Hi all,
I'm working with an existing web application (running in Tomcat 7.0.26) that
normally communicates with external systems over IBM WebsphereMQ, via the
JMS API. The code looks similar to:
Hashtable<String, String> env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, initialContextFactory);
env.put(Context.PROVIDER_URL, providerURL);
// Note that this is instantiating an InitialDirContext,
// NOT an InitialContext!!!
Context context = new InitialDirContext(environment);
qcf = (QueueConnectionFactory)context.lookup(qcfName);
requestQueue = (Queue)context.lookup(requestQueueName);
responseQueue = (Queue)context.lookup(responseQueueName);
//... etc, usual type of JMS code
I'm now trying to make this work with ActiveMQ 5.10 client libraries. A
restriction on my end is that I cannot modify the source code. The only
thing I have to play with are the variables as shown in the above code:
- initialContextFactory is in the current case always set
to com.sun.jndi.fscontext.RefFSContextFactory
- providerURL is currently set to a file://C:/directory URL,
pointing to a .bindings file as generated by "Managed JMS Objects"
from WebsphereMQ Explore
- requestQueueName & responseQueueName
I'm now changing initialContextFactory to
org.apache.activemq.jndi.ActiveMQInitialContextFactory, and providerURL to
tcp://localhost:61616. Although I'm not getting any errors from the code, it
doesn't work. I cannot see any connection in the ActiveMQ Web Admin console.
Unfortunately I also cannot run this in a debugger to see what's going on :(
Researching on the web, I see that normally ActiveMQ JNDI with Tomcat is set
up differently:
- Resource entries in context.xml
- Create the InitialContext as new InitialContext();
- get a 'sub context' as envContext = (Context)
initCtx.lookup("java:comp/env");
- Get the JMS objects from this sub context (using a "jms/" prefix)
But as I wrote before, this is not an option for me: although I have access
to the code, I cannot modify it.
Does anybody know a way around this? How can I get ActiveMQ
QueueConnectionFactory/Queue objects from an instance of InitialDirContext,
initialized only with INITIAL_CONTEXT_FACTORY and PROVIDER_URL, and
presumably without any additional configuration on the Tomcat side (although
if necessary I do have the option of changing the tomcat config as well).
Maarten
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