Enterprise JavaBeans, Third Edition
By Richard Monson-Haefel

The following corrections were made to the 10/03 reprint:

Here's a key to the markup:
        [page-number]: serious technical mistake
        {page-number}: minor technical mistake
        <page-number>: important language/formatting problem
        (page-number): language change or minor formatting problem



{8}  In PersonServer source;

public int getAge()
{
   return age; 02. }

NOW READS:

public int getAge()
{
   return age;
}



{10} First code sample
PersonServer person = new PersonServer("Richard", 36);

NOW READS:
PersonServer person = new PersonServer("Richard", 34);


[40]  Cabin EJB's local home code example;
public interface CabinHomeLocal extends javax.ejb.EJBHome {

NOW READS:
public interface CabinHomeLocal extends javax.ejb.EJBLocalHome {


{68} paragraph 3
The CabinBean defines three fields: a String of type name, an int of type 
deckLevel, and an Integer of type id .

NOW READS:
The CabinBean defines three fields: name of type String, deckLevel of type int,
and id of type int.


[81]  last line;
<ejb-name>EmployeeService</ejb-name>

NOW READS:
<ejb-name>CabinEJB</ejb-name>


[90]  source code for ejbPostCreate();
public void ejbPostCreate(Integer id){

}

NOW READS:
public void ejbPostCreate(Integer id){
     // Not implemented.
}


[103]  3rd paragraph, the code segment ;
Object ref = jndiContext.lookup("CabinHome");

NOW READS:
Object ref = jndiContext.lookup("CabinHomeRemote");


{103}  3rd paragraph; 
CabinHome home = (CabinHomeRemote)

NOW READS:
CabinHomeRemote home = (CabinHomeRemote)


{109}  code example - next to last line on page;
jndiContext = new InitialContext();

NOW READS:
jndiContext = getInitialContext();


[110]  listing;code example
jndiContext = new InitialContext();

NOW READS:
jndiContext = getInitialContext();


{114}  5th line of XML;
"to the Cabin EJB"

NOW READS:
"to the TravelAgent EJB".


[114]  last two lines;
"jar cf cabin.jar"

NOW READS:
"jar cf travelagent.jar", in both command lines.


{130}  Code under the phrase "This application creates output like the
following:";

com.titan.cabin.CabinHomeRemote
com.titan.cabin.CabinRemote
com.titan.cabin.CabinPK
false

NOW READS:
com.titan.cabin.CabinHomeRemote
com.titan.cabin.CabinRemote
java.lang.Integer
false


[140]  2nd code segment;
The code of setting jndiContext:
javax.naming.Context ctx = new javax.naming.InitialContext()

NOW READS:
javax.naming.Context ctx = getInitialContext();


[174]  last sentence of next-to-last paragraph;
"...so a local interface cannot declared as a return type of a parameter 
of a remote interface."

NOW READS:
"...so a local interface cannot be declared as a return type of a parameter 
of a remote interface."


[175](line in second code listing)
AddressHomeLocal addrHome =
            (AddressHomeLocal)cntx.lookup("AddressHomeLocal");

NOW READS:
AddressHomeLocal addrHome = (AddressHomeLocal)
            cntx.lookup("java:comp/env/ejb/AddressHomeLocal");



[176]  3rd line;
public interface Customer extends javax.ejb.EJBObject {

NOW READS:
public interface CustomerRemote extends javax.ejb.EJBObject {



[177]First code listing:
Object ref = jndiEnc.lookup("SalesHomeRemote");

NOW READS:
InitialContext cntx = new InitialContext();
Object ref = cntx.lookup("java:comp/env/ejb/SalesHomeRemote");


[178]In code listing
AddressHomeLocal addrHome = (AddressHomeLocal)cntx.lookup
      ("AddressHomeLocal");

NOW READS:
AddressHomeLocal addrHome = (AddressHomeLocal)
      cntx.lookup("java:comp/env/ejb/AddressHomeLocal");


[179]  the client application code;
CustomerHome home = (CustomerHomeRemote)
    javax.rmi.ProtableRemoteObject.narrow(obj,
CustomerHomeRemote.class);

NOW READS:
CustomerHomeRemote home = (CustomerHomeRemote)
    javax.rmi.ProtableRemoteObject.narrow(obj,
CustomerHomeRemote.class);

and
Customer customer = home.create(primaryKey);

NOW READS:
CustomerRemote customer = home.create(primaryKey);


{191}  5th paragraph;
"associated with its AddressHome field"

NOW READS:
"associated with its homeAddress
field"


{194}  last paragraph;
" on the Address EJB to point back "

NOW READS:
" on the CreditCard EJB to point back "


{195}  first line of the code;
Customer customer = card.getCustomer();

NOW READS:
CustomerLocal customer = card.getCustomer();


[198]  1st paragraph code block; Methods were missing abstract modifier.
public abstract class CustomerBean implements javax.ejb.EntityBean {
    ...
    // relationship fields
    public java.util.Collection getPhoneNumbers();
    public void setPhoneNumbers(java.util.Collection phones);

    public AddressLocal getHomeAddress();()
    public void setHomeAddress(AddressLocal local);

NOW READS:
public abstract class CustomerBean implements javax.ejb.EntityBean {
    ...
    // relationship fields
    public abstract Collection getPhoneNumbers();
    public abstract void setPhoneNumbers(Collection phones);

    public abstract AddressLocal getHomeAddress();
    public abstract void setHomeAddress(AddressLocal local);
    ...


Also, on pg 198, PhoneBean class should have had an abstract modifier (second code listing on page 198)
public class PhoneBean implements javax.ejb.EntityBean {

NOW READS:
public abstract class PhoneBean implements javax.ejb.EntityBean {


{199}  code example at top of page;
    // relationship fields
    public java.util.Collection getPhoneNumbers();
    public void setPhoneNumbers(java.util.Collection phones);

NOW READS:
    // relationship fields
    public abstract java.util.Collection getPhoneNumbers();
    public abstract void setPhoneNumbers(java.util.Collection phones);


{200}  code example at top of page;
public java.util.Collection getPhoneNumbers();
public void setPhoneNumbers(java.util.Collection phones);

NOW READS:
public abstract java.util.Collection getPhoneNumbers();
public abstract void setPhoneNumbers(java.util.Collection phones);


{201}  code example;
public java.util.Collection getPhoneNumbers();
public void setPhoneNumbers(java.util.Collection phones);

NOW READS:
public abstract java.util.Collection getPhoneNumbers();
public abstract void setPhoneNumbers(java.util.Collection phones);


[207]  2nd paragraph;
" is postponed until the ejbPostCreate() method completes "

NOW READS:
" is postponed until the ejbCreate() method completes "


{216}  last code segment on page;
"ReservationHomeLocal = ... get local Reservation home"

NOW READS:
"ReservationHomeLocal resHome = ... get local Reservation home"


[232]  The code listing AND the Second to last paragraph;
public abstract String ejbSelectMostPopularCity()
   throws FinderException;

NOW READS:
public abstract String ejbSelectCity(AddressLocal addr)
   throws FinderException;

(2nd to last paragraph)
"Select methods can return the values of CMP fields.The ejbSelectMostPopularCit
y() method,for example,returns a single String value,the name of the city refer
enced by the most Address EJBs."

NOW READS:
"Select methods can return the values of CMP fields. The ejbSelectCity(AddressL
ocal addr) method,for example,returns a single String value,the name of the cit
y referenced by the Address EJB."


{236}(first paragraph at top of page)
" The AS operator is optional, but it is used in this book to help make
the EJB QL statements more clear. "

NOW READS:
" The AS operator is optional (its assumed) and is used in many, but not
all, of the examples in this chapter. "


{242}  middle of the page;
For example, the following find method, findByShip(), is declared in the
Cruise bean's local interface:

public interface CruiseLocal extends javax.ejb.EJBLocalObject {
  public Collection findByShip( ShipLocal Ship )
    throws FinderException;
}

NOW READS:
For example, the following find method, findByShip(), is declared in the
Cruise bean's local home interface:

public interface CruiseLocalHome extends javax.ejb.EJBLocalHome {
  public Collection findByShip( ShipLocal Ship )
    throws FinderException;
}


[245] << original entry said page 247 >>  Code sample for ReservationHomeLocal;
public interface ReservationHomeLocal extends EJBLocalObject {

NOW READS:
public interface ReservationHomeLocal extends EJBLocalHome {


{277} last sentence of third paragraph
"  we create a primary key and return it to the container."

NOW READS:
"  we return the primary key to the container."


{281}  second code segment;
public class ShipBean extends javax.ejb.EntityBean {

NOW READS:
public class ShipBean implements javax.ejb.EntityBean {


{289}  First code block;
If(this.name.equals(other.name) and

NOW READS:
If(this.name.equals(other.name) &&


[297]  1st paragraph;
In our example, a new record is inserted into the CUSTOMER table.

NOW READS:
In our example, a new record is inserted into the SHIP table.


[302]  1st code example;
public interface CruiseHomeLocal extends javax.ejb.EJBLocalHome {

    public CruiseLocal create(String name, ShipLocal ship);
    public void setName(String name);
    public String getName();
    public void setShip(ShipLocal ship);
    public ShipLocal getShip();

   public double totalReservationRevenue(CruiseLocal cruise);

}

NOW READS:
public interface CruiseHomeLocal extends javax.ejb.EJBLocalHome {

    public CruiseLocal create(String name, ShipLocal ship);
    public double totalReservationRevenue(CruiseLocal cruise);

}



[302]  code example; (second code listing)
public abstract class CruiseBean implements javax.ejb.EntityBean {
    public Integer ejbCreate(String name, ShipLocal ship) {
        setName(name);
    }
    ...
    public double ejbHomeTotalReservationRevenue(CruiseLocal cruise) {

        Set reservations = ejbSelectReservations(cruise);
        Iterator enum = set.iterator();
        double total = 0;
        while(enum.hasNext()) {
            ReservationLocal res = (ReservationLocal)enum.next();
            Total += res.getAmount();
        }
        return total;

    }

   public abstract ejbSelectReservations(CruiseLocal cruise);
   ...
}

NOW READS:
public abstract class CruiseBean implements javax.ejb.EntityBean {
    public Integer ejbCreate(String name, ShipLocal ship) {
        setName(name);
    }
    ...
    public double ejbHomeTotalReservationRevenue(CruiseLocal cruise) {

        Set reservations = ejbSelectReservations(cruise);
        Iterator enum = reservations.iterator();
        double total = 0;
        while(enum.hasNext()) {
            ReservationLocal res = (ReservationLocal)enum.next();
           total += res.getAmount();
        }
        return total;

    }

   public abstract ejbSelectReservations(CruiseLocal cruise);
   ...
}



{303-304}  3rd Line;
public class A_Bean extends EntityBean {
    public EntityContext context;
    public void someMethod() {
        B_Bean  b = ... // Get a remote reference to B_Bean.
        EJBObject obj = context.getEJBObject();
        A_Bean mySelf =
(A_Bean)PortableRemoteObject.narrow(obj,A_Bean.class);
        b.aMethod( mySelf );
    }
    ...
}

NOW READS:
public class A_Bean extends EntityBean {
    public EntityContext context;
    public void someMethod() {
        B_BeanRemote  b = ... // Get a remote reference to B_Bean.
        EJBObject obj = context.getEJBObject();
        A_BeanRemote mySelf =  (A_BeanRemote)
             PortableRemoteObject.narrow(obj,A_BeanRemote.class);
        b.aMethod( mySelf );
    }
    ...
}



Pg. 555-Change to Index
Entry for ejbSelectCity(AddressLocal addr)

NOW READS:
Entry for ejbSelectCity(AddressLocal addr), 232