EJB 3的JNDI初始上下文和查找問題

Question

此問題非常常見。我看過一些文章，但找不到問題。我想在EJB 3.0中創建一個簡單的HelloWorld程序，eclipse luna，jboss 7.1.1 Final。

這裏是我的豆：

package com.tcs.HelloWorldPack; 

import javax.ejb.Stateless; 

/** 
* Session Bean implementation class HelloWorld 
*/ 
@Stateless(mappedName="HelloWorldBean") 
public class HelloWorld implements HelloWorldRemote { 

    /** 
    * Default constructor. 
    */ 
    public HelloWorld() { 
     // TODO Auto-generated constructor stub 

    } 

    @Override 
    public void displayMsg() { 
     // TODO Auto-generated method stub 
     System.out.println("Hello World!!"); 

    } 

} 

這裏是我的遠程接口：

package com.tcs.HelloWorldPack; 

import javax.ejb.Local; 
//import javax.ejb.Remote; 
import javax.ejb.Remote; 

@Remote 
public interface HelloWorldRemote { 

    void displayMsg(); 
} 

這裏是我的客戶端，在同一臺機器上運行：

package com.tcs.HelloWorldClient; 

import java.util.Hashtable; 
import java.util.Properties; 

import com.tcs.HelloWorldPack.*; 

import javax.ejb.EJB; 
import javax.naming.Context; 
import javax.naming.InitialContext; 
import javax.naming.NamingException; 

public class HelloWorldClient { 


    public static void main(String[] args) throws NamingException { 


     final Hashtable jndiProperties = new Hashtable(); 
     jndiProperties.put(Context.URL_PKG_PREFIXES, "org.jboss.ejb.client.naming"); 
     jndiProperties.put(javax.naming.Context.SECURITY_PRINCIPAL, "myUser"); 
     jndiProperties.put(javax.naming.Context.SECURITY_CREDENTIALS, "myPass"); 
//  jndiProperties.put(javax.naming.Context.PROVIDER_URL, "jnp://localhost:1099"); 
//  jndiProperties.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory"); 
     jndiProperties.put("jboss.naming.client.ejb.context", true); 

     final Context context = new InitialContext(jndiProperties); 

     final String appName= "HeloWorldEJBEAR"; 
     final String moduleName= ""; 
     final String distinctName =""; 
     final String beanName = "HeloWorld"; 
     final String viewClassName = "com.tcs.HelloWorldPack.HelloWorldRemote"; 
     HelloWorldRemote hello = (HelloWorldRemote) context.lookup("ejb:" + appName + "/" + moduleName + "/" + distinctName + "/" + beanName + "!" + viewClassName); 

     hello.displayMsg(); 


    } 

} 

這是我的jboss-ejb-client.properties文件：

remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false 

remote.connections=default 

remote.connection.default.host=localhost 
remote.connection.default.port = 4447 
remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false 

remote.connection.default.username=myUser 
remote.connection.default.password=myPass 

我已經把屬性文件在classpath also.But當我試圖運行它發生這種情況：

Exception in thread "main" java.lang.IllegalStateException: No EJB receiver available for handling [appName:HeloWorldEJBEAR,modulename:,distinctname:] combination for invocation context org.jboss.ejb.client.EJBClientInvocationContext@413ded77 
    at org.jboss.ejb.client.EJBClientContext.requireEJBReceiver(EJBClientContext.java:584) 
    at org.jboss.ejb.client.ReceiverInterceptor.handleInvocation(ReceiverInterceptor.java:119) 
    at org.jboss.ejb.client.EJBClientInvocationContext.sendRequest(EJBClientInvocationContext.java:181) 
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:136) 
    at org.jboss.ejb.client.EJBInvocationHandler.doInvoke(EJBInvocationHandler.java:121) 
    at org.jboss.ejb.client.EJBInvocationHandler.invoke(EJBInvocationHandler.java:104) 
    at com.sun.proxy.$Proxy0.displayMsg(Unknown Source) 
    at com.tcs.HelloWorldClient.HelloWorldClient.main(HelloWorldClient.java:71) 
Jan 08, 2015 3:34:44 PM org.jboss.ejb.client.remoting.ChannelAssociation$ResponseReceiver handleEnd 
INFO: Channel Channel ID de8d2aa6 (outbound) of Remoting connection 44477156 to localhost/127.0.0.1:4447 can no longer process messages 

我還上傳了我的目錄結構。我對EJB概念很陌生。請幫我找出問題所在。提前致謝。

Answer 1

您的模塊名稱是一個空字符串，但模塊名稱不能是JNDI名稱中的空字符串。 外觀here

您必須設置您的ejb模塊.jar的名稱，不帶.jar後綴。

final String moduleName = "HeloWorldEJB";

那麼它應該工作。