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package main
import (
"fmt"
"io"
"math/rand"
"sync/atomic"
"time"
"github.com/vbauerster/mpb/v8"
"github.com/vbauerster/mpb/v8/decor"
)
var curTask uint32
var doneTasks uint32
type task struct {
id uint32
total int64
bar *mpb.Bar
}
func main() {
numTasks := 4
var total int64
var filler mpb.BarFiller
tasks := make([]*task, numTasks)
for i := 0; i < numTasks; i++ {
task := &task{
id: uint32(i),
total: rand.Int63n(666) + 100,
}
total += task.total
filler = middleware(filler, task.id)
tasks[i] = task
}
filler = newLineMiddleware(filler)
p := mpb.New()
for i := 0; i < numTasks; i++ {
bar := p.AddBar(tasks[i].total,
mpb.BarExtender(filler, true), // all bars share same extender filler
mpb.BarFuncOptional(func() mpb.BarOption {
return mpb.BarQueueAfter(tasks[i-1].bar)
}, i != 0),
mpb.PrependDecorators(
decor.Name("current:", decor.WCSyncWidthR),
),
mpb.AppendDecorators(
decor.Percentage(decor.WCSyncWidth),
),
)
tasks[i].bar = bar
}
tb := p.AddBar(0,
mpb.PrependDecorators(
decor.Any(func(st decor.Statistics) string {
return fmt.Sprintf("TOTAL(%d/%d)", atomic.LoadUint32(&doneTasks), len(tasks))
}, decor.WCSyncWidthR),
),
mpb.AppendDecorators(
decor.Percentage(decor.WCSyncWidth),
),
)
tb.SetTotal(total, false)
for _, t := range tasks {
atomic.StoreUint32(&curTask, t.id)
complete(t.bar, tb)
atomic.AddUint32(&doneTasks, 1)
}
tb.EnableTriggerComplete()
p.Wait()
}
func middleware(base mpb.BarFiller, id uint32) mpb.BarFiller {
var done bool
fn := func(w io.Writer, st decor.Statistics) error {
if !done {
if atomic.LoadUint32(&curTask) != id {
_, err := fmt.Fprintf(w, " Taksk %02d\n", id)
return err
}
if !st.Completed {
_, err := fmt.Fprintf(w, "=> Taksk %02d\n", id)
return err
}
done = true
}
_, err := fmt.Fprintf(w, " Taksk %02d: Done!\n", id)
return err
}
if base == nil {
return mpb.BarFillerFunc(fn)
}
return mpb.BarFillerFunc(func(w io.Writer, st decor.Statistics) error {
err := fn(w, st)
if err != nil {
return err
}
return base.Fill(w, st)
})
}
func newLineMiddleware(base mpb.BarFiller) mpb.BarFiller {
return mpb.BarFillerFunc(func(w io.Writer, st decor.Statistics) error {
_, err := fmt.Fprintln(w)
if err != nil {
return err
}
return base.Fill(w, st)
})
}
func complete(bar, totalBar *mpb.Bar) {
max := 100 * time.Millisecond
for !bar.Completed() {
n := rand.Int63n(10) + 1
incrementBars(n, bar, totalBar)
time.Sleep(time.Duration(n) * max / 10)
}
bar.Wait()
}
func incrementBars(n int64, bb ...*mpb.Bar) {
for _, b := range bb {
b.IncrInt64(n)
}
}
|
