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author | Petr Mrázek <peterix@gmail.com> | 2013-07-06 01:50:07 +0200 |
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committer | Petr Mrázek <peterix@gmail.com> | 2013-07-06 01:50:07 +0200 |
commit | 5c07e1b042ecd22dfcd3ea8cf656c99549cc984b (patch) | |
tree | 40e4f5277fb94488e8ad595790ada8daa88ba0c5 /libutil/include | |
parent | 84298d621dc1af8dc07a2b959b2225a1df230708 (diff) | |
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Move job queue to libutil
Diffstat (limited to 'libutil/include')
-rw-r--r-- | libutil/include/dlqueue.h | 49 | ||||
-rw-r--r-- | libutil/include/jobqueue.h | 179 |
2 files changed, 228 insertions, 0 deletions
diff --git a/libutil/include/dlqueue.h b/libutil/include/dlqueue.h new file mode 100644 index 00000000..9041e762 --- /dev/null +++ b/libutil/include/dlqueue.h @@ -0,0 +1,49 @@ +#pragma once +#include "jobqueue.h" +#include <QtNetwork> + +/** + * A single file for the downloader/cache to process. + */ +class DownloadJob : public Job +{ + Q_OBJECT +public: + DownloadJob(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString()); + static JobPtr create(QUrl url, QString rel_target_path = QString(), QString expected_md5 = QString()); + +public slots: + virtual void start(); + +private slots: + void downloadProgress(qint64 bytesReceived, qint64 bytesTotal);; + void downloadError(QNetworkReply::NetworkError error); + void downloadFinished(); + void downloadReadyRead(); + +public: + /// the associated network manager + QSharedPointer<QNetworkAccessManager> m_manager; + /// the network reply + QSharedPointer<QNetworkReply> m_reply; + /// source URL + QUrl m_url; + + /// if true, check the md5sum against a provided md5sum + /// also, if a file exists, perform an md5sum first and don't download only if they don't match + bool m_check_md5; + /// the expected md5 checksum + QString m_expected_md5; + + /// save to file? + bool m_save_to_file; + /// if saving to file, use the one specified in this string + QString m_rel_target_path; + /// this is the output file, if any + QFile m_output_file; + /// if not saving to file, downloaded data is placed here + QByteArray m_data; + + /// The file's status + JobStatus m_status; +}; diff --git a/libutil/include/jobqueue.h b/libutil/include/jobqueue.h new file mode 100644 index 00000000..061686f6 --- /dev/null +++ b/libutil/include/jobqueue.h @@ -0,0 +1,179 @@ +#pragma once +#include <QtCore> + +enum JobStatus +{ + Job_NotStarted, + Job_InProgress, + Job_Finished, + Job_Failed +}; + +class JobList; + +class Job : public QObject +{ + Q_OBJECT +protected: + explicit Job(): QObject(0){}; +public: + virtual ~Job() {}; +signals: + void finish(); + void fail(); + void progress(qint64 current, qint64 total); +public slots: + virtual void start() = 0; +}; +typedef QSharedPointer<Job> JobPtr; + +/** + * A list of jobs, to be processed one by one. + */ +class JobList : public QObject +{ + friend class JobListQueue; + Q_OBJECT +public: + + JobList() : QObject(0) + { + m_status = Job_NotStarted; + current_job_idx = 0; + } + JobStatus getStatus() + { + return m_status; + } + void add(JobPtr dlable) + { + if(m_status == Job_NotStarted) + m_jobs.append(dlable); + //else there's a bug. TODO: catch the bugs + } + JobPtr getFirstJob() + { + if(m_jobs.size()) + return m_jobs[0]; + else + return JobPtr(); + } + void start() + { + current_job_idx = 0; + auto job = m_jobs[current_job_idx]; + + connect(job.data(), SIGNAL(progress(qint64,qint64)), SLOT(currentJobProgress(qint64,qint64))); + connect(job.data(), SIGNAL(finish()), SLOT(currentJobFinished())); + connect(job.data(), SIGNAL(fail()), SLOT(currentJobFailed())); + job->start(); + emit started(); + } +private slots: + void currentJobFinished() + { + if(current_job_idx == m_jobs.size() - 1) + { + m_status = Job_Finished; + emit finished(); + } + else + { + current_job_idx++; + auto job = m_jobs[current_job_idx]; + connect(job.data(), SIGNAL(progress(qint64,qint64)), SLOT(currentJobProgress(qint64,qint64))); + connect(job.data(), SIGNAL(finish()), SLOT(currentJobFinished())); + connect(job.data(), SIGNAL(fail()), SLOT(currentJobFailed())); + job->start(); + } + } + void currentJobFailed() + { + m_status = Job_Failed; + emit failed(); + } + void currentJobProgress(qint64 current, qint64 total) + { + if(!total) + return; + + int total_jobs = m_jobs.size(); + + if(!total_jobs) + return; + + float job_chunk = 1000.0 / float(total_jobs); + float cur = current; + float tot = total; + float last_chunk = (cur / tot) * job_chunk; + + float list_total = job_chunk * current_job_idx + last_chunk; + emit progress(qint64(list_total), 1000LL); + } +private: + QVector<JobPtr> m_jobs; + /// The overall status of this job list + JobStatus m_status; + int current_job_idx; +signals: + void progress(qint64 current, qint64 total); + void started(); + void finished(); + void failed(); +}; +typedef QSharedPointer<JobList> JobListPtr; + + +/** + * A queue of job lists! The job lists fail or finish as units. + */ +class JobListQueue : public QObject +{ + Q_OBJECT +public: + JobListQueue(QObject *p = 0): + QObject(p), + currentIndex(0), + is_running(false){} + + void enqueue(JobListPtr job) + { + jobs.enqueue(job); + + // finish or fail, we should catch that and start the next one + connect(job.data(),SIGNAL(finished()), SLOT(startNextJob())); + connect(job.data(),SIGNAL(failed()), SLOT(startNextJob())); + + if(!is_running) + { + QTimer::singleShot(0, this, SLOT(startNextJob())); + } + } + +private slots: + void startNextJob() + { + if (jobs.isEmpty()) + { + currentJobList.clear(); + currentIndex = 0; + is_running = false; + emit finishedAllJobs(); + return; + } + + currentJobList = jobs.dequeue(); + is_running = true; + currentIndex = 0; + currentJobList->start(); + } + +signals: + void finishedAllJobs(); + +private: + JobListPtr currentJobList; + QQueue<JobListPtr> jobs; + unsigned currentIndex; + bool is_running; +}; |