coding conent for deadline pattern

resiliency/03_deadline/README.md

@@ -0,0 +1,5 @@
+# deadline pattern
+
+do a thing ,until the deadline time point
+
+which act like time.after(), but time.after() only do once.

resiliency/03_deadline/deadline.go

@@ -1,3 +1,11 @@
+/*
+ * @Description: https://github.com/crazybber
+ * @Author: Edward
+ * @Date: 2020-06-05 12:43:39
+ * @Last Modified by: Edward
+ * @Last Modified time: 2020-06-05 12:56:40
+ */
+
 // Package deadline implements the deadline (also known as "timeout") resiliency pattern for Go.
 package deadline
 
@@ -12,10 +20,11 @@ var ErrTimedOut = errors.New("timed out waiting for function to finish")
 // Deadline implements the deadline/timeout resiliency pattern.
 type Deadline struct {
 	timeout time.Duration
+	action  string
 }
 
 // New constructs a new Deadline with the given timeout.
-func New(timeout time.Duration) *Deadline {
+func New(timeout time.Duration, sometile string) *Deadline {
 	return &Deadline{
 		timeout: timeout,
 	}
@@ -29,6 +38,7 @@ func New(timeout time.Duration) *Deadline {
 // the return value of the function is returned from Run.
 func (d *Deadline) Run(work func(<-chan struct{}) error) error {
 	result := make(chan error)
+
 	stopper := make(chan struct{})
 
 	go func() {
@@ -39,6 +49,8 @@ func (d *Deadline) Run(work func(<-chan struct{}) error) error {
 		}
 	}()
 
+	//handle result
+
 	select {
 	case ret := <-result:
 		return ret

resiliency/03_deadline/deadline_test.go

@@ -6,12 +6,12 @@ import (
 	"time"
 )
 
-func takesFiveMillis(stopper <-chan struct{}) error {
+func takes5ms(stopper <-chan struct{}) error {
 	time.Sleep(5 * time.Millisecond)
 	return nil
 }
 
-func takesTwentyMillis(stopper <-chan struct{}) error {
+func takes20ms(stopper <-chan struct{}) error {
 	time.Sleep(20 * time.Millisecond)
 	return nil
 }
@@ -20,14 +20,14 @@ func returnsError(stopper <-chan struct{}) error {
 	return errors.New("foo")
 }
 
-func TestDeadline(t *testing.T) {
+func TestMultiDeadline(t *testing.T) {
-	dl := New(10 * time.Millisecond)
+	dl := New(10*time.Millisecond, "test multi deadline case")
 
-	if err := dl.Run(takesFiveMillis); err != nil {
+	if err := dl.Run(takes5ms); err != nil {
 		t.Error(err)
 	}
 
-	if err := dl.Run(takesTwentyMillis); err != ErrTimedOut {
+	if err := dl.Run(takes20ms); err != ErrTimedOut {
 		t.Error(err)
 	}
 
@@ -47,19 +47,19 @@ func TestDeadline(t *testing.T) {
 	<-done
 }
 
-func ExampleDeadline() {
+func TestDeadline(t *testing.T) {
-	dl := New(1 * time.Second)
+	dl := New(1*time.Second, "one dead line case")
 
 	err := dl.Run(func(stopper <-chan struct{}) error {
-		// do something possibly slow
+		time.Sleep(time.Second * 10)
-		// check stopper function and give up if timed out
 		return nil
 	})
 
 	switch err {
 	case ErrTimedOut:
-		// execution took too long, oops
+		t.Error("execution took too long, oops")
 	default:
 		// some other error
+		t.Log("done")
 	}
 }