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job.go
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job.go
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package main
import (
"encoding/json"
"errors"
"fmt"
"log"
"net/url"
"strings"
"time"
"github.com/jbsmith7741/uri"
"github.com/pcelvng/task"
"github.com/pcelvng/task-tools/file"
"github.com/pcelvng/task-tools/tmpl"
"github.com/pcelvng/task-tools/workflow"
"github.com/pcelvng/task/bus"
"github.com/robfig/cron/v3"
)
const DateHour = "2006-01-02T15"
type Cronjob struct {
Name string `uri:"-"`
Workflow string `uri:"-"`
Topic string `uri:"-"`
Schedule string `uri:"cron"`
Offset time.Duration `uri:"offset"`
Template string `uri:"-"`
// inherited from tm
producer bus.Producer `uri:"-"`
}
func (j *Cronjob) Run() {
tm := time.Now().Add(j.Offset)
info := tmpl.Parse(j.Template, tm)
tsk := task.New(j.Topic, info)
tsk.Meta = "workflow=" + j.Workflow
tsk.Meta += "&cron=" + tm.Format(DateHour)
if j.Name != "" {
tsk.Job = j.Name
tsk.Meta += "&job=" + j.Name
}
j.producer.Send(j.Topic, tsk.JSONBytes())
}
func (tm *taskMaster) NewJob(ph workflow.Phase, path string) (cron.Job, error) {
fOps := file.Options{}
if tm.fOpts != nil {
fOps = *tm.fOpts
}
bJob := &batchJob{
Cronjob: Cronjob{
Name: ph.Job(),
Workflow: path,
Topic: ph.Topic(),
//Schedule: pull from uri,
Template: ph.Template,
producer: tm.producer,
},
alerts: tm.alerts,
fOpts: fOps,
}
u := url.URL{}
u.RawQuery = ph.Rule
if err := uri.Unmarshal(u.String(), bJob); err != nil {
return nil, err
}
// return Cronjob if not batch params
if bJob.For == 0 && bJob.FilePath == "" && len(bJob.Meta) == 0 {
return &bJob.Cronjob, nil
}
if bJob.FilePath != "" && len(bJob.Meta) > 0 {
return nil, errors.New("meta_file and meta can not be used at the same time")
}
return bJob, nil
}
type batchJob struct {
Cronjob
For time.Duration `uri:"for"`
By string `uri:"by"`
Meta map[string][]string `uri:"meta"`
FilePath string `uri:"meta-file"`
fOpts file.Options
alerts chan task.Task
}
// Run a batchJob
func (b *batchJob) Run() {
t := time.Now().Add(b.Offset).Truncate(time.Hour)
tasks, err := b.Batch(t)
if err != nil {
log.Println(err)
tsk := *task.New(b.Topic, b.Template)
tsk.Job = b.Name
tsk.Result = task.ErrResult
tsk.Msg = err.Error()
b.alerts <- tsk //notify flowlord of issues
return
}
for _, t := range tasks {
if err := b.producer.Send(t.Type, t.JSONBytes()); err != nil {
t.Result = task.ErrResult
t.Msg = err.Error()
b.alerts <- t //notify flowlord of issues
}
}
}
// Batch will create a range of jobs either by date or per line in a reference file
func (b *batchJob) Batch(t time.Time) ([]task.Task, error) {
var err error
start := t
if start.IsZero() {
start = time.Now().Truncate(time.Hour)
}
end := start.Add(b.For)
var data []tmpl.GetMap
if len(b.Meta) != 0 {
if data, err = createMeta(b.Meta); err != nil {
return nil, err
}
}
if b.FilePath != "" {
reader, err := file.NewGlobReader(b.FilePath, &b.fOpts)
if err != nil {
return nil, fmt.Errorf("file %q error %w", b.FilePath, err)
}
scanner := file.NewScanner(reader)
for scanner.Scan() {
row := make(tmpl.GetMap)
if err := json.Unmarshal(scanner.Bytes(), &row); err != nil {
return nil, err
}
data = append(data, row)
}
}
// handle `by` iterator
var byIter func(time.Time) time.Time
switch strings.ToLower(b.By) {
case "hour", "hourly":
byIter = func(t time.Time) time.Time { return t.Add(time.Hour) }
case "month", "monthly":
byIter = func(t time.Time) time.Time { return t.AddDate(0, 1, 0) }
default:
fallthrough
case "day", "daily":
byIter = func(t time.Time) time.Time { return t.AddDate(0, 0, 1) }
}
var reverseTasks bool
if end.Before(start) {
reverseTasks = true
t := end
end = start
start = t
}
// create the batch tasks
tasks := make([]task.Task, 0)
for t := start; end.Sub(t) >= 0; t = byIter(t) {
info := tmpl.Parse(b.Template, t)
tskMeta := make(url.Values)
tskMeta.Set("workflow", b.Workflow)
tskMeta.Set("cron", t.Format(DateHour))
job := b.Name
if job != "" {
tskMeta.Set("job", job)
}
for _, d := range data { // meta data tasks
i, keys := tmpl.Meta(info, d)
tsk := *task.New(b.Topic, i)
tsk.Job = job
// add matching keys as meta data
for _, k := range keys {
tskMeta.Set(k, d.Get(k))
}
tsk.Meta, _ = url.QueryUnescape(tskMeta.Encode())
tasks = append(tasks, tsk)
}
if len(data) == 0 { // time only tasks
tsk := *task.New(b.Topic, info)
tsk.Job = job
tsk.Meta, _ = url.QueryUnescape(tskMeta.Encode())
tasks = append(tasks, tsk)
}
}
if reverseTasks {
tmp := make([]task.Task, len(tasks))
for i := 0; i < len(tasks); i++ {
tmp[i] = tasks[len(tasks)-i-1]
}
tasks = tmp
}
return tasks, nil
}
func createMeta(data map[string][]string) ([]tmpl.GetMap, error) {
var result []tmpl.GetMap
for k, vals := range data {
if result == nil {
result = make([]tmpl.GetMap, len(vals))
}
if len(vals) != len(result) {
log.Println("inconsistent lengths")
return nil, fmt.Errorf("inconsistent lengths in meta %d != %d", len(vals), len(result))
}
for i, v := range vals {
if result[i] == nil {
result[i] = make(tmpl.GetMap)
}
result[i][k] = v
}
}
return result, nil
}