/**
    * 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.migrationFromLog4j;
  
  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 TrivialLogbackAppender extends AppenderBase<ILoggingEvent> {
  
    PatternLayoutEncoder encoder;
    
    public PatternLayoutEncoder getEncoder() {
      return encoder;
    }
  
    public void setEncoder(PatternLayoutEncoder encoder) {
      this.encoder = encoder;
    }
  
    @Override
    public void start() {
      if (this.encoder == null) {
        addError("No encoder set for the appender named [" + name + "].");
        return;
      }
      try {
        encoder.init(System.out);
      } catch (IOException e) {
      }
      super.start();
    }
  
    @Override
    protected void append(ILoggingEvent loggingevent) {
      // note that AppenderBase.doAppend will invoke this method only if
      // this appender was successfully started.
      try {
        this.encoder.doEncode(loggingevent);
      } catch (IOException e) {
        // we can't do much with the exception except halting
        super.stop();
        addError("Failed to write to the console");
      }
    }
  
  }