LeechCraft  0.6.70-13729-g7046a9d2a7
Modular cross-platform feature rich live environment.
dblock.cpp
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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> LC::Util::DBLock::LockedBases_;
40 QMutex LC::Util::DBLock::LockedMutex_;
41 
42 LC::Util::DBLock::DBLock (QSqlDatabase& database)
43 : Database_ (database)
44 {
45 }
46 
48 {
49  if (!Initialized_)
50  return;
51 
52  if (Good_ ? !Database_.commit () : !Database_.rollback ())
53  DumpError (Database_.lastError ());
54 
55  {
56  QMutexLocker locker (&LockedMutex_);
57  LockedBases_.remove (Database_.connectionName ());
58  }
59 }
60 
62 {
63  {
64  QMutexLocker locker (&LockedMutex_);
65  const auto& conn = Database_.connectionName ();
66  if (LockedBases_.contains (conn))
67  return;
68  LockedBases_ << conn;
69  }
70 
71  if (!Database_.transaction ())
72  {
73  DumpError (Database_.lastError ());
74  throw std::runtime_error ("Could not start transaction");
75  }
76  Initialized_ = true;
77 }
78 
80 {
81  Good_ = true;
82 }
83 
84 void LC::Util::DBLock::DumpError (const QSqlError& lastError)
85 {
86  qWarning () << lastError.text () << "|"
87  << lastError.type ();
88 }
89 
90 void LC::Util::DBLock::DumpError (const QSqlQuery& lastQuery)
91 {
92  qWarning () << "query:" << lastQuery.lastQuery ();
93  DumpError (lastQuery.lastError ());
94  qWarning () << "bound values:" << lastQuery.boundValues ();
95 }
96 
97 void LC::Util::DBLock::Execute (QSqlQuery& query)
98 {
99  if (query.exec ())
100  return;
101 
102  DumpError (query);
103  throw std::runtime_error ("Query execution failed.");
104 }
105 
UTIL_DB_API void Init()
Initializes the transaction.
Definition: dblock.cpp:61
static UTIL_DB_API void DumpError(const QSqlError &error)
Dumps the error to the qWarning() stream.
Definition: dblock.cpp:84
static UTIL_DB_API void Execute(QSqlQuery &query)
Tries to execute the given query.
Definition: dblock.cpp:97
UTIL_DB_API ~DBLock()
Destructor.
Definition: dblock.cpp:47
UTIL_DB_API void Good()
Notifies the lock about successful higher-level operations.
Definition: dblock.cpp:79
DBLock(const DBLock &)=delete