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/*
* Copyright (C) 2014 Aaron Seigo <aseigo@kde.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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 6 of version 3 of the license.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "resourceaccess.h"
#include "common/console.h"
#include "common/commands.h"
#include "common/handshake_generated.h"
#include "common/revisionupdate_generated.h"
#include <QDebug>
#include <QProcess>
namespace Akonadi2
{
ResourceAccess::ResourceAccess(const QString &resourceName, QObject *parent)
: QObject(parent),
m_resourceName(resourceName),
m_socket(new QLocalSocket(this)),
m_tryOpenTimer(new QTimer(this)),
m_startingProcess(false)
{
m_tryOpenTimer->setInterval(50);
m_tryOpenTimer->setSingleShot(true);
connect(m_tryOpenTimer, &QTimer::timeout,
this, &ResourceAccess::open);
log("Starting access");
connect(m_socket, &QLocalSocket::connected,
this, &ResourceAccess::connected);
connect(m_socket, &QLocalSocket::disconnected,
this, &ResourceAccess::disconnected);
connect(m_socket, SIGNAL(error(QLocalSocket::LocalSocketError)),
this, SLOT(connectionError(QLocalSocket::LocalSocketError)));
connect(m_socket, &QIODevice::readyRead,
this, &ResourceAccess::readResourceMessage);
}
ResourceAccess::~ResourceAccess()
{
}
QString ResourceAccess::resourceName() const
{
return m_resourceName;
}
bool ResourceAccess::isReady() const
{
return m_socket->isValid();
}
void ResourceAccess::open()
{
if (m_socket->isValid()) {
log("Socket valid, so aborting the open");
return;
}
m_socket->setServerName(m_resourceName);
log(QString("Opening %1").arg(m_socket->serverName()));
//FIXME: race between starting the exec and opening the socket?
m_socket->open();
}
void ResourceAccess::close()
{
log(QString("Closing %1").arg(m_socket->fullServerName()));
m_socket->close();
}
void ResourceAccess::connected()
{
m_startingProcess = false;
log(QString("Connected: ").arg(m_socket->fullServerName()));
{
auto name = m_fbb.CreateString(QString::number((long long)this).toLatin1());
auto command = Akonadi2::CreateHandshake(m_fbb, name);
Akonadi2::FinishHandshakeBuffer(m_fbb, command);
Commands::write(m_socket, Commands::HandshakeCommand, m_fbb);
m_fbb.Clear();
}
emit ready(true);
}
void ResourceAccess::disconnected()
{
m_socket->close();
log(QString("Disconnected from %1").arg(m_socket->fullServerName()));
emit ready(false);
open();
}
void ResourceAccess::connectionError(QLocalSocket::LocalSocketError error)
{
log(QString("Connection error: %2").arg(error));
if (m_startingProcess) {
if (!m_tryOpenTimer->isActive()) {
m_tryOpenTimer->start();
}
return;
}
m_startingProcess = true;
log(QString("Attempting to start resource ") + m_resourceName);
QStringList args;
args << m_resourceName;
if (QProcess::startDetached("akonadi2_synchronizer", args)) {
m_socket->open();
}
}
void ResourceAccess::readResourceMessage()
{
if (!m_socket->isValid()) {
return;
}
m_partialMessageBuffer += m_socket->readAll();
// should be scheduled rather than processed all at once
while (processMessageBuffer()) {}
}
bool ResourceAccess::processMessageBuffer()
{
static const int headerSize = (sizeof(int) * 2);
if (m_partialMessageBuffer.size() < headerSize) {
return false;
}
const int commandId = *(int*)m_partialMessageBuffer.constData();
const int size = *(int*)(m_partialMessageBuffer.constData() + sizeof(int));
if (size > m_partialMessageBuffer.size() - headerSize) {
return false;
}
switch (commandId) {
case Commands::RevisionUpdateCommand: {
auto buffer = Akonadi2::GetRevisionUpdate(m_partialMessageBuffer.constData() + headerSize);
log(QString("Revision updated to: %1").arg(buffer->revision()));
emit revisionChanged(buffer->revision());
break;
}
default:
break;
}
m_partialMessageBuffer.remove(0, headerSize + size);
return m_partialMessageBuffer.size() >= headerSize;
}
void ResourceAccess::log(const QString &message)
{
Console::main()->log(m_resourceName + ": " + message);
}
}
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