Initial commit

accumulator/accumulator.go

@@ -0,0 +1,40 @@
+package accumulator
+
+import (
+	"context"
+	"sync"
+	"sync/atomic"
+)
+
+func NewAccumulator(in <-chan [3]int) *Accumulator {
+	return &Accumulator{in: in}
+}
+
+type Accumulator struct {
+	in   <-chan [3]int
+	summ atomic.Int64
+}
+
+func (a *Accumulator) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+
+		case m, ok := <-a.in:
+			if !ok {
+				return
+			}
+
+			for _, value := range m {
+				a.summ.Add(int64(value))
+			}
+		}
+	}
+}
+
+func (a *Accumulator) Res() int64 {
+	return a.summ.Load()
+}