001/*
002 * HA-JDBC: High-Availability JDBC
003 * Copyright (C) 2012  Paul Ferraro
004 *
005 * This program is free software: you can redistribute it and/or modify
006 * it under the terms of the GNU Lesser General Public License as published by
007 * the Free Software Foundation, either version 3 of the License, or
008 * (at your option) any later version.
009 *
010 * This program is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
013 * GNU Lesser General Public License for more details.
014 *
015 * You should have received a copy of the GNU Lesser General Public License
016 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
017 */
018package net.sf.hajdbc.distributed;
019
020import java.io.IOException;
021import java.io.ObjectInput;
022import java.io.ObjectOutput;
023
024/**
025 * Used by the command dispatcher to handle state transfer between members.
026 * 
027 * @author Paul Ferraro
028 */
029public interface Stateful
030{
031        /**
032         * Returns the state of this object.
033         * @param input
034         * @throws IOException
035         * @throws ClassNotFoundException
036         */
037        void readState(ObjectInput input) throws IOException, ClassNotFoundException;
038        
039        /**
040         * Sets the state of this object.
041         * @param output
042         * @throws IOException
043         */
044        void writeState(ObjectOutput output) throws IOException;
045}