Print a message if connecting is taking too long

gistfile1.java

    private void attachListener() {
        ScheduledFuture<?> activemqWarning = scheduleWarningIfJmsConnectionTakesTooLong();
        try {
            // perform some operation that may hang if ActiveMq is not running
        } finally {
            activemqWarning.cancel(true);
        }
    }

    private ScheduledFuture<?> scheduleWarningIfJmsConnectionTakesTooLong() {
        return Executors.newSingleThreadScheduledExecutor().schedule(new Runnable() {
            public void run() {
                System.err.println("WARNING: It's taking a long time to connect to JMS - check ActiveMQ is running!");
            }
        }, 10, TimeUnit.SECONDS);
    }

ActiveMq client code hangs if the server is not up. It would be helpful if we knew that is why it is hanging.
So, schedule a thread to print a message if we can't connect within 10 seconds.

You could just this from the URL used to connect the ActiveMQ broker - see http://activemq.apache.org/failover-transport-reference.html for information on setting failover timeouts.

Setting a failover timeout means my app quits. I'd rather see a warning and be able to start activemq without restarting my app.