JMS versus IBM MQSeries

Question

1. What is the difference between JMS and IBM MQSeries ?
2. If JMS is all about APIs to interact with Message Oriented Middleware (MOM) that IBM MQSeries supports, why not use a simple JAVA program that would import com.ibm. * packages instead of JMS APIs ? What is the benefit we derive from using JMS ?

Answer 1

I think what you are saying is JMS is the preferred
way to communicate with MOM (i.e. MQ) as it is
standard and not vendor dependant. My concern is
this:
If we write a stand alone program to send/retrieve
meessage from MQ then how do we create
ConnectionFactory and connection? Personally I prefer to use Dependency Injection using a library like Spring to configure things like JMS connection factories, JDBC DataSources etc.
http://www.springframework.org/
though the more typical (and some would say official) way of doing it is to use JNDI in your application. So create a JNDI context and pull the JMS ConnectionFactory and destinations out of JNDI.
e.g. like this
http://svn.activemq.org/trunk/activemq/modules/core/src/test/org/activemq/demo/SimpleProducer.java?rev=1&view=auto
Then you need to refer to your JMS provider's documentation on how to configure a JNDI context. Typically its a case of adding a jndi.properties file to the classpath configured to your provider's JNDI provider.
Don't we need MQ
classes to create these objects.Yes, you need the classes from your JMS provider to create connections & sessions. (Its not like EJB remoting where you can create client side proxies from the EJB interfaces).
James
http://logicblaze.com/