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akonadi

resourcescheduler.cpp

00001 /*
00002     Copyright (c) 2007 Volker Krause <vkrause@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or modify it
00005     under the terms of the GNU Library General Public License as published by
00006     the Free Software Foundation; either version 2 of the License, or (at your
00007     option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful, but WITHOUT
00010     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
00011     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
00012     License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to the
00016     Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
00017     02110-1301, USA.
00018 */
00019 
00020 #include "resourcescheduler_p.h"
00021 
00022 #include <kdebug.h>
00023 
00024 #include <QtCore/QTimer>
00025 #include <QtDBus/QDBusInterface>
00026 #include <QtDBus/QDBusConnectionInterface>
00027 
00028 using namespace Akonadi;
00029 
00030 qint64 ResourceScheduler::Task::latestSerial = 0;
00031 static QDBusAbstractInterface *s_resourcetracker = 0;
00032 
00033 //@cond PRIVATE
00034 
00035 ResourceScheduler::ResourceScheduler( QObject *parent ) :
00036     QObject( parent ),
00037     mOnline( false )
00038 {
00039 }
00040 
00041 void ResourceScheduler::scheduleFullSync()
00042 {
00043   Task t;
00044   t.type = SyncAll;
00045   if ( !mTaskList.isEmpty() && ( mTaskList.last() == t || mCurrentTask == t ) )
00046     return;
00047   mTaskList << t;
00048   signalTaskToTracker( t, "SyncAll" );
00049   scheduleNext();
00050 }
00051 
00052 void ResourceScheduler::scheduleCollectionTreeSync()
00053 {
00054   Task t;
00055   t.type = SyncCollectionTree;
00056   if ( !mTaskList.isEmpty() && ( mTaskList.last() == t || mCurrentTask == t ) )
00057     return;
00058   mTaskList << t;
00059   signalTaskToTracker( t, "SyncCollectionTree" );
00060   scheduleNext();
00061 }
00062 
00063 void ResourceScheduler::scheduleSync(const Collection & col)
00064 {
00065   Task t;
00066   t.type = SyncCollection;
00067   t.collection = col;
00068   if ( !mTaskList.isEmpty() && ( mTaskList.last() == t || mCurrentTask == t ) )
00069     return;
00070   mTaskList << t;
00071   signalTaskToTracker( t, "SyncCollection" );
00072   scheduleNext();
00073 }
00074 
00075 void ResourceScheduler::scheduleItemFetch(const Item & item, const QSet<QByteArray> &parts, const QDBusMessage & msg)
00076 {
00077   Task t;
00078   t.type = FetchItem;
00079   t.item = item;
00080   t.itemParts = parts;
00081   t.dbusMsg = msg;
00082   if ( !mTaskList.isEmpty() && ( mTaskList.last() == t || mCurrentTask == t ) )
00083     return;
00084   mTaskList << t;
00085   signalTaskToTracker( t, "FetchItem" );
00086   scheduleNext();
00087 }
00088 
00089 void ResourceScheduler::scheduleResourceCollectionDeletion()
00090 {
00091   Task t;
00092   t.type = DeleteResourceCollection;
00093   if ( !mTaskList.isEmpty() && ( mTaskList.last() == t || mCurrentTask == t ) )
00094     return;
00095   mTaskList << t;
00096   signalTaskToTracker( t, "DeleteResourceCollection" );
00097   scheduleNext();
00098 }
00099 
00100 void ResourceScheduler::scheduleChangeReplay()
00101 {
00102   Task t;
00103   t.type = ChangeReplay;
00104   if ( mTaskList.contains( t ) )
00105     return;
00106   mTaskList << t;
00107   signalTaskToTracker( t, "ChangeReplay" );
00108   scheduleNext();
00109 }
00110 
00111 void Akonadi::ResourceScheduler::scheduleFullSyncCompletion()
00112 {
00113   Task t;
00114   t.type = SyncAllDone;
00115   mTaskList << t;
00116   signalTaskToTracker( t, "SyncAllDone" );
00117   scheduleNext();
00118 }
00119 
00120 void ResourceScheduler::taskDone()
00121 {
00122   if ( isEmpty() )
00123     emit status( AgentBase::Idle );
00124 
00125   if ( s_resourcetracker ) {
00126     QList<QVariant> argumentList;
00127     argumentList << QString::number( mCurrentTask.serial )
00128                  << QString();
00129     s_resourcetracker->asyncCallWithArgumentList(QLatin1String("jobEnded"), argumentList);
00130   }
00131 
00132   mCurrentTask = Task();
00133   scheduleNext();
00134 }
00135 
00136 void ResourceScheduler::deferTask()
00137 {
00138   if ( s_resourcetracker ) {
00139     QList<QVariant> argumentList;
00140     argumentList << QString::number( mCurrentTask.serial )
00141                  << QString();
00142     s_resourcetracker->asyncCallWithArgumentList(QLatin1String("jobEnded"), argumentList);
00143   }
00144 
00145   Task t = mCurrentTask;
00146   mCurrentTask = Task();
00147   mTaskList << t;
00148   signalTaskToTracker( t, "DeferedTask" );
00149 
00150   scheduleNext();
00151 }
00152 
00153 bool ResourceScheduler::isEmpty()
00154 {
00155   return mTaskList.isEmpty();
00156 }
00157 
00158 void ResourceScheduler::scheduleNext()
00159 {
00160   if ( mCurrentTask.type != Invalid || mTaskList.isEmpty() || !mOnline )
00161     return;
00162   QTimer::singleShot( 0, this, SLOT(executeNext()) );
00163 }
00164 
00165 void ResourceScheduler::executeNext()
00166 {
00167   if( mCurrentTask.type != Invalid || mTaskList.isEmpty() )
00168     return;
00169 
00170   mCurrentTask = mTaskList.takeFirst();
00171 
00172   if ( s_resourcetracker ) {
00173     QList<QVariant> argumentList;
00174     argumentList << QString::number( mCurrentTask.serial );
00175     s_resourcetracker->asyncCallWithArgumentList(QLatin1String("jobStarted"), argumentList);
00176   }
00177 
00178   switch ( mCurrentTask.type ) {
00179     case SyncAll:
00180       emit executeFullSync();
00181       break;
00182     case SyncCollectionTree:
00183       emit executeCollectionTreeSync();
00184       break;
00185     case SyncCollection:
00186       emit executeCollectionSync( mCurrentTask.collection );
00187       break;
00188     case FetchItem:
00189       emit executeItemFetch( mCurrentTask.item, mCurrentTask.itemParts );
00190       break;
00191     case DeleteResourceCollection:
00192       emit executeResourceCollectionDeletion();
00193       break;
00194     case ChangeReplay:
00195       emit executeChangeReplay();
00196       break;
00197     case SyncAllDone:
00198       emit fullSyncComplete();
00199       break;
00200     default:
00201       Q_ASSERT( false );
00202   }
00203 }
00204 
00205 ResourceScheduler::Task ResourceScheduler::currentTask() const
00206 {
00207   return mCurrentTask;
00208 }
00209 
00210 void ResourceScheduler::setOnline(bool state)
00211 {
00212   if ( mOnline == state )
00213     return;
00214   mOnline = state;
00215   if ( mOnline ) {
00216     scheduleNext();
00217   } else if ( mCurrentTask.type != Invalid ) {
00218     // abort running task
00219     mTaskList.prepend( mCurrentTask );
00220     mCurrentTask = Task();
00221   }
00222 }
00223 
00224 void ResourceScheduler::signalTaskToTracker( const Task &task, const QByteArray &taskType )
00225 {
00226   // if there's a job tracer running, tell it about the new job
00227   if ( !s_resourcetracker && QDBusConnection::sessionBus().interface()->isServiceRegistered(QLatin1String("org.kde.akonadiconsole") ) ) {
00228     s_resourcetracker = new QDBusInterface( QLatin1String("org.kde.akonadiconsole"),
00229                                        QLatin1String("/resourcesJobtracker"),
00230                                        QLatin1String("org.freedesktop.Akonadi.JobTracker"),
00231                                        QDBusConnection::sessionBus(), 0 );
00232   }
00233 
00234   if ( s_resourcetracker ) {
00235     QList<QVariant> argumentList;
00236     argumentList << static_cast<AgentBase*>(  parent() )->identifier()
00237                  << QString::number( task.serial )
00238                  << QString()
00239                  << QString::fromLatin1( taskType );
00240     s_resourcetracker->asyncCallWithArgumentList(QLatin1String("jobCreated"), argumentList);
00241   }
00242 }
00243 
00244 //@endcond
00245 
00246 #include "resourcescheduler_p.moc"

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