仅需任意任务完成
func runTask(id int) string {
time.Sleep(10 * time.Millisecond)
return fmt.Sprintf("The result is from %d", id)
}
func FirstResponse() string {
numOfRunner := 10
ch := make(chan string, numOfRunner)
for i := 0; i < numOfRunner; i++ {
go func(i int) {
ret := runTask(i)
ch <- ret
}(i)
}
return <-ch
}
func TestFirstResponse(t *testing.T) {
t.Log("Before:", runtime.NumGoroutine())
t.Log(FirstResponse())
time.Sleep(time.Second * 1)
t.Log("After:", runtime.NumGoroutine())
}
必需所有任务完成
func runTask(id int) string {
time.Sleep(10 * time.Millisecond)
return fmt.Sprintf("The result is from %d", id)
}
func AllResponse() string {
numOfRunner := 10
ch := make(chan string, numOfRunner)
for i := 0; i < numOfRunner; i++ {
go func(i int) {
ret := runTask(i)
ch <- ret
}(i)
}
finalRet := ""
for j := 0; j < numOfRunner; j++ {
finalRet += <-ch + "\n"
}
return finalRet
}
func TestFirstResponse(t *testing.T) {
t.Log("Before:", runtime.NumGoroutine())
t.Log(AllResponse())
time.Sleep(time.Second * 1)
t.Log("After:", runtime.NumGoroutine())
}
也可以用waitgroup等待所有任务的完成
