MessageReference ref2 = generateReference(queue, 2);
queue.addLast(ref2);
MessageReference ref3 = generateReference(queue, 3);
queue.addLast(ref3);
MessageReference ref4 = generateReference(queue, 4);
queue.addLast(ref4);
// Now send some more scheduled messages
MessageReference ref5 = generateReference(queue, 5);
ref5.setScheduledDeliveryTime(now + 5000);