first

course/13-channels/exercises/8-select_default/complete.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"time"
+)
+
+func saveBackups(snapshotTicker, saveAfter <-chan time.Time) {
+	for {
+		select {
+		case <-snapshotTicker:
+			takeSnapshot()
+		case <-saveAfter:
+			saveSnapshot()
+			return
+		default:
+			waitForData()
+			time.Sleep(500 * time.Millisecond)
+		}
+	}
+}
+
+// TEST SUITE - Don't touch below this line
+
+func takeSnapshot() {
+	fmt.Println("Taking a backup snapshot...")
+}
+
+func saveSnapshot() {
+	fmt.Println("All backups saved!")
+}
+
+func waitForData() {
+	fmt.Println("Nothing to do, waiting...")
+}
+
+func test() {
+	snapshotTicker := time.Tick(800 * time.Millisecond)
+	saveAfter := time.After(2800 * time.Millisecond)
+	saveBackups(snapshotTicker, saveAfter)
+	fmt.Println("===========================")
+}
+
+func main() {
+	test()
+}