func example() {
var ctx context.Context
// [START deleting_tasks]
// Purge entire queue...
err := taskqueue.Purge(ctx, "queue1")
// Delete an individual task...
t := &taskqueue.Task{Name: "foo"}
err = taskqueue.Delete(ctx, t, "queue1")
// [END deleting_tasks]
_ = err
}
func (t tqImpl) Purge(queueName string) error {
return taskqueue.Purge(t.aeCtx, queueName)
}
func (t tqImpl) Purge(queueName string) error {
return taskqueue.Purge(t.Context, queueName)
}
func handlerGceManager(w http.ResponseWriter, r *http.Request) {
ctx := appengine.NewContext(r)
client := &http.Client{
Transport: &oauth2.Transport{
Source: google.AppEngineTokenSource(ctx, compute.ComputeScope),
Base: &urlfetch.Transport{Context: ctx},
},
}
s, err := compute.New(client)
if err != nil {
log.Errorf(ctx, "ERROR compute.New: %s", err)
w.WriteHeader(500)
return
}
is := compute.NewInstancesService(s)
ilc := is.List("cp300demo1", "us-central1-b")
il, err := ilc.Do()
if err != nil {
log.Errorf(ctx, "ERROR instances list: %s", err)
w.WriteHeader(500)
return
}
count := 0
for _, item := range il.Items {
log.Infof(ctx, "id = %s, name = %s, creationTimestamp = %s", item.Id, item.Name, item.CreationTimestamp)
if strings.HasPrefix(item.Name, INSTANCE_NAME) {
count++
}
}
threshold := 3
if count > threshold {
log.Infof(ctx, "Create a new instance is canceled.")
w.WriteHeader(200)
return
}
qs, err := taskqueue.QueueStats(ctx, []string{"pull-queue"})
if err != nil {
log.Errorf(ctx, "ERROR get queue stats: %s", err)
w.WriteHeader(500)
return
}
if qs[0].Tasks < 1 {
log.Infof(ctx, "gce-manager purge.")
err = taskqueue.Purge(ctx, "gce-manager")
if err != nil {
log.Warningf(ctx, "missing gce-manager purge. err = %s", err)
}
}
if count > qs[0].Tasks {
log.Infof(ctx, "instance count %d > task count %d", count, qs[0].Tasks)
w.WriteHeader(200)
return
}
threshold = math.MinInt32(threshold, qs[0].Tasks)
names := make([]string, 0)
for i := count; i < threshold; i++ {
name, err := createInstance(ctx, is)
if err != nil {
time.Sleep(3 * time.Second)
}
names = append(names, name)
}
w.WriteHeader(200)
fmt.Fprint(w, names)
}