列出Tibco EMS中的所有JMS队列

Question

I am writing a Java class to browse a Tibco EMS JMS server and show all queues. I'm able to connect without issues and browse specific queues but I am looking for a way to return a list of all queues (with queue depth if possible). I'm not if there is a specific EMS API to use so I am using standard JMS.

I've tried the following code to do a reverse JNDI lookup but it is failing.

NamingEnumeration<?> queues = context.list("");
List<String> availableQueuesNames = new ArrayList<String>();
while (queues.hasMoreElements()) {
    NameClassPair element = (NameClassPair) queues.nextElement();
    availableQueuesNames.add(element.getName());
}

Which throws this error:

javax.naming.OperationNotSupportedException: Not supported
    at com.tibco.tibjms.naming.TibjmsContext.list(TibjmsContext.java:1018)
    at com.tibco.tibjms.naming.TibjmsContext.list(TibjmsContext.java:484)
    at javax.naming.InitialContext.list(Unknown Source)

I did some digging and it seems Tibco EMS does not support looking into the JNDI like this. Is there another way to accomplish this?

Answer 1

Using the tibjmsServerAdministrator.java same class provided with Tibco as a guide (and the addAdmin() method), I was able to write code to list all queues:

Map<String, TibjmsAdmin> map = new HashMap<String, TibjmsAdmin>();
addAdmin(txtServer.getText(), txtUser.getText(), txtPassword.getText(), map);
_admin = new TibjmsAdmin[map.size()];
map.values().toArray(_admin);

QueueInfo[] info = _admin[0].getQueues(null);
for (int i = 0; i < info.length; i++) {
    String queueName = info[i].getName();
    if (!queueName.startsWith("$") && !queueName.startsWith(">")) {
        queues.add(queueName + ", 0");
    }
}

Answer 2

I'm not sure about Tibco details, but maybe it would work with listBindings instead of list ?

I have done the same thing in a generic way like this:

List<Queue> out = new ArrayList<>();
scanJndiForQueues(out, "");

...

private void scanJndiForQueues(List<Queue> out, String path) throws NamingException {
    InitialContext context = new InitialContext();
    Object resource = context.lookup(path);
    if (isSubContext(resource)) {
        NamingEnumeration<Binding> list = context.listBindings(path);
        while (list.hasMoreElements()) {
            Binding binding = list.nextElement();
            scanJndiForQueues(out, path + "/" + binding.getName());
        }
    } else if (resource instanceof Queue) {
        out.add((Queue) resource);
    } // else ignore Topics
}

private boolean isSubContext(Object object) {
    return javax.naming.Context.class.isAssignableFrom(object.getClass());
}

Answer 3

Don't know why you need to list all the EMS queues, but you can achieve this (and many other things) with the GEMS tool.

Search for it at tibcommunity (you will need an account), or you can download the last version directly from here .