Assignment 4 due May 11. 11:59 pm. 

Resources:

• BEA WebLogic Server Documentation Center
• Sun's page on Enterprise JavaBeans(TM) Technology
• WebLogic Console:  a management console that gives you detailed information about every aspect of WebLogic. With it you can monitor all of the current connections to the server, memory being used, deploy beans, and a variety of other aspects of the WebLogic environment.
• jGuru

Basics

1. Installing WebLogic server.

   Install Weblogic under your home directory using the script :

    /stage/classes/current/51024-1/pub/weblogic_install2009.sh

2. To start your WebLogic server:

     cd $WL_HOME/samples/domains/wl_server
     startWebLogic.sh

   Note that it may take a few minutes for the server to start. Verify that your browser is running ( http://<machine>.cs.uchicago.edu:7001 ).

   To use the management console go to: http://<machine>.cs.uchicago.edu:7001/console   where <machine> is the host where you started your Weblogic server.  You'll need to enable applets for full functionality.

   Login using username = weblogic and password = weblogic.

A number of bean examples are already deployed.

IMPORTANT: To cleanly stop the server don't use Ctrl-C but:

• Go to the management console: http://<machine>.cs.uchicago.edu:7001/console 
• Choose options: Servers + examplesServer +Control + Shutdown

Deploy a Stateless EJB 

1. Take a look at the simple stateless session example in /stage/classes/current/51024-1/pub/EJB/HelloWorldExample/ .
2. Copy this example somewhere to your home directory:

   mkdir $WL_HOME/samples/server/examples/src/examples/<YOUR_DIR>
   cd $WL_HOME/samples/server/examples/src/examples/<YOUR_DIR>

   cp -r /stage/classes/current/51024-1/pub/EJB/HelloWorldExample/ .

3. Go to your bean directory:

   cd $WL_HOME/samples/server/examples/src/examples/<YOUR_DIR>/HelloWorldExample

   and use the magic Makefile to compile your bean (the building process briefly explained):

   make 

   this will create a jar file ejb_helloWorld.jar that contains all the compiled code needed for your bean and copy it to $WL_HOME/samples/domains/wl_server/autodeploy/

   It will also compile your client and put all .class file in the $WL_HOME/samples/server/examples/build/clientclasses/examples/helloworld directory  ( which  is already in your CLASSPATH).

   Then, for this example, you do not need to modify the deployment descriptors: ejb-jar.xml and weblogic-ejb-jar.xml but please take a look at them.

4. You now need to deploy the bean.  There are a number of ways to do this.

• Auto-deployment is on by default.  This means that at startup, and whenever you add a file to the applications directory  the server tries to load your bean.  You can turn auto-deployment off by starting the server in production mode with  -Dweblogic.ProductionModeEnabled=true.  The Makefile copied the bean jar file already to the applications directory so for the config you are using right now you do not have to do anyting.
• If your server is started you can use the management console to load the bean and edit deployment descriptors if you need.  (Note however that these changes are not persistent)
• Also, if your server is started, you can also use Weblogic's deployment  tool  from the command line.

Info on deploying applications.  More info on editing deployment descriptors.

5. Run your client:

   java -Djava.naming.factory.initial=weblogic.jndi.WLInitialContextFactory -Djava.naming.provider.url=t3://localhost:7001 examples.helloworld.HelloClient

   Also take a look at the server's output to see the sequence of methods called.

6. A stateful  session example is available here: 

/stage/classes/current/51024-1/pub/EJB/Count

Assignment 4 (due May 11, 11:59 pm). Create and deploy your own Stateless EJB

Now that you  have successfully deployed your first EJB, the next step is to create a bean yourself.  Implement and deploy the calculator from Lab 1 and 4 as an EJB.

Submit your code in a gzipped tarball by the due date to the TAs (sravana@cs and soner@cs). Use the structure from milestone 1.