context 作用
context用来解决goroutine 之间传递上下文信息，包括：取消信号、超时时间、截止时间、k-v 等。
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
|
package main
import (
"context"
"fmt"
"time"
)
func main() {
ctx, cel := context.WithCancel(context.Background())
go pushDockerToHarbor(ctx)
go pushImageToMinio(ctx)
time.Sleep(6 * time.Second)
cel()
time.Sleep(5 * time.Second)
}
func pushImageToMinio(ctx context.Context) {
go func() {
fmt.Println("i doing push image to minio worker")
time.Sleep(5 * time.Second)
}()
for {
select {
case <-ctx.Done():
fmt.Println("canceled")
return
case <-time.After(30 * time.Minute):
fmt.Println("timeout")
return
}
}
}
func pushDockerToHarbor(ctx context.Context) {
go func() {
fmt.Println("i doing push docker to harbor worker")
time.Sleep(5 * time.Second)
}()
for {
select {
case <-ctx.Done():
fmt.Println("canceled")
return
case <-time.After(30 * time.Minute):
fmt.Println("timeout")
return
}
}
}
|
参考文档