[CONF] OpenEJB 3.0.x documentation > Getting Started

confluence Wed, 19 May 2010 13:44:25 -0700

     Getting Started
    Page edited by             David Blevins
    
        

                         Changes (12)
                                 
    

            
            ...

                    Ejb(ejb-name=GreetingBean, id=GreetingBean) 
 

            Jndi(name=GreetingBeanBusinessRemote) 

            {noformat} 

            {color:#330000}{*}Notice the Jndi(name=GreetingBeanBusinessRemote) information. Keep this handy as this is the JNDI name of the bean which the client will use for lookup{*}{color} 

             
h2. &nbsp;6. Write the Client 

            ...

            package com.myclient; 
 

            import java.util.Properties; com.myejbs.Greeting; 

             
import javax.naming.InitialContext; 

            import javax.naming.NamingException; java.util.Properties; 

            import javax.rmi.PortableRemoteObject; 

             

            import com.myejbs.Greeting; 
 

            public class Client { 

                public static void main(String[] args) { 

             

                    try { 

            Properties p = new Properties();p.put("java.naming.factory.initial", "org.openejb.client.RemoteInitialContextFactory"); 

                        p.put("java.naming.factory.initial", "org.openejb.client.RemoteInitialContextFactory"); 

            p.put("java.naming.provider.url", "ejbd://127.0.0.1:4201"); 

            InitialContext ctx = new InitialContext( p ); InitialContext(p); 

            			Object object = ctx.lookup("GreetingBeanBusinessRemote"); 

            Greeting greeter = (Greeting) PortableRemoteObject.narrow(object, Greeting.class); ctx.lookup("GreetingBeanRemote"); 

                        String message = greeter.greet();
            System.out.println(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    } 

            } 
{code} 

            ...

        
                            Full Content
                    
         The following instructions are written using Eclipse 3.2. We will refer to the install location of OpenEJB as OPENEJB_HOME

Here are some basic steps you need to perform to get started with OpenEJB

	Download and install OpenEJB
	Setup your development environment
	Write an EJB
	Write an EJB client
	Start the server
	Deploy the EJB
	Run the client
	Stop the server






 1. Download and Install OpenEJB

Follow these instructions

 2. Setup your development environment


 Eclipse


	Open eclipse and create a new java project. Name it EJBProject
	Add the following jars to the build path of your project
	
		OPENEJB_HOME/lib/geronimo-ejb_3.0_spec-1.0.jar
	
	
	Now create another project named EJBClient. This is where we will write a test client
	Add the following jars to the build path of this project
	
		OPENEJB_HOME/lib/openejb-client-3.0.0-SNAPSHOT.jar
	
	
	Add the EJBProject to the classpath of the EJBClient project



 3. Start the Server

Open the command prompt and run the following command:

d:\openejb-3.0.0-SNAPSHOT\bin\openejb start


You will get the following message on the console:

D:\openejb-3.0.0-SNAPSHOT>bin\openejb start
Apache OpenEJB 3.0.0-SNAPSHOT    build: 20070830-07:53
http://openejb.apache.org/
OpenEJB ready.
[OPENEJB:init] OpenEJB Remote Server
  ** Starting Services **
  NAME                 IP              PORT
  httpejbd             0.0.0.0         4204
  admin thread         0.0.0.0         4200
  ejbd                 0.0.0.0         4201
  hsql                 0.0.0.0         9001
  telnet               0.0.0.0         4202
-------
Ready!


 4. Write an EJB

In the EJB project create a new interface named Greeting

package com.myejbs;

import javax.ejb.Remote;

@Remote
public interface Greeting {
  public String greet();
}


Now create a new class named GreetingBean which implements the above interface (shown below)

package com.myejbs;

import javax.ejb.Stateless;

@Stateless
public class GreetingBean implements Greeting {

	public String greet() {
		return "My First Remote Stateless Session Bean";
	}

}



  5. Deploy the EJB


	Export the EJBProject as a jar file. Name it greeting.jar and put it in the OPENEJB_HOME/apps directory.
	Open the command prompt and type in the following command:




d:\openejb-3.0.0-SNAPSHOT > bin\openejb deploy apps\greeting.jar


This should give you the following output:

D:\openejb-3.0.0-SNAPSHOT>bin\openejb deploy apps\greeting.jar

Application deployed successfully at \{0\}

App(id=D:\openejb-3.0.0-SNAPSHOT\apps\greeting.jar)

    EjbJar(id=greeting.jar, path=D:\openejb-3.0.0-SNAPSHOT\apps\greeting.jar)

        Ejb(ejb-name=GreetingBean, id=GreetingBean)

            Jndi(name=GreetingBeanRemote)


Notice the Jndi(name=GreetingBeanRemote) information. Keep this handy as this is the JNDI name of the bean which the client will use for lookup

 6. Write the Client

In the EJBClient project, create a class named Client (shown below)

package com.myclient;

import com.myejbs.Greeting;

import javax.naming.InitialContext;
import java.util.Properties;

public class Client {
    public static void main(String[] args) {

        try {
            Properties p = new Properties();
            p.put("java.naming.factory.initial", "org.openejb.client.RemoteInitialContextFactory");
            p.put("java.naming.provider.url", "ejbd://127.0.0.1:4201");
            InitialContext ctx = new InitialContext(p);
            Greeting greeter = (Greeting) ctx.lookup("GreetingBeanRemote");
            String message = greeter.greet();
            System.out.println(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}



 7. Run the Client

Open Client.java in eclipse and run it as a java application. You should see the following message in the console view:

My First Remote Stateless Session Bean



 8. Stop the server

There are two ways to stop the server:

	You can press Ctrl+c on the command prompt to stop the server
	On the command prompt type in the following command:

D:\openejb-3.0.0-SNAPSHOT>bin\openejb stop




    
        
        
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 ...
         Ejb(ejb-name=GreetingBean, id=GreetingBean)
 Jndi(name=GreetingBeanBusinessRemote)
 {noformat}
 {color:#330000}{*}Notice the Jndi(name=GreetingBeanBusinessRemote) information. Keep this handy as this is the JNDI name of the bean which the client will use for lookup{*}{color}
 h2. &nbsp;6. Write the Client
 ...
 package com.myclient;
 import java.util.Properties; com.myejbs.Greeting;
 import javax.naming.InitialContext;
 import javax.naming.NamingException; java.util.Properties;
-import javax.rmi.PortableRemoteObject;
-import com.myejbs.Greeting;
 public class Client {
     public static void main(String[] args) {
         try {
 Properties p = new Properties();p.put("java.naming.factory.initial", "org.openejb.client.RemoteInitialContextFactory");
+            p.put("java.naming.factory.initial", "org.openejb.client.RemoteInitialContextFactory");
 p.put("java.naming.provider.url", "ejbd://127.0.0.1:4201");
 InitialContext ctx = new InitialContext( p ); InitialContext(p);
-			Object object = ctx.lookup("GreetingBeanBusinessRemote");
 Greeting greeter = (Greeting) PortableRemoteObject.narrow(object, Greeting.class); ctx.lookup("GreetingBeanRemote");
             String message = greeter.greet();
            System.out.println(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
 } 
{code}
 ...

[CONF] OpenEJB 3.0.x documentation > Getting Started

Getting Started

Page edited by David Blevins

Changes (12)

Full Content

The following instructions are written using Eclipse 3.2. We will refer to the install location of OpenEJB as OPENEJB_HOME

1. Download and Install OpenEJB

2. Setup your development environment

Eclipse

3. Start the Server

4. Write an EJB

5. Deploy the EJB

6. Write the Client

7. Run the Client

8. Stop the server

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