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dblock.cpp
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2  * LeechCraft - modular cross-platform feature rich internet client.
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29 
30 #include "dblock.h"
31 #include <stdexcept>
32 #include <QSqlDatabase>
33 #include <QSqlError>
34 #include <QSqlQuery>
35 #include <QMutexLocker>
36 #include <QtDebug>
37 
38 QSet<QString> LeechCraft::Util::DBLock::LockedBases_;
39 QMutex LeechCraft::Util::DBLock::LockedMutex_;
40 
41 LeechCraft::Util::DBLock::DBLock (QSqlDatabase& database)
42 : Database_ (database)
43 , Good_ (false)
44 , Initialized_ (false)
45 {
46 }
47 
49 {
50  if (!Initialized_)
51  return;
52 
53  if (Good_ ? !Database_.commit () : !Database_.rollback ())
54  DumpError (Database_.lastError ());
55 
56  {
57  QMutexLocker locker (&LockedMutex_);
58  LockedBases_.remove (Database_.connectionName ());
59  }
60 }
61 
63 {
64  {
65  QMutexLocker locker (&LockedMutex_);
66  const auto& conn = Database_.connectionName ();
67  if (LockedBases_.contains (conn))
68  return;
69  LockedBases_ << conn;
70  }
71 
72  if (!Database_.transaction ())
73  {
74  DumpError (Database_.lastError ());
75  throw std::runtime_error ("Could not start transaction");
76  }
77  Initialized_ = true;
78 }
79 
81 {
82  Good_ = true;
83 }
84 
85 void LeechCraft::Util::DBLock::DumpError (const QSqlError& lastError)
86 {
87  qWarning () << lastError.text () << "|"
88  << lastError.type () << "|"
89  << lastError.number ();
90 }
91 
92 void LeechCraft::Util::DBLock::DumpError (const QSqlQuery& lastQuery)
93 {
94  qWarning () << lastQuery.lastQuery ();
95  DumpError (lastQuery.lastError ());
96 }
97 
UTIL_API ~DBLock()
Destructor.
Definition: dblock.cpp:48
DBLock(const DBLock &)=delete
static UTIL_API void DumpError(const QSqlError &error)
Dumps the error to the qWarning() stream.
Definition: dblock.cpp:85
UTIL_API void Good()
Notifies the lock about successful higher-level operations.
Definition: dblock.cpp:80
UTIL_API void Init()
Initializes the transaction.
Definition: dblock.cpp:62