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wait out chan finish job #7

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wait out chan finish job #7

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15 changes: 10 additions & 5 deletions 17-ring-buffer-channel/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -6,17 +6,19 @@ import "log"
// Ref:
// https://tanzu.vmware.com/content/blog/a-channel-based-ring-buffer-in-go

func NewRingBuffer(inCh, outCh chan int) *ringBuffer {
func NewRingBuffer(inCh, outCh chan int, down chan bool) *ringBuffer {
return &ringBuffer{
inCh: inCh,
outCh: outCh,
down: down,
}
}

// ringBuffer throttle buffer for implement async channel.
type ringBuffer struct {
inCh chan int
outCh chan int
down chan bool
}

func (r *ringBuffer) Run() {
Expand All @@ -28,13 +30,15 @@ func (r *ringBuffer) Run() {
r.outCh <- v
}
}
r.down <- true
close(r.outCh)
}

func main() {
inCh := make(chan int)
outCh := make(chan int, 4) // try to change outCh buffer to understand the result
rb := NewRingBuffer(inCh, outCh)
down := make(chan bool, 1)
rb := NewRingBuffer(inCh, outCh, down)
go rb.Run()

for i := 0; i < 10; i++ {
Expand All @@ -43,8 +47,9 @@ func main() {

close(inCh)

for res := range outCh {
log.Println(res)
if <-down == true {
for res := range outCh {
log.Println(res)
}
}

}