Red Hat Application Server, Руководство пользователя

Страница: 24 / 296

16 Chapter 2. Getting Started with JOnAS
Rollback the transaction
Request outside any transaction
ClientOp OK. Exiting.
5. Before ending this session, be sure to stop the JOnAS server:
service jonas stop
These instructions are also located in the
README
file in the working directory.
2.1.4. Understanding Why This Works
•
This example demonstrates that the
CLASSPATH
is correctly set because, when the JOnAS server is
launched, the
jonas
script calls the JOnAS
bootstrap
class.
The
jclient
script is being used to run the client. Note that the bean classes were found in
$JONAS_ROOT/examples/classes
. If this had not been the case, it would have been necessary
to call the
jclient
script with the
-cp "$JONAS_ROOT/ejbjars/sb.jar"
option.
•
The client has succeeded in contacting the JOnAS server because the client has a distributed refer-
ence that was previously registered in the naming service. To do this, server and client use JNDI
(the Java Naming and Directory Interface). The
carol.properties
file (which contains the JNDI
configuration) is located in the
$JONAS_ROOT/conf
directory.
This
carol.properties
has the JNDI properties set to the default values.
With these default values, the
registry
runs on
localhost
on the default port (1099 for
RMI/JRMP).
By default, the
registry
is launched in the same JVM as the JOnAS Server.
2.2. More Complex Examples
2.2.1. Other JOnAS Examples
The following examples are located under
$JONAS_ROOT/examples/src
:
•
The eb example ($JONAS_ROOT/examples/src/eb/) uses Entity beans. (See Section 2.2.2 An Ex-
ample With Database Access .)
The two beans share the same interface (
Account
): one uses bean-managed persistence (explicit
persistence), the other uses container-managed persistence (implicit persistence).
This is a good example for understanding what must be done, or not done, for persistence, based
on the chosen mode of persistence. It provides both a CMP 1.1 and a CMP 2.0 implementation.
•
The lb example ($JONAS_ROOT/examples/src/lb/) uses Entity beans with local interfaces.
A Session Bean,
Manager
, locally manages an Entity Bean,
Manac
, which represents an account.
This is a good example for understanding what must be done for a local client collocated with an
Entity Bean providing local interfaces.
•
The
jms
directory ($JONAS_ROOT/examples/src/jms/) contains a stateful Session Bean with
methods performing JMS operations and a pure JMS client message receptor.
A complete description of this example is in Section 26.6
A JMS EJB Example .
•
The
mailsb
directory ($JONAS_ROOT/examples/src/mailsb/) contains a
SessionMailer
and
MimePartDSMailer Stateful Session beans
with methods providing a way for building and
sending mail.