01: /*
02: * HA-JDBC: High-Availability JDBC
03: * Copyright (c) 2004-2007 Paul Ferraro
04: *
05: * This library is free software; you can redistribute it and/or modify it
06: * under the terms of the GNU Lesser General Public License as published by the
07: * Free Software Foundation; either version 2.1 of the License, or (at your
08: * option) any later version.
09: *
10: * This library is distributed in the hope that it will be useful, but WITHOUT
11: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12: * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
13: * for more details.
14: *
15: * You should have received a copy of the GNU Lesser General Public License
16: * along with this library; if not, write to the Free Software Foundation,
17: * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18: *
19: * Contact: ferraro@users.sourceforge.net
20: */
21: package net.sf.hajdbc.distributable;
22:
23: import java.io.Serializable;
24:
25: import net.sf.hajdbc.DatabaseCluster;
26: import net.sf.hajdbc.StateManager;
27:
28: /**
29: * @author Paul Ferraro
30: */
31: public interface Command<R> extends Serializable {
32: /**
33: * Execute this command on the specified database cluster.
34: * @param <D> either java.sql.Driver or javax.sql.DataSource
35: * @param databaseCluster a database cluster
36: * @param stateManager a state manager
37: */
38: public <D> R execute(DatabaseCluster<D> databaseCluster,
39: StateManager stateManager);
40:
41: public R unmarshalResult(Object object);
42:
43: public Object marshalResult(R result);
44: }
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