Java Tutorial/EJB3/Annotation

Create Your Own Annotation For EJB

File: EmployeeBean.java

   <source lang="java">

import javax.ejb.Stateless; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.transaction.SystemException; import javax.transaction.TransactionManager; @Stateless public class EmployeeBean implements EmployeeServiceLocal, EmployeeServiceRemote {

 @PersistenceContext(unitName="EmployeeService") private EntityManager manager;
 
 @JndiInjected("java:/TransactionManager")
 TransactionManager tm;
 public void doAction(){
   try {
     System.out.println("Is there a transaction: " + (tm.getTransaction() != null));
   } catch (SystemException e) {
     e.printStackTrace();
   }
   Customer cust = new Customer();
   cust.setLastName("Bond");
   cust.setSsn(1L);
   manager.persist(cust);
   
   System.out.println("Saved");
   
   cust = manager.find(Customer.class,1L);
   System.out.println(cust.getLastName());
   
   cust.setLastName("new name");
   
   manager.persist(cust);
   
   cust = manager.find(Customer.class,1L);
   System.out.println(cust.getLastName());
   
   manager.remove(cust);
   
   
   
 }

}</source>