Feature: Generate function and extension logs via Telemetry API receiver

collector/internal/lifecycle/manager.go

@@ -75,7 +75,7 @@ func NewManager(ctx context.Context, logger *zap.Logger, version string) (contex
 	}
 
 	telemetryClient := telemetryapi.NewClient(logger)
-	_, err = telemetryClient.Subscribe(ctx, res.ExtensionID, addr)
+	_, err = telemetryClient.Subscribe(ctx, []telemetryapi.EventType{telemetryapi.Platform}, res.ExtensionID, addr)
 	if err != nil {
 		logger.Fatal("Cannot register Telemetry API client", zap.Error(err))
 	}

collector/internal/telemetryapi/client.go

@@ -46,13 +46,7 @@ func NewClient(logger *zap.Logger) *Client {
 	}
 }
 
-func (c *Client) Subscribe(ctx context.Context, extensionID string, listenerURI string) (string, error) {
-	eventTypes := []EventType{
-		Platform,
-		// Function,
-		// Extension,
-	}
-
+func (c *Client) Subscribe(ctx context.Context, eventTypes []EventType, extensionID string, listenerURI string) (string, error) {
 	bufferingConfig := BufferingCfg{
 		MaxItems:  1000,
 		MaxBytes:  256 * 1024,

collector/receiver/telemetryapireceiver/README.md

@@ -1,10 +1,10 @@
 # Telemetry API Receiver
 
-| Status                   |                 |
-| ------------------------ |-----------------|
-| Stability                | [alpha]         |
-| Supported pipeline types | traces          |
-| Distributions            | [extension]     |
+| Status                   |              |
+| ------------------------ |--------------|
+| Stability                | [alpha]      |
+| Supported pipeline types | traces, logs |
+| Distributions            | [extension]  |
 
 This receiver generates telemetry in response to events from the [Telemetry API](https://docs.aws.amazon.com/lambda/latest/dg/telemetry-api.html). It does this by setting up an endpoint and registering itself with the Telemetry API on startup.
 

collector/receiver/telemetryapireceiver/factory.go

@@ -18,6 +18,7 @@ import (
 	"context"
 	"errors"
 
+	"github.com/open-telemetry/opentelemetry-lambda/collector/receiver/telemetryapireceiver/internal/sharedcomponent"
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/consumer"
 	"go.opentelemetry.io/collector/receiver"
@@ -39,14 +40,32 @@ func NewFactory(extensionID string) receiver.Factory {
 				extensionID: extensionID,
 			}
 		},
-		receiver.WithTraces(createTracesReceiver, stability))
+		receiver.WithTraces(createTracesReceiver, stability),
+		receiver.WithLogs(createLogsReceiver, stability))
 }
 
 func createTracesReceiver(ctx context.Context, params receiver.CreateSettings, rConf component.Config, next consumer.Traces) (receiver.Traces, error) {
 	cfg, ok := rConf.(*Config)
 	if !ok {
 		return nil, errConfigNotTelemetryAPI
 	}
+	r := receivers.GetOrAdd(cfg, func() component.Component {
+		return newTelemetryAPIReceiver(cfg, params)
+	})
+	r.Unwrap().(*telemetryAPIReceiver).registerTracesConsumer(next)
+	return r, nil
+}
 
-	return newTelemetryAPIReceiver(cfg, next, params)
+func createLogsReceiver(ctx context.Context, params receiver.CreateSettings, rConf component.Config, next consumer.Logs) (receiver.Logs, error) {
+	cfg, ok := rConf.(*Config)
+	if !ok {
+		return nil, errConfigNotTelemetryAPI
+	}
+	r := receivers.GetOrAdd(cfg, func() component.Component {
+		return newTelemetryAPIReceiver(cfg, params)
+	})
+	r.Unwrap().(*telemetryAPIReceiver).registerLogsConsumer(next)
+	return r, nil
 }
+
+var receivers = sharedcomponent.NewSharedComponents()

collector/receiver/telemetryapireceiver/internal/sharedcomponent/sharedcomponent.go

@@ -0,0 +1,76 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+// Package sharedcomponent exposes util functionality for receivers and exporters
+// that need to share state between different signal types instances such as net.Listener or os.File.
+package sharedcomponent // import "github.com/open-telemetry/opentelemetry-lambda/collector/receiver/telemetryapireceiver/internal/sharedcomponent"
+
+import (
+	"context"
+	"sync"
+
+	"go.opentelemetry.io/collector/component"
+)
+
+// SharedComponents a map that keeps reference of all created instances for a given configuration,
+// and ensures that the shared state is started and stopped only once.
+type SharedComponents struct {
+	comps map[any]*SharedComponent
+}
+
+// NewSharedComponents returns a new empty SharedComponents.
+func NewSharedComponents() *SharedComponents {
+	return &SharedComponents{
+		comps: make(map[any]*SharedComponent),
+	}
+}
+
+// GetOrAdd returns the already created instance if exists, otherwise creates a new instance
+// and adds it to the map of references.
+func (scs *SharedComponents) GetOrAdd(key any, create func() component.Component) *SharedComponent {
+	if c, ok := scs.comps[key]; ok {
+		return c
+	}
+	newComp := &SharedComponent{
+		Component: create(),
+		removeFunc: func() {
+			delete(scs.comps, key)
+		},
+	}
+	scs.comps[key] = newComp
+	return newComp
+}
+
+// SharedComponent ensures that the wrapped component is started and stopped only once.
+// When stopped it is removed from the SharedComponents map.
+type SharedComponent struct {
+	component.Component
+
+	startOnce  sync.Once
+	stopOnce   sync.Once
+	removeFunc func()
+}
+
+// Unwrap returns the original component.
+func (r *SharedComponent) Unwrap() component.Component {
+	return r.Component
+}
+
+// Start implements component.Component.
+func (r *SharedComponent) Start(ctx context.Context, host component.Host) error {
+	var err error
+	r.startOnce.Do(func() {
+		err = r.Component.Start(ctx, host)
+	})
+	return err
+}
+
+// Shutdown implements component.Component.
+func (r *SharedComponent) Shutdown(ctx context.Context) error {
+	var err error
+	r.stopOnce.Do(func() {
+		err = r.Component.Shutdown(ctx)
+		r.removeFunc()
+	})
+	return err
+}

collector/receiver/telemetryapireceiver/internal/sharedcomponent/sharedcomponent_test.go

@@ -0,0 +1,72 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package sharedcomponent
+
+import (
+	"context"
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/component/componenttest"
+)
+
+var id = component.MustNewID("test")
+
+func TestNewSharedComponents(t *testing.T) {
+	comps := NewSharedComponents()
+	assert.Len(t, comps.comps, 0)
+}
+
+type mockComponent struct {
+	component.StartFunc
+	component.ShutdownFunc
+}
+
+func TestSharedComponents_GetOrAdd(t *testing.T) {
+	nop := &mockComponent{}
+	createNop := func() component.Component { return nop }
+
+	comps := NewSharedComponents()
+	got := comps.GetOrAdd(id, createNop)
+	assert.Len(t, comps.comps, 1)
+	assert.Same(t, nop, got.Unwrap())
+	assert.Same(t, got, comps.GetOrAdd(id, createNop))
+
+	// Shutdown nop will remove
+	assert.NoError(t, got.Shutdown(context.Background()))
+	assert.Len(t, comps.comps, 0)
+	assert.NotSame(t, got, comps.GetOrAdd(id, createNop))
+}
+
+func TestSharedComponent(t *testing.T) {
+	wantErr := errors.New("my error")
+	calledStart := 0
+	calledStop := 0
+	comp := &mockComponent{
+		StartFunc: func(_ context.Context, _ component.Host) error {
+			calledStart++
+			return wantErr
+		},
+		ShutdownFunc: func(_ context.Context) error {
+			calledStop++
+			return wantErr
+		},
+	}
+	createComp := func() component.Component { return comp }
+
+	comps := NewSharedComponents()
+	got := comps.GetOrAdd(id, createComp)
+	assert.Equal(t, wantErr, got.Start(context.Background(), componenttest.NewNopHost()))
+	assert.Equal(t, 1, calledStart)
+	// Second time is not called anymore.
+	assert.NoError(t, got.Start(context.Background(), componenttest.NewNopHost()))
+	assert.Equal(t, 1, calledStart)
+	assert.Equal(t, wantErr, got.Shutdown(context.Background()))
+	assert.Equal(t, 1, calledStop)
+	// Second time is not called anymore.
+	assert.NoError(t, got.Shutdown(context.Background()))
+	assert.Equal(t, 1, calledStop)
+}