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// Copyright (C) 2021 The Qt Company Ltd.
// Copyright (C) 2019 Luxoft Sweden AB
// Copyright (C) 2018 Pelagicore AG
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <QCoreApplication>
#include <QTimer>
#include <QMetaObject>
#include "logging.h"
#include "abstractcontainer.h"
#include "abstractruntime.h"
#include "containerfactory.h"
#include "runtimefactory.h"
#include "quicklauncher.h"
#include "systemreader.h"
#include <memory>
QT_BEGIN_NAMESPACE_AM
QuickLauncher *QuickLauncher::s_instance = nullptr;
QuickLauncher *QuickLauncher::createInstance(int runtimesPerContainer, qreal idleLoad)
{
if (Q_UNLIKELY(s_instance))
qFatal("QuickLauncher instance already exists");
s_instance = new QuickLauncher();
s_instance->initialize(runtimesPerContainer, idleLoad);
return s_instance;
}
QuickLauncher *QuickLauncher::instance()
{
return s_instance;
}
QuickLauncher::QuickLauncher(QObject *parent)
: QObject(parent)
{ }
QuickLauncher::~QuickLauncher()
{
if (m_idleTimerId)
killTimer(m_idleTimerId);
delete m_idleCpu;
s_instance = nullptr;
}
void QuickLauncher::initialize(int runtimesPerContainer, qreal idleLoad)
{
ContainerFactory *cf = ContainerFactory::instance();
RuntimeFactory *rf = RuntimeFactory::instance();
qCDebug(LogSystem) << "Setting up the quick-launch pool:";
const QStringList allContainerIds = cf->containerIds();
for (const QString &containerId : allContainerIds) {
if (!cf->manager(containerId)->supportsQuickLaunch())
continue;
const QStringList allRuntimeIds = rf->runtimeIds();
for (const QString &runtimeId : allRuntimeIds) {
if (rf->manager(runtimeId)->inProcess())
continue;
QuickLaunchEntry entry;
entry.m_containerId = containerId;
entry.m_maximum = runtimesPerContainer;
if (rf->manager(runtimeId)->supportsQuickLaunch())
entry.m_runtimeId = runtimeId;
m_quickLaunchPool << entry;
qCDebug(LogSystem).nospace().noquote() << " * " << entry.m_containerId << " / "
<< (entry.m_runtimeId.isEmpty() ? qSL("(no runtime)") : entry.m_runtimeId)
<< " [at max: " << runtimesPerContainer << "]";
}
}
if (idleLoad > 0) {
m_idleThreshold = idleLoad;
m_idleCpu = new CpuReader();
m_idleTimerId = startTimer(1000);
}
triggerRebuild();
}
void QuickLauncher::timerEvent(QTimerEvent *te)
{
if (te && te->timerId() == m_idleTimerId) {
bool nowIdle = (m_idleCpu->readLoadValue() <= m_idleThreshold);
if (nowIdle != m_isIdle) {
m_isIdle = nowIdle;
if (m_isIdle)
rebuild();
}
}
}
void QuickLauncher::rebuild()
{
if (m_shuttingDown)
return;
int todo = 0;
int done = 0;
for (auto entry = m_quickLaunchPool.begin(); entry != m_quickLaunchPool.end(); ++entry) {
if (entry->m_containersAndRuntimes.size() < entry->m_maximum) {
todo += (entry->m_maximum - entry->m_containersAndRuntimes.size());
if (done >= 1)
continue;
std::unique_ptr<AbstractContainer> ac(ContainerFactory::instance()->create(entry->m_containerId, nullptr));
if (!ac) {
qCWarning(LogSystem) << "ERROR: Could not create quick-launch container with id"
<< entry->m_containerId;
continue;
}
std::unique_ptr<AbstractRuntime> ar;
if (!entry->m_runtimeId.isEmpty()) {
ar.reset(RuntimeFactory::instance()->createQuickLauncher(ac.release(), entry->m_runtimeId));
if (!ar) {
qCWarning(LogSystem) << "ERROR: Could not create quick-launch runtime with id"
<< entry->m_runtimeId << "within container with id"
<< entry->m_containerId;
continue;
}
if (!ar->start()) {
qCWarning(LogSystem) << "ERROR: Could not start quick-launch runtime with id"
<< entry->m_runtimeId << "within container with id"
<< entry->m_containerId;
continue;
}
}
AbstractContainer *container = ar ? ar.get()->container() : ac.release();
AbstractRuntime *runtime = ar.release();
connect(container, &AbstractContainer::destroyed, this, [this, container]() { removeEntry(container, nullptr); });
if (runtime)
connect(runtime, &AbstractRuntime::destroyed, this, [this, runtime]() { removeEntry(nullptr, runtime); });
entry->m_containersAndRuntimes << qMakePair(container, runtime);
++done;
qCDebug(LogSystem).noquote() << "Added a new entry to the quick-launch pool:"
<< entry->m_containerId << "/"
<< (entry->m_runtimeId.isEmpty() ? qSL("(no runtime)") : entry->m_runtimeId);
}
}
if (todo > done)
triggerRebuild(1000);
}
void QuickLauncher::triggerRebuild(int delay)
{
QTimer::singleShot(delay, this, &QuickLauncher::rebuild);
}
void QuickLauncher::removeEntry(AbstractContainer *container, AbstractRuntime *runtime)
{
int carCount = 0;
int carRemoved = 0;
for (auto entry = m_quickLaunchPool.begin(); entry != m_quickLaunchPool.end(); ++entry) {
for (int i = 0; i < entry->m_containersAndRuntimes.size(); ++i) {
auto car = entry->m_containersAndRuntimes.at(i);
if ((container && car.first == container)
|| (runtime && car.second == runtime)) {
qCDebug(LogSystem) << "Removed quicklaunch entry for container/runtime" << container << runtime;
entry->m_containersAndRuntimes.removeAt(i--);
carRemoved++;
}
carCount += entry->m_containersAndRuntimes.count();
}
}
// make sure to only emit shutDownFinished once: when the list gets empty for the first time.
// (removeEntry could be called again afterwards and it wouldn't actually remove anything, but
// without this guard, it would emit the signal multiple times)
if (m_shuttingDown && (carRemoved > 0) && (carCount == 0))
emit shutDownFinished();
}
QPair<AbstractContainer *, AbstractRuntime *> QuickLauncher::take(const QString &containerId, const QString &runtimeId)
{
QPair<AbstractContainer *, AbstractRuntime *> result(nullptr, nullptr);
// 1st pass: find entry with matching container and runtime
// 2nd pass: find entry with matching container and no runtime
for (int pass = 1; pass <= 2; ++pass) {
for (auto entry = m_quickLaunchPool.begin(); entry != m_quickLaunchPool.end(); ++entry) {
if (entry->m_containerId == containerId) {
if (((pass == 1) && (entry->m_runtimeId == runtimeId))
|| ((pass == 2) && (entry->m_runtimeId.isEmpty()))) {
if (!entry->m_containersAndRuntimes.isEmpty()) {
result = entry->m_containersAndRuntimes.takeFirst();
result.first->disconnect(this);
if (result.second)
result.second->disconnect(this);
triggerRebuild();
pass = 2;
break;
}
}
}
}
}
return result;
}
void QuickLauncher::shutDown()
{
m_shuttingDown = true;
bool waitForRemove = false;
for (auto entry = m_quickLaunchPool.begin(); entry != m_quickLaunchPool.end(); ++entry) {
for (const auto &car : qAsConst(entry->m_containersAndRuntimes)) {
if (car.second)
car.second->stop();
else if (car.first)
car.first->deleteLater();
if (car.first || car.second)
waitForRemove = true;
}
}
if (!waitForRemove)
QMetaObject::invokeMethod(this, &QuickLauncher::shutDownFinished, Qt::QueuedConnection);
}
QT_END_NAMESPACE_AM
#include "moc_quicklauncher.cpp"
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