Red Hat Application Server, Manual

Page: 277 / 296

Chapter 39.
How to Migrate the New World Cruises
Application to JOnAS
This section describes the modifications required to migrate the J2EE application “New World Cruise”
to a JOnAS server.
“New World Cruise” is a sample application that comes with Sun ONE Application Server. (See
http://developers.sun.com/sw/building/tech_articles/jaxrpc/synopsis.html.)
39.1. JOnAS Configuration
The first step is to configure the database used for this application. Copy the file
db .properties
to
the directory
$JONAS_BASE/conf
. Edit this file to complete the database connection.
Then, modify the JOnAS DBM database service configurations in the file
$JONAS_BASE/conf/jonas.properties
, to specify the file containing the database connection.
39.1.1. New World Cruise Application
39.1.1.1. EJB Modification Code
To be EJB2.0-compliant, add the exceptions RemoveException and CreateException for EJB’s meth-
ods ejbRemove and ejbCreate.
Additionally, the GlueBean class uses a local object in GlueBean constructor. However, it must use a
remote object because it is a class calling an EJB. Therefore, modify the comment in this class with
the following:
// If using the remote interface, the call would look like this
cruiseManagerHome = (CruiseManagerHome)
javax.rmi.PortableRemoteObject.narrow(result, CruiseManagerHome.class);
// Using the local interface, the call looks like this
//cruiseManagerHome = (CruiseManagerHome) result;
39.1.2. EJB’s Deployment Descriptor
There are three EJBs, thus there must be three
ejb-jar.xml
files that correspond to the EJB’s de-
ployment descriptors and three
jonas-ejb-jar.xml
files that correspond to the JOnAS deployment
descriptors.
First, rename the files
ejb_name .ejbdd
with
ejb_name .xml
(these files contain the EJB deploy-
ment descriptors).
Create the three
jonas- ejb_name .xml
files corresponding to the EJBs.
For the two entity Beans (Cruise and CruiseManager), describe the mapping between:
•
The EJB name and JNDI name (JNDI name=ejb/
ejb name
)
•
The JDBC and the table name
•
The EJB field and the table field, (the version of CMP is not specified in ejb-jar and JOnAS by
default uses CMP1.1).