[chore] Use generics for exporterhelper Sender

exporter/exporterhelper/internal/base_exporter.go

@@ -32,7 +32,7 @@ var usePullingBasedExporterQueueBatcher = featuregate.GlobalRegistry().MustRegis
 	featuregate.WithRegisterDescription("if set to true, turns on the pulling-based exporter queue bathcer"),
 )
 
-type ObsrepSenderFactory = func(obsrep *ObsReport) RequestSender
+type ObsrepSenderFactory = func(obsrep *ObsReport) Sender[internal.Request]
 
 // Option apply changes to BaseExporter.
 type Option func(*BaseExporter) error
@@ -53,10 +53,10 @@ type BaseExporter struct {
 	// Chain of senders that the exporter helper applies before passing the data to the actual exporter.
 	// The data is handled by each sender in the respective order starting from the queueSender.
 	// Most of the senders are optional, and initialized with a no-op path-through sender.
-	BatchSender   RequestSender
-	QueueSender   RequestSender
-	ObsrepSender  RequestSender
-	RetrySender   RequestSender
+	BatchSender   Sender[internal.Request]
+	QueueSender   Sender[internal.Request]
+	ObsrepSender  Sender[internal.Request]
+	RetrySender   Sender[internal.Request]
 	TimeoutSender *TimeoutSender // TimeoutSender is always initialized.
 
 	ConsumerOptions []consumer.Option
@@ -73,10 +73,10 @@ func NewBaseExporter(set exporter.Settings, signal pipeline.Signal, osf ObsrepSe
 	}
 
 	be := &BaseExporter{
-		BatchSender:   &BaseRequestSender{},
-		QueueSender:   &BaseRequestSender{},
+		BatchSender:   &BaseSender[internal.Request]{},
+		QueueSender:   &BaseSender[internal.Request]{},
 		ObsrepSender:  osf(obsReport),
-		RetrySender:   &BaseRequestSender{},
+		RetrySender:   &BaseSender[internal.Request]{},
 		TimeoutSender: &TimeoutSender{cfg: NewDefaultTimeoutConfig()},
 
 		Set:    set,

exporter/exporterhelper/internal/base_exporter_test.go

@@ -33,8 +33,8 @@ var (
 	}()
 )
 
-func newNoopObsrepSender(*ObsReport) RequestSender {
-	return &BaseRequestSender{}
+func newNoopObsrepSender(*ObsReport) Sender[internal.Request] {
+	return &BaseSender[internal.Request]{}
 }
 
 func TestBaseExporter(t *testing.T) {

exporter/exporterhelper/internal/batch_sender.go

@@ -23,7 +23,7 @@ import (
 // - cfg.FlushTimeout is elapsed since the timestamp when the previous batch was sent out.
 // - concurrencyLimit is reached.
 type BatchSender struct {
-	BaseRequestSender
+	BaseSender[internal.Request]
 	cfg exporterbatcher.Config
 
 	// concurrencyLimit is the maximum number of goroutines that can be blocked by the batcher.

exporter/exporterhelper/internal/queue_sender.go

@@ -67,7 +67,7 @@ func (qCfg *QueueConfig) Validate() error {
 }
 
 type QueueSender struct {
-	BaseRequestSender
+	BaseSender[internal.Request]
 	queue          exporterqueue.Queue[internal.Request]
 	numConsumers   int
 	traceAttribute attribute.KeyValue

exporter/exporterhelper/internal/request_sender.go

@@ -4,30 +4,30 @@
 package internal // import "go.opentelemetry.io/collector/exporter/exporterhelper/internal"
 
 import (
-	"context" // RequestSender is an abstraction of a sender for a request independent of the type of the data (traces, metrics, logs).
+	"context" // Sender is an abstraction of a sender for a request independent of the type of the data (traces, metrics, logs).
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/exporter/internal"
 )
 
-type RequestSender interface {
+type Sender[K any] interface {
 	component.Component
-	Send(context.Context, internal.Request) error
-	SetNextSender(nextSender RequestSender)
+	Send(context.Context, K) error
+	SetNextSender(nextSender Sender[K])
 }
 
-type BaseRequestSender struct {
+type BaseSender[K any] struct {
 	component.StartFunc
 	component.ShutdownFunc
-	NextSender RequestSender
+	NextSender Sender[K]
 }
 
-var _ RequestSender = (*BaseRequestSender)(nil)
+var _ Sender[internal.Request] = (*BaseSender[internal.Request])(nil)
 
-func (b *BaseRequestSender) Send(ctx context.Context, req internal.Request) error {
+func (b *BaseSender[K]) Send(ctx context.Context, req K) error {
 	return b.NextSender.Send(ctx, req)
 }
 
-func (b *BaseRequestSender) SetNextSender(nextSender RequestSender) {
+func (b *BaseSender[K]) SetNextSender(nextSender Sender[K]) {
 	b.NextSender = nextSender
 }

exporter/exporterhelper/internal/retry_sender.go

@@ -44,7 +44,7 @@ func NewThrottleRetry(err error, delay time.Duration) error {
 }
 
 type retrySender struct {
-	BaseRequestSender
+	BaseSender[internal.Request]
 	traceAttribute attribute.KeyValue
 	cfg            configretry.BackOffConfig
 	stopCh         chan struct{}
@@ -65,7 +65,7 @@ func (rs *retrySender) Shutdown(context.Context) error {
 	return nil
 }
 
-// send implements the requestSender interface
+// Send implements the requestSender interface
 func (rs *retrySender) Send(ctx context.Context, req internal.Request) error {
 	// Do not use NewExponentialBackOff since it calls Reset and the code here must
 	// call Reset after changing the InitialInterval (this saves an unnecessary call to Now).

exporter/exporterhelper/internal/retry_sender_test.go

@@ -477,13 +477,13 @@ func newMockRequest(cnt int, consumeError error) *mockRequest {
 }
 
 type observabilityConsumerSender struct {
-	BaseRequestSender
+	BaseSender[internal.Request]
 	waitGroup         *sync.WaitGroup
 	sentItemsCount    *atomic.Int64
 	droppedItemsCount *atomic.Int64
 }
 
-func newObservabilityConsumerSender(*ObsReport) RequestSender {
+func newObservabilityConsumerSender(*ObsReport) Sender[internal.Request] {
 	return &observabilityConsumerSender{
 		waitGroup:         new(sync.WaitGroup),
 		droppedItemsCount: &atomic.Int64{},

exporter/exporterhelper/internal/timeout_sender.go

@@ -35,7 +35,7 @@ func NewDefaultTimeoutConfig() TimeoutConfig {
 
 // TimeoutSender is a requestSender that adds a `timeout` to every request that passes this sender.
 type TimeoutSender struct {
-	BaseRequestSender
+	BaseSender[internal.Request]
 	cfg TimeoutConfig
 }
 

exporter/exporterhelper/logs.go

@@ -104,7 +104,7 @@ func requestFromLogs(pusher consumer.ConsumeLogsFunc) RequestFromLogsFunc {
 	}
 }
 
-// NewLogsRequest creates new logs exporter based on custom LogsConverter and RequestSender.
+// NewLogsRequest creates new logs exporter based on custom LogsConverter and Sender.
 // Experimental: This API is at the early stage of development and may change without backward compatibility
 // until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
 func NewLogsRequest(
@@ -148,11 +148,11 @@ func NewLogsRequest(
 }
 
 type logsExporterWithObservability struct {
-	internal.BaseRequestSender
+	internal.BaseSender[Request]
 	obsrep *internal.ObsReport
 }
 
-func newLogsWithObservability(obsrep *internal.ObsReport) internal.RequestSender {
+func newLogsWithObservability(obsrep *internal.ObsReport) internal.Sender[Request] {
 	return &logsExporterWithObservability{obsrep: obsrep}
 }
 

exporter/exporterhelper/metrics.go

@@ -104,7 +104,7 @@ func requestFromMetrics(pusher consumer.ConsumeMetricsFunc) RequestFromMetricsFu
 	}
 }
 
-// NewMetricsRequest creates a new metrics exporter based on a custom MetricsConverter and RequestSender.
+// NewMetricsRequest creates a new metrics exporter based on a custom MetricsConverter and Sender.
 // Experimental: This API is at the early stage of development and may change without backward compatibility
 // until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
 func NewMetricsRequest(
@@ -148,11 +148,11 @@ func NewMetricsRequest(
 }
 
 type metricsSenderWithObservability struct {
-	internal.BaseRequestSender
+	internal.BaseSender[Request]
 	obsrep *internal.ObsReport
 }
 
-func newMetricsSenderWithObservability(obsrep *internal.ObsReport) internal.RequestSender {
+func newMetricsSenderWithObservability(obsrep *internal.ObsReport) internal.Sender[Request] {
 	return &metricsSenderWithObservability{obsrep: obsrep}
 }
 

exporter/exporterhelper/traces.go

@@ -104,7 +104,7 @@ func requestFromTraces(pusher consumer.ConsumeTracesFunc) RequestFromTracesFunc
 	}
 }
 
-// NewTracesRequest creates a new traces exporter based on a custom TracesConverter and RequestSender.
+// NewTracesRequest creates a new traces exporter based on a custom TracesConverter and Sender.
 // Experimental: This API is at the early stage of development and may change without backward compatibility
 // until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
 func NewTracesRequest(
@@ -148,11 +148,11 @@ func NewTracesRequest(
 }
 
 type tracesWithObservability struct {
-	internal.BaseRequestSender
+	internal.BaseSender[Request]
 	obsrep *internal.ObsReport
 }
 
-func newTracesWithObservability(obsrep *internal.ObsReport) internal.RequestSender {
+func newTracesWithObservability(obsrep *internal.ObsReport) internal.Sender[Request] {
 	return &tracesWithObservability{obsrep: obsrep}
 }
 

exporter/exporterhelper/xexporterhelper/profiles.go

@@ -106,7 +106,7 @@ func requestFromProfiles(pusher xconsumer.ConsumeProfilesFunc) RequestFromProfil
 	}
 }
 
-// NewProfilesRequestExporter creates a new profiles exporter based on a custom ProfilesConverter and RequestSender.
+// NewProfilesRequestExporter creates a new profiles exporter based on a custom ProfilesConverter and Sender.
 // Experimental: This API is at the early stage of development and may change without backward compatibility
 // until https://github.com/open-telemetry/opentelemetry-collector/issues/8122 is resolved.
 func NewProfilesRequestExporter(
@@ -146,11 +146,11 @@ func NewProfilesRequestExporter(
 }
 
 type profilesExporterWithObservability struct {
-	internal.BaseRequestSender
+	internal.BaseSender[exporterhelper.Request]
 	obsrep *internal.ObsReport
 }
 
-func newProfilesExporterWithObservability(obsrep *internal.ObsReport) internal.RequestSender {
+func newProfilesExporterWithObservability(obsrep *internal.ObsReport) internal.Sender[exporterhelper.Request] {
 	return &profilesExporterWithObservability{obsrep: obsrep}
 }