[component] add LeveledMeterProvider (open-telemetry#10931)

This func will MeterProvider and MetricsLevel in the near future. Split
from
open-telemetry#10912

---------

Signed-off-by: Alex Boten <[email protected]>

.chloggen/codeboten_leveled-meter-split-2.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: component
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add `TelemetrySettings.LeveledMeterProvider` func to replace MetricsLevel in the near future"
+
+# One or more tracking issues or pull requests related to the change
+issues: [10931]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

component/telemetry.go

@@ -24,6 +24,10 @@ type TelemetrySettings struct {
 	// MeterProvider that the factory can pass to other instrumented third-party libraries.
 	MeterProvider metric.MeterProvider
 
+	// LeveledMeterProvider returns a MeterProvider for a Level that the factory can
+	// pass to other instrumented third-party libraries.
+	LeveledMeterProvider func(level configtelemetry.Level) metric.MeterProvider
+
 	// MetricsLevel controls the level of detail for metrics emitted by the collector.
 	// Experimental: *NOTE* this field is experimental and may be changed or removed.
 	MetricsLevel configtelemetry.Level

processor/processorhelper/obsreport_test.go

@@ -9,6 +9,8 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/otel/metric"
+	"go.opentelemetry.io/otel/metric/noop"
 
 	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/component/componenttest"
@@ -217,6 +219,9 @@ func TestNoMetrics(t *testing.T) {
 
 		set := tt.TelemetrySettings()
 		set.MetricsLevel = configtelemetry.LevelNone
+		set.LeveledMeterProvider = func(_ configtelemetry.Level) metric.MeterProvider {
+			return noop.MeterProvider{}
+		}
 
 		por, err := NewObsReport(ObsReportSettings{
 			ProcessorID:             processorID,
@@ -239,6 +244,9 @@ func TestNoMetrics(t *testing.T) {
 
 		set := tt.TelemetrySettings()
 		set.MetricsLevel = configtelemetry.LevelNone
+		set.LeveledMeterProvider = func(_ configtelemetry.Level) metric.MeterProvider {
+			return noop.MeterProvider{}
+		}
 
 		por, err := NewObsReport(ObsReportSettings{
 			ProcessorID:             processorID,
@@ -261,6 +269,9 @@ func TestNoMetrics(t *testing.T) {
 
 		set := tt.TelemetrySettings()
 		set.MetricsLevel = configtelemetry.LevelNone
+		set.LeveledMeterProvider = func(_ configtelemetry.Level) metric.MeterProvider {
+			return noop.MeterProvider{}
+		}
 
 		por, err := NewObsReport(ObsReportSettings{
 			ProcessorID:             processorID,

service/internal/proctelemetry/process_telemetry_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	otelprom "go.opentelemetry.io/otel/exporters/prometheus"
+	"go.opentelemetry.io/otel/metric"
 	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
 	"go.opentelemetry.io/otel/sdk/resource"
 
@@ -56,6 +57,10 @@ func setupTelemetry(t *testing.T) testTelemetry {
 	)
 	settings.TelemetrySettings.MeterProvider = settings.meterProvider
 
+	settings.TelemetrySettings.LeveledMeterProvider = func(_ configtelemetry.Level) metric.MeterProvider {
+		return settings.meterProvider
+	}
+
 	settings.promHandler = promhttp.HandlerFor(promReg, promhttp.HandlerOpts{})
 
 	t.Cleanup(func() { assert.NoError(t, settings.meterProvider.Shutdown(context.Background())) })

service/service.go

@@ -12,6 +12,7 @@ import (
 	"runtime"
 
 	"go.opentelemetry.io/otel/metric"
+	"go.opentelemetry.io/otel/metric/noop"
 	sdkresource "go.opentelemetry.io/otel/sdk/resource"
 	"go.uber.org/multierr"
 	"go.uber.org/zap"
@@ -127,6 +128,12 @@ func New(ctx context.Context, set Settings, cfg Config) (*Service, error) {
 
 	logsAboutMeterProvider(logger, cfg.Telemetry.Metrics, mp, extendedConfig)
 	srv.telemetrySettings = component.TelemetrySettings{
+		LeveledMeterProvider: func(level configtelemetry.Level) metric.MeterProvider {
+			if level <= cfg.Telemetry.Metrics.Level {
+				return mp
+			}
+			return noop.MeterProvider{}
+		},
 		Logger:         logger,
 		MeterProvider:  mp,
 		TracerProvider: tracerProvider,