ormhandler.cpp
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/* ****************************************************************************
* Copyright 2019 Open Systems Development BV *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the "Software"), *
* to deal in the Software without restriction, including without limitation *
* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
* and/or sell copies of the Software, and to permit persons to whom the *
* Software is furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included in *
* all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR *
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER *
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
* DEALINGS IN THE SOFTWARE. *
* ***************************************************************************/
#include "ormhandler.h"
#include "dcxmlconfig.h"
#include "log.h"
#include "dbrelation.h"
#include "threadcontext.h"
#include <QSqlRecord>
#include <QSqlField>
#include <QSqlRelation>
#include <QSqlIndex>
#include <QtDebug>
using namespace osdev::components;
typedef QList<DbRelation*> Relations;
OrmHandler::OrmHandler(QObject *_parent)
: QObject( _parent )
, m_qhOrmTables()
, m_dbConnection()
, m_className( "OrmHandler" )
{
m_dbConnection.setCredentials( DCXmlConfig::Instance().getDbCredentials() );
// Check if a watchdog is required and connect those. If a database goes offline, all data should be redirected to the TransQueue.
if( DCXmlConfig::Instance().getEnableDbWatchDog() )
{
// Start the watchdog and set the interval.
m_dbConnection.startDbWatchDog( DCXmlConfig::Instance().getDbCheckInterval() );
}
}
OrmHandler::~OrmHandler()
{
}
void OrmHandler::start()
{
// connect the database.
LogInfo( m_className, "Connecting to database.." );
if( m_dbConnection.connectDatabase() )
{
// Read configuration
QStringList tableList = DCXmlConfig::Instance().getOrmTables();
if( 0 == tableList.count() )
{
tableList = m_dbConnection.getTableNames();
}
LogInfo( m_className,
QString("Connected to database %1") .arg( m_dbConnection.getDatabaseName() ) );
// First make sure we have all tables created, before we create all relations...
for( const QString& tableName : tableList )
{
createOrmObject( tableName );
}
// -------------------------------------------------
// Create all relations on the same list of tables.
for( const QString& tableName : tableList )
{
QString status;
// If creation of the object succeeded it is safe to add the relations.
switch( createOrmRelation( tableName ) )
{
case OrmStatus::OrmStatusFailed:
status = "failed.";
break;
case OrmStatus::OrmStatusNoRelation:
status = "not created (As there are none.)";
break;
case OrmStatus::OrmStatusSuccess:
status = "succeeded.";
break;
}
LogInfo( "[OrmHandler::start]", QString( "Creation of ORM Relation for table : %1 %2" ).arg( tableName ).arg( status ) );
}
}
else
{
LogInfo( m_className,
QString( "Connection to database %1 failed with error : %2" )
.arg( m_dbConnection.getDatabaseName() )
.arg( m_dbConnection.getLastError() ) );
//@todo : This will produce a SegmentationFault for now due to mutlihreaded pluginloading.
// This should be fixed in future releases by implementing a nice rolldown with locking
// mechanisms and shutdown events.
QMetaObject::invokeMethod( qApp, "quit", Qt::QueuedConnection );
}
}
bool OrmHandler::createOrmObject( const QString& _table )
{
bool l_result = false;
OrmTable *pModel = new OrmTable( m_dbConnection, this );
if ( pModel )
{
pModel->setTrackField( DCXmlConfig::Instance().getRecordTrackFieldName() );
pModel->setTable( m_dbConnection.quoteTableName( _table ) );
m_qhOrmTables.insert( _table, pModel );
// cascade connect the rejectedsignal.
connect( pModel, &OrmTable::signalRejectedData, this, &OrmHandler::signalRejectedData );
l_result = true;
}
return l_result;
}
OrmHandler::OrmStatus OrmHandler::createOrmRelation( const QString& _table )
{
OrmStatus ormResult = OrmStatus::OrmStatusFailed;
Relations lstRelations = m_dbConnection.getRelationByTableName( _table );
if( lstRelations.isEmpty() )
{
return OrmStatus::OrmStatusNoRelation;
}
// Each relation found should be added to the table.
for( auto& relation : lstRelations )
{
// Save the relation to the table administration.
m_qhOrmTables.value( _table )->saveRelation( relation->constraintName(), relation );
// Create a QSortProxyFilterModel and add to the table.
QSortFilterProxyModel *pModel = new QSortFilterProxyModel();
pModel->setSourceModel( m_qhOrmTables.value( relation->foreignTable() ) );
m_qhOrmTables.value( _table )->setRelatedTable( relation->foreignTable(), pModel );
}
// Check if the number of relations found is equal to the number of relations
// added to the ORM-table.
if( lstRelations.count() == m_qhOrmTables.value( _table )->numberOfRelations() )
{
ormResult = OrmStatus::OrmStatusSuccess;
}
else
{
LogDebug( "[OrmHandler::createOrmRelation]", QString( "Number of relations : %1 => Number of relations registered : %2" ).arg( lstRelations.count() ).arg( m_qhOrmTables.value( _table )->numberOfRelations() ) );
ormResult = OrmStatus::OrmStatusFailed;
}
return ormResult;
}
void OrmHandler::receiveData( const QSharedPointer<ORMRelData>& dataContainer )
{
ThreadContextScope tcs( dataContainer->traceId() );
LogDebug( "[OrmHandler::receiveData]", dataContainer->asString() );
// Check if we have an actual database running. *if* it died, redirect immediately
if( m_dbConnection.isOpen() )
{
if( m_qhOrmTables.contains( dataContainer->getMainTableName() ) )
{
LogDebug("[OrmHandler::receiveData]", QString("Table entry found for %1").arg( dataContainer->getMainTableName() ) );
m_qhOrmTables.value( dataContainer->getMainTableName() )->writeData( dataContainer );
}
else
{
LogWarning("[OrmHandler::receiveData]", QString("No table entry found for %1").arg( dataContainer->getMainTableName() ) );
emit signalRejectedData( dataContainer );
}
}
else
{
emit signalRejectedData( dataContainer );
}
}
QString OrmHandler::getPrimaryKey( const QString& tableName ) const
{
if( m_qhOrmTables.contains( tableName ) )
{
return m_qhOrmTables.value( tableName )->primaryKey().name();
}
return QString();
}