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	2008年10月1日		  
	#

          


		
          
			
          EJB3學習－－－Remote&Local 
          
			
			
          今日學習尚學堂老師講的EJB3教程，其中EJB中的Bean的Annotation中，其注釋如下：
          

          

          

          package cn.study.ejb;
          

          
          import javax.ejb.Local;
          
          import javax.ejb.Remote;
          
          import javax.ejb.Stateless;
          

          
@Stateless
          
@Remote()
          
@Local()
          
          public class UserManagerBean implements UserManager {
          

          
              public void addUser(User user) {
          
        System.out.println(user.getUsername()           + "已經(jīng)被成功保存！");
          
        user.setId(          13);
          
    }
          

          
}
          


          
     按照教程敲入代碼，然后也用jboss 4.0.5.GA部署，發(fā)現(xiàn)因為下載的不是安裝版的jboss，所以總是不能夠部署，于是換了jboss 4.2.3.GA就解決了部署問題。但新的問題來了，部署完成后重啟過程中提示:
          

          15:15:59,129 WARN  [ServiceController] Problem creating service jboss.j2ee:service=EJB3,module=ejb_03.jar
          
javax.ejb.EJBException: Local and Remote Interfaces cannot have duplicate interface for bean UserManagerBean
          
 at org.jboss.ejb3.SessionContainer.checkForDuplicateLocalAndRemoteInterfaces(SessionContainer.java:134)
          
 at org.jboss.ejb3.SessionContainer.instantiated(SessionContainer.java:119)
          
 at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:492)
          
 at org.jboss.ejb3.Ejb3Deployment.deployElement(Ejb3Deployment.java:442)
          
 at org.jboss.ejb3.Ejb3Deployment.deployUrl(Ejb3Deployment.java:423)
          
 at org.jboss.ejb3.Ejb3Deployment.deploy(Ejb3Deployment.java:384)
          
 at org.jboss.ejb3.Ejb3Deployment.create(Ejb3Deployment.java:327)
          
 at org.jboss.ejb3.Ejb3Module.createService(Ejb3Module.java:77)
          
 at org.jboss.system.ServiceMBeanSupport.jbossInternalCreate(ServiceMBeanSupport.java:260)
          
 at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:243)
          
 at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
          
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          
 at java.lang.reflect.Method.invoke(Method.java:597)
          
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
          
 at $Proxy0.create(Unknown Source)
          
 at org.jboss.system.ServiceController.create(ServiceController.java:330)
          
 at org.jboss.system.ServiceController.create(ServiceController.java:273)
          
 at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
          
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          
 at java.lang.reflect.Method.invoke(Method.java:597)
          
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
          
 at $Proxy33.create(Unknown Source)
          
 at org.jboss.ejb3.EJB3Deployer.create(EJB3Deployer.java:492)
          
 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 org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
          
 at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
          
 at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
          
 at org.jboss.wsf.container.jboss42.DeployerInterceptor.create(DeployerInterceptor.java:76)
          
 at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.create(SubDeployerInterceptorSupport.java:180)
          
 at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:91)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
          
 at $Proxy34.create(Unknown Source)
          
 at org.jboss.deployment.MainDeployer.create(MainDeployer.java:969)
          
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:818)
          
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
          
 at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
          
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          
 at java.lang.reflect.Method.invoke(Method.java:597)
          
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
          
 at $Proxy9.deploy(Unknown Source)
          
 at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
          
 at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
          
 at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
          
 at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
          
 at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
          
 at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
          
 at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
          
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          
 at java.lang.reflect.Method.invoke(Method.java:597)
          
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
          
 at $Proxy0.start(Unknown Source)
          
 at org.jboss.system.ServiceController.start(ServiceController.java:417)
          
 at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
          
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
          
 at java.lang.reflect.Method.invoke(Method.java:597)
          
 at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
          
 at $Proxy4.start(Unknown Source)
          
 at org.jboss.deployment.SARDeployer.start(SARDeployer.java:304)
          
 at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
          
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
          
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
          
 at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766)
          
 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 org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
          
 at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
          
 at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
          
 at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
          
 at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
          
 at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
          
 at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
          
 at $Proxy5.deploy(Unknown Source)
          
 at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
          
 at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
          
 at org.jboss.Main.boot(Main.java:200)
          
 at org.jboss.Main$1.run(Main.java:508)
          
 at java.lang.Thread.run(Thread.java:619)
          
15:15:59,130 INFO  [EJB3Deployer] Deployed: file:/F:/jboss-4.2.3.GA/server/default/deploy/ejb_03.jar/
          

           
          

               后來發(fā)現(xiàn)，原來是UserManagerBean中的@Local,@Remote必須明確寫上接口的類型，才可以。修改代碼如下：
          

          package cn.study.ejb;
          

          
          import javax.ejb.Local;
          
          import javax.ejb.Remote;
          
          import javax.ejb.Stateless;
          

          
@Stateless
          
@Remote(UserManager.          class)
          
@Local(UserManager.          class)
          
          public class UserManagerBean implements UserManager {
          

          
              public void addUser(User user) {
          
        System.out.println(user.getUsername()           + "已經(jīng)被成功保存！");
          
        user.setId(          13);
          
    }
          

          
}
          

			
			
          		
				posted @ 2008-10-01 18:53 Bobbyliao 閱讀(1118) | 評論 (2) | 編輯 收藏
			
          
		
          
	

	

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