If you run hive as a server, what are the available mechanism for connecting it from application?

There are following ways by which you can connect with the Hive Server: 

1. Thrift Client: Using thrift you can call hive commands from a various programming languages e.g. C++, Java, PHP, Python and Ruby.
2. JDBC Driver : It supports the Type 4 (pure Java) JDBC Driver.  
3. ODBC Driver: It supports ODBC protocol.