Problem running JMS stocks demo

mnenchev

Hi, i'm trying to run the Stocks demo with JMS, but when i start the shell script start_generator.sh I got:

06-Aug-09 16:37:12,716 |INFO |SLGenerator                      |main                       |Stock generator is starting. Loading configuration...
06-Aug-09 16:37:12,717 |DEBUG|SLGenerator                      |main                       |jmsUrl: jnp://localhost:1099
06-Aug-09 16:37:12,717 |DEBUG|SLGenerator                      |main                       |initialContextFactory: org.jnp.interfaces.NamingContextFactory
06-Aug-09 16:37:12,717 |DEBUG|SLGenerator                      |main                       |topicConnectionFactory: ConnectionFactory
06-Aug-09 16:37:12,717 |DEBUG|SLGenerator                      |main                       |queueConnectionFactory: ConnectionFactory
06-Aug-09 16:37:12,717 |DEBUG|SLGenerator                      |main                       |topicName: topic/stocksTopic
06-Aug-09 16:37:12,718 |DEBUG|SLGenerator                      |main                       |queueName: queue/stocksQueue
06-Aug-09 16:37:12,718 |DEBUG|SLGenerator                      |main                       |msgPoolSize: 15
06-Aug-09 16:37:12,718 |DEBUG|SLGenerator                      |main                       |recoveryPauseMillis: 2000
06-Aug-09 16:37:12,720 |DEBUG|SLGenerator                      |main                       |JMSHandler Ready
06-Aug-09 16:37:12,736 |DEBUG|SLGenerator                      |main                       |Generator ready
06-Aug-09 16:37:12,736 |INFO |SLGenerator                      |main                       |Generator ready.
06-Aug-09 16:37:12,761 |ERROR|SLGenerator                      |Thread-3                   |Unable to send message - JMSException:Topic publisher not ready
06-Aug-09 16:37:12,761 |DEBUG|SLGenerator                      |Thread-3                   |Heartbeat sent: 255
06-Aug-09 16:37:12,761 |ERROR|SLGenerator                      |Thread-2                   |NamingException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory
javax.naming.NoInitialContextException: Cannot instantiate class: org.jnp.interfaces.NamingContextFactory [Root exception is java.lang.ClassNotFoundException: org.jnp.interfaces.NamingContextFactory]
	at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:657)
	at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
	at javax.naming.InitialContext.init(InitialContext.java:223)
	at javax.naming.InitialContext.<init>(InitialContext.java:197)
	at stocklist_jms_demo.common.JMSHandler.initJMS(JMSHandler.java:108)
	at stocklist_jms_demo.common.JMSHandler.initTopicSession(JMSHandler.java:200)
	at stocklist_jms_demo.common.JMSHandler.initTopicPublisher(JMSHandler.java:304)
	at stocklist_jms_demo.feed_simulator.Generator$ConnectionLoopTPQR.connectionCall(Generator.java:399)
	at stocklist_jms_demo.common.ConnectionLoop.run(ConnectionLoop.java:40)
Caused by: java.lang.ClassNotFoundException: org.jnp.interfaces.NamingContextFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
	at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:247)
	at com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:46)
	at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:654)
	... 8 more

FYI: The jms.jar was missing and i added jms-1.1.jar
One other question: I looked at the jms implementation demo. It looks pretty complex :Smile_Ab: and reliable. Could it be used in real world project with little modifications?? It also has fail over mechanisms but doesn't they make it slower or heavy? I do ask this questions because i can't manage to run it yet.
Where is this NamingContextFactory.class? What other lib should i add?
Regards.

Mone

I think that jbossmq-client.jar is missing, it should be placed where the jms.jar file is.
let me know if that was the problem

mnenchev

Hi!
Well every thing was described in the README.txt file, but i'm lazy and i did't read it :Smile_Ag: .
Here is the list of the included jar files:
concurent.jar
javaasisst.jar
jboss-aop-client.jar
jboss-common-core.jar
jboss-logging-spi.jar
jboss-mdr.jar
jboss-messaging.jar
jboss-messaging-client.jar
jboss-remoting.jar
jboss-serialization.jar
jms-1.1.jar
jnp-client.jar
log4j-1.2.15.jar
trove.jar

I'm using jboss 5.10 and every thing work :Smile_Ab: .

One more question. LS is designed to be independent from the data fead(generators). So if the generator run outside the LS like java console application we add one more point of failure. So is it better to run the generator inside the LS?

Regards.

Dario Crivelli

In our demo, the generator is just a placeholder for a real feed,
which is independent from Lightstreamer application;
hence, it does not represent a module to be added to the final architecture,
but a module that already exists.
Obviously, the feed cannot be embedded in the Data Adapter,
but only remotely accessed.