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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"
#include "selftestdialog_p.h"
#include "session_p.h"
#include "firstrun_p.h"
#include <KDebug>
#include <KGlobal>
#include <akonadi/private/protocol_p.h>
#include <akonadi/private/xdgbasedirs_p.h>
#include <QtDBus>
#include <QPointer>
#include <QTimer>
#include <boost/scoped_ptr.hpp>
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 && !ServerManager::hasInstanceIdentifier()) {
mFirstRunner = new Firstrun(instance);
}
}
~ServerManagerPrivate()
{
delete instance;
}
void serviceOwnerChanged( const QString &name, const QString &oldOwner, const QString &newOwner )
{
if (name == ServerManager::serviceName(ServerManager::ControlLock ) && !oldOwner.isEmpty() && newOwner.isEmpty()) {
// Control.Lock has disappeared during startup, which means that akonadi_control
// has terminated, most probably because it was not able to start akonadiserver
// process. Don't wait 30 seconds for sefetyTimeout, but go into Broken state
// immediately.
if (mState == ServerManager::Starting) {
setState(ServerManager::Broken);
return;
}
}
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 && !ServerManager::hasInstanceIdentifier()) {
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(ServerManager::serviceName(ServerManager::Server),
DBusConnectionPool::threadConnection(),
QDBusServiceWatcher::WatchForOwnerChange, this);
watcher->addWatchedService(ServerManager::serviceName(ServerManager::Control));
watcher->addWatchedService(ServerManager::serviceName(ServerManager::ControlLock));
watcher->addWatchedService(ServerManager::serviceName(ServerManager::UpgradeIndicator));
// 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(ServerManager::serviceName(ServerManager::Control));
const bool serverRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::Server));
if (controlRegistered && serverRegistered) {
return true;
}
const bool controlLockRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::ControlLock));
if (controlLockRegistered || controlRegistered) {
kDebug() << "Akonadi server is already starting up";
sInstance->setState(Starting);
return true;
}
kDebug() << "executing akonadi_control";
QStringList args;
if (hasInstanceIdentifier()) {
args << QLatin1String("--instance") << instanceIdentifier();
}
const bool ok = QProcess::startDetached(QLatin1String("akonadi_control"), args);
if (!ok) {
kWarning() << "Unable to execute akonadi_control, falling back to D-Bus auto-launch";
QDBusReply<void> reply = DBusConnectionPool::threadConnection().interface()->startService(ServerManager::serviceName(ServerManager::Control));
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(ServerManager::serviceName(ServerManager::Control),
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)
{
QPointer<Akonadi::SelfTestDialog> dlg(new Akonadi::SelfTestDialog(parent));
dlg->hideIntroduction();
dlg->exec();
delete dlg;
}
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 serverUpgrading = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::UpgradeIndicator));
if (serverUpgrading) {
return Upgrading;
}
const bool controlRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::Control));
const bool serverRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::Server));
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;
}
}
const bool controlLockRegistered = DBusConnectionPool::threadConnection().interface()->isServiceRegistered(ServerManager::serviceName(ServerManager::ControlLock));
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) { // valid case where nothing is running (yet)
return previousState;
}
return NotRunning;
}
QString ServerManager::instanceIdentifier()
{
return QLatin1String(qgetenv("AKONADI_INSTANCE"));
}
bool ServerManager::hasInstanceIdentifier()
{
return !instanceIdentifier().isEmpty();
}
static QString makeServiceName(const char *base, const QString &name = QString())
{
if (ServerManager::instanceIdentifier().isEmpty()) {
return QLatin1String(base) % name;
}
return QLatin1String(base) % name % QLatin1Literal(".") % ServerManager::instanceIdentifier();
}
// remove once we require Akonadi 1.9
#ifndef AKONADI_DBUS_SERVER_SERVICE_UPGRADING
#define AKONADI_DBUS_SERVER_SERVICE_UPGRADING "org.freedesktop.Akonadi.upgrading"
#endif
QString ServerManager::serviceName(ServerManager::ServiceType serviceType)
{
switch (serviceType) {
case Server:
return makeServiceName(AKONADI_DBUS_SERVER_SERVICE);
case Control:
return makeServiceName(AKONADI_DBUS_CONTROL_SERVICE);
case ControlLock:
return makeServiceName(AKONADI_DBUS_CONTROL_SERVICE_LOCK);
case UpgradeIndicator:
return makeServiceName(AKONADI_DBUS_SERVER_SERVICE_UPGRADING);
}
Q_ASSERT(!"WTF?");
return QString();
}
QString ServerManager::agentServiceName(ServiceAgentType agentType, const QString &identifier)
{
switch (agentType) {
case Agent:
return makeServiceName(AKONADI_DBUS_SERVER_SERVICE, QString::fromLatin1(".Agent.%1").arg(identifier));
case Resource:
return makeServiceName(AKONADI_DBUS_SERVER_SERVICE, QString::fromLatin1(".Resource.%1").arg(identifier));
case Preprocessor:
return makeServiceName(AKONADI_DBUS_SERVER_SERVICE, QString::fromLatin1(".Preprocessor.%1").arg(identifier));
}
Q_ASSERT(!"WTF?");
return QString();
}
QString ServerManager::addNamespace(const QString &string)
{
if (ServerManager::hasInstanceIdentifier()) {
return string % QLatin1Char('_') % ServerManager::instanceIdentifier();
}
return string;
}
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;
}
QString Internal::xdgSaveDir(const char *resource, const QString &relPath)
{
QString fullRelPath = QLatin1String("akonadi");
if (!ServerManager::instanceIdentifier().isEmpty()) {
fullRelPath += QLatin1String("/instance/") + ServerManager::instanceIdentifier();
}
if (!relPath.isEmpty()) {
fullRelPath += QLatin1Char('/') + relPath;
}
return XdgBaseDirs::saveDir(resource, fullRelPath);
}
#include "moc_servermanager.cpp"
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