This string includes the properties used to connect with Kerberos authentication.

jdbc:datadirect:mongodb://host:port;AuthenticationMethod=kerberos;DatabaseName=database;
ServicePrincipalName=principal_name;User=username;[property=value[;...]];

where:

host

specifies the name or the IP address of the MongoDB server to which you want to connect. For example, myserver.

port

specifies the port number of the server listener. The default is 27017.

database
(optional) specifies the name of the database to which you want to connect. This value is used as the default qualifier for unqualified table names in SQL queries.
Important: This value is case-insensitive if you have access privileges to query the list of databases on the server. If you do not have access, this value is case-sensitive.
principal_name
(optional) if the default value built by the driver does not match the service principal name registered with the KDC, specify the three-part service principal name. By default, the driver builds the ServicePrincipalName by concatenating the service name mongodb, the fully qualified domain name (FQDN) as specified with the HostName property, and the default realm name as specified in the Kerberos configuration file.
user
(optional) specifies the user name that is used to connect to the MongoDB database. For example, jsmith.
Note: The User property is not required to be stored in the connection string. This value can also be passed separately by the application.
property=value
specifies connection property settings. Multiple properties are separated by a semi-colon.

The following example connection string includes the properties required for connecting with Kerberos authentication.

Connection conn = DriverManager.getConnection
  ("jdbc:datadirect:mongodb://myserver:27017;AuthenticationMethod=kerberos;
         DatabaseName=mydb;user=jsmith;");