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1   /**
2    * LOGBack: the reliable, fast and flexible logging library for Java.
3    *
4    * Copyright (C) 1999-2006, QOS.ch
5    *
6    * This library is free software, you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public License as
8    * published by the Free Software Foundation.
9    */
10  package ch.qos.logback.core.status;
11  
12  import java.util.List;
13  
14  /**
15   * Internal error messages (statii) are managed by instances of this interface.
16   * 
17   * @author Ceki Gulcu
18   */
19  public interface StatusManager {
20  
21    /**
22     * Add a new status message.
23     * 
24     * @param status
25     */
26    public void add(Status status);
27  
28    /**
29     * Obtain a copy of the status list maintained by this StatusManager.
30     * 
31     * @return
32     */
33    public List<Status> getCopyOfStatusList();
34  
35    /**
36     * Return the highest level of all the statii.
37     * 
38     * @return
39     */
40    public int getLevel();
41  
42    /**
43     * Return the number of status entries.
44     * 
45     * @return
46     */
47    public int getCount();
48  
49    /**
50     * Add a status listener.
51     * @param listener
52     */
53    public void add(StatusListener listener);
54    
55    /**
56     * Remove a status listener.
57     * 
58     * @param listener
59     */
60    public void remove(StatusListener listener);
61  
62  
63    /**
64     * Clear the list of status messages.
65     */
66    public void clear();
67  
68    
69    /**
70     * Obtain a copy of the status listener list maintained by this StatusManager
71     * 
72     * @return
73     */
74    public List<StatusListener> getCopyOfStatusListenerList();
75  
76  }