Initial commit

adapters/randomsource/service.go

@@ -0,0 +1,58 @@
+package randomsource
+
+import (
+	"context"
+	crand "crypto/rand"
+	"io"
+	"math/big"
+	"sync"
+	"time"
+)
+
+func NewService(ch chan [10]int, interval time.Duration, maxInt int64) *Service {
+	return &Service{
+		interval: interval,
+		ch:       ch,
+		rand:     crand.Reader,
+		maxInt:   maxInt,
+	}
+}
+
+type Service struct {
+	interval time.Duration
+	rand     io.Reader
+	ch       chan [10]int
+	maxInt   int64
+}
+
+func (s *Service) SourceCh() <-chan [10]int {
+	return s.ch
+}
+
+func (s *Service) Start(ctx context.Context, wg *sync.WaitGroup) {
+	defer wg.Done()
+
+	var res [10]int
+
+	ticker := time.NewTicker(s.interval)
+	defer ticker.Stop()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return
+
+		case <-ticker.C:
+			for i := 0; i < 10; i++ {
+				v, err := crand.Int(s.rand, big.NewInt(s.maxInt))
+				if err != nil {
+					panic(err)
+				}
+
+				res[i] = int(v.Int64())
+			}
+
+			s.ch <- res
+		}
+	}
+}