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akonadi

resourcesynchronizationjob.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 "resourcesynchronizationjob.h"
00019 #include "dbusconnectionpool.h"
00020 #include "kjobprivatebase_p.h"
00021 
00022 #include <akonadi/agentinstance.h>
00023 #include <akonadi/agentmanager.h>
00024 
00025 #include <KDebug>
00026 #include <KLocale>
00027 
00028 #include <QDBusConnection>
00029 #include <QDBusInterface>
00030 #include <QTimer>
00031 
00032 namespace Akonadi
00033 {
00034 
00035 class ResourceSynchronizationJobPrivate : public KJobPrivateBase
00036 {
00037   public:
00038     ResourceSynchronizationJobPrivate( ResourceSynchronizationJob* parent ) :
00039       q( parent ),
00040       interface( 0 ),
00041       safetyTimer( 0 ),
00042       timeoutCount( 0 )
00043     {}
00044 
00045     void doStart();
00046 
00047     ResourceSynchronizationJob *q;
00048     AgentInstance instance;
00049     QDBusInterface* interface;
00050     QTimer* safetyTimer;
00051     int timeoutCount;
00052     static int timeoutCountLimit;
00053 
00054     void slotSynchronized();
00055     void slotTimeout();
00056 };
00057 
00058 int ResourceSynchronizationJobPrivate::timeoutCountLimit = 60;
00059 
00060 ResourceSynchronizationJob::ResourceSynchronizationJob(const AgentInstance& instance, QObject* parent) :
00061   KJob( parent ),
00062   d( new ResourceSynchronizationJobPrivate( this ) )
00063 {
00064   d->instance = instance;
00065   d->safetyTimer = new QTimer( this );
00066   connect( d->safetyTimer, SIGNAL( timeout() ), SLOT( slotTimeout() ) );
00067   d->safetyTimer->setInterval( 10 * 1000 );
00068   d->safetyTimer->setSingleShot( false );
00069 }
00070 
00071 ResourceSynchronizationJob::~ResourceSynchronizationJob()
00072 {
00073   delete d;
00074 }
00075 
00076 void ResourceSynchronizationJob::start()
00077 {
00078   d->start();
00079 }
00080 
00081 void ResourceSynchronizationJobPrivate::doStart()
00082 {
00083   if ( !instance.isValid() ) {
00084     q->setError( KJob::UserDefinedError );
00085     q->setErrorText( i18n( "Invalid resource instance." ) );
00086     q->emitResult();
00087     return;
00088   }
00089 
00090   interface = new QDBusInterface( QString::fromLatin1( "org.freedesktop.Akonadi.Resource.%1" ).arg( instance.identifier() ),
00091                                   QString::fromLatin1( "/" ),
00092                                   QString::fromLatin1( "org.freedesktop.Akonadi.Resource" ),
00093                                   DBusConnectionPool::threadConnection(), this );
00094   connect( interface, SIGNAL( synchronized() ), q, SLOT( slotSynchronized() ) );
00095 
00096   if ( interface->isValid() ) {
00097     instance.synchronize();
00098     safetyTimer->start();
00099   } else {
00100     q->setError( KJob::UserDefinedError );
00101     q->setErrorText( i18n( "Unable to obtain D-Bus interface for resource '%1'", instance.identifier() ) );
00102     q->emitResult();
00103     return;
00104   }
00105 }
00106 
00107 void ResourceSynchronizationJobPrivate::slotSynchronized()
00108 {
00109   q->disconnect( interface, SIGNAL( synchronized() ), q, SLOT( slotSynchronized() ) );
00110   safetyTimer->stop();
00111   q->emitResult();
00112 }
00113 
00114 void ResourceSynchronizationJobPrivate::slotTimeout()
00115 {
00116   instance = AgentManager::self()->instance( instance.identifier() );
00117   timeoutCount++;
00118 
00119   if ( timeoutCount > timeoutCountLimit ) {
00120     safetyTimer->stop();
00121     q->setError( KJob::UserDefinedError );
00122     q->setErrorText( i18n( "Resource synchronization timed out." ) );
00123     q->emitResult();
00124     return;
00125   }
00126 
00127   if ( instance.status() == AgentInstance::Idle ) {
00128     // try again, we might have lost the synchronized() signal
00129     kDebug() << "trying again to sync resource" << instance.identifier();
00130     instance.synchronize();
00131   }
00132 }
00133 
00134 AgentInstance ResourceSynchronizationJob::resource() const
00135 {
00136   return d->instance;
00137 }
00138 
00139 }
00140 
00141 #include "resourcesynchronizationjob.moc"

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