-
Notifications
You must be signed in to change notification settings - Fork 6
/
entry_reader.go
154 lines (141 loc) · 3.78 KB
/
entry_reader.go
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
package entry_reader
import (
"github.com/ErdemOzgen/blackdagger/internal/engine"
"github.com/ErdemOzgen/blackdagger/internal/logger"
"github.com/ErdemOzgen/blackdagger/internal/logger/tag"
"github.com/ErdemOzgen/blackdagger/service/core/scheduler/filenotify"
"github.com/ErdemOzgen/blackdagger/service/core/scheduler/scheduler"
"os"
"path/filepath"
"strings"
"sync"
"time"
"github.com/ErdemOzgen/blackdagger/internal/dag"
"github.com/ErdemOzgen/blackdagger/internal/utils"
"github.com/fsnotify/fsnotify"
)
type JobFactory interface {
NewJob(dag *dag.DAG, next time.Time) scheduler.Job
}
type Params struct {
DagsDir string
JobFactory JobFactory
Logger logger.Logger
EngineFactory engine.Factory
}
type EntryReader struct {
dagsDir string
dagsLock sync.Mutex
dags map[string]*dag.DAG
jf JobFactory
logger logger.Logger
engineFactory engine.Factory
}
func New(params Params) *EntryReader {
er := &EntryReader{
dagsDir: params.DagsDir,
dagsLock: sync.Mutex{},
dags: map[string]*dag.DAG{},
jf: params.JobFactory,
logger: params.Logger,
engineFactory: params.EngineFactory,
}
if err := er.initDags(); err != nil {
er.logger.Error("failed to init entry_reader dags", tag.Error(err))
}
go er.watchDags()
return er
}
func (er *EntryReader) Read(now time.Time) ([]*scheduler.Entry, error) {
var entries []*scheduler.Entry
er.dagsLock.Lock()
defer er.dagsLock.Unlock()
f := func(d *dag.DAG, s []*dag.Schedule, e scheduler.Type) {
for _, ss := range s {
next := ss.Parsed.Next(now)
entries = append(entries, &scheduler.Entry{
Next: ss.Parsed.Next(now),
// TODO: fix this
Job: er.jf.NewJob(d, next),
EntryType: e,
Logger: er.logger,
})
}
}
e := er.engineFactory.Create()
for _, d := range er.dags {
if e.IsSuspended(d.Name) {
continue
}
f(d, d.Schedule, scheduler.Start)
f(d, d.StopSchedule, scheduler.Stop)
f(d, d.RestartSchedule, scheduler.Restart)
}
return entries, nil
}
func (er *EntryReader) initDags() error {
er.dagsLock.Lock()
defer er.dagsLock.Unlock()
cl := dag.Loader{}
fis, err := os.ReadDir(er.dagsDir)
if err != nil {
return err
}
var fileNames []string
for _, fi := range fis {
if utils.MatchExtension(fi.Name(), dag.EXTENSIONS) {
dag, err := cl.LoadMetadata(filepath.Join(er.dagsDir, fi.Name()))
if err != nil {
er.logger.Error("failed to read DAG cfg", tag.Error(err))
continue
}
er.dags[fi.Name()] = dag
fileNames = append(fileNames, fi.Name())
}
}
er.logger.Info("init backend dags", "files", strings.Join(fileNames, ","))
return nil
}
func (er *EntryReader) watchDags() {
cl := dag.Loader{}
watcher, err := filenotify.New(time.Minute)
if err != nil {
er.logger.Error("failed to init file watcher", tag.Error(err))
return
}
defer func() {
_ = watcher.Close()
}()
_ = watcher.Add(er.dagsDir)
for {
select {
case event, ok := <-watcher.Events():
if !ok {
return
}
if !utils.MatchExtension(event.Name, dag.EXTENSIONS) {
continue
}
er.dagsLock.Lock()
if event.Op == fsnotify.Create || event.Op == fsnotify.Write {
dag, err := cl.LoadMetadata(filepath.Join(er.dagsDir, filepath.Base(event.Name)))
if err != nil {
er.logger.Error("failed to read DAG cfg", tag.Error(err))
} else {
er.dags[filepath.Base(event.Name)] = dag
er.logger.Info("reload DAG entry_reader", "file", event.Name)
}
}
if event.Op == fsnotify.Rename || event.Op == fsnotify.Remove {
delete(er.dags, filepath.Base(event.Name))
er.logger.Info("remove DAG entry_reader", "file", event.Name)
}
er.dagsLock.Unlock()
case err, ok := <-watcher.Errors():
if !ok {
return
}
er.logger.Error("watch entry_reader DAGs error", tag.Error(err))
}
}
}