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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package jobs
import (
"context"
"time"
"net/http"
l4g "github.com/alecthomas/log4go"
"github.com/mattermost/platform/model"
)
const (
CANCEL_WATCHER_POLLING_INTERVAL = 5000
)
func CreateJob(jobType string, jobData map[string]string) (*model.Job, *model.AppError) {
job := model.Job{
Id: model.NewId(),
Type: jobType,
CreateAt: model.GetMillis(),
Status: model.JOB_STATUS_PENDING,
Data: jobData,
}
if err := job.IsValid(); err != nil {
return nil, err
}
if result := <-Srv.Store.Job().Save(&job); result.Err != nil {
return nil, result.Err
}
return &job, nil
}
func ClaimJob(job *model.Job) (bool, *model.AppError) {
if result := <-Srv.Store.Job().UpdateStatusOptimistically(job.Id, model.JOB_STATUS_PENDING, model.JOB_STATUS_IN_PROGRESS); result.Err != nil {
return false, result.Err
} else {
success := result.Data.(bool)
return success, nil
}
}
func SetJobProgress(job *model.Job, progress int64) *model.AppError {
job.Status = model.JOB_STATUS_IN_PROGRESS
job.Progress = progress
if result := <-Srv.Store.Job().UpdateOptimistically(job, model.JOB_STATUS_IN_PROGRESS); result.Err != nil {
return result.Err
} else {
return nil
}
}
func SetJobSuccess(job *model.Job) *model.AppError {
result := <-Srv.Store.Job().UpdateStatus(job.Id, model.JOB_STATUS_SUCCESS)
return result.Err
}
func SetJobError(job *model.Job, jobError *model.AppError) *model.AppError {
if jobError == nil {
result := <-Srv.Store.Job().UpdateStatus(job.Id, model.JOB_STATUS_ERROR)
return result.Err
}
job.Status = model.JOB_STATUS_ERROR
job.Progress = -1
if job.Data == nil {
job.Data = make(map[string]string)
}
job.Data["error"] = jobError.Error()
if result := <-Srv.Store.Job().UpdateOptimistically(job, model.JOB_STATUS_IN_PROGRESS); result.Err != nil {
return result.Err
} else {
if !result.Data.(bool) {
if result := <-Srv.Store.Job().UpdateOptimistically(job, model.JOB_STATUS_CANCEL_REQUESTED); result.Err != nil {
return result.Err
} else {
if !result.Data.(bool) {
return model.NewAppError("Jobs.SetJobError", "jobs.set_job_error.update.error", nil, "id="+job.Id, http.StatusInternalServerError)
}
}
}
}
return nil
}
func SetJobCanceled(job *model.Job) *model.AppError {
result := <-Srv.Store.Job().UpdateStatus(job.Id, model.JOB_STATUS_CANCELED)
return result.Err
}
func RequestCancellation(jobId string) *model.AppError {
if result := <-Srv.Store.Job().UpdateStatusOptimistically(jobId, model.JOB_STATUS_PENDING, model.JOB_STATUS_CANCELED); result.Err != nil {
return result.Err
} else if result.Data.(bool) {
return nil
}
if result := <-Srv.Store.Job().UpdateStatusOptimistically(jobId, model.JOB_STATUS_IN_PROGRESS, model.JOB_STATUS_CANCEL_REQUESTED); result.Err != nil {
return result.Err
} else if result.Data.(bool) {
return nil
}
return model.NewAppError("Jobs.RequestCancellation", "jobs.request_cancellation.status.error", nil, "id="+jobId, http.StatusInternalServerError)
}
func CancellationWatcher(ctx context.Context, jobId string, cancelChan chan interface{}) {
for {
select {
case <-ctx.Done():
l4g.Debug("CancellationWatcher for Job: %v Aborting as job has finished.", jobId)
return
case <-time.After(CANCEL_WATCHER_POLLING_INTERVAL * time.Millisecond):
l4g.Debug("CancellationWatcher for Job: %v polling.", jobId)
if result := <-Srv.Store.Job().Get(jobId); result.Err == nil {
jobStatus := result.Data.(*model.Job)
if jobStatus.Status == model.JOB_STATUS_CANCEL_REQUESTED {
close(cancelChan)
return
}
}
}
}
}
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