001    /**
002     *   GRANITE DATA SERVICES
003     *   Copyright (C) 2006-2013 GRANITE DATA SERVICES S.A.S.
004     *
005     *   This file is part of the Granite Data Services Platform.
006     *
007     *   Granite Data Services is free software; you can redistribute it and/or
008     *   modify it under the terms of the GNU Lesser General Public
009     *   License as published by the Free Software Foundation; either
010     *   version 2.1 of the License, or (at your option) any later version.
011     *
012     *   Granite Data Services is distributed in the hope that it will be useful,
013     *   but WITHOUT ANY WARRANTY; without even the implied warranty of
014     *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
015     *   General Public License for more details.
016     *
017     *   You should have received a copy of the GNU Lesser General Public
018     *   License along with this library; if not, write to the Free Software
019     *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
020     *   USA, or see <http://www.gnu.org/licenses/>.
021     */
022    package org.granite.tide.data;
023    
024    
025    /**
026     *  Interface for data update dispatchers.
027     *  The dispatch is a three step process :
028     * 
029     *      <ul>
030     *  <li>Initialization in the constructor (specific for each implementation), at initialization of <code>DataContext</code></li>
031     *  <li><code>observe()</code> builds the server selector depending on the data that are processed</li>
032     *  <li><code>publish()</code> handles the actual publishing</li>
033     *  </ul>
034     * 
035     *  @see DataContext
036     * 
037     *  @author William Drai
038     */
039    public interface DataDispatcher {
040            
041            public static final String TIDE_DATA_SUBTOPIC = "tideDataTopic";
042            public static final String GDS_SESSION_ID = "GDSSessionID";
043            public static final String TIDE_DATA_TYPE_KEY = "type";
044            public static final String TIDE_DATA_TYPE_VALUE = "DATA";
045            public static final String SERVER_DISPATCHER_GDS_SESSION_ID = "__GDS_SERVER_DISPATCHER__";
046    
047            public void observe();
048            
049            public void publish(Object[][] dataUpdates);
050    }