I've been searching online for a while, but with no luck so far. Is it possible to implement this in Java http://www.codeproject.com/Articles/144344/Query-Notification-using-SqlDependency-and-SqlCach? Is it supported by JDBC for SQL Server 2012?
You want to listen to SQL server notifications. You can configure MSSql Server to notify a Broker. There is Apache ActiveMQ as an open source solution. So you need to connect MSSql Server to your broker and use JMS implementation to listen & retrieve notifications in java from the broker.
The question now is : is it possible to connect MSSql Server to any broker ? I will search for that and comeback to you.