Extending LogManager and Logger

Question

I'm trying to sub-class Logger and LogManager. In a very old thread someone suggested...
You should make two classes like this:
public class TSPPXMLLogger extends Logger {
protected TSPPXMLLogger(String loggerName) {
super(loggername);
// custom log methods etc.
public class TSPPLogManager extends LogManager {
public synchronized Logger getLogger(String name) {
// check if the logger is in the cache
Logger logger = super.getLogger(name);
if ( logger == null ) {
logger = new TSPPXMLLogger(name);
// add the logger to the cache
super.addLogger(logger);
return logger;
I've tried doing exactly what this person suggested above. I created my own Logger and LogManager subclasses, MyLogger and MyLogManager respectively. I configured Java using the property java.util.logging.manager=com.mycompany.MyLogManager. Because of this any call to LogManager.getLogManager() will return an instance of MyLogManager. This is great!
The MyLogManager.getLogger() method, as suggested above, also always returns a non-null value. I want it to always return a non-null value because the method Logger.getLogger() will return an instance of Logger, not MyLogger, if the named logger doesn't already exist.
I thought things would be great but then discovered that none of my logging statements were being output. Further examination showed that the reason was because no root logger of type LogManager.RootLogger existed. The cause was the fact that LogManager.getLogManager().getLogger() always returned a non-null value.
So my question is, due to the fact that the Logger class can new up instances of itself in its Logger.getLogger() method how can I make sure that anyone using the super classes of LogManager and Logger will always get one of my derived classes?

Answer 1

As i am using my own classloader which changes every instance of Socket to SocketProxy and ServerSocket to ServerSocketProxy (using a bytecode modification tool), and because the accept() return is of type Socket (and not SocketProxy) thats why i think it gives me error. (It loads some classes but gives error when accept() is called)