Message driven beans practical use
Hi,
I wanted to know,where Message driven beans are used in actual commercial projects???
Thanks in advance.
Hi,
Without naming any particular projects, i can asure you that MessageDriven Beans are used in commercially deployed systems.
Most important is to recognise the goal of MDBs. Everything inside a J2EE server is Request-Response like. Session and Entity beans react on requests. Because of the life cycle of these types of EJBs waiting for incoming messages is not realy a good idea.
In all cases were asynchronous middleware solutions are used, like MQ series for example, MDBs are used to listen for and react on incoming messages.
Furthermore, MDBs are used to decouple web tier from business tier where processing times of incoming data is too long to wait for by the clients.
Robert
Similar Messages
-
Message Driven Bean and transaction handling
We are using container managed transactions with MDB's running on OC4J version 10.1.2. We have two database serveres, both running Oracle 10g.
The MDB consume messages from the AQ-database through JMS (connected to a JDBC datasource registered as "jdbc/OracleAQDS").
The MDB onMessage() code update the second database, using a JDBC datasource registered as "jdbc/OracleDBDS".
We need atomic behaviour - if the MDB enforce a roll-back we want the updates aginst the second database to be rolled-back as well.
(1) Should we use XA-datasources since AQ and DB runs on two different servers or do the OC4J container "magically" provide two-phase-commit for us?
(2) If the MDB does a roll-back we would like to add an error record to a database table. Can we configure a third datasource and prevent if from beeing part of the container managed MDB roll-back?
(3) When the MDB force a roll-back, is there some way for us to override the retry-delay in our Java code? If we catch certain errors during processing in onMessage we know that it is not necessary to retry for at least one hour (while less severe errors should be retried in just seconds).{color:#008000}Hi Friends,
Thought of updating the answers for my questions in case somebody else would find it helpful.
{color}
{color:#999999}{color:#00ccff}I'm trying to make message driven bean and use the OnListener method.
But since I'm doing this for the first time I have very limited knowledge.
The following are my doubts :
1. Should I have a main function while using the MDB?{color}
{color:#008000} There is no need for any main function.{color}
{color:#00ccff}2. Is it mandatory to have JNDI setup done?
{color} {color}{color:#008000} There is no need for any JNDI setup done. But you need to configure the details on the
Websphere by creating valid entries inside Resources namely -
Queue Connection Factory, Queues and Listener Ports under the server.
Thanks,
Arun Prithviraj{color} -
Exception in setting up message-driven bean container: [MQJMS1010: not impl
Problem
=======
We are trying to configure and deploy a Message Driven
Bean to listen on a WebSphere MQ queue, using LDAP to
share knowledge of the Queue & Connection Factory.
But when we start the Sun One domain we get an exception:
javax.jms.JMSException: MQJMS1010: not implemented
(see log file at the end of this email)
Can anybody help please ?
The configuration of the various components are listed
below:
WebSphere MQ Configuration
==========================
Version 5.3
Queue Manager
QM_Test
Queues
PATH_MFP.Case.Request
Queue Type: Local
Channels
Channel_Test
Channel Type: Server Connection
Protocol Type: TCP/IP
LDAP configuration
==================
ldap://localhost/o=mqtest
cn=MFP_LOCAL_Factory
javaFactory=com.ibm.mq.jms.MQQueueConnectionFactoryFactory
javaClassName=com.ibm.mq.jms.MQQueueConnectionFactory
javaReferenceAddress=#3#QMGR#QM_Test
javaReferenceAddress=#6#CHAN#Channel_Test
javaReferenceAddress=#14#TM#SYSTEM.DEFAULT.MODEL.QUEUE
cn=MFP_LOCAL_Case_Request_Queue
javaFactory=com.ibm.mq.jms.MQQueueFactory
javaClassName=com.ibm.mq.jms.MQQueue
javaReferenceAddress=#9#QU#PATH_MFP.Case.Request
javaReferenceAddress=#10#QMGR#QM_Test
EJB configuration
=================
ejb-jar.xml
<message-driven>
<display-name>ServerMessageDrivenBean</display-name>
<ejb-name>ServerMessageDrivenBean</ejb-name>
<ejb-class>nz.co.acc.emi.server.connector.mdb.ServerMessageDrivenBean</ejb-class>
<transaction-type>Container</transaction-type>
<message-driven-destination>
<destination-type>javax.jms.Queue</destination-type>
</message-driven-destination>
</message-driven>
sun-ejb-jar.xml
<ejb>
<ejb-name>ServerMessageDrivenBean</ejb-name>
<jndi-name>MFP_LOCAL_Case_Request_Queue</jndi-name>
<mdb-connection-factory>
<jndi-name>MFP_LOCAL_Factory</jndi-name>
</mdb-connection-factory>
</ejb>
Sun One configuration
=====================
MFPProcessing: JNDI: External Resources
MFP_LOCAL_Factory Enabled javax.jms.QueueConnectionFactory
JNDI Name: MFP_LOCAL_Factory
Resource Type: javax.jms.QueueConnectionFactory
JNDI Lookup: cn=MFP_LOCAL_Factory
Factoryclass: com.sun.jndi.ldap.LdapCtxFactory
Properties:
java.naming.provider.url ldap://localhost:389/o=mqtest
java.naming.security.authentication none
MFP_LOCAL_Case_Request_Queue Enabled javax.jms.Queue
JNDI Name: MFP_LOCAL_Case_Request_Queue
Resource Type: javax.jms.Queue
JNDI Lookup: cn=MFP_LOCAL_Case_Request_Queue
Factoryclass: com.sun.jndi.ldap.LdapCtxFactory
Properties:
java.naming.provider.url ldap://localhost:389/o=mqtest
server.xml
<mdb-container steady-pool-size="10" pool-resize-quantity="2" max-pool-size="60" idle-timeout-in-seconds="600" monitoring-enabled="true" log-level="FINEST" />
<jms-service port="1240" admin-user-name="admin" admin-password="admin" init-timeout-in-seconds="30" enabled="true" log-level="FINE" />
Sun One log file
================
server.log
[01/Mar/2004:10:06:48] INFO ( 657): CORE1116: Sun ONE Application Server 7.0.0_01
[01/Mar/2004:10:06:51] INFO ( 657): CORE5076: Using [Java HotSpot(TM) Server VM, Version 1.4.2_01] from [Sun Microsystems Inc.]
[01/Mar/2004:10:07:09] INFO ( 657): JMS5023: JMS service successfully started. Instance Name = domain1_MFPProcessing, Home = [C:/Sun/AppServer7/imq/bin].
[01/Mar/2004:10:07:13] INFO ( 657): JTS5014: Recoverable JTS instance, serverId = [100]
[01/Mar/2004:10:07:14] INFO ( 657): RAR5060: Install JDBC Datasources ...
[01/Mar/2004:10:07:14] INFO ( 657): RAR5059: Binding [JDBC DataSource Name: jdbc/MfsDataSourceJConn, Pool Name: MFSConnectionPool]
[01/Mar/2004:10:07:15] INFO ( 657): JMS5015: Install JMS resources ...
[01/Mar/2004:10:07:47] WARNING ( 657): [EntityContainer] Created EntityContainer....
[01/Mar/2004:10:07:49] INFO ( 657): LDR5010: All ejb(s) of [mfs] loaded successfully!
[01/Mar/2004:10:07:52] INFO ( 657): MDB00044: Deploying message-driven bean [emi:ServerMessageDrivenBean], consuming from [MFP_LOCAL_Case_Request_Queue]
[01/Mar/2004:10:07:52] FINE ( 657): Messages delivery is part of a container-managed tx
[01/Mar/2004:10:07:52] FINE ( 657): emi:ServerMessageDrivenBean:reconnect-delay-in-seconds=60, reconnect-max-retries=60, reconnect-enabled=true
[01/Mar/2004:10:07:53] INFO ( 657): MDB00028: [emi:ServerMessageDrivenBean]: Message-driven bean container using external connection factory object: [com.ibm.mq.jms.MQQueueConnectionFactory]
[01/Mar/2004:10:07:55] FINE ( 657): emi:ServerMessageDrivenBean: Setting message-driven bean pool max-pool-size=60, steady-pool-size=10, pool-resize-quantity=2, idle-timeout-in-seconds=600
[01/Mar/2004:10:07:55] FINE ( 657): Initializing server session factory
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@11576d7
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@2d5534
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@34d75f
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@127d15e
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@12297d7
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@1ecfeb
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@11576d7
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@2d5534
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@34d75f
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@127d15e
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@12297d7
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@1ecfeb
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@e4776b
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@15c458c
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@da1515
[01/Mar/2004:10:07:55] FINE ( 657): Created server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@19e3e24
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@e4776b
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@15c458c
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@da1515
[01/Mar/2004:10:07:55] FINEST ( 657): run(): before wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@19e3e24
[01/Mar/2004:10:07:55] INFO ( 657): MDB0001: Create message-driven bean pool with maximum pool size [60], bean idle timeout [600] seconds
[01/Mar/2004:10:07:55] SEVERE ( 657): MDB00030: [emi:ServerMessageDrivenBean]: Exception in setting up message-driven bean container: [MQJMS1010: not implemented]
[01/Mar/2004:10:07:55] FINE ( 657): MDB00018: [emi:ServerMessageDrivenBean]: Closing message-driven bean container connection
[01/Mar/2004:10:07:55] WARNING ( 657): [AbstractPool]: Cancelled pool timer task at: Mon Mar 01 10:07:55 NZDT 2004
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@11576d7
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@11576d7
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@2d5534
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@2d5534
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@2d5534
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@34d75f
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@34d75f
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@127d15e
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@127d15e
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@127d15e
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@11576d7
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@34d75f
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@12297d7
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@12297d7
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@1ecfeb
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@1ecfeb
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@e4776b
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@e4776b
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@12297d7
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@e4776b
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@15c458c
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@15c458c
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@da1515
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@da1515
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@1ecfeb
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@15c458c
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@da1515
[01/Mar/2004:10:07:55] FINEST ( 657): Thread[main,5,main]: in cleanup() ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@19e3e24
[01/Mar/2004:10:07:55] FINE ( 657): Destroyed server session: com.iplanet.ias.ejb.containers.IASServerSessionImpl@19e3e24
[01/Mar/2004:10:07:55] SEVERE ( 657): MDB00017: [ServerMessageDrivenBean]: Exception in creating message-driven bean container: [javax.jms.JMSException: MQJMS1010: not implemented]
[01/Mar/2004:10:07:55] FINEST ( 657): run(): after wait ... com.iplanet.ias.ejb.containers.IASServerSessionImpl@19e3e24
[01/Mar/2004:10:07:55] SEVERE ( 657): javax.jms.JMSException
javax.jms.JMSException: MQJMS1010: not implemented
at com.ibm.mq.jms.services.ConfigEnvironment.newException(ConfigEnvironment.java:418)
at com.ibm.mq.jms.MQQueueConnection.createConnectionConsumer(MQQueueConnection.java:602)
at com.sun.enterprise.jms.ConnectionWrapperBase.createConnectionConsumer(ConnectionWrapperBase.java:151)
at com.sun.ejb.containers.MessageBeanHelperQueueImpl.doSetup(MessageBeanHelperQueueImpl.java:67)
at com.sun.ejb.containers.MessageBeanHelperBase.setup(MessageBeanHelperBase.java:419)
at com.sun.ejb.containers.MessageBeanContainer.<init>(MessageBeanContainer.java:206)
at com.sun.ejb.containers.ContainerFactoryImpl.createContainer(ContainerFactoryImpl.java:173)
at com.iplanet.ias.server.AbstractLoader.loadEjbs(AbstractLoader.java:345)
at com.iplanet.ias.server.ApplicationLoader.load(ApplicationLoader.java:81)
at com.iplanet.ias.server.AbstractManager.load(AbstractManager.java:134)
at com.iplanet.ias.server.ApplicationLifecycle.onStartup(ApplicationLifecycle.java:168)
at com.iplanet.ias.server.ApplicationServer.onStartup(ApplicationServer.java:269)
at com.iplanet.ias.server.J2EERunner.confPostInit(J2EERunner.java:162)
[01/Mar/2004:10:07:55] SEVERE ( 657): EJB5090: Exception in creating EJB container [javax.jms.JMSException: MQJMS1010: not implemented]
[01/Mar/2004:10:07:55] SEVERE ( 657): appId=emi moduleName=emiEjb_jar ejbName=ServerMessageDrivenBean
[01/Mar/2004:10:07:55] SEVERE ( 657): LDR5004: UnExpected error occured while creating ejb container
javax.jms.JMSException: MQJMS1010: not implemented
at com.ibm.mq.jms.services.ConfigEnvironment.newException(ConfigEnvironment.java:418)
at com.ibm.mq.jms.MQQueueConnection.createConnectionConsumer(MQQueueConnection.java:602)
at com.sun.enterprise.jms.ConnectionWrapperBase.createConnectionConsumer(ConnectionWrapperBase.java:151)
at com.sun.ejb.containers.MessageBeanHelperQueueImpl.doSetup(MessageBeanHelperQueueImpl.java:67)
at com.sun.ejb.containers.MessageBeanHelperBase.setup(MessageBeanHelperBase.java:419)
at com.sun.ejb.containers.MessageBeanContainer.<init>(MessageBeanContainer.java:206)
at com.sun.ejb.containers.ContainerFactoryImpl.createContainer(ContainerFactoryImpl.java:173)
at com.iplanet.ias.server.AbstractLoader.loadEjbs(AbstractLoader.java:345)
at com.iplanet.ias.server.ApplicationLoader.load(ApplicationLoader.java:81)
at com.iplanet.ias.server.AbstractManager.load(AbstractManager.java:134)
at com.iplanet.ias.server.ApplicationLifecycle.onStartup(ApplicationLifecycle.java:168)
at com.iplanet.ias.server.ApplicationServer.onStartup(ApplicationServer.java:269)
at com.iplanet.ias.server.J2EERunner.confPostInit(J2EERunner.java:162)
[01/Mar/2004:10:07:55] WARNING ( 657): CORE5021: Application NOT loaded: [emi]
[01/Mar/2004:10:07:55] INFO ( 657): WEB0100: Loading web module [mfs:mfs.war] in virtual server [MFPProcessing] at [mfs]
[01/Mar/2004:10:08:31] INFO ( 657): HTTP3072: HTTP listener http-listener-1 [http://ch042dysz0405:1080] ready to accept requests
[01/Mar/2004:10:08:31] INFO ( 657): CORE3274: successful server startup
[01/Mar/2004:10:08:33] INFO ( 657): CORE5053: Application onReady complete.Hi,
You have not created the jms destination queue object
jms/Warehouse
Your server logs says it cannot find the destination queue object.It has got nothing to do with jndi name of your bean
Create jms destination queue object using
asadmin>create-jms-resource instance <instance_name> resourcetype javax.jms.Queue --property imqDestinationName=<NAme> jms/Warehouse
Then use list-jms-resources <instance_name> to
find if jms/Warehouse destionation queue object has been created.
Get back in case of any issues -
Message Driven Bean and Distributed transaction
Hi ALL
I am developing an asynchronous application using MDB. My application flow is as follows:
1. From MDB onMessage i am calling a method MethodA that
a. calls a simple pojo1 where I am getting a Connection on XA enable datasource1 and executing Stored Procedure1 of DatabaseSchema1.
b. In that pojo without committing m closing the connection and coming back in MethodA.
c. Again from MethodA m calling a different pojo2 where I am getting a new Connection on XA enable datasource2 and executing Stored Procedure2 of
DatabaseSchema1. In this pojo also without committing m closing the connection and coming back in MethodA.
d. Again from MethodA m calling pojo1 where I am getting a new Connection on XA enable datasource1 and executing a different function of Stored Procedure1 of DatabaseSchema1.
Public class MDB{
Public void onMessage(��.)
Try{
Method1();
Catch(Exception x)
mdbcontext.setRollbackOnly();
Private void MethodA()
Call pojo1;
Call pojo2
Pojo1
Public void CallSP1()
Get connection from Datasource1 (shema1,user1, pwd1);
Call sp1();
//return without commit;
Pojo2
Public void CallSP2()
Get connection from Datasource2 (shema1,user2, pwd2);
Call sp2();
//return without commit;
SP1:
Insert table1
Savepoint 1
Insert into Table1
Rollback to 1
Insert a row
End SP1 (without commit)
SP2:
Insert table2
Savepoint 2
Update table2
Rollback to 2
Insert table2
End SP2 (without commit)
In ejb-jar.xml
Transaction type is Container
Transaction attribute is Required for all
Now problem is:
Case 1: success case when no exception is there at Java layer
SP1 works fine I mean there is only 2 inserts in Table 1
But In SP2 there are 3 inserts
Case 2: if an exception comes at Java layer
SP1 is fine
Rollback is not happening in SP2
In ejb-jar.xml transaction attributes is Required for all methods and transaction type is Container.
Backend is Oracle 10g and init.xa has already been run on that.
Will be very obliged if can have a single hint of the problem.
Both datasource are XA enable
Backend is Oracle 10g
Application server is WAS 6.0
Queue is WAS MQ 6.0
Thanks{color:#008000}Hi Friends,
Thought of updating the answers for my questions in case somebody else would find it helpful.
{color}
{color:#999999}{color:#00ccff}I'm trying to make message driven bean and use the OnListener method.
But since I'm doing this for the first time I have very limited knowledge.
The following are my doubts :
1. Should I have a main function while using the MDB?{color}
{color:#008000} There is no need for any main function.{color}
{color:#00ccff}2. Is it mandatory to have JNDI setup done?
{color} {color}{color:#008000} There is no need for any JNDI setup done. But you need to configure the details on the
Websphere by creating valid entries inside Resources namely -
Queue Connection Factory, Queues and Listener Ports under the server.
Thanks,
Arun Prithviraj{color} -
My problem in Weblogic and Message Driven Bean for Topic
Hello to all
I used this page (http://www.ecomputercoach.com/index.php/component/content/article/90-weblogic-jms-queue-setup.html?showall=1)
for setup JMS Server, Queue, Connection Factory on Weblogic Server
and I created a Message Driven Bean ,I used those Queue , and all things was OK
But I wanted to setup a Topic and use it in this manner
I created a Topic like previous steps for setup Queue
(http://www.ecomputercoach.com/index.php/component/content/article/90-weblogic-jms-queue-setup.html?showall=1)
Except in Step 3 ,I selected Topic instead of Queue
then I created a Message Driven Bean in JDeveloper , my Message Driven Bean is like this:
@MessageDriven(mappedName = "jndi.testTopic")
<p>
public class aliJMS1_MessageDrivenEJBBean implements MessageListener {
public void onMessage(Message message) {
if(message instanceof TextMessage ){
TextMessage txtM=(TextMessage) message;
try{
System.out.println(txtM.getText());
}catch(Exception ex){
ex.printStackTrace();
</p>
When I deploy the Application , Weblogic shows me this error:
+<Aug 30, 2011 11:32:28 AM PDT> <Warning> <EJB> <BEA-010061> <The Message-Driven EJB: aliJMS1_MessageDrivenEJBBean is unable to connect to th+
e JMS destination: jndi.testTopic. The Error was:
+[EJB:011011]The Message-Driven EJB attempted to connect to the JMS destination with the JNDI name: jndi.testTopic. However, the object with+
the JNDI name: jndi.testTopic is not a JMS destination, or the destination found was of the wrong type (Topic or Queue).>
And when I send message to the topic The Message Dirven Bean dosen't work
But when I create an ordinary Java application like this (it uses that Tpoic) :
import java.io.*;
import java.util.*;
import javax.transaction.*;
import javax.naming.*;
import javax.jms.*;
public class TopicReceive implements MessageListener
public final static String JNDI_FACTORY =
"weblogic.jndi.WLInitialContextFactory";
public final static String JMS_FACTORY =
"jndi.testConnectionFactory";
public final static String TOPIC = "jndi.testTopic";
private TopicConnectionFactory tconFactory;
private TopicConnection tcon;
private TopicSession tsession;
private TopicSubscriber tsubscriber;
private Topic topic;
private boolean quit = false;
public void onMessage(Message msg) {
try {
String msgText;
if (msg instanceof TextMessage) {
msgText = ((TextMessage)msg).getText();
} else {
msgText = msg.toString();
System.out.println("JMS Message Received: " + msgText);
if (msgText.equalsIgnoreCase("quit")) {
synchronized (this) {
quit = true;
this.notifyAll();
} catch (JMSException jmse) {
jmse.printStackTrace();
public void init(Context ctx, String topicName) throws NamingException,
JMSException {
tconFactory = (TopicConnectionFactory)ctx.lookup(JMS_FACTORY);
tcon = tconFactory.createTopicConnection();
tsession = tcon.createTopicSession(false, Session.AUTO_ACKNOWLEDGE);
topic = (Topic)ctx.lookup(topicName);
tsubscriber = tsession.createSubscriber(topic);
tsubscriber.setMessageListener(this);
tcon.start();
public void close() throws JMSException {
tsubscriber.close();
tsession.close();
tcon.close();
public static void main(String[] args) throws Exception {
InitialContext ic = getInitialContext("t3://127.0.0.1:7001");
TopicReceive tr = new TopicReceive();
tr.init(ic, TOPIC);
System.out.println("JMS Ready To Receive Messages (To quit, send a \"quit\" message).");
synchronized (tr) {
while (!tr.quit) {
try {
tr.wait();
} catch (InterruptedException ie) {
tr.close();
private static InitialContext getInitialContext(String url) throws NamingException {
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, JNDI_FACTORY);
env.put(Context.PROVIDER_URL, url);
env.put("weblogic.jndi.createIntermediateContexts", "true");
return new InitialContext(env);
It's OK and shows messages When I send message to the Topic
Now I want know why the Message Driven Bean doesn't work for those Topic
I want create a Message Driven Bean for Topic in the same way I created for Queue
I don't know what is problem , please advice me
ThanksCould you try adding a activationconfig to the message-driven bean, for example,
@MessageDriven(mappedName = "jndi.testTopic", activationConfig = {
@ActivationConfigProperty(propertyName = "destinationName", propertyValue = "jndi.testTopic"),
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Topic")
public class aliJMS1_MessageDrivenEJBBean implements MessageListener {
public void onMessage(Message message) {
if(message instanceof TextMessage ){
TextMessage txtM=(TextMessage) message;
try{
System.out.println(txtM.getText());
}catch(Exception ex){
ex.printStackTrace();
} -
Message driven beans and object binding
I want to write a message driven bean, and use javax.naming.Context's "bind(String,
Object)" method to bind the data to a key and eventually do a unbind(String) to
look up the data . Is binding/unbinding of object is allowed inside a message
driven bean or this violates the EJB2.0 spec? Also, does this have any negative
consequences if I use a Weblogic cluster as opposed to a single instance? Any
suggestions
Hi Austin,
- I don't know if it is "legal" in EJB 2.0
to call bind/unbind within an MDB. I
would assume so, but I'm not sure. You can try confirming with
the jndi and ejb newsgroups. Of course, if you don't
ask, then no one can tell you "no". ;-)
- Bind/unbind is a relatively expensive call performance-wise. I
suspect one might want to avoid doing too many of these per
second (the jndi newsgroup may be able to give pointers here.)
- Servers in a cluster do not instantly propagate bind/unbind info
to other servers in cluster, and JNDI may have trouble
efficiently supporting larger objects: both potential drawbacks
to using JNDI for data caching purposes.
Tom, BEA
Austin P wrote:
> I want to write a message driven bean, and use javax.naming.Context's "bind(String,
> Object)" method to bind the data to a key and eventually do a unbind(String) to
> look up the data . Is binding/unbinding of object is allowed inside a message
> driven bean or this violates the EJB2.0 spec? Also, does this have any negative
> consequences if I use a Weblogic cluster as opposed to a single instance? Any
> suggestions
-
Measuring throughput of message driven bean
Hi,
I am trying to do some performance testing. I will be send millions of messages
to a JMS server. These will be consumed by message driven beans (some appropriate
number created at start up and kept in cache).
The message driven bean performs uses some local entity bean to perform some database
transaction.
I want to measure how many messages did each of the instance of bean process?
How much total time did each of message bean spend for their share of messages
and average time for consumption of a message in a bean (which is actually dividing
the total time for consumption of messages for a message bean dividing by total
number of messages (assuming that bean pick up message instantaneously).
Any idea if I could do that through weblogic console (I am using WL 6.1). Or by
using MBeans??
Any other idea will be useful.
Thanks
MohitMohit,
Wily makes a tool tailored for doing the kind of performance evaluation you're
talking about. How useful it will be to your specific situation depends a lot
on some details that aren't in this post. Introscope (our tool) isn't designed
to crack apart individual instances of your message beans, but it is designed
to give you an idea of throughput per-component; exactly the kind of eval it looks
like you have in mind.
Roughly speaking... you can put rate and timer "tracers" on top of the relevant
methods in your bean's class. There are also increment and decrement tracers,
so you could match up send/receives between the components of your JMS app. This
will work across JVMs. There is (of course) some overhead for the monitoring,
but you could easily cancel out that number by doing a before and after and subtracting
our overhead-- you will be probably be impressed with how small it really it.
How many JVM instances are involved in your load test? How many different bean
classes? Are you using strictly the standard JMS API calls, or do you want to
monitor thing beyond that?
Drop me an e-mail if you're interested and we can talk about getting you set up
to try it out.
Dave Martin
[email protected]
Wily Technology, Inc.
(http://www.wilytech.com)
"Mohit Sehgal" <[email protected]> wrote:
>
Hi,
I am trying to do some performance testing. I will be send millions of
messages
to a JMS server. These will be consumed by message driven beans (some
appropriate
number created at start up and kept in cache).
The message driven bean performs uses some local entity bean to perform
some database
transaction.
I want to measure how many messages did each of the instance of bean
process?
How much total time did each of message bean spend for their share of
messages
and average time for consumption of a message in a bean (which is actually
dividing
the total time for consumption of messages for a message bean dividing
by total
number of messages (assuming that bean pick up message instantaneously).
Any idea if I could do that through weblogic console (I am using WL 6.1).
Or by
using MBeans??
Any other idea will be useful.
Thanks
Mohit -
Error deploying Message driven beans
hi everyone,
I am getting the following error while migrating an application from Websphere to SAP Web AS.
I am trying to used XSD(ejb-jar_2_1.xsd) instead of DTD(ejb-jar_2_0.dtd).
The error is --
Cannot parse persistent.xml or storage.xml
Reason: com.sap.engine.services.deploy.exceptions.BaseWrongStructureException: <b>Incorrect element. Expected: entity | session, found: message-driven..</b>
It seems it is not expecting a message-driven tag.
Why is this happening?
Can anyone please help..
thanks in advance,
Abhijithi Myriana,
Thanks for your response..
Yes it is a strange error.
It seems it is not able to recognise the "message-driven" error. Looking at the error it also seems that it is able to find and parse the XSD.
When i tried with DTD it works fine.
Is it so that SAP WebAS that comes with with Netweaver 4 does not support message-driven beans while using XSD?
From this error i think it is so..
Also I got some similar problem while using <local> and <local-home> tags.
regards,
Abhi -
Problem deploying message driven bean using Log4j
Hello all.
Using JDeveloper 11.1.1.0.2, I'm having a problem with a message driven bean I've created and associated with a JMS queue.
I've created an EJB Module project in my application (in which some other projects exist), and created the bean. A simple test of the bean, sending a message through the jms queue and printing it on system.out in the mdb onMessage() worked just fine.
However, when I add apache commons logging to my mdb, things start to go wrong. Running the project on the integrated weblogic 10.3 server just fails during deployment, due to a NoClassDefFoundError on org/apache/log4j/Logger.
In project properties -> libraries and classpath, I've added a log4j library (Log4j-1.2.14.jar) next to Commons Logging 1.0.4 but it doesn't seem to matter anything.
The code of my message bean:
@MessageDriven(mappedName = "weblogic.wsee.DefaultQueue")
public class MyMessageBean implements MessageListener {
// logger
private static Log sLog = LogFactory.getLog(MyMessageBean.class);
public void ejbCreate() {
public void ejbRemove() {
public void onMessage(Message message) {
MapMessage mapmsg = null;
try {
if (message instanceof MapMessage) {
mapmsg = (MapMessage)message;
boolean msgRedelivered = mapmsg.getJMSRedelivered();
String msgId = mapmsg.getJMSMessageID();
if (!msgRedelivered) {
sLog.debug("****** Successfully received message " + msgId);
} else {
sLog.debug("****** Successfully received redelivered message " + msgId);
// Haal de inhoud op:
int testInt = mapmsg.getInt("TestInt");
sLog.debug("TestInt:" + testInt);
} else {
sLog.debug("Message of wrong type: " +
message.getClass().getName());
} catch (Exception e) {
sLog.error("Fout in verwerken",e);
}Does anybody have any clue as to what I might be doing wrong or missing out here?
The complete stacktrace:
5-aug-2009 12:54:44 oracle.adf.share.config.ADFConfigFactory cleanUpApplicationState
INFO: Cleaning up application state
java.lang.ExceptionInInitializerError
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at weblogic.ejb.container.dd.xml.EjbAnnotationProcessor.processWLSAnnotations(EjbAnnotationProcessor.java:1705)
at weblogic.ejb.container.dd.xml.EjbDescriptorReaderImpl.processWLSAnnotations(EjbDescriptorReaderImpl.java:346)
at weblogic.ejb.container.dd.xml.EjbDescriptorReaderImpl.createReadOnlyDescriptorFromJarFile(EjbDescriptorReaderImpl.java:192)
at weblogic.ejb.spi.EjbDescriptorFactory.createReadOnlyDescriptorFromJarFile(EjbDescriptorFactory.java:93)
at weblogic.ejb.container.deployer.EJBModule.loadEJBDescriptor(EJBModule.java:1198)
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:380)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:42)
at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:615)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:191)
at weblogic.application.internal.EarDeployment.prepare(EarDeployment.java:16)
at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:155)
at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:197)
at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:89)
at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:217)
at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:723)
at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1190)
at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:248)
at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:159)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:157)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:12)
at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:45)
at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:516)
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)
Caused by: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@51b296 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger) (Caused by org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@51b296 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger))
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235)
at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351)
at nl.justid.dolores.mdb.MyMessageBean.<clinit>(MyMessageBean.java:19)
... 32 more
Caused by: org.apache.commons.logging.LogConfigurationException: No suitable Log constructor [Ljava.lang.Class;@51b296 for org.apache.commons.logging.impl.Log4JLogger (Caused by java.lang.NoClassDefFoundError: org/apache/log4j/Logger)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:413)
at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:529)
... 36 more
Caused by: java.lang.NoClassDefFoundError: org/apache/log4j/Logger
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
at java.lang.Class.getConstructor0(Class.java:2699)
at java.lang.Class.getConstructor(Class.java:1657)
at org.apache.commons.logging.impl.LogFactoryImpl.getLogConstructor(LogFactoryImpl.java:410)
... 37 more
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
... 42 more
<5-aug-2009 12:54:44 uur CEST> <Error> <Deployer> <BEA-149265> <Failure occurred in the execution of deployment request with ID '1249469684085' for task '14'. Error is: 'weblogic.application.ModuleException: Exception preparing module: EJBModule(Dolores-MessageBeans-ejb)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
null.'
weblogic.application.ModuleException: Exception preparing module: EJBModule(Dolores-MessageBeans-ejb)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
null.
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:452)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
Truncated. see log file for complete stacktrace
java.lang.ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
Truncated. see log file for complete stacktrace
>
5-aug-2009 12:54:44 oracle.adf.share.config.ADFConfigFactory cleanUpApplicationState
INFO: Cleaning up application state
<5-aug-2009 12:54:44 uur CEST> <Warning> <Deployer> <BEA-149004> <Failures were detected while initiating deploy task for application 'Dolores'.>
<5-aug-2009 12:54:44 uur CEST> <Warning> <Deployer> <BEA-149078> <Stack trace for message 149004
weblogic.application.ModuleException: Exception preparing module: EJBModule(Dolores-MessageBeans-ejb)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
null.
at weblogic.ejb.container.deployer.EJBModule.prepare(EJBModule.java:452)
at weblogic.application.internal.flow.ModuleListenerInvoker.prepare(ModuleListenerInvoker.java:93)
at weblogic.application.internal.flow.DeploymentCallbackFlow$1.next(DeploymentCallbackFlow.java:387)
at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:37)
at weblogic.application.internal.flow.DeploymentCallbackFlow.prepare(DeploymentCallbackFlow.java:58)
Truncated. see log file for complete stacktrace
java.lang.ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:276)
Truncated. see log file for complete stacktrace
>
[Deployer:149034]An exception occurred for task [Deployer:149026]deploy application Dolores on DefaultServer.: Exception preparing module: EJBModule(Dolores-MessageBeans-ejb)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
null..
weblogic.application.ModuleException: Exception preparing module: EJBModule(Dolores-MessageBeans-ejb)
[EJB:011023]An error occurred while reading the deployment descriptor. The error was:
null.
#### Deployment incomplete. #### Aug 5, 2009 12:54:44 PM
oracle.jdeveloper.deploy.DeployException
at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:247)
at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.deployImpl(Jsr88RemoteDeployer.java:157)
at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
at oracle.jdeveloper.deploy.common.BatchDeployer.deployImpl(BatchDeployer.java:82)
at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
at oracle.jdevimpl.deploy.fwk.WrappedDeployer.deployImpl(WrappedDeployer.java:39)
at oracle.jdeveloper.deploy.common.AbstractDeployer.deploy(AbstractDeployer.java:94)
at oracle.jdevimpl.deploy.fwk.DeploymentManagerImpl.deploy(DeploymentManagerImpl.java:436)
at oracle.jdeveloper.deploy.DeploymentManager.deploy(DeploymentManager.java:209)
at oracle.jdevimpl.runner.adrs.AdrsStarter$5$1.run(AdrsStarter.java:1365)
Caused by: oracle.jdeveloper.deploy.DeployException
at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.deployApplication(Jsr88DeploymentHelper.java:413)
at oracle.jdevimpl.deploy.common.Jsr88RemoteDeployer.doDeploymentAction(Jsr88RemoteDeployer.java:238)
... 11 more
Caused by: oracle.jdeveloper.deploy.DeployException: Deployment Failed
at oracle.jdevimpl.deploy.common.Jsr88DeploymentHelper.deployApplication(Jsr88DeploymentHelper.java:395)
... 12 more
#### Cannot run application Dolores due to error deploying to DefaultServer.
[Application Dolores stopped and undeployed from Server Instance DefaultServer]Thanks in advance!
Greetings,
Eelse
Edited by: Eelse on Aug 5, 2009 1:57 PM
Edited by: Eelse on Aug 5, 2009 5:39 PMCreating a new deployment profile (EAR) and including the original deployment (JAR) and the needed libraries (in a lib-directory) solved the problem.
-
Message-Driven Bean using @Resource annotation
I am trying to run a Message-Driven Bean very simple example in https://glassfish.dev.java.net/javaee5/ejb/examples/MDB.html
I configured MDBQueueConnectionFactory and MDBQueue properly on glassfish admin console.
I cannot run the example using @Resource annotation. I don't understand why.
@Resource(mappedName="MDBQueueConnectionFactory")
private static QueueConnectionFactory queueCF;
@Resource(mappedName="MDBQueue")
private static Queue mdbQueue;But I can run this example modifying the source code using InitialContext instance and looking up for JMS Resources.
InitialContext ctx = new InitialContext();
QueueConnectionFactory queueCF=(QueueConnectionFactory)ctx.lookup("MDBQueueConnectionFactory");
QueueConnection queueCon = queueCF.createQueueConnection();
Queue mdbQueue=(Queue)ctx.lookup("MDB");
queueSender.send(mdbQueue, msg);
...I want to figure out why @Resource annotation do not work well. Any help?
Thanks in advanced any help.Thanks for your reply.
The error that I get is a simple NullPointerException. Nothing else.
Like you said, I develop a servlet and I can use @Resource annotation without static reference, and it works.
public class TestMDB extends HttpServlet {
private static final long serialVersionUID = 1L;
@Resource(mappedName="MDBQueueConnectionFactory")
private QueueConnectionFactory queueCF;
@Resource(mappedName="MDB")
private Queue mdbQueue;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
out.println("TEST MDB "+queueCF);
QueueConnection queueCon;
try {
queueCon = queueCF.createQueueConnection();
QueueSession queueSession = queueCon.createQueueSession
(false, Session.AUTO_ACKNOWLEDGE);
QueueSender queueSender = queueSession.createSender(null);
TextMessage msg = queueSession.createTextMessage("hello");
queueSender.send(mdbQueue, msg);
out.println("Sent message to MDB");
queueCon.close();
} catch (JMSException e) {
e.printStackTrace();
}But my question were about using @Resource annotation on a standalone client. I always get NullPointerException.
public class MDBClient {
@Resource(mappedName="MDBQueueConnectionFactory")
private static QueueConnectionFactory queueCF;
@Resource(mappedName="MDB")
private static Queue mdbQueue;
public static void main(String args[]) {
try {
QueueConnection queueCon = queueCF.createQueueConnection();
QueueSession queueSession = queueCon.createQueueSession
(false, Session.AUTO_ACKNOWLEDGE);
QueueSender queueSender = queueSession.createSender(null);
TextMessage msg = queueSession.createTextMessage("hello");
queueSender.send(mdbQueue, msg);
System.out.println("Sent message to MDB");
queueCon.close();
} catch(Exception e) {
e.printStackTrace();
} -
B2B using JMS and Processing Messages with Message Driven Beans
We want to be able to use B2B to send messages to a JMS queue and then process messages from B2B using a Message Driven Bean. Is this supported.
We are using B2B 10.2.0.2 with Patchset 4.Hello,
In 10.1.2.0.2 B2B , as part of the internal Delivery channel B2B can only send and receive messages from JMS queues.
Rgds,Ramesh -
Messenger service using message driven beans
I need to implement a implement a messenger service. (using Messaging server, Message Queue, Message Clients and Message Driven Beans)
using netbeans 5.5
it should develop using EJB 3.0 architeture.
Can pls tell...how should i start this.(Basic steps of doing this)
Where should we write the Messaging server.(in a EJB 3.0 application...Is it?)
Any tutorial regrading this....!EJBs and Message Driven Part.
what should i develop first. Messaging server OR Message Queue
How can i develop the Messaging Server. Do i need to use Message driven beans there?
Message was edited by:
jugp -
How to transaction in the message driven bean?
hello
i write a message driven bean,that monitor the weblogic message queue,when a "Order"
object is witten to the queue,the mdb get it and write it to a entity bean "Orderinfo".all
of above logic is within the "onMessage" method of the mdb.
i want to encapsulate the flow in a transaction,see my code snippet of the onMessage
method:
ObjectMessage objMsg = (ObjectMessage) msg;
OrderVO orderVO = (OrderVO) objMsg.getObject();
System.out.println(orderVO.booklist);
OrderinfoHome orderinfoHome = (OrderinfoHome) ctx.lookup(
"java:/comp/env/orderinfo");
Orderinfo orderinfo = orderinfoHome.create(orderVO.orderID);
orderinfo.setAddress(orderVO.address);
orderinfo.setCustname(orderVO.custName);
orderinfo.setEmail(orderVO.email);
orderinfo.setBooklist(orderVO.booklist);
orderinfo.setPrice(new BigDecimal(orderVO.price));
and deploy descriptor snippet(ejb-jar.xml):
<assembly-descriptor>
<container-transaction>
<method>
<ejb-name>orderMDB</ejb-name>
<method-name>*</method-name>
</method>
<trans-attribute>Required</trans-attribute>
</container-transaction>
</assembly-descriptor>
i think during this transaction,there are two action:geting the object from the
queue and saving it to entity bean.in order to test the transaction,i modify the
jndi name of entity bean in the code to a WRONG one.redeploy my program,and send
a message to the queue,the mdb is activated,then the exception is thrown because
of the wrong jndi name.after that,i check the message queue,find that it is empty.why?i
think if the second action of the transaction is fail,the transaction should roll
back,the message should be send BACK to the queue.
i also ty to use the "javax.transaction.UserTransaction" in the onMessage method,but
the follwing exception is thrown:
javax.transaction.NotSupportedException: Another transaction is associated with
this thread.................................
who can help me,if any wrong with me,and how to use the transaction with the message
driven bean?
thank you.
The transaction should rollback if the MDB throws an
exception. Try changing your MDB code to
call "setRollbackOnly()" on the EJB
context (instead of throwing an exception) to see
if that works. If calling "setRollbackOnly()" fixes
the problem - then please contact customer support
and report a bug.
zbcong wrote:
> hello
>
> i write a message driven bean,that monitor the weblogic message queue,when a "Order"
> object is witten to the queue,the mdb get it and write it to a entity bean "Orderinfo".all
> of above logic is within the "onMessage" method of the mdb.
> i want to encapsulate the flow in a transaction,see my code snippet of the onMessage
> method:
>
>
> ObjectMessage objMsg = (ObjectMessage) msg;
> OrderVO orderVO = (OrderVO) objMsg.getObject();
> System.out.println(orderVO.booklist);
> OrderinfoHome orderinfoHome = (OrderinfoHome) ctx.lookup(
> "java:/comp/env/orderinfo");
> Orderinfo orderinfo = orderinfoHome.create(orderVO.orderID);
> orderinfo.setAddress(orderVO.address);
> orderinfo.setCustname(orderVO.custName);
> orderinfo.setEmail(orderVO.email);
> orderinfo.setBooklist(orderVO.booklist);
> orderinfo.setPrice(new BigDecimal(orderVO.price));
>
>
> and deploy descriptor snippet(ejb-jar.xml):
>
>
> <assembly-descriptor>
> ............
> ...........
>
> <container-transaction>
> <method>
> <ejb-name>orderMDB</ejb-name>
> <method-name>*</method-name>
> </method>
> <trans-attribute>Required</trans-attribute>
> </container-transaction>
> </assembly-descriptor>
>
>
> i think during this transaction,there are two action:geting the object from the
> queue and saving it to entity bean.in order to test the transaction,i modify the
> jndi name of entity bean in the code to a WRONG one.redeploy my program,and send
> a message to the queue,the mdb is activated,then the exception is thrown because
> of the wrong jndi name.after that,i check the message queue,find that it is empty.why?i
> think if the second action of the transaction is fail,the transaction should roll
> back,the message should be send BACK to the queue.
>
> i also ty to use the "javax.transaction.UserTransaction" in the onMessage method,but
> the follwing exception is thrown:
>
> javax.transaction.NotSupportedException: Another transaction is associated with
> this thread.................................
>
> who can help me,if any wrong with me,and how to use the transaction with the message
> driven bean?
>
> thank you.
>
>
-
Can you set isolation levels of message-driven bean transactions?
The problem: I have 3 different message-driven beans which each get a different type of message, except for a field that is common to all. That field is used as the primary key of an entity object. The message-driven beans configured to use a container managed transaction. Each message-driven bean, in processing the message, first does a lookup by primary key to see if the object associated with the key exists, and if it does not, it requests the entity's home object to create it. After that, they do further processing. The problem is that sometimes all the beans simultaneously get a message, resulting in each bean checking for the entity object at about the same time, and if they fail to find it (because none of them has created it yet), each creates an object, all with the same primary key. This is not caught until the beans start to complete their onMessage method, which I believe results in the container committing the transaction. One of the transactions will be committed successfully, while the other two will fail, get rolled back, and then be retried with the same message. The second time through, the other beans will find the entity object (since it has been created and committed) and they will complete correctly. In the end, they right thing occurs, except that there is a troubling exception or 2 in the log telling about the constraint violation (with the primary key) and the rollback. If it was just me, that would be fine, but our customer does not like to see exceptions in the log; that indicates to him that something is wrong.
So, I am looking for someway to make sure that the actions of the message-driven beans are serialized. One suggestion from a colleague was to set the isolation level of the transactions being used by the container in processing the message-driven beans' onMessage method. However, the documentation does not mention any way to do this for a message-driven bean. Suggestions?
Is the use of a UserTransaction a better way to do this? If I acquire a UserTransaction within the onMessage method of a message-driven bean, can I set its isolation level? How would this work? When I get a UserTransaction, does each client get a different transaction, or do they all get the same one?(1) The WebLogic JMS "unit-of-order" feature is a heavily adopted feature that was specifically designed to handle similar use cases - see the JMS developer guide for extensive documentation. In your use case, if "key" is used to define UOO, then there's no limit on the number of keys that can be processed concurrently, but messages for any particular key will be processed single-threaded in the order in which they were first submitted.
Note that if you're using distributed destinations, the UOO feature is still fully supported - but the developer and/or administrator needs to decide whether to configure the destination to use "hash" or "path service" based routing (the JMS UOO edoc outlines the trade-offs).
(2) Another alternative is to use a single MDB with max-beans-free-pool that processes all three types (as the other poster suggested). I think this assumes all MDBs run on the same JVM.
(3) Another alternative is to use multiple queues, with a single MDB on each Q. Where some sort of hash algorithm is used to determine which Q is for the key. This approach is a "hand-coded" variant of the approach in (1) with "hash" based routing enabled...
(4) If all MDBs actually do run in the same JVM, a third alternative is to use code the application to use a common lock to protect each key, eg, something like:
// assume MyLock is simply a class with a "reference counter"
// assume some global "staticHM" hash map that is all MDBs can access
onMessage() {
MyLock lock = null;
key= msg.getKey();
synchronized(staticHM) {
lock = staticHM.get();
if (lock = null) {
lock = new lock();
staticHM.put(key, new lock());
lock.incRefCount();
try {
synchronized(lock) {
// only one onMessage will be able to lock a particular key at a time
do your work;
} finally {
synchronized(staticHT) {
if (lock.defRefCount() == 0) staticHM.remove(lock);
if (lock = null) staticHM.put(key);
If multiple threads get a message with the same key, then only one thread at a time will work on the key.
Hope this helps,
Tom -
WebLogic 10 and EJB 3.0 for Message Driven Bean
Hi,
I am trying to deploy Message Driven Bean using EJB3.0 on weblogic 10. I am using annotations and don't want to use deployment descriptors.
The Bean class:
CalculatorBean.java
import javax.ejb.*;
import javax.jms.*;
import java.sql.Timestamp;
import java.util.StringTokenizer;
@MessageDriven(activationConfig =
@ActivationConfigProperty(propertyName="destinationType",
propertyValue="javax.jms.Queue"),
@ActivationConfigProperty(propertyName="destination",
propertyValue="queue/mdb")
public class CalculatorBean implements MessageListener {
public void onMessage (Message msg) {
TextMessage tmsg=null;
try {
if (msg instanceof TextMessage) {
tmsg = (TextMessage) msg;
System.out.println
("MESSAGE BEAN1: Message received: "
+ tmsg.getText());
} else {
System.out.println
("Message of wrong type1: "
+ msg.getClass().getName());
catch (JMSException e) {
e.printStackTrace();
catch (Throwable te) {
te.printStackTrace();
My client:
import javax.naming.*;
import javax.naming.InitialContext;
import java.text.*;
import javax.jms.*;
public class MsgClient {
public static void main(String args[])
QueueConnection cnn=null;
QueueSender sender=null;
QueueSession sess=null;
Queue queue=null;
try {
java.util.Properties p = new java.util.Properties();
p.put("java.naming.factory.initial","weblogic.jndi.WLInitialContextFactory");
p.put("java.naming.provider.url","t3://10.6.74.79:7001");
Context ctx=new InitialContext(p);
//InitialContext ctx=new InitialContext(p);
queue = (Queue)ctx.lookup("queue/mdb");
QueueConnectionFactory factory = (QueueConnectionFactory)ctx.lookup("ConnectionFactory");
cnn = factory.createQueueConnection();
sess= cnn.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
sender = sess.createSender(queue);
TextMessage message = sess.createTextMessage();
message.setText("This is message by Gurumurthy" );
System.out.println("Sending message: " +message.getText());
sender.send(message);
sess.close();
catch (Exception e)
e.printStackTrace();
I am compiling and creating jar file for this class. Then I am creating a .ear file for this.
The meta-inf/application.xml contains the following:
<?xml version="1.0" encoding="UTF-8"?>
<application xmlns="http://java.sun.com/xml/ns/j2ee" version="1.4"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com /xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/application_1_4.xsd">
<display-name>MDBWorking1</display-name>
<description>Application description</description>
<module>
<ejb>MDBWorking1.jar</ejb>
</module>
</application>
I don't want to use deployment descriptor (ejb-jar.xml or weblogic-ejb-jar-xml), because I want to utilize the annotation feature of EJB3.0
So, after creating the .ear file for this, and try to deploy on weblogic 10, I get the following error:
An error occurred during activation of changes, please see the log for details.
Exception preparing module: EJBModule(MDBWorking1.jar) Unable to deploy EJB: CalculatorBean from MDBWorking1.jar: [EJB:011113]Error: The Message Driven Bean 'CalculatorBean(Application: MDBWorking1, EJBComponent: MDBWorking1.jar)', does not have a message destination configured. The message destination must be set using a message-destination-link, destination-resource-link, destination-jndi-name or a resource-adapter-jndi-name.
Substituted for missing class [EJB - 11113]Error: The Message Driven Bean 'CalculatorBean(Application: MDBWorking1, EJBComponent: MDBWorking1.jar)', does not have a message destination configured. The message destination must be set using a message-destination-link, destination-resource-link, destination-jndi-name or a resource-adapter-jndi-name.
How to solve this?
Note:
I don't want to use Deployment Descriptor and all I want to use is EJB3.0's annotation feature.
Thanks,
GuruDear gurubbc,
I don't know if it still matters to you but you can use the javax.ejb.MessageDriven annotation to point your bean on your queue. I had the same issue like you but i could not solve it properly by switchihg to weblogic.ejb.MessageDriven.
Use the following annotation and it should work out:
@MessageDriven
(mappedName = "queue/mdb",
name = "CalculatorBean",
activationConfig = {
@ActivationConfigProperty(propertyName = "destinationType", propertyValue = "javax.jms.Queue")
Here you can see that the mappedName is the JNDI name of the queue you are trying to connect to. The name is the name for your Bean, and the only property passed is the destination type.
Hope this helps.
Cheers,
Istvan
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