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  1. logback
  2. LOGBACK-1290

Logback don't have advice

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Details

    • Icon: Improvement Improvement
    • Resolution: Unresolved
    • Icon: Minor Minor
    • None
    • 1.3.0-alpha0
    • logback-classic
    • operating system:windows 

      softwar platform:eclipse

    Description

      the logback do not have advice to enhance its input.for example:I want to add some message

      to all the logging message,their is no way to do so.

      I think it can be improve like this:

      1.add class called AdviceModel.java in package ch.qos.logback.classic

      public class AdviceModel {
      private String msg;
      private String FQCN;
      private Level level;
      private Throwable throwable;

      }

      2.add the interface in package ch.qos.logback.classic

      public interface ILogbackAdvice {
      default AdviceModel before(String localFQCN,String msg,Level level){
      return null;
      }
      default void after(String localFQCN,String msg,Level level){
      }
      default AdviceModel before(String localFQCN,String msg,Level level,Throwable t){
      return null;
      }
      default void after(String localFQCN,String msg,Level level,Throwable t){
      }
      }

      3.modify the Logger.java like this:

      add field: 

      private Map<ClassLoader,ILogbackAdvice> adviceMap = new ConcurrentHashMap<>();

      add method:

      private ILogbackAdvice getAdvice(){
      if(adviceMap != null){
      try {
      ILogbackAdvice adviceClassObject = adviceMap.get(Thread.currentThread().getContextClassLoader());
      if(adviceClassObject == null){
      Class<?> adviceClass = Thread.currentThread().getContextClassLoader().loadClass("LogbackAdvice");
      adviceClassObject = (ILogbackAdvice)adviceClass.newInstance();
      adviceMap.put(Thread.currentThread().getContextClassLoader(), adviceClassObject);
      }
      return adviceClassObject;
      } catch (ClassNotFoundException | InstantiationException | IllegalAccessException e) {
      // TODO Auto-generated catch block
      //there is no need for advicing do nothing
      adviceMap = null;
      }
      }
      return null;
      }

      then modify the method like error:

      public void error(String msg) {
      String fqcn = FQCN;
      Level level = Level.ERROR;
      String msgS = msg;
      ILogbackAdvice adviceClassObject = getAdvice();
      if(adviceClassObject != null){
      AdviceModel model = adviceClassObject.before(FQCN,msg,Level.ERROR);
      if(model != null){
      String fqcns = model.getFQCN();
      Level levels = model.getLevel();
      String msgs = model.getMsg();
      fqcn = fqcns != null ? fqcns:fqcn;
      level = levels != null ? levels:level;
      msgS = msgs != null ? msgs:msgS;
      }
      }
      filterAndLog_0_Or3Plus(fqcn, null, level, msgS, null, null);
      if(adviceClassObject != null){
      adviceClassObject.after(FQCN,msg,Level.ERROR);
      }
      }

      I want to improve the logback and commit the branch fixed by me,Please Let me know if you think this improvement is ok(of course I used java8 version features,if i commit the code,i will use java6 version features).

       

      Attachments

        1. AdviceModel.java
          0.8 kB
          xiaohu-zhang
        2. ILogbackAdvice.java
          0.4 kB
          xiaohu-zhang
        3. Logger.java
          33 kB
          xiaohu-zhang

        Activity

          People

            logback-dev Logback dev list
            xiaohu-zhang xiaohu-zhang
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            Dates

              Created:
              Updated: