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208 lines (162 loc) · 4.66 KB
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/* Copyright (c) 2015-2019, AOYAMA Kazuharu
* All rights reserved.
*
* This software may be used and distributed according to the terms of
* the New BSD License, which is incorporated herein by reference.
*/
#include "tdatabasecontext.h"
#include "tkvsdatabasepool.h"
#include "tsqldatabasepool.h"
#include "tsystemglobal.h"
#include <QSqlDatabase>
#include <QThreadStorage>
#include <QtCore>
#include <TKvsDriver>
#include <TCache>
#include <TWebApplication>
#include <ctime>
namespace {
// Stores a pointer to current database context into TLS
// - qulonglong type to prevent qThreadStorage_deleteData() function to work
QThreadStorage<qulonglong> databaseContextPtrTls;
QSqlDatabase invalidDb;
}
/*!
\class TDatabaseContext
\brief The TDatabaseContext class is the base class of contexts for
database access.
*/
TDatabaseContext::TDatabaseContext() :
sqlDatabases(),
kvsDatabases()
{
}
TDatabaseContext::~TDatabaseContext()
{
release();
delete cachep;
}
QSqlDatabase &TDatabaseContext::getSqlDatabase(int id)
{
if (id < 0) {
return invalidDb; // invalid database
}
if (id >= Tf::app()->sqlDatabaseSettingsCount()) {
throw RuntimeException("error database id", __FILE__, __LINE__);
}
TSqlTransaction &tx = sqlDatabases[id];
QSqlDatabase &db = tx.database();
if (db.isValid() && tx.isActive()) {
return db;
}
int n = 0;
do {
if (!db.isValid()) {
db = TSqlDatabasePool::instance()->database(id);
}
if (tx.begin()) {
break;
}
TSqlDatabasePool::instance()->pool(db, true);
} while (++n < 2); // try two times
idleElapsed = (uint)std::time(nullptr);
return db;
}
void TDatabaseContext::releaseSqlDatabases()
{
rollbackTransactions();
sqlDatabases.clear();
}
TKvsDatabase &TDatabaseContext::getKvsDatabase(Tf::KvsEngine engine)
{
TKvsDatabase &db = kvsDatabases[(int)engine];
if (!db.isValid()) {
db = TKvsDatabasePool::instance()->database(engine);
}
idleElapsed = (uint)std::time(nullptr);
return db;
}
void TDatabaseContext::releaseKvsDatabases()
{
for (QMap<int, TKvsDatabase>::iterator it = kvsDatabases.begin(); it != kvsDatabases.end(); ++it) {
TKvsDatabasePool::instance()->pool(it.value());
}
kvsDatabases.clear();
}
void TDatabaseContext::release()
{
// Releases all SQL database sessions
releaseSqlDatabases();
// Releases all KVS database sessions
releaseKvsDatabases();
idleElapsed = 0;
}
void TDatabaseContext::setTransactionEnabled(bool enable, int id)
{
if (id < 0) {
Tf::error("Invalid database ID: {}", id);
return;
}
return sqlDatabases[id].setEnabled(enable);
}
void TDatabaseContext::commitTransactions()
{
for (QMap<int, TSqlTransaction>::iterator it = sqlDatabases.begin(); it != sqlDatabases.end(); ++it) {
TSqlTransaction &tx = it.value();
tx.commit();
TSqlDatabasePool::instance()->pool(tx.database());
}
}
bool TDatabaseContext::commitTransaction(int id)
{
bool res = false;
if (id < 0 || id >= sqlDatabases.count()) {
Tf::error("Failed to commit transaction. Invalid database ID: {}", id);
return res;
}
TSqlTransaction &tx = sqlDatabases[id];
res = tx.commit();
TSqlDatabasePool::instance()->pool(sqlDatabases[id].database());
return res;
}
void TDatabaseContext::rollbackTransactions()
{
for (QMap<int, TSqlTransaction>::iterator it = sqlDatabases.begin(); it != sqlDatabases.end(); ++it) {
TSqlTransaction &tx = it.value();
tx.rollback();
TSqlDatabasePool::instance()->pool(tx.database(), true);
}
}
bool TDatabaseContext::rollbackTransaction(int id)
{
bool res = false;
if (id < 0 || id >= sqlDatabases.count()) {
Tf::error("Failed to rollback transaction. Invalid database ID: {}", id);
return res;
}
res = sqlDatabases[id].rollback();
TSqlDatabasePool::instance()->pool(sqlDatabases[id].database(), true);
return res;
}
int TDatabaseContext::idleTime() const
{
return (idleElapsed > 0) ? (uint)std::time(nullptr) - idleElapsed : -1;
}
TDatabaseContext *TDatabaseContext::currentDatabaseContext()
{
return reinterpret_cast<TDatabaseContext *>(databaseContextPtrTls.localData());
}
void TDatabaseContext::setCurrentDatabaseContext(TDatabaseContext *context)
{
if (context && databaseContextPtrTls.localData()) {
tSystemWarn("Duplicate set : setCurrentDatabaseContext()");
}
databaseContextPtrTls.setLocalData((qulonglong)context);
}
TCache *TDatabaseContext::cache()
{
if (!cachep) {
cachep = new TCache;
}
return cachep;
}