EJB 를 한번 해보자

EJB JAR 로 만들 프로젝트

package com.j2eearchitect.helloworld;

import javax.ejb.Remote;

@Remote // proxy 생성

public interface HelloWorld {

String sayHello(String name);

}

===================================

package com.j2eearchitect.helloworld;

import java.io.Serializable;

import javax.ejb.Stateless;

import weblogic.javaee.JNDIName;

@Stateless //업무로직은 여기에

@JNDIName("helloWorld")

public class HelloWorldBean implements HelloWorld {

public String sayHello(String name) {

return "Hello " + name;

}

}

에러가 날수도 있다.

클래스 패스에서 웹로직.JAR를 추가하고 JRE , JDK를 확인하자

===================EJB JAR를 이식받을 프로젝트=================

package com.j2eearchitect.ejb3.util;

import javax.naming.Context;

import javax.naming.InitialContext;

import javax.naming.NamingException;

import javax.sql.DataSource;

import java.sql.Connection;

import java.util.Properties;

public class JNDIHelper {

public static Context getJNDIContext() {

try {

java.util.Properties p = new java.util.Properties();

  p.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");

  p.put(Context.PROVIDER_URL, "t3://localhost:7001");

return new InitialContext(p);

} catch (NamingException e) {

e.printStackTrace();

}

return null;

}

public static Context getJNDIContext(String user, String password) {

try {

Properties props = new Properties();

props.put(Context.SECURITY_PRINCIPAL, user);

props.put(Context.SECURITY_CREDENTIALS, password);

props.put(InitialContext.INITIAL_CONTEXT_FACTORY, "org.jnp.interfaces.NamingContextFactory");

props.put(InitialContext.PROVIDER_URL, "jnp://localhost:1099");

props.put(InitialContext.URL_PKG_PREFIXES, "org.jboss.naming:org.jnp.interfaces");

return new InitialContext(props);

} catch (NamingException e) {

e.printStackTrace();

}

return null;

}

public static Context getJNDIContext(Properties props) {

try {

return new InitialContext(props);

} catch (NamingException e) {

e.printStackTrace();

}

return null;

}

}

==========================================

package com.j2eearchitect.helloworld;

import javax.naming.Context;

import javax.rmi.PortableRemoteObject;

import com.j2eearchitect.ejb3.util.JNDIHelper;

public class HelloWorldClient {

public static void main(String[] args) {

Context ctx = JNDIHelper.getJNDIContext();

try {

HelloWorld hello =  (HelloWorld) ctx.lookup("helloWorld");

System.out.println(hello.sayHello("EJB 3.0"));

} catch(Exception e) {

e.printStackTrace();

}

}

}

ejb 는 배포를 해서 서버 구동을 해야한다.

자세한 메소드 , 클래스 설명은 공부를 좀더 하고 달겠다