feat(otlp-transformer): consolidate scope/resource creation in transformer

experimental/CHANGELOG.md

@@ -8,6 +8,8 @@ All notable changes to experimental packages in this project will be documented
 
 ### :rocket: (Enhancement)
 
+* feat(otlp-transformer): consolidate scope/resource creation in transformer [#4600](https://github.com/open-telemetry/opentelemetry-js/pull/4600)
+
 ### :bug: (Bug Fix)
 
 ### :books: (Refine Doc)
@@ -31,9 +33,6 @@ All notable changes to experimental packages in this project will be documented
       * was used internally to keep track of the service client used by the exporter, as a side effect it allowed end-users to modify the gRPC service client that was used
     * `compression`
       * was used internally to keep track of the compression to use but was unintentionally exposed to the users. It allowed to read and write the value, writing, however, would have no effect.
-* feat(api-events)!: removed domain from the Events API [#4569](https://github.com/open-telemetry/opentelemetry-js/pull/4569) @martinkuba
-* fix(api-events)!: renamed EventEmitter to EventLogger in the Events API [#4569](https://github.com/open-telemetry/opentelemetry-js/pull/4568) @martinkuba
-* feat(api-logs)!: changed LogRecord body data type to AnyValue and AnyValueMap types [#4575](https://github.com/open-telemetry/opentelemetry-js/pull/4575) @martinkuba
 
 ### :rocket: (Enhancement)
 

experimental/packages/otlp-transformer/src/common/internal.ts

@@ -13,8 +13,18 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import type { IAnyValue, IKeyValue } from './types';
+import type { IAnyValue, IInstrumentationScope, IKeyValue } from './types';
 import { Attributes } from '@opentelemetry/api';
+import { InstrumentationScope } from '@opentelemetry/core';
+
+export function createInstrumentationScope(
+  scope: InstrumentationScope
+): IInstrumentationScope {
+  return {
+    name: scope.name,
+    version: scope.version,
+  };
+}
 
 export function toAttributes(attributes: Attributes): IKeyValue[] {
   return Object.keys(attributes).map(key => toKeyValue(key, attributes[key]));

experimental/packages/otlp-transformer/src/logs/index.ts

@@ -23,10 +23,15 @@ import {
 } from './types';
 import { IResource } from '@opentelemetry/resources';
 import { Encoder, getOtlpEncoder } from '../common';
-import { toAnyValue, toAttributes, toKeyValue } from '../common/internal';
+import {
+  createInstrumentationScope,
+  toAnyValue,
+  toKeyValue,
+} from '../common/internal';
 import { SeverityNumber } from '@opentelemetry/api-logs';
 import { OtlpEncodingOptions, IKeyValue } from '../common/types';
 import { LogAttributes } from '@opentelemetry/api-logs';
+import { createResource } from '../resource/internal';
 
 export function createExportLogsServiceRequest(
   logRecords: ReadableLogRecord[],
@@ -75,18 +80,12 @@ function logRecordsToResourceLogs(
 ): IResourceLogs[] {
   const resourceMap = createResourceMap(logRecords);
   return Array.from(resourceMap, ([resource, ismMap]) => ({
-    resource: {
-      attributes: toAttributes(resource.attributes),
-      droppedAttributesCount: 0,
-    },
+    resource: createResource(resource),
     scopeLogs: Array.from(ismMap, ([, scopeLogs]) => {
-      const {
-        instrumentationScope: { name, version, schemaUrl },
-      } = scopeLogs[0];
       return {
-        scope: { name, version },
+        scope: createInstrumentationScope(scopeLogs[0].instrumentationScope),
         logRecords: scopeLogs.map(log => toLogRecord(log, encoder)),
-        schemaUrl,
+        schemaUrl: scopeLogs[0].instrumentationScope.schemaUrl,
       };
     }),
     schemaUrl: undefined,

experimental/packages/otlp-transformer/src/metrics/internal.ts

@@ -25,7 +25,6 @@ import {
   ResourceMetrics,
   ScopeMetrics,
 } from '@opentelemetry/sdk-metrics';
-import { toAttributes } from '../common/internal';
 import {
   EAggregationTemporality,
   IExponentialHistogramDataPoint,
@@ -36,17 +35,16 @@ import {
   IScopeMetrics,
 } from './types';
 import { Encoder, getOtlpEncoder } from '../common';
+import { createInstrumentationScope, toAttributes } from '../common/internal';
+import { createResource } from '../resource/internal';
 
 export function toResourceMetrics(
   resourceMetrics: ResourceMetrics,
   options?: OtlpEncodingOptions
 ): IResourceMetrics {
   const encoder = getOtlpEncoder(options);
   return {
-    resource: {
-      attributes: toAttributes(resourceMetrics.resource.attributes),
-      droppedAttributesCount: 0,
-    },
+    resource: createResource(resourceMetrics.resource),
     schemaUrl: undefined,
     scopeMetrics: toScopeMetrics(resourceMetrics.scopeMetrics, encoder),
   };
@@ -58,10 +56,7 @@ export function toScopeMetrics(
 ): IScopeMetrics[] {
   return Array.from(
     scopeMetrics.map(metrics => ({
-      scope: {
-        name: metrics.scope.name,
-        version: metrics.scope.version,
-      },
+      scope: createInstrumentationScope(metrics.scope),
       metrics: metrics.metrics.map(metricData => toMetric(metricData, encoder)),
       schemaUrl: metrics.scope.schemaUrl,
     }))

experimental/packages/otlp-transformer/src/resource/internal.ts

@@ -0,0 +1,25 @@
+/*
+ * 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
+ *
+ *      https://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.
+ */
+import { IResource as ISdkResource } from '@opentelemetry/resources';
+import { toAttributes } from '../common/internal';
+import { IResource } from './types';
+
+export function createResource(resource: ISdkResource): IResource {
+  return {
+    attributes: toAttributes(resource.attributes),
+    droppedAttributesCount: 0,
+  };
+}

experimental/packages/otlp-transformer/src/trace/index.ts

@@ -16,14 +16,15 @@
 import type { IResource } from '@opentelemetry/resources';
 import type { ReadableSpan } from '@opentelemetry/sdk-trace-base';
 import type { OtlpEncodingOptions } from '../common/types';
-import { toAttributes } from '../common/internal';
 import { sdkSpanToOtlpSpan } from './internal';
 import {
   IExportTraceServiceRequest,
   IResourceSpans,
   IScopeSpans,
 } from './types';
 import { Encoder, getOtlpEncoder } from '../common';
+import { createInstrumentationScope } from '../common/internal';
+import { createResource } from '../resource/internal';
 
 export function createExportTraceServiceRequest(
   spans: ReadableSpan[],
@@ -79,26 +80,23 @@ function spanRecordsToResourceSpans(
     while (!ilmEntry.done) {
       const scopeSpans = ilmEntry.value;
       if (scopeSpans.length > 0) {
-        const { name, version, schemaUrl } =
-          scopeSpans[0].instrumentationLibrary;
         const spans = scopeSpans.map(readableSpan =>
           sdkSpanToOtlpSpan(readableSpan, encoder)
         );
 
         scopeResourceSpans.push({
-          scope: { name, version },
+          scope: createInstrumentationScope(
+            scopeSpans[0].instrumentationLibrary
+          ),
           spans: spans,
-          schemaUrl: schemaUrl,
+          schemaUrl: scopeSpans[0].instrumentationLibrary.schemaUrl,
         });
       }
       ilmEntry = ilmIterator.next();
     }
     // TODO SDK types don't provide resource schema URL at this time
     const transformedSpans: IResourceSpans = {
-      resource: {
-        attributes: toAttributes(resource.attributes),
-        droppedAttributesCount: 0,
-      },
+      resource: createResource(resource),
       scopeSpans: scopeResourceSpans,
       schemaUrl: undefined,
     };

experimental/packages/otlp-transformer/test/logs.test.ts

@@ -46,7 +46,10 @@ function createExpectedLogJson(useHex: boolean): IExportLogsServiceRequest {
         schemaUrl: undefined,
         scopeLogs: [
           {
-            scope: { name: 'scope_name_1', version: '0.1.0' },
+            scope: {
+              name: 'scope_name_1',
+              version: '0.1.0',
+            },
             logRecords: [
               {
                 timeUnixNano: { low: 4132445859, high: 391214506 },

experimental/packages/otlp-transformer/test/trace.test.ts

@@ -68,7 +68,10 @@ function createExpectedSpanJson(options: OtlpEncodingOptions) {
         schemaUrl: undefined,
         scopeSpans: [
           {
-            scope: { name: 'myLib', version: '0.1.0' },
+            scope: {
+              name: 'myLib',
+              version: '0.1.0',
+            },
             spans: [
               {
                 traceId: traceId,