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/*
Copyright (c) 2008 Volker Krause <vkrause@kde.org>
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your
option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#include "servermanager.h"
#include "servermanager_p.h"
#include "agenttype.h"
#include "agentbase.h"
#include "agentmanager.h"
#include "dbusconnectionpool.h"
#ifndef Q_OS_WINCE
#include "selftestdialog_p.h"
#endif
#include "session_p.h"
#include "firstrun_p.h"
#include <KDebug>
#include <KGlobal>
#include <KLocale>
#include <QtDBus>
#include <QTimer>
#include <boost/scoped_ptr.hpp>
#define AKONADI_CONTROL_SERVICE QLatin1String( "org.freedesktop.Akonadi.Control" )
#define AKONADI_SERVER_SERVICE QLatin1String( "org.freedesktop.Akonadi" )
using namespace Akonadi;
class Akonadi::ServerManagerPrivate
{
public:
ServerManagerPrivate() :
instance( new ServerManager( this ) ),
mState( ServerManager::NotRunning ),
mSafetyTimer( new QTimer ),
mFirstRunner( 0 )
{
mState = instance->state();
mSafetyTimer->setSingleShot( true );
mSafetyTimer->setInterval( 30000 );
QObject::connect( mSafetyTimer.get(), SIGNAL(timeout()), instance, SLOT(timeout()) );
KGlobal::locale()->insertCatalog( QString::fromLatin1( "libakonadi" ) );
if ( mState == ServerManager::Running && Internal::clientType() == Internal::User )
mFirstRunner = new Firstrun( instance );
}
~ServerManagerPrivate()
{
delete instance;
}
void serviceOwnerChanged( const QString&, const QString&, const QString& )
{
serverProtocolVersion = -1,
checkStatusChanged();
}
void checkStatusChanged()
{
setState( instance->state() );
}
void setState( ServerManager::State state )
{
if ( mState != state ) {
mState = state;
emit instance->stateChanged( state );
if ( state == ServerManager::Running ) {
emit instance->started();
if ( !mFirstRunner && Internal::clientType() == Internal::User )
mFirstRunner = new Firstrun( instance );
} else if ( state == ServerManager::NotRunning || state == ServerManager::Broken ) {
emit instance->stopped();
}
if ( state == ServerManager::Starting || state == ServerManager::Stopping )
QMetaObject::invokeMethod( mSafetyTimer.get(), "start", Qt::QueuedConnection ); // in case we are in a different thread
else
QMetaObject::invokeMethod( mSafetyTimer.get(), "stop", Qt::QueuedConnection ); // in case we are in a different thread
}
}
void timeout()
{
if ( mState == ServerManager::Starting || mState == ServerManager::Stopping )
setState( ServerManager::Broken );
}
ServerManager *instance;
static int serverProtocolVersion;
ServerManager::State mState;
boost::scoped_ptr<QTimer> mSafetyTimer;
Firstrun *mFirstRunner;
static Internal::ClientType clientType;
};
int ServerManagerPrivate::serverProtocolVersion = -1;
Internal::ClientType ServerManagerPrivate::clientType = Internal::User;
K_GLOBAL_STATIC( ServerManagerPrivate, sInstance )
ServerManager::ServerManager(ServerManagerPrivate * dd ) :
d( dd )
{
qRegisterMetaType<Akonadi::ServerManager::State>();
QDBusServiceWatcher *watcher = new QDBusServiceWatcher( AKONADI_SERVER_SERVICE,
DBusConnectionPool::threadConnection(),
QDBusServiceWatcher::WatchForOwnerChange, this );
watcher->addWatchedService( AKONADI_CONTROL_SERVICE );
// this (and also the two connects below) are queued so that they trigger after AgentManager is done loading
// the current agent types and instances
// this ensures the invariant of AgentManager reporting a consistent state if ServerManager::state() == Running
// that's the case with direct connections as well, but only after you enter the event loop once
connect( watcher, SIGNAL(serviceOwnerChanged(QString,QString,QString)),
this, SLOT(serviceOwnerChanged(QString,QString,QString)), Qt::QueuedConnection );
// AgentManager is dangerous to use for agents themselves
if ( Internal::clientType() != Internal::User )
return;
connect( AgentManager::self(), SIGNAL(typeAdded(Akonadi::AgentType)), SLOT(checkStatusChanged()), Qt::QueuedConnection );
connect( AgentManager::self(), SIGNAL(typeRemoved(Akonadi::AgentType)), SLOT(checkStatusChanged()), Qt::QueuedConnection );
}
ServerManager * Akonadi::ServerManager::self()
{
return sInstance->instance;
}
bool ServerManager::start()
{
const bool controlRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_CONTROL_SERVICE );
const bool serverRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_SERVER_SERVICE );
if ( controlRegistered && serverRegistered )
return true;
// TODO: use AKONADI_CONTROL_SERVICE_LOCK instead once we depend on a recent enough Akonadi server
const bool controlLockRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_CONTROL_SERVICE + QLatin1String( ".lock" ) );
if ( controlLockRegistered || controlRegistered ) {
kDebug() << "Akonadi server is already starting up";
sInstance->setState( Starting );
return true;
}
kDebug() << "executing akonadi_control";
const bool ok = QProcess::startDetached( QLatin1String( "akonadi_control" ) );
if ( !ok ) {
kWarning() << "Unable to execute akonadi_control, falling back to D-Bus auto-launch";
QDBusReply<void> reply = DBusConnectionPool::threadConnection().interface()->startService( AKONADI_CONTROL_SERVICE );
if ( !reply.isValid() ) {
kDebug() << "Akonadi server could not be started via D-Bus either: "
<< reply.error().message();
return false;
}
}
sInstance->setState( Starting );
return true;
}
bool ServerManager::stop()
{
QDBusInterface iface( AKONADI_CONTROL_SERVICE,
QString::fromLatin1( "/ControlManager" ),
QString::fromLatin1( "org.freedesktop.Akonadi.ControlManager" ) );
if ( !iface.isValid() )
return false;
iface.call( QDBus::NoBlock, QString::fromLatin1( "shutdown" ) );
sInstance->setState( Stopping );
return true;
}
void ServerManager::showSelfTestDialog( QWidget *parent )
{
#ifndef Q_OS_WINCE
Akonadi::SelfTestDialog dlg( parent );
dlg.hideIntroduction();
dlg.exec();
#endif
}
bool ServerManager::isRunning()
{
return state() == Running;
}
ServerManager::State ServerManager::state()
{
ServerManager::State previousState = NotRunning;
if ( sInstance.exists() ) // be careful, this is called from the ServerManager::Private ctor, so using sInstance unprotected can cause infinite recursion
previousState = sInstance->mState;
const bool controlRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_CONTROL_SERVICE );
const bool serverRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_SERVER_SERVICE );
if ( controlRegistered && serverRegistered ) {
// check if the server protocol is recent enough
if ( sInstance.exists() ) {
if ( Internal::serverProtocolVersion() >= 0 &&
Internal::serverProtocolVersion() < SessionPrivate::minimumProtocolVersion() )
return Broken;
}
// AgentManager is dangerous to use for agents themselves
if ( Internal::clientType() == Internal::User ) {
// besides the running server processes we also need at least one resource to be operational
AgentType::List agentTypes = AgentManager::self()->types();
foreach ( const AgentType &type, agentTypes ) {
if ( type.capabilities().contains( QLatin1String( "Resource" ) ) )
return Running;
}
return Broken;
} else {
return Running;
}
}
// TODO: use AKONADI_CONTROL_SERVICE_LOCK instead once we depend on a recent enough Akonadi server
const bool controlLockRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered( AKONADI_CONTROL_SERVICE + QLatin1String( ".lock" ) );
if ( controlLockRegistered || controlRegistered ) {
kDebug() << "Akonadi server is already starting up";
if ( previousState == Running )
return NotRunning; // we don't know if it's starting or stopping, probably triggered by someone else
return previousState;
}
if ( serverRegistered ) {
kWarning() << "Akonadi server running without control process!";
return Broken;
}
if ( previousState == Starting || previousState == Broken ) // valid cases where nothing might be running (yet)
return previousState;
return NotRunning;
}
int Internal::serverProtocolVersion()
{
return ServerManagerPrivate::serverProtocolVersion;
}
void Internal::setServerProtocolVersion( int version )
{
ServerManagerPrivate::serverProtocolVersion = version;
if ( sInstance.exists() )
sInstance->checkStatusChanged();
}
Internal::ClientType Internal::clientType()
{
return ServerManagerPrivate::clientType;
}
void Internal::setClientType( ClientType type )
{
ServerManagerPrivate::clientType = type;
}
#include "servermanager.moc"
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