Errata

"Copy the Cabin bean's deployment descriptor into the same directory as the
class files for the Cabin bean files (...) and save it as ejb-jar.xml."

This is a contradiction to p. 91, paragraph 1, where is written:

"... this ejb-jar.xml file must be in the JAR as META-INF/ejb-jar.xml in
order for it to be found."

The META-INF directory has to be put in the directory dev, otherwise the
jar-command on page 100 (jar cf cabin.jar com/titan/cabin/*.class
META-INF/ejb-jar.xml) makes no sense.

the tree is missing CabinBean.java (not sure if this is an error or not)

Performing a lookup refer to the remote interface. This means that the
following line should be changed from:

Object ref = jndiContext.lookup("CruiseHome");

to:

Object ref = jndiContext.lookup("com/titan/cabin/Cabin");

including the specific package path for the interface.

As written, this code did not compile. I had to add

import javax.rmi.PortableRemoteObject;

at the top. Ditto for the definition of Client_2 on page 109.

I had to change this line:

Object ref = jndiContext.lookup("CabinHome");

to:

Object ref = jndiContext.lookup("CabinBean");

The Client_1 application was throwing a NamingException because it couldn't
find anything bound to the name "CabinHome".

If this is an error, then it needs to be fixed in the third code segment on
page 106 as well.

dev % jar cf cabin.jar com/titan/tralvelagent/*.class M...

should read:

dev % jar cf TravelAgent.jar com/titan/travelagent/*.class
com/titan/travelagent/M...

Same with the line below.

1.
"Any class that implements the EJBMetadata interface must be serializable..."

and must be a valid RMI/IDL value type.

2.
code listing of definition for EJBMetaData interface
1. interfaces do not use abstract keyword
2. EJBMetaData interface also has method: boolean isStatelessSession

Figure 5-4 shows javax.ejb.EJBObject extending javax.rmi.Remote.
Actually, Remote is in the package java.rmi.

Cabin cabin_2 = CabinHome.findByPrimaryKey(primaryKey);

should be:

Cabin cabin_2 = home.findByPrimaryKey(primaryKey);

In the ejbCreate() method definition, the java.lang.Object should be the
argument of the method and not the return type.

The line:

PortableRemoteObjectnarrow(ref, ShipHome.class);

should read:

PortableRemoteObject.narrow(ref, ShipHome.class);

In ejbLoad below the: "if (result.next())) {", the assignment for id is:
"id = id"

it should be:

"id = pk.id".

Should be:

public class ShipBean implements javax.ejb.EntityBean {

public ShipPK ejbFindByPrimaryKey(ShipPK primaryKey)
throws FinderException {}
public Enumeration ejbFindByCapacity(int capacity)
throws FinderException {}
}

In particular: The class should implement the interface, not extend
it. The finder methods should not throw RemoteException for EJB
1.1. RemoteException should only be thrown for EJB 1.0 so this should be
documented after the code block or included as an additional code block.

Basically this is an errata to an existing {222} errata

As of March 31st/2001 the dowloaded example code no longer has a EJB1.0
Client.java in the EJB 1.1 directories.

Now 3 Client.java files are completely missing from the following
3 EJB directories:

chapter7EJB11com itancruise
chapter7EJB11com itancustomer
chapter7EJB11com itan eservation

The solution would be to copy the Client.java files from
the corresponding EJB10 directories and make the EJB 1.1
'narrow'ing modification necessary to ~cast~ the 1.1 way.
See the {222} errata for an example.

States that ReservationBean throws a DoubleBookedException (which is a custom e
xception), but in the downloadable code, this exception does not exist and is n
ot thrown.

UserTransaction tran = ...
...
utx.begin();

... Should read:

UserTransaction utx = ...
...
utx.begin();

The line :

public abstract void begin(){
throws IllegalStateException, SystemException;

should read:

public abstract void begin(){
throws NotSupportedException, SystemException;

Incorrect code:

// Address as a persistent field
public class Person extends javax.ejb.EntityBean {

Should be:

// Address as a persistent field
public class Person implements javax.ejb.EntityBean {

The same error is repeated at the top of page 330. In keeping with the
naming convention used throughout the rest of the book, _Person_ should
also be changed to _PersonBean_.

Toplink is nolonger from Object People. It is now from a company called
WebGain. Check out www.webgain.com for more info.

It says:

"The env-ref element is used..."

but it must be:

"The ejb-ref element is used..."

Text reads "javax.net.URL"
Should read "java.net.URL" (there is no javax.net package)