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JobQueue.go
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JobQueue.go
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package services
import (
"sort"
"sync"
"time"
libremotebuild "github.com/JojiiOfficial/LibRemotebuild"
"github.com/JojiiOfficial/Remotebuild/models"
"github.com/jinzhu/gorm"
log "github.com/sirupsen/logrus"
)
// JobQueue a queue for jobs
type JobQueue struct {
db *gorm.DB
config *models.Config
jobs []JobQueueItem
mx sync.RWMutex
stopped chan bool
currJob *JobQueueItem
getContainer ContainerGetter
}
// NewJobQueue create a new JobQueue
func NewJobQueue(db *gorm.DB, config *models.Config, getContainer ContainerGetter) *JobQueue {
queue := &JobQueue{
db: db,
config: config,
getContainer: getContainer,
stopped: make(chan bool, 1),
}
// Load Queue
err := queue.Load()
if err != nil {
log.Fatalln(err)
}
return queue
}
// Load queue from Db
func (jq *JobQueue) Load() error {
var jobs []JobQueueItem
// Load unfinished jobs
err := jq.db.Model(&JobQueueItem{}).
Preload("Job").
Preload("Job.BuildJob").
Preload("Job.UploadJob").
Find(&jobs).Error
if err != nil {
return err
}
var jobsToUse []JobQueueItem
for i := range jobs {
// Init Job
err := jobs[i].Job.Init(jq.db, jq.config)
if err != nil {
log.Error(err)
continue
}
jobState := jobs[i].Job.GetState()
// Set running jobs to waiting
if jobState == libremotebuild.JobRunning {
jobState = libremotebuild.JobWaiting
jobs[i].Job.SetState(libremotebuild.JobWaiting)
}
// Ignore cancelled/failed/finished jobs
if jobState == libremotebuild.JobRunning || jobState == libremotebuild.JobWaiting {
jobsToUse = append(jobsToUse, jobs[i])
}
}
jq.jobs = jobsToUse
log.Infof("Loaded %d Jobs from old queue", len(jobsToUse))
return nil
}
// AddNewJob create job and add to queue
func (jq *JobQueue) AddNewJob(db *gorm.DB, Type libremotebuild.JobType, uploadType libremotebuild.UploadType, args map[string]string, useCcache bool) (*JobQueueItem, error) {
// Get image
image, err := jq.getContainer(Type)
if err != nil {
return nil, err
}
// Create job
job, err := models.NewJob(db, jq.config, image, models.BuildJob{
Type: Type,
}, models.UploadJob{
Type: uploadType,
}, args, useCcache)
if err != nil {
return nil, err
}
// add job to queue
return jq.AddJob(job)
}
// AddJob to a jobqueue
func (jq *JobQueue) AddJob(job *models.Job) (*JobQueueItem, error) {
item := &JobQueueItem{
JobID: job.ID,
Job: job,
}
// Insert Item
err := jq.db.Create(item).Error
if err != nil {
return nil, err
}
// Use ID as Position
item.Position = item.ID
err = jq.db.Save(item).Error
if err != nil {
return nil, err
}
jq.mx.Lock()
defer jq.mx.Unlock()
jq.jobs = append(jq.jobs, *item)
log.Debugf("Job %d added", item.ID)
return item, nil
}
// Start the queue async
func (jq *JobQueue) Start() {
go jq.Run()
}
// Run the queue
func (jq *JobQueue) Run() {
log.Info("Starting JobQueue")
for {
job := jq.getNextJob()
jq.run(job)
jq.currJob = nil
// Only continue if not stopped
select {
case <-jq.stopped:
log.Info("Stopped JobQueue")
return
default:
}
}
}
// Run a QueueItem
func (jq *JobQueue) run(jqi *JobQueueItem) {
// Job is done after run, whatever
// state it exited
defer func() {
// Delete jqi
if err := jq.db.Delete(&jqi).Error; err != nil {
log.Warn(err)
}
jqi.Deleted = true
jq.RemoveJob(jqi.ID)
}()
// Get Job
if err := jqi.Load(jq.db, jq.config); err != nil {
log.Error(err)
return
}
jq.currJob = jqi
jqi.RunningSince = time.Now()
// Run job and log errors
if err := jqi.Job.Run(); err != nil {
if err != models.ErrorJobCancelled {
log.Warn("Job exited with error: ", err)
} else {
log.Info("Job cancelled successfully")
}
}
}
func (jq *JobQueue) sortPosition() {
sort.Sort(SortByPosition(jq.jobs))
}
func (jq *JobQueue) getNextJob() *JobQueueItem {
for len(jq.jobs) == 0 {
time.Sleep(1 * time.Second)
}
jq.sortPosition()
return &jq.jobs[0]
}
// FindJob find job in queue
func (jq *JobQueue) FindJob(jobID uint) *JobQueueItem {
// Find job in Queue slice
for j := range jq.jobs {
if jq.jobs[j].JobID == jobID {
return &jq.jobs[j]
}
}
return nil
}
// RemoveJob remove item from jobQueue
func (jq *JobQueue) RemoveJob(jobID uint) {
if jq.currJob != nil && jq.currJob.Job.ID == jobID {
jq.currJob = nil
}
i := -1
// Find job in Queue slice
for j := range jq.jobs {
if jq.jobs[j].JobID == jobID {
i = j
break
}
}
jq.mx.Lock()
defer jq.mx.Unlock()
// Remove job from actual slice
jq.jobs[len(jq.jobs)-1], jq.jobs[i] = jq.jobs[i], jq.jobs[len(jq.jobs)-1]
jq.jobs = jq.jobs[:len(jq.jobs)-1]
}
// GetJobQueuePos position of job in the queue
func (jq *JobQueue) GetJobQueuePos(jiq *JobQueueItem) int {
jq.sortPosition()
for i := range jq.jobs {
if jq.jobs[i].ID == jiq.ID {
return i
}
}
return -1
}
// GetJobs return jobs in queue
func (jq *JobQueue) GetJobs() []JobQueueItem {
var validJobs []JobQueueItem
// Build slice with non-deleted jobs
for i := range jq.jobs {
if !jq.jobs[i].Deleted {
validJobs = append(validJobs, jq.jobs[i])
}
}
jq.mx.Lock()
defer jq.mx.Unlock()
sort.Sort(SortByPosition(validJobs))
return validJobs
}
func (jq *JobQueue) stop() {
jq.stopped <- true
if jq.currJob != nil {
jq.currJob.Job.Cancel()
}
}