Move extensions for internal to public package

Updates open-telemetry#5564

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

service/extensions/config.go

@@ -0,0 +1,22 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//       http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package extensions // import "go.opentelemetry.io/collector/service/extensions"
+
+import (
+	"go.opentelemetry.io/collector/config"
+)
+
+// Config represents the ordered list of extensions configured for the service.
+type Config []config.ComponentID

service/internal/extensions/extensions.go → service/extensions/extensions.go

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package extensions // import "go.opentelemetry.io/collector/service/internal/extensions"
+package extensions // import "go.opentelemetry.io/collector/service/extensions"
 
 import (
 	"context"
@@ -37,8 +37,8 @@ type Extensions struct {
 	extMap    map[config.ComponentID]component.Extension
 }
 
-// StartAll starts all extensions.
-func (bes *Extensions) StartAll(ctx context.Context, host component.Host) error {
+// Start starts all extensions.
+func (bes *Extensions) Start(ctx context.Context, host component.Host) error {
 	bes.telemetry.Logger.Info("Starting extensions...")
 	for extID, ext := range bes.extMap {
 		extLogger := extensionLogger(bes.telemetry.Logger, extID)
@@ -51,8 +51,8 @@ func (bes *Extensions) StartAll(ctx context.Context, host component.Host) error
 	return nil
 }
 
-// ShutdownAll stops all extensions.
-func (bes *Extensions) ShutdownAll(ctx context.Context) error {
+// Shutdown stops all extensions.
+func (bes *Extensions) Shutdown(ctx context.Context) error {
 	bes.telemetry.Logger.Info("Stopping extensions...")
 	var errs error
 	for _, ext := range bes.extMap {
@@ -128,18 +128,15 @@ type Settings struct {
 
 	// Factories maps extension type names in the config to the respective component.ExtensionFactory.
 	Factories map[config.Type]component.ExtensionFactory
-
-	// ServiceExtensions are the ordered list of extensions configured for the service.
-	ServiceExtensions []config.ComponentID
 }
 
-// Build builds Extensions from config.
-func Build(ctx context.Context, set Settings) (*Extensions, error) {
+// New creates a new Extensions from Config.
+func New(ctx context.Context, set Settings, cfg Config) (*Extensions, error) {
 	exts := &Extensions{
 		telemetry: set.Telemetry,
 		extMap:    make(map[config.ComponentID]component.Extension),
 	}
-	for _, extID := range set.ServiceExtensions {
+	for _, extID := range cfg {
 		extCfg, existsCfg := set.Configs[extID]
 		if !existsCfg {
 			return nil, fmt.Errorf("extension %q is not configured", extID)

service/internal/extensions/extensions_test.go → service/extensions/extensions_test.go

@@ -93,13 +93,12 @@ func TestBuildExtensions(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			_, err := Build(context.Background(), Settings{
-				Telemetry:         componenttest.NewNopTelemetrySettings(),
-				BuildInfo:         component.NewDefaultBuildInfo(),
-				Configs:           tt.extensionsConfigs,
-				Factories:         tt.factories.Extensions,
-				ServiceExtensions: tt.serviceExtensions,
-			})
+			_, err := New(context.Background(), Settings{
+				Telemetry: componenttest.NewNopTelemetrySettings(),
+				BuildInfo: component.NewDefaultBuildInfo(),
+				Configs:   tt.extensionsConfigs,
+				Factories: tt.factories.Extensions,
+			}, tt.serviceExtensions)
 			require.Error(t, err)
 			assert.EqualError(t, err, tt.wantErrMsg)
 		})

service/host.go

@@ -17,7 +17,7 @@ package service // import "go.opentelemetry.io/collector/service"
 import (
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/config"
-	"go.opentelemetry.io/collector/service/internal/extensions"
+	"go.opentelemetry.io/collector/service/extensions"
 	"go.opentelemetry.io/collector/service/internal/pipelines"
 )
 

service/service.go

@@ -25,8 +25,8 @@ import (
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/config/configtelemetry"
+	"go.opentelemetry.io/collector/service/extensions"
 	"go.opentelemetry.io/collector/service/internal"
-	"go.opentelemetry.io/collector/service/internal/extensions"
 	"go.opentelemetry.io/collector/service/internal/pipelines"
 	"go.opentelemetry.io/collector/service/internal/telemetry"
 	"go.opentelemetry.io/collector/service/internal/telemetrylogs"
@@ -73,13 +73,12 @@ func newService(set *settings) (*service, error) {
 	srv.telemetrySettings.MeterProvider = srv.telemetryInitializer.mp
 
 	extensionsSettings := extensions.Settings{
-		Telemetry:         srv.telemetrySettings,
-		BuildInfo:         srv.buildInfo,
-		Configs:           srv.config.Extensions,
-		Factories:         srv.host.factories.Extensions,
-		ServiceExtensions: srv.config.Service.Extensions,
+		Telemetry: srv.telemetrySettings,
+		BuildInfo: srv.buildInfo,
+		Configs:   srv.config.Extensions,
+		Factories: srv.host.factories.Extensions,
 	}
-	if srv.host.extensions, err = extensions.Build(context.Background(), extensionsSettings); err != nil {
+	if srv.host.extensions, err = extensions.New(context.Background(), extensionsSettings, srv.config.Service.Extensions); err != nil {
 		return nil, fmt.Errorf("failed build extensions: %w", err)
 	}
 
@@ -109,7 +108,7 @@ func newService(set *settings) (*service, error) {
 }
 
 func (srv *service) Start(ctx context.Context) error {
-	if err := srv.host.extensions.StartAll(ctx, srv.host); err != nil {
+	if err := srv.host.extensions.Start(ctx, srv.host); err != nil {
 		return fmt.Errorf("failed to start extensions: %w", err)
 	}
 
@@ -132,7 +131,7 @@ func (srv *service) Shutdown(ctx context.Context) error {
 		errs = multierr.Append(errs, fmt.Errorf("failed to shutdown pipelines: %w", err))
 	}
 
-	if err := srv.host.extensions.ShutdownAll(ctx); err != nil {
+	if err := srv.host.extensions.Shutdown(ctx); err != nil {
 		errs = multierr.Append(errs, fmt.Errorf("failed to shutdown extensions: %w", err))
 	}