notificationmanager.cpp

/*
    SPDX-FileCopyrightText: 2006-2007 Volker Krause <vkrause@kde.org>
    SPDX-FileCopyrightText: 2010 Michael Jansen <kde@michael-jansen>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
*/
 
#include "notificationmanager.h"
#include "aggregatedfetchscope.h"
#include "akonadiserver_debug.h"
#include "handlerhelper.h"
#include "notificationsubscriber.h"
#include "storage/collectionstatistics.h"
#include "storage/notificationcollector.h"
#include "tracer.h"
 
#include "private/scope_p.h"
#include "private/standarddirs_p.h"
#include "shared/akranges.h"
 
#include <QDateTime>
#include <QSettings>
#include <QThreadPool>
#include <QTimer>
 
using namespace Akonadi;
using namespace Akonadi::Server;
using namespace AkRanges;
 
NotificationManager::NotificationManager(StartMode startMode)
    : AkThread(QStringLiteral("NotificationManager"), startMode)
    , mTimer(nullptr)
    , mNotifyThreadPool(nullptr)
    , mDebugNotifications(0)
{
}
 
NotificationManager::~NotificationManager()
{
    quitThread();
}
 
void NotificationManager::init()
{
    AkThread::init();
 
    const QString serverConfigFile = StandardDirs::serverConfigFile(StandardDirs::ReadWrite);
    QSettings settings(serverConfigFile, QSettings::IniFormat);
 
    mTimer = new QTimer(this);
    mTimer->setInterval(settings.value(QStringLiteral("NotificationManager/Interval"), 50).toInt());
    mTimer->setSingleShot(true);
    connect(mTimer, &QTimer::timeout, this, &NotificationManager::emitPendingNotifications);
 
    mNotifyThreadPool = new QThreadPool(this);
    mNotifyThreadPool->setMaxThreadCount(5);
 
    mCollectionFetchScope = new AggregatedCollectionFetchScope();
    mItemFetchScope = new AggregatedItemFetchScope();
    mTagFetchScope = new AggregatedTagFetchScope();
}
 
void NotificationManager::quit()
{
    mQuitting = true;
 
    mTimer->stop();
    delete mTimer;
 
    mNotifyThreadPool->clear();
    mNotifyThreadPool->waitForDone();
    delete mNotifyThreadPool;
 
    qDeleteAll(mSubscribers);
 
    delete mCollectionFetchScope;
    delete mItemFetchScope;
    delete mTagFetchScope;
 
    AkThread::quit();
}
 
void NotificationManager::registerConnection(quintptr socketDescriptor)
{
    Q_ASSERT(thread() == QThread::currentThread());
 
    auto subscriber = new NotificationSubscriber(this, socketDescriptor);
    qCInfo(AKONADISERVER_LOG) << "New notification connection (registered as" << subscriber << ")";
    connect(subscriber, &NotificationSubscriber::notificationDebuggingChanged, this, [this](bool enabled) {
        if (enabled) {
            ++mDebugNotifications;
        } else {
            --mDebugNotifications;
        }
        Q_ASSERT(mDebugNotifications >= 0);
        Q_ASSERT(mDebugNotifications <= mSubscribers.count());
    });
 
    mSubscribers.push_back(subscriber);
}
void NotificationManager::forgetSubscriber(NotificationSubscriber *subscriber)
{
    Q_ASSERT(QThread::currentThread() == thread());
    mSubscribers.removeAll(subscriber);
}
 
void NotificationManager::slotNotify(const Protocol::ChangeNotificationList &msgs)
{
    Q_ASSERT(QThread::currentThread() == thread());
    for (const auto &msg : msgs) {
        switch (msg->type()) {
        case Protocol::Command::CollectionChangeNotification:
            Protocol::CollectionChangeNotification::appendAndCompress(mNotifications, msg);
            continue;
        case Protocol::Command::ItemChangeNotification:
        case Protocol::Command::TagChangeNotification:
        case Protocol::Command::SubscriptionChangeNotification:
        case Protocol::Command::DebugChangeNotification:
            mNotifications.push_back(msg);
            continue;
 
        default:
            Q_ASSERT_X(false, "slotNotify", "Invalid notification type!");
            continue;
        }
    }
 
    if (!mTimer->isActive()) {
        mTimer->start();
    }
}
 
class NotifyRunnable : public QRunnable
{
public:
    explicit NotifyRunnable(NotificationSubscriber *subscriber, const Protocol::ChangeNotificationList &notifications)
        : mSubscriber(subscriber)
        , mNotifications(notifications)
    {
    }
 
    ~NotifyRunnable() override = default;
 
    void run() override
    {
        for (const auto &ntf : std::as_const(mNotifications)) {
            if (mSubscriber) {
                mSubscriber->notify(ntf);
            } else {
                break;
            }
        }
    }
 
private:
    Q_DISABLE_COPY_MOVE(NotifyRunnable)
 
    QPointer<NotificationSubscriber> mSubscriber;
    Protocol::ChangeNotificationList mNotifications;
};
 
void NotificationManager::emitPendingNotifications()
{
    Q_ASSERT(QThread::currentThread() == thread());
 
    if (mNotifications.isEmpty()) {
        return;
    }
 
    if (mDebugNotifications == 0) {
        mSubscribers | Views::filter(IsNotNull) | Actions::forEach([this](const auto &subscriber) {
            mNotifyThreadPool->start(new NotifyRunnable(subscriber, mNotifications));
        });
    } else {
        // When debugging notification we have to use a non-threaded approach
        // so that we can work with return value of notify()
        for (const auto &notification : std::as_const(mNotifications)) {
            QList<QByteArray> listeners;
            for (NotificationSubscriber *subscriber : std::as_const(mSubscribers)) {
                if (subscriber && subscriber->notify(notification)) {
                    listeners.push_back(subscriber->subscriber());
                }
            }
 
            emitDebugNotification(notification, listeners);
        }
    }
 
    mNotifications.clear();
}
 
void NotificationManager::emitDebugNotification(const Protocol::ChangeNotificationPtr &ntf, const QList<QByteArray> &listeners)
{
    auto debugNtf = Protocol::DebugChangeNotificationPtr::create();
    debugNtf->setNotification(ntf);
    debugNtf->setListeners(listeners);
    debugNtf->setTimestamp(QDateTime::currentMSecsSinceEpoch());
    mSubscribers | Views::filter(IsNotNull) | Actions::forEach([this, &debugNtf](const auto &subscriber) {
        mNotifyThreadPool->start(new NotifyRunnable(subscriber, {debugNtf}));
    });
}
 
#include "moc_notificationmanager.cpp"