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akonadi

session.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 "session.h"
00021 #include "session_p.h"
00022 
00023 #include "imapparser_p.h"
00024 #include "job.h"
00025 #include "job_p.h"
00026 #include "servermanager_p.h"
00027 #include "xdgbasedirs_p.h"
00028 
00029 #include <kdebug.h>
00030 #include <klocale.h>
00031 
00032 #include <QCoreApplication>
00033 #include <QtCore/QDir>
00034 #include <QtCore/QQueue>
00035 #include <QtCore/QThreadStorage>
00036 #include <QtCore/QTimer>
00037 
00038 #include <QtNetwork/QLocalSocket>
00039 
00040 #define PIPELINE_LENGTH 2
00041 
00042 using namespace Akonadi;
00043 
00044 
00045 //@cond PRIVATE
00046 
00047 void SessionPrivate::startNext()
00048 {
00049   QTimer::singleShot( 0, mParent, SLOT(doStartNext()) );
00050 }
00051 
00052 void SessionPrivate::reconnect()
00053 {
00054   // should be checking connection method and value validity
00055   if ( socket->state() != QLocalSocket::ConnectedState &&
00056        socket->state() != QLocalSocket::ConnectingState ) {
00057 #ifdef Q_OS_WIN  //krazy:exclude=cpp
00058     const QString namedPipe = mConnectionSettings->value( QLatin1String( "Data/NamedPipe" ), QLatin1String( "Akonadi" ) ).toString();
00059     socket->connectToServer( namedPipe );
00060 #else
00061     const QString defaultSocketDir = XdgBaseDirs::saveDir( "data", QLatin1String( "akonadi" ) );
00062     const QString path = mConnectionSettings->value( QLatin1String( "Data/UnixPath" ), defaultSocketDir + QLatin1String( "/akonadiserver.socket" ) ).toString();
00063     socket->connectToServer( path );
00064 #endif
00065   }
00066 }
00067 
00068 void SessionPrivate::socketError()
00069 {
00070   if ( currentJob )
00071     currentJob->d_ptr->lostConnection();
00072   connected = false;
00073   QTimer::singleShot( 1000, mParent, SLOT(reconnect()) );
00074 }
00075 
00076 void SessionPrivate::dataReceived()
00077 {
00078   while ( socket->bytesAvailable() > 0 ) {
00079     if ( parser->continuationSize() > 1 ) {
00080       const QByteArray data = socket->read( qMin( socket->bytesAvailable(), parser->continuationSize() - 1 ) );
00081       parser->parseBlock( data );
00082     } else if ( socket->canReadLine() ) {
00083       if ( !parser->parseNextLine( socket->readLine() ) )
00084         continue; // response not yet completed
00085 
00086       // handle login response
00087       if ( parser->tag() == QByteArray("0") ) {
00088         if ( parser->data().startsWith( "OK" ) ) {
00089           connected = true;
00090           startNext();
00091         } else {
00092           kWarning( 5250 ) << "Unable to login to Akonadi server:" << parser->data();
00093           socket->close();
00094           QTimer::singleShot( 1000, mParent, SLOT(reconnect()) );
00095         }
00096       }
00097 
00098       // send login command
00099       if ( parser->tag() == "*" && parser->data().startsWith( "OK Akonadi" ) ) {
00100         const int pos = parser->data().indexOf( "[PROTOCOL" );
00101         if ( pos > 0 ) {
00102           qint64 tmp = 0;
00103           ImapParser::parseNumber( parser->data(), tmp, 0, pos + 9 );
00104           protocolVersion = tmp;
00105           Internal::setServerProtocolVersion( tmp );
00106         }
00107         kDebug( 5250 ) << "Server protocol version is:" << protocolVersion;
00108 
00109         writeData( "0 LOGIN " + sessionId + '\n' );
00110 
00111       // work for the current job
00112       } else {
00113         if ( currentJob )
00114           currentJob->d_ptr->handleResponse( parser->tag(), parser->data() );
00115       }
00116 
00117       // reset parser stuff
00118       parser->reset();
00119     } else {
00120       break; // nothing we can do for now
00121     }
00122   }
00123 }
00124 
00125 bool SessionPrivate::canPipelineNext()
00126 {
00127   if ( queue.isEmpty() || pipeline.count() >= PIPELINE_LENGTH )
00128     return false;
00129   if ( pipeline.isEmpty() && currentJob )
00130     return currentJob->d_ptr->mWriteFinished;
00131   if ( !pipeline.isEmpty() )
00132     return pipeline.last()->d_ptr->mWriteFinished;
00133   return false;
00134 }
00135 
00136 void SessionPrivate::doStartNext()
00137 {
00138   if ( !connected || (queue.isEmpty() && pipeline.isEmpty()) )
00139     return;
00140   if ( canPipelineNext() ) {
00141     Akonadi::Job *nextJob = queue.dequeue();
00142     pipeline.enqueue( nextJob );
00143     startJob( nextJob );
00144   }
00145   if ( jobRunning )
00146     return;
00147   jobRunning = true;
00148   if ( !pipeline.isEmpty() ) {
00149     currentJob = pipeline.dequeue();
00150   } else {
00151     currentJob = queue.dequeue();
00152     startJob( currentJob );
00153   }
00154 }
00155 
00156 void SessionPrivate::startJob( Job *job )
00157 {
00158   if ( protocolVersion < minimumProtocolVersion() ) {
00159     job->setError( Job::ProtocolVersionMismatch );
00160     job->setErrorText( i18n( "Protocol version %1 found, expected at least %2", protocolVersion, minimumProtocolVersion() ) );
00161     job->emitResult();
00162   } else {
00163     job->d_ptr->startQueued();
00164   }
00165 }
00166 
00167 void SessionPrivate::jobDone(KJob * job)
00168 {
00169   if( job == currentJob ) {
00170     if ( pipeline.isEmpty() ) {
00171       jobRunning = false;
00172       currentJob = 0;
00173     } else {
00174       currentJob = pipeline.dequeue();
00175     }
00176     startNext();
00177   }
00178   // ### better handle the other cases too, user might have canceled jobs
00179   else {
00180     kDebug( 5250 ) << job << "Non-current job finished.";
00181   }
00182 }
00183 
00184 void SessionPrivate::jobWriteFinished( Akonadi::Job* job )
00185 {
00186   Q_ASSERT( (job == currentJob && pipeline.isEmpty()) || (job = pipeline.last()) );
00187   startNext();
00188 }
00189 
00190 void SessionPrivate::jobDestroyed(QObject * job)
00191 {
00192   queue.removeAll( static_cast<Akonadi::Job*>( job ) );
00193   // ### likely not enough to really cancel already running jobs
00194   pipeline.removeAll( static_cast<Akonadi::Job*>( job ) );
00195   if ( currentJob == job )
00196     currentJob = 0;
00197 }
00198 
00199 void SessionPrivate::addJob(Job * job)
00200 {
00201   queue.append( job );
00202   QObject::connect( job, SIGNAL(result(KJob*)), mParent, SLOT(jobDone(KJob*)) );
00203   QObject::connect( job, SIGNAL(writeFinished(Akonadi::Job*)), mParent, SLOT(jobWriteFinished(Akonadi::Job*)) );
00204   QObject::connect( job, SIGNAL(destroyed(QObject*)), mParent, SLOT(jobDestroyed(QObject*)) );
00205   startNext();
00206 }
00207 
00208 int SessionPrivate::nextTag()
00209 {
00210   return theNextTag++;
00211 }
00212 
00213 void SessionPrivate::writeData(const QByteArray & data)
00214 {
00215   socket->write( data );
00216 }
00217 
00218 //@endcond
00219 
00220 
00221 Session::Session(const QByteArray & sessionId, QObject * parent) :
00222     QObject( parent ),
00223     d( new SessionPrivate( this ) )
00224 {
00225   if ( !sessionId.isEmpty() ) {
00226     d->sessionId = sessionId;
00227   } else {
00228     d->sessionId = QCoreApplication::instance()->applicationName().toUtf8()
00229         + "-" + QByteArray::number( qrand() );
00230   }
00231 
00232   d->connected = false;
00233   d->theNextTag = 1;
00234   d->currentJob = 0;
00235   d->jobRunning = false;
00236 
00237   const QString connectionConfigFile = XdgBaseDirs::akonadiConnectionConfigFile();
00238 
00239   QFileInfo fileInfo( connectionConfigFile );
00240   if ( !fileInfo.exists() ) {
00241     kWarning( 5250 ) << "Akonadi Client Session: connection config file '"
00242                      << "akonadi/akonadiconnectionrc can not be found in '"
00243                      << XdgBaseDirs::homePath( "config" ) << "' nor in any of "
00244                      << XdgBaseDirs::systemPathList( "config" );
00245   }
00246 
00247   d->mConnectionSettings = new QSettings( connectionConfigFile, QSettings::IniFormat );
00248 
00249   // should check connection method
00250   d->socket = new QLocalSocket( this );
00251 
00252   connect( d->socket, SIGNAL(disconnected()), SLOT(socketError()) );
00253   connect( d->socket, SIGNAL(error(QLocalSocket::LocalSocketError)), SLOT(socketError()) );
00254   connect( d->socket, SIGNAL(readyRead()), SLOT(dataReceived()) );
00255   d->reconnect();
00256 }
00257 
00258 Session::~Session()
00259 {
00260   clear();
00261   delete d;
00262 }
00263 
00264 QByteArray Session::sessionId() const
00265 {
00266   return d->sessionId;
00267 }
00268 
00269 QThreadStorage<Session*> instances;
00270 
00271 void SessionPrivate::createDefaultSession( const QByteArray &sessionId )
00272 {
00273   Q_ASSERT_X( !sessionId.isEmpty(), "SessionPrivate::createDefaultSession",
00274               "You tried to create a default session with empty session id!" );
00275   Q_ASSERT_X( !instances.hasLocalData(), "SessionPrivate::createDefaultSession",
00276               "You tried to create a default session twice!" );
00277 
00278   instances.setLocalData( new Session( sessionId ) );
00279 }
00280 
00281 Session* Session::defaultSession()
00282 {
00283   if ( !instances.hasLocalData() )
00284     instances.setLocalData( new Session() );
00285   return instances.localData();
00286 }
00287 
00288 void Session::clear()
00289 {
00290   foreach ( Job* job, d->queue )
00291     job->kill( KJob::EmitResult );
00292   d->queue.clear();
00293   if ( d->currentJob )
00294     d->currentJob->kill( KJob::EmitResult );
00295 }
00296 
00297 #include "session.moc"

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