Question

We have constants declared in an interface in our application like this.

public interface IConstants {     public static final String FEVER='6';     public static final String HEADACHE='8'; } 

We now want to populate these constants values (6 and 8) from the database (or application servlet context).

The database values stored in a look up table are already available in the application session (in servlet context attribute) and hence I don’t have to make a database call every time.

How do we accomplish this?

Answer 1

Given that you don’t want to change the existing code too much, the simplest way would be:

public interface IConstants {     public static final String FEVER = getConstFromDatabase('FEVER');     public static final String HEADACHE = getConstFromDatabase('HEADACHE'); }