001    package org.LiveGraph.dataCache;
002    
003    
004    /**
005     * Defines an {@link UpdateInvoker}-observer.
006     * 
007     * <p style="font-size:smaller;">This product includes software developed by the
008     *    <strong>LiveGraph</strong> project and its contributors.<br />
009     *    (<a href="http://www.live-graph.org" target="_blank">http://www.live-graph.org</a>)<br />
010     *    Copyright (c) 2007 G. Paperin.<br />
011     *    All rights reserved.
012     * </p>
013     * <p style="font-size:smaller;">File: UpdateInvokerObserver.java</p> 
014     * <p style="font-size:smaller;">Redistribution and use in source and binary forms, with or
015     *    without modification, are permitted provided that the following terms and conditions are met:
016     * </p>
017     * <p style="font-size:smaller;">1. Redistributions of source code must retain the above
018     *    acknowledgement of the LiveGraph project and its web-site, the above copyright notice,
019     *    this list of conditions and the following disclaimer.<br />
020     *    2. Redistributions in binary form must reproduce the above acknowledgement of the
021     *    LiveGraph project and its web-site, the above copyright notice, this list of conditions
022     *    and the following disclaimer in the documentation and/or other materials provided with
023     *    the distribution.<br />
024     *    3. All advertising materials mentioning features or use of this software or any derived
025     *    software must display the following acknowledgement:<br />
026     *    <em>This product includes software developed by the LiveGraph project and its
027     *    contributors.<br />(http://www.live-graph.org)</em><br />
028     *    4. All advertising materials distributed in form of HTML pages or any other technology
029     *    permitting active hyper-links that mention features or use of this software or any
030     *    derived software must display the acknowledgment specified in condition 3 of this
031     *    agreement, and in addition, include a visible and working hyper-link to the LiveGraph
032     *    homepage (http://www.live-graph.org).
033     * </p>
034     * <p style="font-size:smaller;">THIS SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY
035     *    OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
036     *    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT SHALL
037     *    THE AUTHORS, CONTRIBUTORS OR COPYRIGHT  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
038     *    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING  FROM, OUT OF OR
039     *    IN CONNECTION WITH THE SOFTWARE OR THE USE OR  OTHER DEALINGS IN THE SOFTWARE.
040     * </p>
041     * 
042     * @author Greg Paperin (<a href="http://www.paperin.org" target="_blank">http://www.paperin.org</a>)
043     * @version {@value org.LiveGraph.LiveGraph#version}
044     */
045    public interface UpdateInvokerObserver {
046    
047            public void timerTick(UpdateInvoker source);
048            public void updateStarted(UpdateInvoker source);
049            public void updateFinished(UpdateInvoker source, String errorMsg);
050    }