MessageBroker.getMessageBroker(null) getting null pointer Exception

I am creating Dynamic Destinations

MessageBroker broker = MessageBroker.getMessageBroker(null);

        MessageService开发者_运维技巧 service = (MessageService) broker.getService("message-service");
        MessageDestination destination = (MessageDestination) service.createDestination("Group1");

        if (service.isStarted()) {
            destination.start();
        }

But I am getting Null Pointer Exception MessageBroker broker = MessageBroker.getMessageBroker(null);

Can Anyone Help Me

You may be using Spring blazeds integration. Flex, by default uses "__default__" as the messageBroker id in which case your MessageBroker.getMessageBroker(null) holds true. However, Spring uses "_messageBroker" as the broker id. Therefore you might have to use

MessageBroker broker=MessageBroker.getMessageBroker("_messageBroker");

This URL says it even better....

http://forum.springsource.org/showthread.php?t=72964

MessageBroker broker=MessageBroker.getMessageBroker(BeanIds.MESSAGE_BROKER);