001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (c) 2004-2007 Paul Ferraro
004 * 
005 * This library is free software; you can redistribute it and/or modify it 
006 * under the terms of the GNU Lesser General Public License as published by the 
007 * Free Software Foundation; either version 2.1 of the License, or (at your 
008 * option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful, but WITHOUT
011 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
012 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License 
013 * for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this library; if not, write to the Free Software Foundation, 
017 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
018 * 
019 * Contact: ferraro@users.sourceforge.net
020 */
021package net.sf.hajdbc.distributable;
022
023import java.io.Serializable;
024
025import net.sf.hajdbc.DatabaseCluster;
026import net.sf.hajdbc.StateManager;
027
028/**
029 * @author Paul Ferraro
030 */
031public interface Command<R> extends Serializable
032{
033        /**
034         * Execute this command on the specified database cluster.
035         * @param <D> either java.sql.Driver or javax.sql.DataSource
036         * @param databaseCluster a database cluster
037         * @param stateManager a state manager
038         */
039        public <D> R execute(DatabaseCluster<D> databaseCluster, StateManager stateManager);
040        
041        public R unmarshalResult(Object object);
042        
043        public Object marshalResult(R result);
044}