/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2011, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package chapters.appenders;
  
  import java.io.IOException;
  
  import ch.qos.logback.classic.encoder.PatternLayoutEncoder;
  import ch.qos.logback.classic.spi.ILoggingEvent;
  import ch.qos.logback.core.AppenderBase;
  
  
  public class CountingConsoleAppender extends AppenderBase<ILoggingEvent> {
    static int DEFAULT_LIMIT = 10;
    int counter = 0;
    int limit = DEFAULT_LIMIT;
    
    PatternLayoutEncoder encoder;
    
    public CountingConsoleAppender() {
    }
  
    public void setLimit(int limit) {
      this.limit = limit;
    }
  
    public int getLimit() {
      return limit;
    }  
    
    @Override
    public void start() {
      if (this.encoder == null) {
        addError("No layout set for the appender named ["+ name +"].");
        return;
      }
      
      try {
        encoder.init(System.out);
      } catch (IOException e) {
      }
      super.start();
    }
  
    public void append(ILoggingEvent event) {
      if (counter >= limit) {
        return;
      }
      // output the events as formatted by our layout
      try {
        this.encoder.doEncode(event);
      } catch (IOException e) {
      }
  
      // prepare for next event
      counter++;
    }
  
    public PatternLayoutEncoder getEncoder() {
      return encoder;
    }
  
    public void setEncoder(PatternLayoutEncoder encoder) {
      this.encoder = encoder;
    }
    
    
  }