first commit

worker/worker.go

@@ -0,0 +1,32 @@
+package worker
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+// ProsesSertifikasi simulates certification processing for a single user.
+func ProsesSertifikasi(userID int) string {
+	// simulate variable work (sleep)
+	time.Sleep(time.Millisecond * time.Duration(50+userID%10*20))
+	return fmt.Sprintf("user-%d: done", userID)
+}
+
+// RunSertifikasi starts n goroutines and waits for all to finish.
+// Returns results in a slice.
+func RunSertifikasi(n int) []string {
+	var wg sync.WaitGroup
+	wg.Add(n)
+
+	results := make([]string, n)
+	for i := 0; i < n; i++ {
+		i := i // capture
+		go func() {
+			defer wg.Done()
+			results[i] = ProsesSertifikasi(i + 1)
+		}()
+	}
+	wg.Wait()
+	return results
+}