kdeconnect-kde/plugins/sms/smsplugin.cpp
Simon Redman 74ba660cad Cache and delete old ConversationsDbusInterfaces to avoid memory leak
Summary:
After using the ConversationsDbusInterface for a little while, there can be significant (MBs) memory usage of cached messages. The QDBusAbstractAdaptor does not like to be manually deleted, but it looks like it is safe to do so after constructing a new one

This contradicts the comment in the BatteryPlugin and the BatteryDbusInterface, which says deletelater() is not safe. Has Qt been updated since then?

Test Plan:
- Run daemon
- Hopefully experience no crashes after many phone reconnects

Reviewers: #kde_connect, apol, albertvaka

Reviewed By: #kde_connect, apol, albertvaka

Subscribers: apol, kdeconnect

Tags: #kde_connect

Differential Revision: https://phabricator.kde.org/D16553
2019-01-21 12:01:26 -07:00

140 lines
4.8 KiB
C++

/**
* Copyright 2013 Albert Vaca <albertvaka@gmail.com>
* Copyright 2018 Simon Redman <simon@ergotech.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "smsplugin.h"
#include <KLocalizedString>
#include <KPluginFactory>
#include <QDebug>
#include <QDBusConnection>
#include <QLoggingCategory>
#include <core/device.h>
#include <core/daemon.h>
#include "sendreplydialog.h"
K_PLUGIN_FACTORY_WITH_JSON( KdeConnectPluginFactory, "kdeconnect_sms.json", registerPlugin< SmsPlugin >(); )
Q_LOGGING_CATEGORY(KDECONNECT_PLUGIN_SMS, "kdeconnect.plugin.sms")
QMap<QString, ConversationsDbusInterface*> SmsPlugin::conversationInterfaces;
SmsPlugin::SmsPlugin(QObject* parent, const QVariantList& args)
: KdeConnectPlugin(parent, args)
, m_telepathyInterface(QStringLiteral("org.freedesktop.Telepathy.ConnectionManager.kdeconnect"), QStringLiteral("/kdeconnect"))
, m_conversationInterface(new ConversationsDbusInterface(this))
{
// Once the new ConversationsDbusInterface has been fully set up, the old one can safely be
// deleted
const auto& oldInterfaceItr = SmsPlugin::conversationInterfaces.find(device()->id());
if (oldInterfaceItr != SmsPlugin::conversationInterfaces.end()) {
ConversationsDbusInterface* oldInterface = oldInterfaceItr.value();
oldInterface->deleteLater();
SmsPlugin::conversationInterfaces.erase(oldInterfaceItr);
}
}
SmsPlugin::~SmsPlugin()
{
// Because of how Qt's Dbus is designed, we are unable to immediately delete m_conversationInterface,
// See the comment in ~NotificationsPlugin() for more information
// We save the old pointer for now; the internal data can be used as a cache.
// The next time we construct an SmsPlugin, we access the old pointer and delete it
SmsPlugin::conversationInterfaces[device()->id()] = m_conversationInterface;
}
bool SmsPlugin::receivePacket(const NetworkPacket& np)
{
if (np.type() == PACKET_TYPE_SMS_MESSAGES) {
return handleBatchMessages(np);
}
return true;
}
void SmsPlugin::sendSms(const QString& phoneNumber, const QString& messageBody)
{
NetworkPacket np(PACKET_TYPE_SMS_REQUEST, {
{"sendSms", true},
{"phoneNumber", phoneNumber},
{"messageBody", messageBody}
});
qCDebug(KDECONNECT_PLUGIN_SMS) << "Dispatching SMS send request to remote";
sendPacket(np);
}
void SmsPlugin::requestAllConversations()
{
NetworkPacket np(PACKET_TYPE_SMS_REQUEST_CONVERSATIONS);
sendPacket(np);
}
void SmsPlugin::requestConversation (const qint64& conversationID) const
{
NetworkPacket np(PACKET_TYPE_SMS_REQUEST_CONVERSATION);
np.set("threadID", conversationID);
sendPacket(np);
}
void SmsPlugin::forwardToTelepathy(const ConversationMessage& message)
{
// If we don't have a valid Telepathy interface, bail out
if (!(m_telepathyInterface.isValid())) return;
qCDebug(KDECONNECT_PLUGIN_SMS) << "Passing a text message to the telepathy interface";
connect(&m_telepathyInterface, SIGNAL(messageReceived(QString,QString)), SLOT(sendSms(QString,QString)), Qt::UniqueConnection);
const QString messageBody = message.body();
const QString contactName; // TODO: When telepathy support is improved, look up the contact with KPeople
const QString phoneNumber = message.address();
m_telepathyInterface.call(QDBus::NoBlock, QStringLiteral("sendMessage"), phoneNumber, contactName, messageBody);
}
bool SmsPlugin::handleBatchMessages(const NetworkPacket& np)
{
const auto messages = np.get<QVariantList>("messages");
QList<ConversationMessage> messagesList;
messagesList.reserve(messages.count());
for (const QVariant& body : messages) {
ConversationMessage message(body.toMap());
if (message.containsTextBody()) {
forwardToTelepathy(message);
messagesList.append(message);
}
}
m_conversationInterface->addMessages(messagesList);
return true;
}
QString SmsPlugin::dbusPath() const
{
return "/modules/kdeconnect/devices/" + device()->id() + "/sms";
}
#include "smsplugin.moc"