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app/admin/main/up/util/timerqueue/example_test.go

@@ -0,0 +1,44 @@
+package timerqueue_test
+
+import (
+	"fmt"
+	"time"
+
+	"go-common/app/admin/main/up/util/timerqueue"
+)
+
+type event int
+
+func (e event) OnTimer(t time.Time) {
+	fmt.Printf("  Event %d executed at %v\n", int(e), t)
+}
+
+// Schedule several events with a timerqueue, and dispatch
+// them by calling Advance.
+func ExampleQueue() {
+	queue := timerqueue.New()
+
+	// Schedule an event each day from Jan 1 to Jan 7, 2015.
+	tm := time.Date(2015, 1, 1, 0, 0, 0, 0, time.UTC)
+	for i := 1; i <= 7; i++ {
+		queue.Schedule(event(i), tm)
+		tm = tm.Add(24 * time.Hour)
+	}
+
+	fmt.Println("Advancing to Jan 4...")
+	queue.Advance(time.Date(2015, 1, 4, 0, 0, 0, 0, time.UTC))
+
+	fmt.Println("Advancing to Jan 10...")
+	queue.Advance(time.Date(2015, 1, 10, 0, 0, 0, 0, time.UTC))
+
+	// Output:
+	// Advancing to Jan 4...
+	//   Event 1 executed at 2015-01-01 00:00:00 +0000 UTC
+	//   Event 2 executed at 2015-01-02 00:00:00 +0000 UTC
+	//   Event 3 executed at 2015-01-03 00:00:00 +0000 UTC
+	//   Event 4 executed at 2015-01-04 00:00:00 +0000 UTC
+	// Advancing to Jan 10...
+	//   Event 5 executed at 2015-01-05 00:00:00 +0000 UTC
+	//   Event 6 executed at 2015-01-06 00:00:00 +0000 UTC
+	//   Event 7 executed at 2015-01-07 00:00:00 +0000 UTC
+}