Source Code : Container Managed Transaction: Required

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Container Managed Transaction: Required

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: EmployeeBean.java



import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Stateless
public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {
  @PersistenceContext(unitName = "EmployeeService")
  private EntityManager em;


  public EmployeeBean() {
  }

  @TransactionAttribute(TransactionAttributeType.REQUIRED)
  public void doAction() {
    Employee emp = new Employee();
    emp.setFirstName("first");
    em.persist(emp);

  }
  public <T> T mergeEntity(T entity) {
    return em.merge(entity);
  }

  public <T> T persistEntity(T entity) {
    em.persist(entity);
    return entity;
  }

  public <T> T refreshEntity(T entity) {
    em.refresh(entity);
    return entity;
  }

  public void removeEntity(Object entity) {
    em.remove(em.merge(entity));
  }
}


File: EmployeeServiceLocal.java



import javax.ejb.Local;

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

  <T> T mergeEntity(T entity);

  <T> T persistEntity(T entity);

  <T> T refreshEntity(T entity);

  void removeEntity(Object entity);

}


File: EmployeeServiceRemote.java

import javax.ejb.Remote;


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

  <T> T mergeEntity(T entity);

  <T> T persistEntity(T entity);

  <T> T refreshEntity(T entity);

  void removeEntity(Object entity);



}


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 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("EmployeeBean/remote");


    service.doAction();

  }

}




           
       

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