// ServerContext serv_context;
serv_context.addInfoListener(new MyLogListener(ll_out_file));

// The following code shows an example of processing those messages:
class MyLogListener implements LogListener {
    FileOutputStream _out_file; 
    public TestLogListener(FileOutputStream out_file) {
        _out_file = out_file;
    }

    public void messageLogged(ServerContext sc, LogMessage msg) {
        String type;
        String user;

        try {
            if (msg.getType() == LogMessage.ERROR) {
                type = "ERROR";
            } else if (msg.getType() == LogMessage.WARNING) {
                type = "WARNING";
            } else if (msg.getType() == LogMessage.INFO) {
                type = "INFO";
            } else {
                type = "UNKNOWN!!!";
            }

            user = msg.getUser();
            if (user == null) {
                user = "NULL";
            }
            _out_file.write(("Caught msg type="
                + type
                + " user=" + user
                + " text=" +msg.getText()
                + "\n").getBytes()
            );
            _out_file.flush();
        } 
        catch(Exception e) {
            
            // if we print the exception from processing an info message,
            // we may recurse indefinitely
            if (msg.getType() != LogMessage.ERROR) {
                // Print some error output to the MobiLink log.
                e.printStackTrace();
            }
        }
    }
}