Messaging service, adapters, refactoring

pkg/discovery/discoveryset.go

@@ -0,0 +1,34 @@
+package discovery
+
+// DiscoverySet a slice of initialized discovery services.
+//
+//goland:noinspection GoNameStartsWithPackageName
+type DiscoverySet []*Discovery
+
+// NewNodes returns channel with newly discovered node ips.
+func (d DiscoverySet) NewNodes() NewNodes {
+	res := make(chan string, 20)
+
+	for _, discovery := range d {
+		go func(discovery *Discovery) {
+			for node := range discovery.NewNodes() {
+				if len(res) == cap(res) {
+					panic("knownNodes from discovery set not reading!")
+				}
+
+				res <- node
+			}
+		}(discovery)
+	}
+
+	return res
+}
+
+// FailNodes accept a channel with ip of nodes, that was failed (lost or canceled connection).
+func (d DiscoverySet) FailNodes(ch chan string) {
+	for addr := range ch {
+		for _, discovery := range d {
+			discovery.FailNode(addr)
+		}
+	}
+}