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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**************************************************************************/
#include "sshconnectionmanager.h"
#include "sshconnection.h"
#include <QCoreApplication>
#include <QList>
#include <QMutex>
#include <QMutexLocker>
#include <QObject>
#include <QThread>
namespace QSsh {
namespace Internal {
class SshConnectionManagerPrivate : public QObject
{
Q_OBJECT
public:
static QMutex instanceMutex;
static SshConnectionManager &instance()
{
static SshConnectionManager manager;
return manager;
}
SshConnectionManagerPrivate()
{
moveToThread(QCoreApplication::instance()->thread());
}
QSharedPointer<SshConnection> acquireConnection(const SshConnectionParameters &sshParams)
{
QMutexLocker locker(&m_listMutex);
// Check in-use connections:
foreach (SshConnection::Ptr connection, m_acquiredConnections) {
if (connection->connectionParameters() != sshParams)
continue;
if (connection->thread() != QThread::currentThread())
break;
if (m_deprecatedConnections.contains(connection)) // we were asked to no longer use this one...
break;
m_acquiredConnections.append(connection);
return connection;
}
// Checked cached open connections:
foreach (SshConnection::Ptr connection, m_unacquiredConnections) {
if (connection->state() != SshConnection::Connected
|| connection->connectionParameters() != sshParams)
continue;
if (connection->thread() != QThread::currentThread()) {
QMetaObject::invokeMethod(this, "switchToCallerThread",
Qt::BlockingQueuedConnection,
Q_ARG(SshConnection *, connection.data()),
Q_ARG(QObject *, QThread::currentThread()));
}
m_unacquiredConnections.removeOne(connection);
m_acquiredConnections.append(connection);
return connection;
}
// create a new connection:
SshConnection::Ptr connection = SshConnection::create(sshParams);
connect(connection.data(), SIGNAL(disconnected()), this, SLOT(cleanup()));
m_acquiredConnections.append(connection);
return connection;
}
void releaseConnection(const SshConnection::Ptr &connection)
{
QMutexLocker locker(&m_listMutex);
m_acquiredConnections.removeOne(connection);
if (!m_acquiredConnections.contains(connection)) {
// no longer in use:
connection->moveToThread(QCoreApplication::instance()->thread());
if (m_deprecatedConnections.contains(connection))
m_deprecatedConnections.removeAll(connection);
else if (connection->state() == SshConnection::Connected) {
// Make sure to only keep one connection open
bool haveConnection = false;
foreach (SshConnection::Ptr conn, m_unacquiredConnections) {
if (conn->connectionParameters() == connection->connectionParameters()) {
haveConnection = true;
break;
}
}
if (!haveConnection)
m_unacquiredConnections.append(connection);
}
}
}
void forceNewConnection(const SshConnectionParameters &sshParams)
{
QMutexLocker locker(&m_listMutex);
SshConnection::Ptr toReset;
foreach (SshConnection::Ptr connection, m_unacquiredConnections) {
if (connection->connectionParameters() == sshParams) {
toReset = connection;
break;
}
}
if (toReset.isNull()) {
foreach (SshConnection::Ptr connection, m_acquiredConnections) {
if (connection->connectionParameters() == sshParams) {
toReset = connection;
break;
}
}
}
if (!toReset.isNull() && !m_deprecatedConnections.contains(toReset))
m_deprecatedConnections.append(toReset);
}
private:
Q_INVOKABLE void switchToCallerThread(SshConnection *connection, QObject *threadObj)
{
connection->moveToThread(qobject_cast<QThread *>(threadObj));
}
private slots:
void cleanup()
{
QMutexLocker locker(&m_listMutex);
SshConnection *currentConnection = qobject_cast<SshConnection *>(sender());
if (!currentConnection)
return;
for (int i = m_unacquiredConnections.count() - 1; i >= 0; --i) {
if (m_unacquiredConnections.at(i) == currentConnection)
m_unacquiredConnections.removeAt(i);
}
}
private:
// We expect the number of concurrently open connections to be small.
// If that turns out to not be the case, we can still use a data
// structure with faster access.
QList<SshConnection::Ptr> m_unacquiredConnections;
QList<SshConnection::Ptr> m_acquiredConnections;
QList<SshConnection::Ptr> m_deprecatedConnections;
QMutex m_listMutex;
};
QMutex SshConnectionManagerPrivate::instanceMutex;
} // namespace Internal
SshConnectionManager &SshConnectionManager::instance()
{
QMutexLocker locker(&Internal::SshConnectionManagerPrivate::instanceMutex);
return Internal::SshConnectionManagerPrivate::instance();
}
SshConnectionManager::SshConnectionManager()
: d(new Internal::SshConnectionManagerPrivate)
{
}
SshConnectionManager::~SshConnectionManager()
{
}
SshConnection::Ptr SshConnectionManager::acquireConnection(const SshConnectionParameters &sshParams)
{
return d->acquireConnection(sshParams);
}
void SshConnectionManager::releaseConnection(const SshConnection::Ptr &connection)
{
d->releaseConnection(connection);
}
void SshConnectionManager::forceNewConnection(const SshConnectionParameters &sshParams)
{
d->forceNewConnection(sshParams);
}
} // namespace QSsh
#include "sshconnectionmanager.moc"
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