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akonadi

collectionattributessynchronizationjob.cpp
00001 /*
00002  * Copyright (c) 2009 Volker Krause <vkrause@kde.org>
00003  *
00004  * This library is free software; you can redistribute it and/or
00005  * modify it under the terms of the GNU Lesser General Public
00006  * License as published by the Free Software Foundation; either
00007  * version 2.1 of the License, or (at your option) any later version.
00008  *
00009  * This library is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012  * Lesser General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU Lesser General Public
00015  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
00016  */
00017 
00018 #include "collectionattributessynchronizationjob.h"
00019 #include "dbusconnectionpool.h"
00020 #include "kjobprivatebase_p.h"
00021 
00022 #include <akonadi/agentinstance.h>
00023 #include <akonadi/agentmanager.h>
00024 #include <akonadi/collection.h>
00025 
00026 #include <KDebug>
00027 #include <KLocale>
00028 
00029 #include <QDBusConnection>
00030 #include <QDBusInterface>
00031 #include <QTimer>
00032 
00033 namespace Akonadi
00034 {
00035 
00036 class CollectionAttributesSynchronizationJobPrivate : public KJobPrivateBase
00037 {
00038   public:
00039     CollectionAttributesSynchronizationJobPrivate( CollectionAttributesSynchronizationJob* parent )
00040       : q( parent ),
00041         interface( 0 ),
00042         safetyTimer( 0 ),
00043         timeoutCount( 0 )
00044     {
00045     }
00046 
00047     void doStart();
00048 
00049     CollectionAttributesSynchronizationJob *q;
00050     AgentInstance instance;
00051     Collection collection;
00052     QDBusInterface* interface;
00053     QTimer* safetyTimer;
00054     int timeoutCount;
00055     static int timeoutCountLimit;
00056 
00057     void slotSynchronized( qlonglong );
00058     void slotTimeout();
00059 };
00060 
00061 int CollectionAttributesSynchronizationJobPrivate::timeoutCountLimit = 60;
00062 
00063 CollectionAttributesSynchronizationJob::CollectionAttributesSynchronizationJob( const Collection &collection, QObject *parent )
00064   : KJob( parent ),
00065     d( new CollectionAttributesSynchronizationJobPrivate( this ) )
00066 {
00067   d->instance = AgentManager::self()->instance( collection.resource() );
00068   d->collection = collection;
00069   d->safetyTimer = new QTimer( this );
00070   connect( d->safetyTimer, SIGNAL(timeout()), SLOT(slotTimeout()) );
00071   d->safetyTimer->setInterval( 10 * 1000 );
00072   d->safetyTimer->setSingleShot( false );
00073 }
00074 
00075 CollectionAttributesSynchronizationJob::~CollectionAttributesSynchronizationJob()
00076 {
00077   delete d;
00078 }
00079 
00080 void CollectionAttributesSynchronizationJob::start()
00081 {
00082   d->start();
00083 }
00084 
00085 void CollectionAttributesSynchronizationJobPrivate::doStart()
00086 {
00087   if ( !collection.isValid() ) {
00088     q->setError( KJob::UserDefinedError );
00089     q->setErrorText( i18n( "Invalid collection instance." ) );
00090     q->emitResult();
00091     return;
00092   }
00093 
00094   if ( !instance.isValid() ) {
00095     q->setError( KJob::UserDefinedError );
00096     q->setErrorText( i18n( "Invalid resource instance." ) );
00097     q->emitResult();
00098     return;
00099   }
00100 
00101   interface = new QDBusInterface( QString::fromLatin1( "org.freedesktop.Akonadi.Resource.%1" ).arg( instance.identifier() ),
00102                                   QString::fromLatin1( "/" ),
00103                                   QString::fromLatin1( "org.freedesktop.Akonadi.Resource" ),
00104                                   DBusConnectionPool::threadConnection(), this );
00105   connect( interface, SIGNAL(attributesSynchronized(qlonglong)),
00106            q, SLOT(slotSynchronized(qlonglong)) );
00107 
00108   if ( interface->isValid() ) {
00109     const QDBusMessage reply = interface->call( QString::fromUtf8( "synchronizeCollectionAttributes" ), collection.id() );
00110     if ( reply.type() == QDBusMessage::ErrorMessage ) {
00111       // This means that the resource doesn't provide a synchronizeCollectionAttributes method, so we just finish the job
00112       q->emitResult();
00113       return;
00114     }
00115     safetyTimer->start();
00116   } else {
00117     q->setError( KJob::UserDefinedError );
00118     q->setErrorText( i18n( "Unable to obtain D-Bus interface for resource '%1'", instance.identifier() ) );
00119     q->emitResult();
00120     return;
00121   }
00122 }
00123 
00124 void CollectionAttributesSynchronizationJobPrivate::slotSynchronized( qlonglong id )
00125 {
00126   if ( id == collection.id() ) {
00127     q->disconnect( interface, SIGNAL(attributesSynchronized(qlonglong)),
00128                    q, SLOT(slotSynchronized(qlonglong)) );
00129     safetyTimer->stop();
00130     q->emitResult();
00131   }
00132 }
00133 
00134 void CollectionAttributesSynchronizationJobPrivate::slotTimeout()
00135 {
00136   instance = AgentManager::self()->instance( instance.identifier() );
00137   timeoutCount++;
00138 
00139   if ( timeoutCount > timeoutCountLimit ) {
00140     safetyTimer->stop();
00141     q->setError( KJob::UserDefinedError );
00142     q->setErrorText( i18n( "Collection attributes synchronization timed out." ) );
00143     q->emitResult();
00144     return;
00145   }
00146 
00147   if ( instance.status() == AgentInstance::Idle ) {
00148     // try again, we might have lost the synchronized() signal
00149     kDebug() << "trying again to sync collection attributes" << collection.id() << instance.identifier();
00150     interface->call( QString::fromUtf8( "synchronizeCollectionAttributes" ), collection.id() );
00151   }
00152 }
00153 
00154 }
00155 
00156 #include "collectionattributessynchronizationjob.moc"
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