How to change the state of a singleton in runtime
- by user34401
Consider I am going to write a simple file based logger AppLogger to be used in my apps, ideally it should be a singleton so I can call it via
public class AppLogger {
public static String file = "..";
public void logToFile() {
// Write to file
}
public static log(String s) {
AppLogger.getInstance().logToFile(s);
}
}
And to use it
AppLogger::log("This is a log statement");
The problem is, what is the best time I should provide the value of file since it is a just a singleton?
Or how to refactor the above code (or skip using singleton) so I can customize the log file path? (Assume I don't need to write to multiple at the same time)
p.s. I know I can use library e.g. log4j, but consider it is just a design question, how to refactor the code above?
