Major Description
Right now, to monitor the number of destination, the only way is to read the destinations MBean and get the total destination. However, this means reading all destination names into memory, if the user has 10K+ destination with long destination name, it will be a large amount of memory just to monitor the number of them.
The proposal here is to add either a new MBean value or a method to obtain that data. We can also add a method to retrieve the first K destination as well.
