javax.ejb.EJB : EJB « javax.ejb « Java by API

1. Java by API
2. javax.ejb
3. EJB

javax.ejb.EJB

  



File: Employee.java

import javax.persistence.Entity;
import javax.persistence.EntityListeners;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.PostRemove;

@Entity

public class Employee implements java.io.Serializable {
  private int id;

  private String firstName;

  private String lastName;

  @Id
  @GeneratedValue
  public int getId() {
    return id;
  }


  @PostRemove
  public void postRemove()
  {
     System.out.println("@PostRemove");
  }

  public void setId(int id) {
    this.id = id;
  }

  public String getFirstName() {
    return firstName;
  }

  public void setFirstName(String first) {
    this.firstName = first;
  }

  public String getLastName() {
    return lastName;
  }

  public void setLastName(String last) {
    this.lastName = last;
  }
}


File: EmployeeService.java

import javax.ejb.EJB;
import javax.ejb.Stateless;

@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {

  public EmployeeService() {
  }
  @EJB private EmployeeServiceLocal processPayment;
  
  
  public void doAction() {
    System.out.println("do Action");
    
    processPayment.doAnother();
  }


  public void doAnother() {
    System.out.println("do another");
    
    
  }
}


File: EmployeeServiceLocal.java



import java.util.Collection;

import javax.ejb.Local;

@Local
public interface EmployeeServiceLocal {
    public void doAction();
    public void doAnother();

}



File: EmployeeServiceRemote.java




import java.util.Collection;

import javax.ejb.Remote;

@Remote
public interface EmployeeServiceRemote{
  public void doAction();  
  public void doAnother();
}



File: jndi.properties

java.naming.factory.initial=org.jnp.interfaces.NamingContextFactory
java.naming.factory.url.pkgs=org.jboss.naming:org.jnp.interfaces
java.naming.provider.url=localhost:1099


File: Main.java

import java.util.Date;

import javax.naming.InitialContext;


public class Main {

  public static void main(String[] a) throws Exception {

    EmployeeServiceRemote service = null;

    // Context compEnv = (Context) new InitialContext().lookup("java:comp/env");

    // service = (HelloService)new InitialContext().lookup("java:comp/env/ejb/HelloService");
    service = (EmployeeServiceRemote) new InitialContext().lookup("EmployeeService/remote");
    
    


    
    service.doAction();

  }

}





   
    
  

EJB-UseEJBToMarkEJB.zip( 4,487 k)

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