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Java > Open Source Codes > de > nava > informa > utils > poller > PollerObserverIF


1 //
2 // Informa -- RSS Library for Java
3 // Copyright (c) 2002 by Niko Schmuck
4 //
5 // Niko Schmuck
6 // http://sourceforge.net/projects/informa
7 // mailto:niko_schmuck@users.sourceforge.net
8 //
9 // This library is free software.
10 //
11 // You may redistribute it and/or modify it under the terms of the GNU
12 // Lesser General Public License as published by the Free Software Foundation.
13 //
14 // Version 2.1 of the license should be included with this distribution in
15 // the file LICENSE. If the license is not included with this distribution,
16 // you may find a copy at the FSF web site at 'www.gnu.org' or 'www.fsf.org',
17 // or you may write to the Free Software Foundation, 675 Mass Ave, Cambridge,
18 // MA 02139 USA.
19 //
20 // This library is distributed in the hope that it will be useful,
21 // but WITHOUT ANY WARRANTY; without even the implied waranty of
22 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 // Lesser General Public License for more details.
24 //
25 // $Id: PollerObserverIF.java,v 1.2 2004/08/24 17:49:14 spyromus Exp $
26 //
27
28 package de.nava.informa.utils.poller;
29
30 import de.nava.informa.core.ChannelIF;
31 import de.nava.informa.core.ItemIF;
32
33 /**
34  * Observer of events outgoing from Poller.
35  *
36  * @author Aleksey Gureev (spyromus@noizeramp.com)
37  */
38 public interface PollerObserverIF {
39   /**
40    * Invoked by Poller when new item is approved for addition. Item is transient
41    * and should be added to specified channel.
42    *
43    * @param item item added.
44    * @param channel destination channel.
45    */
46   void itemFound(ItemIF item, ChannelIF channel);
47
48   /**
49    * Invoked by Poller when poller of the channel failed.
50    *
51    * @param channel channel.
52    * @param e original cause of failure.
53    */
54   void channelErrored(ChannelIF channel, Exception JavaDoc e);
55
56   /**
57    * Invoked when Poller detected changes in channel information (title and etc).
58    *
59    * @param channel channel.
60    */
61   void channelChanged(ChannelIF channel);
62
63   /**
64    * Invoked by Poller when checking of the channel started.
65    *
66    * @param channel channel.
67    */
68   void pollStarted(ChannelIF channel);
69
70   /**
71    * Invoked by Poller when checking of the channel finished successfully.
72    *
73    * @param channel channel.
74    */
75   void pollFinished(ChannelIF channel);
76 }
77
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