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comparison Core/SQLite/Transaction.h @ 0:3959d33612cc

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 19 Jul 2012 14:32:22 +0200
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1 /**
2 * Palantir - A Lightweight, RESTful DICOM Store
3 * Copyright (C) 2012 Medical Physics Department, CHU of Liege,
4 * Belgium
5 *
6 * This program is free software: you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 **/
19
20
21 #pragma once
22
23 #include "Connection.h"
24
25 namespace Palantir
26 {
27 namespace SQLite
28 {
29 class Transaction : public boost::noncopyable
30 {
31 private:
32 Connection& connection_;
33
34 // True when the transaction is open, false when it's already been committed
35 // or rolled back.
36 bool isOpen_;
37
38 public:
39 explicit Transaction(Connection& connection);
40 ~Transaction();
41
42 // Returns true when there is a transaction that has been successfully begun.
43 bool IsOpen() const { return isOpen_; }
44
45 // Begins the transaction. This uses the default sqlite "deferred" transaction
46 // type, which means that the DB lock is lazily acquired the next time the
47 // database is accessed, not in the begin transaction command.
48 void Begin();
49
50 // Rolls back the transaction. This will happen automatically if you do
51 // nothing when the transaction goes out of scope.
52 void Rollback();
53
54 // Commits the transaction, returning true on success.
55 void Commit();
56 };
57 }
58 }