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}