/**
    * 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 ch.qos.logback.core.status;
  
  import ch.qos.logback.core.spi.ContextAwareBase;
  import ch.qos.logback.core.spi.LifeCycle;
  import ch.qos.logback.core.util.StatusPrinter;
  
  import java.util.List;
  
  /**
   * Print all new incoming status messages on the console.
   *
   * @author Ceki Gülcü
   */
  public class OnConsoleStatusListener extends ContextAwareBase implements StatusListener, LifeCycle {
  
  
    static final long DEFAULT_RESTROSPECTIVE = 300;
    boolean isStarted = false;
    long retrospective = DEFAULT_RESTROSPECTIVE;
  
    private void print(Status status) {
      StringBuilder sb = new StringBuilder();
      StatusPrinter.buildStr(sb, "", status);
      System.out.print(sb);
    }
  
    public void addStatusEvent(Status status) {
      if (!isStarted)
        return;
      print(status);
    }
  
    /**
     * Print status messages retrospectively
     */
    private void retrospectivePrint() {
      long now = System.currentTimeMillis();
      StatusManager sm = context.getStatusManager();
      List<Status> statusList = sm.getCopyOfStatusList();
      for (Status status : statusList) {
        long timestamp = status.getDate();
        if (now - timestamp < retrospective) {
          print(status);
        }
      }
    }
  
    public void start() {
      isStarted = true;
      if (retrospective > 0) {
        retrospectivePrint();
      }
    }
  
    public void setRetrospective(long retrospective) {
      this.retrospective = retrospective;
    }
  
    public long getRetrospective() {
      return retrospective;
    }
  
    public void stop() {
      isStarted = false;
    }
  
    public boolean isStarted() {
      return isStarted;
    }
  }