Implement caching dns resolver

events/event_stream.go

@@ -9,13 +9,13 @@ import (
 	"github.com/OneOfOne/xxhash"
 )
 
-type eventStream struct {
+type EventStream struct {
 	ctx       context.Context
 	ctxCancel context.CancelFunc
 	chans     []chan mtglib.Event
 }
 
-func (e eventStream) Send(ctx context.Context, evt mtglib.Event) {
+func (e EventStream) Send(ctx context.Context, evt mtglib.Event) {
 	var chanNo uint32
 
 	if streamID := evt.StreamID(); streamID != "" {
@@ -31,17 +31,17 @@ func (e eventStream) Send(ctx context.Context, evt mtglib.Event) {
 	}
 }
 
-func (e eventStream) Shutdown() {
+func (e EventStream) Shutdown() {
 	e.ctxCancel()
 }
 
-func NewEventStream(observerFactories []ObserverFactory) mtglib.EventStream {
+func NewEventStream(observerFactories []ObserverFactory) EventStream {
 	if len(observerFactories) == 0 {
 		observerFactories = append(observerFactories, NewNoopObserver)
 	}
 
 	ctx, cancel := context.WithCancel(context.Background())
-	rv := eventStream{
+	rv := EventStream{
 		ctx:       ctx,
 		ctxCancel: cancel,
 		chans:     make([]chan mtglib.Event, runtime.NumCPU()),

events/event_stream_test.go

@@ -19,7 +19,7 @@ type EventStreamTestSuite struct {
 	ctxCancel     context.CancelFunc
 	observerMock1 *ObserverMock
 	observerMock2 *ObserverMock
-	stream        mtglib.EventStream
+	stream        events.EventStream
 }
 
 func (suite *EventStreamTestSuite) SetupTest() {

events/noop.go

@@ -9,7 +9,6 @@ import (
 type noop struct{}
 
 func (n noop) Send(ctx context.Context, evt mtglib.Event) {}
-func (n noop) Shutdown()                                  {}
 
 func NewNoopStream() mtglib.EventStream {
 	return noop{}

events/noop_test.go

@@ -70,8 +70,6 @@ func (suite *NoopTestSuite) TestStream() {
 			stream.Send(suite.ctx, value)
 		})
 	}
-
-	stream.Shutdown()
 }
 
 func (suite *NoopTestSuite) TestObserver() {