PrismLauncher/launcher/tasks/ConcurrentTask.cpp

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// SPDX-License-Identifier: GPL-3.0-only
/*
* Prism Launcher - Minecraft Launcher
* Copyright (c) 2022 flowln <flowlnlnln@gmail.com>
* Copyright (c) 2023 Rachel Powers <508861+Ryex@users.noreply.github.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, version 3.
*
* 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 <https://www.gnu.org/licenses/>.
*
* This file incorporates work covered by the following copyright and
* permission notice:
*
* Copyright 2013-2021 MultiMC Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "ConcurrentTask.h"
#include <QCoreApplication>
#include <QDebug>
#include "tasks/Task.h"
ConcurrentTask::ConcurrentTask(QObject* parent, QString task_name, int max_concurrent)
: Task(parent), m_name(task_name), m_total_max_size(max_concurrent)
{
setObjectName(task_name);
}
ConcurrentTask::~ConcurrentTask()
{
for (auto task : m_queue) {
if (task)
task->deleteLater();
}
}
auto ConcurrentTask::getStepProgress() const -> TaskStepProgressList
{
return m_task_progress.values();
}
void ConcurrentTask::addTask(Task::Ptr task)
{
m_queue.append(task);
}
void ConcurrentTask::executeTask()
{
// Start one task, startNext handles starting the up to the m_total_max_size
// while tracking the number currently being done
QMetaObject::invokeMethod(this, &ConcurrentTask::startNext, Qt::QueuedConnection);
}
bool ConcurrentTask::abort()
{
m_queue.clear();
m_aborted = true;
if (m_doing.isEmpty()) {
// Don't call emitAborted() here, we want to bypass the 'is the task running' check
emit aborted();
emit finished();
return true;
}
bool suceedeed = true;
QMutableHashIterator<Task*, Task::Ptr> doing_iter(m_doing);
while (doing_iter.hasNext()) {
auto task = doing_iter.next();
suceedeed &= (task.value())->abort();
}
if (suceedeed)
emitAborted();
else
emitFailed(tr("Failed to abort all running tasks."));
return suceedeed;
}
void ConcurrentTask::clear()
{
Q_ASSERT(!isRunning());
m_done.clear();
m_failed.clear();
m_queue.clear();
m_aborted = false;
m_progress = 0;
m_stepProgress = 0;
}
void ConcurrentTask::startNext()
{
if (m_aborted || m_doing.count() > m_total_max_size)
return;
if (m_queue.isEmpty() && m_doing.isEmpty() && !wasSuccessful()) {
emitSucceeded();
return;
}
if (m_queue.isEmpty())
return;
Task::Ptr next = m_queue.dequeue();
connect(next.get(), &Task::succeeded, this, [this, next]() { subTaskSucceeded(next); });
connect(next.get(), &Task::failed, this, [this, next](QString msg) { subTaskFailed(next, msg); });
connect(next.get(), &Task::status, this, [this, next](QString msg) { subTaskStatus(next, msg); });
connect(next.get(), &Task::details, this, [this, next](QString msg) { subTaskDetails(next, msg); });
connect(next.get(), &Task::stepProgress, this, [this, next](TaskStepProgress const& tp) { subTaskStepProgress(next, tp); });
connect(next.get(), &Task::progress, this, [this, next](qint64 current, qint64 total) { subTaskProgress(next, current, total); });
m_doing.insert(next.get(), next);
qsizetype num_starts = qMin(m_queue.size(), m_total_max_size - m_doing.size());
auto task_progress = std::make_shared<TaskStepProgress>(next->getUid());
m_task_progress.insert(next->getUid(), task_progress);
updateState();
updateStepProgress(*task_progress.get(), Operation::ADDED);
QCoreApplication::processEvents();
QMetaObject::invokeMethod(next.get(), &Task::start, Qt::QueuedConnection);
// Allow going up the number of concurrent tasks in case of tasks being added in the middle of a running task.
for (int i = 0; i < num_starts; i++)
QMetaObject::invokeMethod(this, &ConcurrentTask::startNext, Qt::QueuedConnection);
}
void ConcurrentTask::subTaskSucceeded(Task::Ptr task)
{
m_done.insert(task.get(), task);
m_succeeded.insert(task.get(), task);
m_doing.remove(task.get());
auto task_progress = m_task_progress.value(task->getUid());
task_progress->state = TaskStepState::Succeeded;
disconnect(task.get(), 0, this, 0);
emit stepProgress(*task_progress);
updateState();
updateStepProgress(*task_progress, Operation::REMOVED);
startNext();
}
void ConcurrentTask::subTaskFailed(Task::Ptr task, [[maybe_unused]] const QString& msg)
{
m_done.insert(task.get(), task);
m_failed.insert(task.get(), task);
m_doing.remove(task.get());
auto task_progress = m_task_progress.value(task->getUid());
task_progress->state = TaskStepState::Failed;
disconnect(task.get(), 0, this, 0);
emit stepProgress(*task_progress);
updateState();
updateStepProgress(*task_progress, Operation::REMOVED);
startNext();
}
void ConcurrentTask::subTaskStatus(Task::Ptr task, const QString& msg)
{
auto task_progress = m_task_progress.value(task->getUid());
task_progress->status = msg;
task_progress->state = TaskStepState::Running;
emit stepProgress(*task_progress);
if (totalSize() == 1) {
setStatus(msg);
}
}
void ConcurrentTask::subTaskDetails(Task::Ptr task, const QString& msg)
{
auto task_progress = m_task_progress.value(task->getUid());
task_progress->details = msg;
task_progress->state = TaskStepState::Running;
emit stepProgress(*task_progress);
if (totalSize() == 1) {
setDetails(msg);
}
}
void ConcurrentTask::subTaskProgress(Task::Ptr task, qint64 current, qint64 total)
{
auto task_progress = m_task_progress.value(task->getUid());
task_progress->update(current, total);
emit stepProgress(*task_progress);
updateStepProgress(*task_progress, Operation::CHANGED);
updateState();
if (totalSize() == 1) {
setProgress(task_progress->current, task_progress->total);
}
}
void ConcurrentTask::subTaskStepProgress(Task::Ptr task, TaskStepProgress const& task_progress)
{
Operation op = Operation::ADDED;
if (!m_task_progress.contains(task_progress.uid)) {
m_task_progress.insert(task_progress.uid, std::make_shared<TaskStepProgress>(task_progress));
op = Operation::ADDED;
emit stepProgress(task_progress);
updateStepProgress(task_progress, op);
} else {
auto tp = m_task_progress.value(task_progress.uid);
tp->old_current = tp->current;
tp->old_total = tp->total;
tp->current = task_progress.current;
tp->total = task_progress.total;
tp->status = task_progress.status;
tp->details = task_progress.details;
op = Operation::CHANGED;
emit stepProgress(*tp.get());
updateStepProgress(*tp.get(), op);
}
}
void ConcurrentTask::updateStepProgress(TaskStepProgress const& changed_progress, Operation op)
{
switch (op) {
case Operation::ADDED:
m_stepProgress += changed_progress.current;
m_stepTotalProgress += changed_progress.total;
break;
case Operation::REMOVED:
m_stepProgress -= changed_progress.current;
m_stepTotalProgress -= changed_progress.total;
break;
case Operation::CHANGED:
m_stepProgress -= changed_progress.old_current;
m_stepTotalProgress -= changed_progress.old_total;
m_stepProgress += changed_progress.current;
m_stepTotalProgress += changed_progress.total;
break;
}
}
void ConcurrentTask::updateState()
{
if (totalSize() > 1) {
setProgress(m_done.count(), totalSize());
setStatus(tr("Executing %1 task(s) (%2 out of %3 are done)")
.arg(QString::number(m_doing.count()), QString::number(m_done.count()), QString::number(totalSize())));
} else {
setProgress(m_stepProgress, m_stepTotalProgress);
QString status = tr("Please wait...");
if (m_queue.size() > 0) {
status = tr("Waiting for a task to start...");
} else if (m_doing.size() > 0) {
status = tr("Executing 1 task:");
} else if (m_done.size() > 0) {
status = tr("Task finished.");
}
setStatus(status);
}
}