클라이언트 클래스를 실행하는 동안 EJB 프로젝트의 CommunicationException : 다음 url에 연결할 수 없습니다. localhost : 1099

Question

EJB 3.0에 Juboss 5와 함께 helloworld 앱을 만들었습니다. 클라이언트 클래스 EjbClientApplication을 실행하려고하면 예외를 throw합니다.

자주 예외가 발생합니다. 나는 그것에 대해 많은 일을 해왔지만, EJB에 익숙하지 않아서 찾지 못했습니다.

예외 :

javax.naming.CommunicationException: Could not obtain connection to any of these urls: localhost:1099 and discovery failed with error: javax.naming.CommunicationException: Receive timed out [Root exception is java.net.SocketTimeoutException: Receive timed out] [Root exception is javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]]] at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1763) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:693) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:686) at javax.naming.InitialContext.lookup(InitialContext.java:392) at com.hex.client.EjbClientApplication.main(EjbClientApplication.java:28) Caused by: javax.naming.CommunicationException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect]] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:335) at org.jnp.interfaces.NamingContext.checkRef(NamingContext.java:1734) ... 4 more Caused by: javax.naming.ServiceUnavailableException: Failed to connect to server localhost/127.0.0.1:1099 [Root exception is java.net.ConnectException: Connection refused: connect] at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:305) ... 5 more Caused by: java.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366) at java.net.Socket.connect(Socket.java:529) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:97) at org.jnp.interfaces.TimedSocketFactory.createSocket (TimedSocketFactory.java:82) at org.jnp.interfaces.NamingContext.getServer(NamingContext.java:301) ... 5 more

JBoss 서버 포트 127.0.0.1:10001 함께하지만 난이 URL 127.0.0.1:1099이 RYT입니다 맞추려고?

서버 등록 :

• 주소 : 127.0.0.1
• 포트 : 8080
• JNDI 포트 : 1099

MyCode :이 코드는 하나의 EJB 프로젝트 구성

RemoteInterfaceClass :

package com.hex.statelessbean; 

import javax.ejb.Remote; 

@Remote 

public interface StatelessSessionBeanRemote { 

    public String displayMessage(); 
} 

StatelessBean :

/** 
* Session Bean implementation class StatelessSessionBean 
*/ 

package com.hex.statelessbean; 

import javax.ejb.Stateless; 

@Stateless 

public class StatelessSessionBean implements StatelessSessionBeanRemote { 

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

@Override 
public String displayMessage() { 
    // TODO Auto-generated method stub 
    return "Hello world"; 
} 

}

클라이언트 :

package com.hex.client; 

import java.util.Properties; 

import javax.naming.InitialContext; 
import javax.naming.NamingException; 

import com.hex.statelessbean.StatelessSessionBeanRemote; 

public class EjbClientApplication { 

public static void main(String[] args) { 
    try { 
    Properties props = new Properties(); 
    props.setProperty("java.naming.factory.initial", 
    "org.jnp.interfaces.NamingContextFactory"); 
    props.setProperty("java.naming.factory.url.pkgs", 
    "org.jboss.naming"); 
    props.setProperty("java.naming.provider.url", "localhost:1099"); 

    InitialContext ctx = new InitialContext(props); 
    StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx 
    .lookup("StatelessSessionBean/remote"); 
    System.out.println("Message from Bean :" + bean.displayMessage()); 
    } catch (NamingException e) { 
    e.printStackTrace(); 
    } 

    } 
} 

Answer 1

localhost:1099 to jnp://localhost:1099 및 org.jboss.naming to org.jboss.naming:org.jnp.interfaces을 변경하고 ejb의 이름을 확인하십시오. 주석 @RemoteBinding을 사용하면 ejb의 이름을 지정할 수 있습니다. 포트 오프셋이 있습니까?

Answer 2

Corrected Code: 

    **Interface class:** 


    package com.hex.statelessbean; 

    import javax.ejb.Remote; 

    @Remote 
    public interface StatelessSessionBeanRemote { 

     public String displayMessage(); 
    } 


    **Stateless Bean class:** 

    package com.hex.statelessbean; 

    import javax.ejb.Stateless; 

    /** 
    * Session Bean implementation class StatelessSessionBean 
    */ 
    @Stateless 
    public class StatelessSessionBean implements StatelessSessionBeanRemote { 

     /** 
     * Default constructor. 
     */ 
     public StatelessSessionBean() { 
      // TODO Auto-generated constructor stub 
      System.out.println("************* Calling from Default constructor ******************"); 
     } 

     @Override 
     public String displayMessage() { 
      // TODO Auto-generated method stub 
      System.out.println("************* Calling from displayMessage() ******************"); 
      return "Hello world"; 
     } 

    } 


**Client class:** 


package com.hex.client; 

import java.util.Properties; 

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

import com.hex.statelessbean.StatelessSessionBeanRemote; 

public class EjbClientApplication { 

    /** 
    * @param args 
    * @throws NamingException 
    */ 

    public static void main(String[] args) { 
     try { 
      Properties properties = new Properties(); 
      properties.setProperty("java.naming.factory.initial", 
        "org.jnp.interfaces.NamingContextFactory"); 
      properties.setProperty("java.naming.factory.url.pkgs", 
        "org.jboss.naming:org.jnp.interfaces"); 
      properties.setProperty("java.naming.provider.url", 
        "jnp://localhost:1099"); 
     InitialContext ctx = new InitialContext(properties); 
     StatelessSessionBeanRemote bean = (StatelessSessionBeanRemote) ctx 
     .lookup("StatelessSessionBean/remote"); 
     System.out.println("Message from Bean :" + bean.displayMessage()); 
     } catch (NamingException e) { 
     e.printStackTrace(); 
     } 
     } 
} 


**LookUp:** 

Message from Bean :Hello world