1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
#include "ConcurrentTask.h"
#include <QDebug>
#include <QCoreApplication>
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 -> QList<TaskStepProgress>
{
QList<TaskStepProgress> task_progress;
for (auto progress : task_progress) {
task_progress.append(task_progress);
}
return task_progress;
}
void ConcurrentTask::addTask(Task::Ptr task)
{
m_queue.append(task);
}
void ConcurrentTask::executeTask()
{
// Start the least amount of tasks needed, but at least one
// int num_starts = qMax(1, qMin(m_total_max_size, m_queue.size()));
// for (int i = 0; i < num_starts; i++) {
// QMetaObject::invokeMethod(this, &ConcurrentTask::startNext, Qt::QueuedConnection);
// }
// Start One task, startNext hadles 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::stepProgress, this, [this, next](QList<TaskStepProgress> 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);
m_task_progress.insert(next->getUid(), std::make_shared<TaskStepProgress>(TaskStepProgress({next->getUid()})));
updateState();
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.
int num_starts = qMin(m_queue.size(), m_total_max_size - m_doing.size());
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());
m_task_progress.value(task->getUid())->state = TaskState::Succeeded;
disconnect(task.get(), 0, this, 0);
updateState();
startNext();
}
void ConcurrentTask::subTaskFailed(Task::Ptr task, const QString& msg)
{
m_done.insert(task.get(), task);
m_failed.insert(task.get(), task);
m_doing.remove(task.get());
m_task_progress.value(task->getUid())->state = TaskState::Failed;
disconnect(task.get(), 0, this, 0);
updateState();
startNext();
}
void ConcurrentTask::subTaskStatus(Task::Ptr task, const QString& msg)
{
auto taskProgress = m_task_progress.value(task->getUid());
taskProgress->status = msg;
updateState();
}
void ConcurrentTask::subTaskProgress(Task::Ptr task, qint64 current, qint64 total)
{
auto taskProgress = m_task_progress.value(task->getUid());
taskProgress->current = current;
taskProgress->total = total;
taskProgress->details = task->getDetails();
updateStepProgress();
updateState();
}
void ConcurrentTask::subTaskStepProgress(Task::Ptr task, QList<TaskStepProgress> task_step_progress)
{
for (auto progress : task_step_progress) {
if (!m_task_progress.contains(progress.uid))
m_task_progress.insert(progress.uid, std::make_shared<TaskStepProgress>(progress));
}
}
void ConcurrentTask::updateStepProgress()
{
qint64 current = 0, total = 0;
for ( auto taskProgress : m_task_progress ) {
current += taskProgress->current;
total += taskProgress->total;
}
m_stepProgress = current;
m_stepTotalProgress = total;
}
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 1 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);
}
}
|
