LeechCraft  0.6.70-3565-g2d86529
Modular cross-platform feature rich live environment.
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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 <QVariant>
37 #include <QtDebug>
38 
39 QSet<QString> LeechCraft::Util::DBLock::LockedBases_;
40 QMutex LeechCraft::Util::DBLock::LockedMutex_;
41 
42 LeechCraft::Util::DBLock::DBLock (QSqlDatabase& database)
43 : Database_ (database)
44 , Good_ (false)
45 , Initialized_ (false)
46 {
47 }
48 
50 {
51  if (!Initialized_)
52  return;
53 
54  if (Good_ ? !Database_.commit () : !Database_.rollback ())
55  DumpError (Database_.lastError ());
56 
57  {
58  QMutexLocker locker (&LockedMutex_);
59  LockedBases_.remove (Database_.connectionName ());
60  }
61 }
62 
64 {
65  {
66  QMutexLocker locker (&LockedMutex_);
67  const auto& conn = Database_.connectionName ();
68  if (LockedBases_.contains (conn))
69  return;
70  LockedBases_ << conn;
71  }
72 
73  if (!Database_.transaction ())
74  {
75  DumpError (Database_.lastError ());
76  throw std::runtime_error ("Could not start transaction");
77  }
78  Initialized_ = true;
79 }
80 
82 {
83  Good_ = true;
84 }
85 
86 void LeechCraft::Util::DBLock::DumpError (const QSqlError& lastError)
87 {
88  qWarning () << lastError.text () << "|"
89  << lastError.type () << "|"
90  << lastError.number ();
91 }
92 
93 void LeechCraft::Util::DBLock::DumpError (const QSqlQuery& lastQuery)
94 {
95  qWarning () << "query:" << lastQuery.lastQuery ();
96  DumpError (lastQuery.lastError ());
97  qWarning () << "bound values:" << lastQuery.boundValues ();
98 }
99 
100 void LeechCraft::Util::DBLock::Execute (QSqlQuery& query)
101 {
102  if (query.exec ())
103  return;
104 
105  DumpError (query);
106  throw std::runtime_error ("Query execution failed.");
107 }
108 
UTIL_DB_API ~DBLock()
Destructor.
Definition: dblock.cpp:49
DBLock(const DBLock &)=delete
static UTIL_DB_API void DumpError(const QSqlError &error)
Dumps the error to the qWarning() stream.
Definition: dblock.cpp:86
UTIL_DB_API void Good()
Notifies the lock about successful higher-level operations.
Definition: dblock.cpp:81
UTIL_DB_API void Init()
Initializes the transaction.
Definition: dblock.cpp:63
static UTIL_DB_API void Execute(QSqlQuery &query)
Tries to execute the given query.
Definition: dblock.cpp:100