-
Notifications
You must be signed in to change notification settings - Fork 123
/
main.go
78 lines (71 loc) · 1.56 KB
/
main.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
package main
import (
"fmt"
"log"
"math/rand"
"sync"
"time"
"github.com/vbauerster/mpb/v8"
"github.com/vbauerster/mpb/v8/decor"
)
func main() {
total, numBars := 100, 2
var wg sync.WaitGroup
wg.Add(numBars)
done := make(chan interface{})
p := mpb.New(
mpb.WithWidth(64),
mpb.WithWaitGroup(&wg),
mpb.WithShutdownNotifier(done),
)
log.SetOutput(p)
for i := 0; i < numBars; i++ {
name := fmt.Sprintf("Bar#%d:", i)
bar := p.AddBar(int64(total),
mpb.PrependDecorators(
decor.Name(name),
decor.Percentage(decor.WCSyncSpace),
),
mpb.AppendDecorators(
decor.OnComplete(
decor.EwmaETA(decor.ET_STYLE_GO, 30, decor.WCSyncWidth), "done",
),
),
)
// simulating some work
go func() {
defer wg.Done()
rng := rand.New(rand.NewSource(time.Now().UnixNano()))
max := 100 * time.Millisecond
for i := 0; i < total; i++ {
// start variable is solely for EWMA calculation
// EWMA's unit of measure is an iteration's duration
start := time.Now()
time.Sleep(time.Duration(rng.Intn(10)+1) * max / 10)
// we need to call EwmaIncrement to fulfill ewma decorator's contract
bar.EwmaIncrement(time.Since(start))
}
log.Println(name, "done")
}()
}
var qwg sync.WaitGroup
qwg.Add(1)
go func() {
quit:
for {
select {
case <-done:
// after done, underlying io.Writer returns mpb.DoneError
// so following isn't printed
log.Println("all done")
break quit
default:
log.Println("waiting for done")
time.Sleep(100 * time.Millisecond)
}
}
qwg.Done()
}()
p.Wait()
qwg.Wait()
}