Post Subject : Tutorial on J2EE using JBOSS-4.x, Eclipse-3.x, Lomboz-3.x and
PostgreSQL-8.x on Windows XP
Ref. 1 : Tutorial for building J2EE Applications using JBOSS and ECLIPSE
http://www.tusc.com.au/tutorial/html/chap7.html (Chapter 7 : Message
Driven Bean)
Ref. 2 : Tutorial on J2EE using JBOSS, ECLIPSE and Lomboz (Forum on Ref. 1)
http://www.jboss.org/index.html?module=bb&op=viewtopic&t=36910
Ref. 3 : Environment in use ;
- Windows XP SP2
- J2SDK 1.4.2_08
- Eclipse 3.0.2
- JBoss 4.0.2
- Lomboz 3.0.1 + emf-sdo-runtime-2.0.0
- PostgreSQL 8.0.3 (= DefaultDS)
Followings are some notes on Chapter 7 (MDB) in Ref. 1
* The notes cover a creation of RequestItemsBean.
* Task numbers are based on Ref. 1
* No change has been made to the server definition file
(jboss402postgres.server) thus far.
* Copy and paste additional files for Chapter 7 and after.
- Before start up JBoss, copy and paste three "*.xml" files below. Keep their
contents as they are.
a. "hajndi-jms-ds.xml" and "file-state-service.xml" in
/jboss-4.0.2/docs/examples/jms to "/postgres/deploy-hasingleton/jms"
b. "jbossmq-state.xml" in /jboss-4.0.2/docs/examples/jms/conf to
"/postgres/conf"
- As a result, "/postgres/deploy-hasingleton/jms" folder contains following
files.
jbossmq-httpil.sar
file-state-service.xml
hajndi-jms-ds.xml
jbossmq-destinations-service.xml
jbossmq-service.xml
jvm-il-service.xml
oil-service.xml
postgres-jdbc3-service.xml
rmi-il-service.xml
uil2-service.xml
=Note : All other settings and files are kept unchanged after Chapter 6.
For addition of "file-state-service.xml", see Step 8 (Modify the JBoss Login
Config File) in the first post of this thread.
Task 1 : Create RequestItems MDB under package au.com.tusc.mdb
- On creation of "ItemBean", check some points before proceeding further steps.
= make sure the XDoclet parts of ItemBean.java;
:
| * <!-- begin-xdoclet-definition --> * @ejb.bean name="RequestItems" *
acknowledge-mode="Auto-acknowledge"
| * destination-type="javax.jms.Queue" *
subscription-durability="NonDurable" * transaction-type="Container"
| *
| :
Task 2 : Create an Immutable Value Object named RequestItem.
- On creation of "RequestItem", confirm a point below.
:
| public class RequestItem extends java.lang.Object implements Serializable {
| :
Task 3 : Implement the onMessage method
(as per the steps in Ref. 1)
Task 4 : Deploy the RequestItems Bean
(add some deployment descriptors as per the steps in Ref. 1)
- generate EJB classes
- fix deployment descriptions, i.e. "ejb-local-ref" and "ejb/"
- confirm copy-and-paste of additional three files. (see Note above)
- start JBoss with "Run Server" menu in "Lomboz J2EE View" tag.
- if failure/error messages occur, stop JBoss and check the tables in the
database with "pgAdmin III".
- drop all of following files if exist.
hilosequences
jms_message_log
jms_reference_log
jms_transaction_log
timers
- re-start JBoss
Task 5 : Create a test client name RequestMDBClient
: (as per the steps in Ref. 1)
Task 6 : Add a method named testMDBBean
Task 7 : Run the test client and test the bean
- Messages expected in the console are;Looking up the factory
| Looking up the queue
| Creating the connection now ...
| Creating the session now ...
| Creating the sender now ...
| Setting the object in message now ...
| Sending the message
| Shutting down
| Finishedbut, they might be as follows instead, which are a summary of
"server.log".
23:37:03,906 INFO [STDOUT] Message Driven Bean got message
org.jboss.mq.SpyObjectMessage {
| Header {
| jmsDestination : QUEUE.MdbQueue
| jmsDeliveryMode : 2
| jmsExpiration : 0
| jmsPriority : 4
| jmsMessageID : ID:9-11188462238901
| jmsTimeStamp : 1118846223890
| jmsCorrelationID: null
| jmsReplyTo : null
| jmsType : null
| jmsRedelivered : false
| jmsProperties : {}
| jmsPropReadWrite: false
| msgReadOnly : true
| producerClientId: ID:9
| }
| }
| 23:37:03,906 INFO [STDOUT] Entering RequestItemsBean.onMessage()
| 23:37:03,968 INFO [STDOUT] Entering StoreAccessBean
| 23:37:03,968 INFO [STDOUT] Leaving StoreAccessBean
| 23:37:03,968 INFO [STDOUT] Entering StoreAccessDAOImpl.loginUser()
| 23:37:03,984 INFO [STDOUT] Userid is U6
| 23:37:03,984 INFO [STDOUT] Leaving StoreAccessDAOImpl.loginUser()
| 23:37:03,984 INFO [STDOUT] Entering StoreAccessBean.getItemData()
| 23:37:03,984 INFO [STDOUT] Entering ItemBean.getItemData()
| 23:37:03,984 INFO [STDOUT] Leaving ItemBean.getItemData()
| 23:37:03,984 INFO [STDOUT] Entering ItemBean.getItemData()
| 23:37:03,984 INFO [STDOUT] Leaving ItemBean.getItemData()
| 23:37:03,984 INFO [STDOUT] Leaving StoreAccessBean.getItemsOutOfStock()
| 23:37:04,000 INFO [STDOUT] List of Out-Of-Stock Items
| 23:37:04,015 INFO [STDOUT] Entering SupplierBean.requestItem() 30
| 23:37:04,015 INFO [STDOUT] Leaving SupplierBean.requestItem()
| 23:37:04,015 INFO [STDOUT] Entering SupplierBean.requestItem() 30
| 23:37:04,015 INFO [STDOUT] Leaving SupplierBean.requestItem()
| 23:37:04,015 INFO [STDOUT] Leaving RequestItemsBean.onMessage()
- Also, the results can be checked in the database table using "pgAdmin III".
= select * from supplier
==> "S1";"U4";"SEBASTIAN";"BELLOFIORE";"10 ELIZABETH ST";"I430";0.00
=== On completion of RequestItemsBean, the contents of <message-driven> tag of
each file are as follows;
- ejb-jar.xml :
| <!-- Message Driven Beans -->
| <message-driven >
| <description><![CDATA[<!-- begin-user-doc --> You can insert your
documentation for '<em><b>RequestItemsBean</b></em>'.]]></description>
|
| <ejb-name>RequestItems</ejb-name>
|
| <ejb-class>au.com.tusc.mdb.RequestItemsBean</ejb-class>
| <transaction-type>Container</transaction-type>
| <acknowledge-mode>Auto-acknowledge</acknowledge-mode>
| <message-driven-destination>
| <destination-type>javax.jms.Queue</destination-type>
| <subscription-durability>NonDurable</subscription-durability>
| </message-driven-destination>
|
| <ejb-ref >
| <ejb-ref-name>ejb/StoreAccess</ejb-ref-name>
| <ejb-ref-type>Session</ejb-ref-type>
| <home>au.com.tusc.session.StoreAccessHome</home>
| <remote>au.com.tusc.session.StoreAccess</remote>
| <ejb-link>StoreAccess</ejb-link>
| </ejb-ref>
|
| <ejb-local-ref >
| <ejb-ref-name>ejb/SupplierLocal</ejb-ref-name>
| <ejb-ref-type>Entity</ejb-ref-type>
| <local-home>au.com.tusc.cmp.SupplierLocalHome</local-home>
| <local>au.com.tusc.cmp.SupplierLocal</local>
| <ejb-link>Supplier</ejb-link>
| </ejb-local-ref>
|
| </message-driven>
| :
- jboss.xml :
| <message-driven>
| <ejb-name>RequestItems</ejb-name>
| <destination-jndi-name>queue/MdbQueue</destination-jndi-name>
| <ejb-local-ref>
| <ejb-ref-name>ejb/SupplierLocal</ejb-ref-name>
| <jndi-name>SupplierLocal</jndi-name>
| </ejb-local-ref>
| <ejb-ref>
| <ejb-ref-name>ejb/StoreAccess</ejb-ref-name>
| <jndi-name>StoreAccessBean</jndi-name>
| </ejb-ref>
| </message-driven>
| :
jbosszone
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