Finding a Queue
In order to find a queue, first of all the queue must be created. This can be achieved through the Universal Messaging Enterprise Manager, or programmatically (see
Creating a Queue). First of all you must create your nSession object, which is your effectively your logical and physical connection to a Universal Messaging Realm. This is achieved by using the correct RNAME for your Universal Messaging Realm when constructing the nSessionAttributes object, as shown below:
std::string[] RNAME={"nsp://127.0.0.1:9000"};
nSessionAttributes *nsa=new nSessionAttributes(RNAME);
nSession *mySession = nSessionFactory->create(nsa);
mySession->init();
Once the nSession->init() method is successfully called, your connection to the realm will be established.
Using the nSession objects instance 'mySession', we can then try to find the queue object. Queues have an associated set of attributes, that define their behaviour within the Universal Messaging Realm Server. As well as the name of the queue, the attributes determine the availability of the events published to a queue to any consumers wishing to consume them.
To find a queue previously created, we do the following:
nChannelAttributes *cattrib = new nChannelAttributes();
cattrib->setName("myqueue");
nQueue *myQueue = mySession->findQueue(cattrib);
Now we have a reference to a Universal Messaging queue within the realm.