Custom Logger:

package myapp.misc;

import org.apache.log4j.ConsoleAppender;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.PatternLayout;
import org.apache.log4j.RollingFileAppender;

public class CustomLogger {

    private static String BASE_PATH = "/var/log/custom/";
    private static String CLASS_NAME = "myapp.misc.CustomLogger";
   
    private static Logger customLogger1;
    static {
        init();
    }

    public static void logDebug(String msg) {
        customLogger1.log(CLASS_NAME, Level.DEBUG, msg, null);
    }

    public static void logInfo(String msg) {
        customLogger1.log(CLASS_NAME, Level.INFO, msg, null);
    }
   
    public static void logWarn(String msg) {
        customLogger1.log(CLASS_NAME, Level.WARN, msg, null);
    }
   
    public static void logError(String msg) {
        customLogger1.log(CLASS_NAME, Level.ERROR, msg, null);
    }

    public static void logError(String msg, Throwable throwable) {
        customLogger1.log(CLASS_NAME, Level.ERROR, msg, throwable);
    }

    private static void init() {
        customLogger1 = Logger.getLogger(CustomLogger.class);

        if (customLogger1.getAppender("RollingFileAppender_custom1") == null) {
            RollingFileAppender rollingFileAppender = new RollingFileAppender();
            rollingFileAppender.setName("RollingFileAppender_custom1");
            rollingFileAppender.setFile(BASE_PATH + "catalog.log");
            rollingFileAppender.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss,SSS/zzz} [%t] %5p [%C %M() : line %L] :: %m%n"));
            rollingFileAppender.setThreshold(Level.INFO);
            rollingFileAppender.setAppend(true);
            rollingFileAppender.setMaxFileSize("50MB");
            rollingFileAppender.setMaxBackupIndex(100);
            rollingFileAppender.activateOptions();

            customLogger1.addAppender(rollingFileAppender);
        }
        
        if (customLogger1.getAppender("RollingFileAppender_custom1_error") == null) {
            RollingFileAppender rollingFileAppenderError = new RollingFileAppender();
            rollingFileAppenderError.setName("RollingFileAppender_custom1_error");
            rollingFileAppenderError.setFile(BASE_PATH + "catalog_error.log");
            rollingFileAppenderError.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss,SSS/zzz} [%t] %5p [%C %M() : line %L] :: %m%n"));
            rollingFileAppenderError.setThreshold(Level.WARN);
            rollingFileAppenderError.setAppend(true);
            rollingFileAppenderError.setMaxFileSize("50MB");
            rollingFileAppenderError.setMaxBackupIndex(100);
            rollingFileAppenderError.activateOptions();
            customLogger1.addAppender(rollingFileAppenderError);           
        }
       
        if (customLogger1.getAppender("RollingFileAppender_custom1_console") == null) {
            ConsoleAppender consoleAppender = new ConsoleAppender();
            consoleAppender.setName("RollingFileAppender_custom1_console");
            consoleAppender.setLayout(new PatternLayout("%d{yyyy-MM-dd HH:mm:ss,SSS/zzz} [%t] %5p [%C %M() : line %L] :: %m%n"));
            consoleAppender.setThreshold(Level.INFO);
            consoleAppender.activateOptions();
            // customLogger1.addAppender(consoleAppender);
        }
    }
   
}