Logging Level Manipulation : Log « Language Basics « Java

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Logging Level Manipulation

    
// : c15:LoggingLevelManipulation.java
//From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
//www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.util.logging.Level;
import java.util.logging.Logger;

public class LoggingLevelManipulation {
  
  private static Logger lgr = Logger.getLogger("com"), lgr2 = Logger
      .getLogger("com.bruceeckel"), util = Logger
      .getLogger("com.bruceeckel.util"), test = Logger
      .getLogger("com.bruceeckel.test"), rand = Logger
      .getLogger("random");

  static void printLogMessages(Logger logger) {
    logger.finest(logger.getName() + " Finest");
    logger.finer(logger.getName() + " Finer");
    logger.fine(logger.getName() + " Fine");
    logger.config(logger.getName() + " Config");
    logger.info(logger.getName() + " Info");
    logger.warning(logger.getName() + " Warning");
    logger.severe(logger.getName() + " Severe");
  }

  static void logMessages() {
    printLogMessages(lgr);
    printLogMessages(lgr2);
    printLogMessages(util);
    printLogMessages(test);
    printLogMessages(rand);
  }

  static void printLevels() {
    System.out.println(" -- printing levels -- " + lgr.getName() + " : "
        + lgr.getLevel() + " " + lgr2.getName() + " : "
        + lgr2.getLevel() + " " + util.getName() + " : "
        + util.getLevel() + " " + test.getName() + " : "
        + test.getLevel() + " " + rand.getName() + " : "
        + rand.getLevel());
  }

  public static void main(String[] args) {
    printLevels();
    lgr.setLevel(Level.SEVERE);
    printLevels();
    System.out.println("com level: SEVERE");
    logMessages();
    util.setLevel(Level.FINEST);
    test.setLevel(Level.FINEST);
    rand.setLevel(Level.FINEST);
    printLevels();
    System.out.println("individual loggers set to FINEST");
    logMessages();
    lgr.setLevel(Level.FINEST);
    printLevels();
    System.out.println("com level: FINEST");
    logMessages();
  }
} ///:~



           
         
    
    
    
  

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