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.sql;
22:
23: import java.util.Map;
24: import java.util.SortedMap;
25: import java.util.TreeMap;
26:
27: import net.sf.hajdbc.Database;
28:
29: /**
30: * @author Paul Ferraro
31: *
32: */
33: public class DriverWriteInvocationStrategy<D, T, R> implements
34: InvocationStrategy<D, T, R> {
35: /**
36: * @see net.sf.hajdbc.sql.InvocationStrategy#invoke(net.sf.hajdbc.sql.SQLProxy, net.sf.hajdbc.sql.Invoker)
37: */
38: @Override
39: public R invoke(SQLProxy<D, T> proxy, Invoker<D, T, R> invoker)
40: throws Exception {
41: SortedMap<Database<D>, R> map = this .invokeAll(proxy, invoker);
42:
43: return map.get(map.firstKey());
44: }
45:
46: protected SortedMap<Database<D>, R> invokeAll(SQLProxy<D, T> proxy,
47: Invoker<D, T, R> invoker) throws Exception {
48: SortedMap<Database<D>, R> resultMap = new TreeMap<Database<D>, R>();
49:
50: for (Map.Entry<Database<D>, T> entry : proxy.entries()) {
51: Database<D> database = entry.getKey();
52:
53: resultMap.put(database, invoker.invoke(database, entry
54: .getValue()));
55: }
56:
57: return resultMap;
58: }
59: }
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