func addTaskHandler(w http.ResponseWriter, r *http.Request) {
ctx := appengine.NewContext(r)
// [START adding_tasks_to_a_pull_queue]
t := &taskqueue.Task{
Payload: []byte("hello world"),
Method: "PULL",
}
_, err := taskqueue.Add(ctx, t, "pull-queue")
// [END adding_tasks_to_a_pull_queue]
_ = err
// [START leasing_tasks_1]
tasks, err := taskqueue.Lease(ctx, 100, "pull-queue", 3600)
// [END leasing_tasks_1]
// [START leasing_tasks_2]
_, err = taskqueue.Add(ctx, &taskqueue.Task{
Payload: []byte("parse"), Method: "PULL", Tag: "parse",
}, "pull-queue")
_, err = taskqueue.Add(ctx, &taskqueue.Task{
Payload: []byte("render"), Method: "PULL", Tag: "render",
}, "pull-queue")
// leases render tasks, but not parse
tasks, err = taskqueue.LeaseByTag(ctx, 100, "pull-queue", 3600, "render")
// Leases up to 100 tasks that have same tag.
// Tag is that of "oldest" task by ETA.
tasks, err = taskqueue.LeaseByTag(ctx, 100, "pull-queue", 3600, "")
// [END leasing_tasks_2]
// [START deleting_tasks_1]
tasks, err = taskqueue.Lease(ctx, 100, "pull-queue", 3600)
// Perform some work with the tasks here
taskqueue.DeleteMulti(ctx, tasks, "pull-queue")
// [END deleting_tasks_1]
}
// Checks the task queue every half-hour
func poller(ctx context.Context) {
for true {
tasks, err := taskqueue.Lease(ctx, 1, "reminders", 3600)
if err != nil {
// not sure what to do with errors
} else {
if len(tasks) > 0 {
sendOneReminder(ctx, tasks[0])
}
}
time.Sleep(time.Minute * 30)
}
}