Stocklist JMS demo with WebSphere MQ

Stocklist JMS demo uses TIBCO Enterprise Message Service(TM) as JMS provider. Do we have a example that uses MQ as the JMS provider ?

Hi,

please read the JMS Adapter Example.pdf file available in the LS_HOME/DOCS-SDKs/sdk_adapter_java/examples/StockListDemo_JMS_DataAdapter folder, it explains how to configure the adapter/generator to run with JbossMQ.

HTH

Thanks for the reply.

I went through that PDF - I am looking for a demo with MQ as JMS provider, not JBoss. Do we have such a demo somewhere ?

Thanks
Sharathbabu

sorry, i thought that with MQ you were referring to JbossMQ
btw as you can see there is not much difference in configuring the demo with JbossMQ Jboss Messaging or Tibco EMS so that I suppose that also with your MQ it should be straightforward.

You just have to locate the correct jar(s) from your MQ and configure the jmsUrl, initialContextFactory, topicConnectionFactory, queueConnectionFactory,topicName and queueName in the adapters.xml file.

Obviously I assume that you've already created the need topic and queue in your MQ.

Do you get stuck somewhere?

I am trying to run the Generator

I made two changes -
1) Changed provided to Websphere MQ
2) Change Initial Context factory to FileSystem context - like this

===================test.conf=========
#Websphere MQ Messaging example configuration
jmsUrl=file:/c://Lightstreamer//Generator//JMS
initialContextFactory=com.sun.jndi.fscontext.RefFS ContextFactory
topicConnectionFactory=TopicConnectionFactory
queueConnectionFactory=QueueConnectionFactory
topicName=topic/stocksTopic
queueName=queue/stocksQueue
=====================

Created a .bindings file in folder "c://Lightstreamer//Generator//JMS" using following jndi file
==================================
def qcf(QueueConnectionFactory) qmanager(BROKER2_QM) HOSTNAME(localhost) PORT(1415) CHANNEL(SYSTEM.DEF.SVRCONN) TRANSPOT(CLIENT)
*
def q(queue/stocksQueue) qu(QUEUE.STOCKSQUEUE)
*
def tcf(TopicConnectionFactory) qmanager(BROKER2_QM) HOSTNAME(localhost) PORT(1415) CHANNEL(SYSTEM.DEF.SVRCONN) TRANSPOT(CLIENT)
*
def t(topic/stocksTopic) topic(TOPIC.STOCKSTOPIC)
*
DIS CTX
END
================================================
Copied following Websphere MQ libs to generator lib
jms.jar
jndi.jar
fscontext.jar
providerutil.jar
com.ibm.mqjms.jar
com.ibm.mq.jar

---
updated start_generator.bat to include MQ libs

When I run: start_generator.bat - I get a "java.lang.ClassCastException" exception

===============
29-Jul-10 19:25:47,628 |INFO |SLGenerator |Thread-2 |JNDI Context[{java.naming.provider.url=file:/c://Lightstreamer//Generator//JMS, java.naming.factory.initial=com.sun.jndi.fscontext .RefFSContextFactory}]...
29-Jul-10 19:25:47,628 |INFO |SLGenerator |Thread-2 |Looking up topic connection
factory [TopicConnectionFactory]...
Exception in thread "Thread-2" java.lang.ClassCastException: javax.naming.Reference
29-Jul-10 19:25:47,644 |ERROR|SLGenerator |Thread-3 |Unable to send message - JMS
Exception:Topic publisher not ready
at stocklist_jms_demo.common.JMSHandler.initTopicSess ion(JMSHandler.java:205)
at stocklist_jms_demo.common.JMSHandler.initTopicPubl isher(JMSHandler.java:304)29-Jul-10 19:25:47,644 |DEBUG|SLG
enerator |Thread-3 |Heartbeat sent: 452

at stocklist_jms_demo.feed_simulator.Generator$Connec tionLoopTPQR.connectionCall(Generator.java:399)
at stocklist_jms_demo.common.ConnectionLoop.run(Conne ctionLoop.java:40)
29-Jul-10 19:25:48,644 |ERROR|SLGenerator |Thread-3 |Unable to send message - JMS
Exception:Topic publisher not ready
============

Thanks
Sharathbabu

hi,
it seems that you've not configured the needed topic on your JMS server, is that correct?

The problem is in this line of code in JMSHandler.java -

==
topicConnectionFactory = (TopicConnectionFactory) jndiContext.lookup(topicConnectionFactoryName);
==

The "jndiContext.lookup()" is returning a " javax.naming.Reference" - which is not getting cast to "javax.jms.TopicConnectionFactory"

Same thing with Queue connection factory - not able to cast javax.naming.Reference to "javax.jms.QueueConnectionFactory"

Thanks
Sharathbabu
Unable to figure out what is missing.

is your problem similar to this one? http://theaveragelife.wordpress.com/...on-server-6-1/

Got the Generator working with WebSphere MQ JMS provider

The problem was due to some missing JARs in CLASSPATH. Still have not figured out which specific JAR. in start_generator.bat, included all the MQ JARs in CLASSPATH like this
===
set EXT_DIR="C:\Program Files\IBM\WebSphere MQ\Java\lib"
set command=%JAVA_HOME%\bin\java.exe -Djava.ext.dirs=%EXT_DIR% -cp %cpath% %class% %CONF_FILE%

%command%
===

Now working on the Adapter part to get the demo going.

Thanks for your quick replies
Sharathbabu