Embeddable Entity : Persistence « EJB3 « Java
Embeddable Entity
File: EmployeeService.java
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Stateless
public class EmployeeService implements EmployeeServiceLocal, EmployeeServiceRemote {
@PersistenceContext(unitName="EmployeeService")
EntityManager em;
public EmployeeService() {
}
public void doAction(){
Employee cust = new Employee();
cust.setFirstName("B");
cust.setLastName("B");
Address address = new Address();
address.setStreet("Street");
address.setCity("Boston");
address.setState("MA");
cust.setAddress(address);
em.persist(cust);
em.flush();
System.out.println("saved");
}
}
File: EmployeeServiceLocal.java
import java.util.Collection;
import javax.ejb.Local;
@Local
public interface EmployeeServiceLocal {
public void doAction();
}
File: EmployeeServiceRemote.java
import java.util.Collection;
import javax.ejb.Remote;
@Remote
public interface EmployeeServiceRemote{
public void doAction();
}
File: Address.java
import javax.persistence.Column;
import javax.persistence.Embeddable;
@Embeddable
public class Address implements java.io.Serializable {
private String street;
private String city;
private String state;
@Column(name="STREET")
public String getStreet() { return street; }
public void setStreet(String street) { this.street = street; }
@Column(name="CITY")
public String getCity() { return city; }
public void setCity(String city) { this.city = city; }
@Column(name="STATE")
public String getState() { return state; }
public void setState(String state) { this.state = state; }
}
File: Employee.java
import javax.persistence.AttributeOverride;
import javax.persistence.AttributeOverrides;
import javax.persistence.Column;
import javax.persistence.Embedded;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
@Entity
public class Employee implements java.io.Serializable {
private long id;
private String firstName;
private String lastName;
private Address address;
@Id
@GeneratedValue
public long getId() {
return id;
}
public void setId(long 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;
}
@Embedded
@AttributeOverrides( { @AttributeOverride(name = "street", column = @Column(name = "STREET")),
@AttributeOverride(name = "city", column = @Column(name = "CITY")),
@AttributeOverride(name = "state", column = @Column(name = "STATE")) })
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
}
File: Main.java
import java.util.Collection;
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();
}
}
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
EJB-EmbeddableEntity.zip( 4,489 k)