Move sync

util/sync/options.go

@@ -0,0 +1,44 @@
+package sync
+
+import (
+	"time"
+
+	"github.com/micro/go-micro/v2/store"
+)
+
+// Options represents Sync options
+type Options struct {
+	// Stores represents layers in the sync in ascending order. L0, L1, L2, etc
+	Stores []store.Store
+	// SyncInterval is the duration between syncs from L0 to L1
+	SyncInterval time.Duration
+	// SyncMultiplier is the multiplication factor between each store.
+	SyncMultiplier int64
+}
+
+// Option sets Sync Options
+type Option func(o *Options)
+
+// Stores sets the layers that make up the sync
+func Stores(stores ...store.Store) Option {
+	return func(o *Options) {
+		o.Stores = make([]store.Store, len(stores))
+		for i, s := range stores {
+			o.Stores[i] = s
+		}
+	}
+}
+
+// SyncInterval sets the duration between syncs from L0 to L1
+func SyncInterval(d time.Duration) Option {
+	return func(o *Options) {
+		o.SyncInterval = d
+	}
+}
+
+// SyncMultiplier sets the multiplication factor for time to wait each sync layer
+func SyncMultiplier(i int64) Option {
+	return func(o *Options) {
+		o.SyncMultiplier = i
+	}
+}