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 () ;
}
}
EJB-MarkContainerManagedTransactionWithRequired.zip( 4,489 k)
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