8e80b4bfc1
This tasks (or rather, meta-task) has the ability to run several other sub tasks concurrently. Signed-off-by: flow <flowlnlnln@gmail.com>
145 lines
3.1 KiB
C++
145 lines
3.1 KiB
C++
#include "ConcurrentTask.h"
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#include <QDebug>
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ConcurrentTask::ConcurrentTask(QObject* parent, QString task_name, int max_concurrent)
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: Task(parent), m_name(task_name), m_total_max_size(max_concurrent)
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{}
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ConcurrentTask::~ConcurrentTask()
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{
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for (auto task : m_queue) {
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if (task)
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task->deleteLater();
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}
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}
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auto ConcurrentTask::getStepProgress() const -> qint64
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{
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return m_stepProgress;
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}
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auto ConcurrentTask::getStepTotalProgress() const -> qint64
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{
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return m_stepTotalProgress;
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}
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void ConcurrentTask::addTask(Task::Ptr task)
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{
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if (!isRunning())
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m_queue.append(task);
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else
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qWarning() << "Tried to add a task to a running concurrent task!";
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}
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void ConcurrentTask::executeTask()
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{
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m_total_size = m_queue.size();
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for (int i = 0; i < m_total_max_size; i++)
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startNext();
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}
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bool ConcurrentTask::abort()
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{
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if (m_doing.isEmpty()) {
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// Don't call emitAborted() here, we want to bypass the 'is the task running' check
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emit aborted();
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emit finished();
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m_aborted = true;
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return true;
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}
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m_queue.clear();
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m_aborted = true;
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for (auto task : m_doing)
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m_aborted &= task->abort();
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if (m_aborted)
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emitAborted();
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return m_aborted;
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}
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void ConcurrentTask::startNext()
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{
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if (m_aborted || m_doing.count() > m_total_max_size)
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return;
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if (m_queue.isEmpty() && m_doing.isEmpty()) {
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emitSucceeded();
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return;
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}
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if (m_queue.isEmpty())
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return;
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Task::Ptr next = m_queue.dequeue();
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connect(next.get(), &Task::succeeded, this, [this, next] { subTaskSucceeded(next); });
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connect(next.get(), &Task::failed, this, [this, next](QString msg) { subTaskFailed(next, msg); });
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connect(next.get(), &Task::status, this, &ConcurrentTask::subTaskStatus);
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connect(next.get(), &Task::stepStatus, this, &ConcurrentTask::subTaskStatus);
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connect(next.get(), &Task::progress, this, &ConcurrentTask::subTaskProgress);
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m_doing.insert(next.get(), next);
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setStepStatus(next->isMultiStep() ? next->getStepStatus() : next->getStatus());
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updateState();
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next->start();
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}
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void ConcurrentTask::subTaskSucceeded(Task::Ptr task)
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{
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m_done.insert(task.get(), task);
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m_doing.remove(task.get());
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disconnect(task.get(), 0, this, 0);
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updateState();
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startNext();
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}
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void ConcurrentTask::subTaskFailed(Task::Ptr task, const QString& msg)
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{
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m_done.insert(task.get(), task);
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m_failed.insert(task.get(), task);
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m_doing.remove(task.get());
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disconnect(task.get(), 0, this, 0);
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updateState();
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startNext();
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}
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void ConcurrentTask::subTaskStatus(const QString& msg)
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{
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setStepStatus(msg);
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}
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void ConcurrentTask::subTaskProgress(qint64 current, qint64 total)
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{
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if (total == 0) {
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setProgress(0, 100);
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return;
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}
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m_stepProgress = current;
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m_stepTotalProgress = total;
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}
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void ConcurrentTask::updateState()
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{
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setProgress(m_done.count(), m_total_size);
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setStatus(tr("Executing %1 task(s) (%2 out of %3 are done)")
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.arg(QString::number(m_doing.count()), QString::number(m_done.count()), QString::number(m_total_size)));
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}
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