3
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