How to create Rows in Database with EJB3.0 Entities - Relationship Problem

Question

Hi,
I don't have much experience in writing Entity Java Beans, so if some questions are "dummy-questions", I apologize for that.
Actual state: I have implemented Entity Java Beans with relationships between them. I can deploy them to JBOSS AS and everything is fine. Then, I want to implement a small client to fill the database with some values to check if my Beans are correct.
Problem: I have three Beans, that have relationships.
Entity Flight, Entity FlightSeat and Entity Address
Flight has a OneToMany relationship with FlightSeat and two ManyToOne relationships with Address (for start- and destinationaddress of the flight)
No, I want to create Values in the database with the Entities, but I don't know how I have to conside the relationships. How can I add a Flight row to the database? Do I have to specifiy the start- and destinationaddress, when saving the entity Flight with Entitymanager.persist()?? Maybe you know a good Tutorial where I can see, how it is possible to fill the tables?
Here my Implementation:
Flight.java:
package at.ac.tuwien.inetappl.entity;
import java.io.Serializable;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;
import javax.persistence.FetchType;
import java.util.Date;
import java.util.Collection;
@Entity
@Table (name="REL_FLIGHT")
public class Flight implements Serializable{
     private long flightid;
     private String company;
     private Date duration;
     private Address startaddress;
     private Address destinationaddress;
     private Collection<FlightSeat> seats;
     public Flight() {}
     public Flight(String company, Date duration, Address startaddress, Address destinationaddress)
          this.company=company;
          this.duration=duration;
          this.startaddress=startaddress;
          this.destinationaddress=destinationaddress;
     @Id @GeneratedValue(strategy=GenerationType.AUTO)
     @Column(name="FLIGHT_ID")
     public long getId()
          return this.flightid;
     public void setId(long flightid)
          this.flightid = flightid;
     @Column(name="COMPANY")
     public String getCompany()
          return this.company;
     public void setCompany(String company)
          this.company=company;          
     @Column(name="DURATION")
     public Date getDuration()
          return this.duration;
     public void setDuration(Date duration)
          this.duration=duration;
     @ManyToOne (optional=false)
     @JoinColumn(name = "START_ADDRESS_ID")
     public Address getStartAddress()
          return this.startaddress;
     public void setStartAddress(Address startaddress)
          this.startaddress=startaddress;
     @ManyToOne (optional=false)
     @JoinColumn(name = "DESTINATION_ADDRESS_ID")
     public Address getDestinationAddress()
          return this.destinationaddress;
     public void setDestinationAddress(Address destinationaddress)
          this.destinationaddress=destinationaddress;
     @OneToMany(cascade = CascadeType.ALL, fetch=FetchType.EAGER, mappedBy="flight")
     //@JoinColumn(name= "SEAT_ID")
     public Collection<FlightSeat> getSeats()
          return this.seats;
     public void setSeats(Collection<FlightSeat> seats)
          this.seats=seats;
}Address.java:
package at.ac.tuwien.inetappl.entity;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import javax.persistence.Column;
@Entity
@Table (name="REL_ADDRESS")
public class Address implements Serializable{
     private String land;
     private String city;
     private String street;
     private int streetnumber;
     private int postalcode;
     private long addressid;
     public Address() {}
     public Address (String land, String city, String street,
               int streetnumber, int postalcode) {
          this.land=land;
          this.city=city;
          this.street=street;
          this.streetnumber=streetnumber;
          this.postalcode=postalcode;          
     @Id @GeneratedValue(strategy=GenerationType.AUTO)
     @Column(name="ADDRESS_ID")
     public long getId()
          return this.addressid;
     public void setId(long addressid)
          this.addressid = addressid;
     @Column(name="LAND")
     public String getLand()
          return this.land;
     public void setLand(String land)
          this.land=land;
     @Column(name="CITY")
     public String getCity()
          return this.city;
     public void setCity(String city)
          this.city=city;          
     @Column(name="STREET")
     public String getStreet()
          return this.street;
     public void setStreet(String street)
          this.street=street;
     @Column(name="STREETNUMBER")
     public int getStreetNumber()
          return this.streetnumber;
     public void setStreetNumber(int streetnumber)
          this.streetnumber=streetnumber;
     @Column(name="POSTALCODE")
     public int getPostalCode()
          return this.postalcode;
     public void setPostalCode(int postalcode)
          this.postalcode=postalcode;
/code]
FlightSeat.java package at.ac.tuwien.inetappl.entity;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Entity;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
@Entity
@Table (name="REL_FLIGHTSEAT")
public class FlightSeat implements Serializable {
     private long seatid;
     private String category;
     private int price;
     private boolean available;
     private Flight flight;
     public FlightSeat() {}
     public FlightSeat(String category, int price, boolean available)
          this.category=category;
          this.price=price;
          this.available=available;
     @Id @GeneratedValue(strategy=GenerationType.AUTO)
     @Column(name="SEAT_ID")
     public long getId()
          return this.seatid;
     public void setId(long seatid)
          this.seatid = seatid;
     @Column(name="CATEGORY")
     public String getCategory()
          return this.category;
     public void setCategory(String category)
          this.category=category;
     @Column(name="PRICE")
     public int getPrice()
          return this.price;
     public void setPrice(int price)
          this.price=price;
     @Column(name="AVAILABLE")
     public boolean getAvailability()
          return this.available;
     public void setAvailability(boolean available)
          this.available=available;
     @ManyToOne()
     @JoinColumn(name="FLIGHT_ID")
     public Flight getFlight()
          return this.flight;
     public void setFlight(Flight flight)
          this.flight=flight;
FlightBean.java - implementing business methods
package at.ac.tuwien.inetappl.bean;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.ejb.Remote;
import at.ac.tuwien.inetappl.entity.Flight;
import at.ac.tuwien.inetappl.entity.Address;
import at.ac.tuwien.inetappl.entity.FlightSeat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.io.Serializable;
import javax.persistence.Query;
@Stateless
@Remote(FlightInterface.class)
public class FlightBean implements FlightInterface, java.io.Serializable {
     //private Collection<Flight> flight;
     @PersistenceContext
     protected EntityManager em;
     /* CRUD METHODS FOR FLIGHT */
     /* CREATE FLIGHT */
     public void createFlight(String company, Date duration, Address start, Address dest)
          Flight flight = new Flight();
          flight.setCompany(company);
          flight.setDuration(duration);
          flight.setStartAddress(start);
          flight.setDestinationAddress(dest);
          em.persist(flight);     
     public void updateFlight(Flight flight)
          em.persist(flight);
     /* DELETE FLIGHT*/
     public void deleteFlight(long id)
           Query q = em.createQuery("DELETE FROM FLIGHT f WHERE f.FLIGHT_ID = :id");
           q.setParameter ("id", new Long(id));
     /* SEARCH METHODS FOR FLIGHT */
     public Collection<Flight> getFlights()
          return em.createQuery("from FLIGHT f").getResultList();
     public Flight getFlight(long id) {
          Flight flight = em.find(Flight.class, new Long(id));
          return flight;
     public String getCompany(long id) {
          Flight flight = em.find(Flight.class, new Long(id));
          String company = flight.getCompany();
          return company;
}Thanks to all!! I hope somebody can help.
Greetings,
RedBaron

Answer 1

On Wed, 16 May 2007 20:41:21 +0000 (UTC), "bsoliman"
<[email protected]> wrote:
>You need to set up virtual directories instead?see
>
http://support.microsoft.com/kb/172138
The actual directories can be wherever
>is most convenient for you?I keep mine in a folder called
/clients outside my
>local web root.
>
> Bev
Understand that virtual directories are not exactly the same
thing as
virtual hosts.
A virtual directory will not act as the root for a site. IIS
will
still think that your site root is the overall IIS site root.
There are some utilities that allow you to switch the folder
that IIS
uses as the root. This one works pretty well:
http://jetstat.com/iisadmin/
Win
Win Day, Wild Rose Websites
http://www.wildrosewebsites.com
[email protected]
Skype winifredday