feat(resource)!: Remove resource class export in favor of functions and types only to aid in cross-version compatibility

CHANGELOG.md

@@ -93,6 +93,11 @@ For semantic convention package changes, see the [semconv CHANGELOG](packages/se
   * (user-facing): `baggageUtils.parsePairKeyValue` was an internal utility function that was unintentionally exported. It has been removed without replacement.
   * (user-facing): `TimeOriginLegacy` has been removed without replacement.
   * (user-facing): `isAttributeKey` was an internal utility function that was unintentionally exported. It has been removed without replacement.
+* feat(resource)!: Remove resource class export in favor of functions and types only to aid in cross-version compatibility [#5421](https://github.com/open-telemetry/opentelemetry-js/pull/5421)
+  * Renames `Resource` class to `ResourceImpl` and makes it package-private
+  * Renames `IResource` interface to `Resource`
+  * Export function `resourceFromAttributes` to create a `Resource` from a `DetectedAttributes` object
+  * Only export types and functions. This aids in cross-version compatibility and makes it more easily extensible in the future.
 
 ### :rocket: (Enhancement)
 

README.md

@@ -75,14 +75,14 @@ const process = require('process');
 const opentelemetry = require('@opentelemetry/sdk-node');
 const { getNodeAutoInstrumentations } = require('@opentelemetry/auto-instrumentations-node');
 const { ConsoleSpanExporter } = require('@opentelemetry/sdk-trace-base');
-const { Resource } = require('@opentelemetry/resources');
+const { resourceFromAttributes } = require('@opentelemetry/resources');
 const { SEMRESATTRS_SERVICE_NAME } = require('@opentelemetry/semantic-conventions');
 
 // configure the SDK to export telemetry data to the console
 // enable all auto-instrumentations from the meta package
 const traceExporter = new ConsoleSpanExporter();
 const sdk = new opentelemetry.NodeSDK({
-  resource: new Resource({
+  resource: resourceFromAttributes({
     [SEMRESATTRS_SERVICE_NAME]: 'my-service',
   }),
   traceExporter,

experimental/packages/opentelemetry-browser-detector/README.md

@@ -13,12 +13,12 @@ npm install --save @opentelemetry/opentelemetry-browser-detector
 ## Usage
 
 ```js
-import { Resource, detectResources } from '@opentelemetry/resources';
+import { resourceFromAttributes, detectResources } from '@opentelemetry/resources';
 import { SEMRESATTRS_SERVICE_NAME } from '@opentelemetry/semantic-conventions';
 import { browserDetector } from '@opentelemetry/opentelemetry-browser-detector';
 
 async function start(){
-  let resource= new Resource({
+  let resource = resourceFromAttributes({
     [SEMRESATTRS_SERVICE_NAME]: 'Test App Name',
   });
   let detectedResources= await detectResources({detectors:[browserDetector]});

experimental/packages/opentelemetry-browser-detector/src/BrowserDetector.ts

@@ -18,8 +18,8 @@
 import {
   DetectedResource,
   ResourceDetector,
-  Resource,
   ResourceDetectionConfig,
+  EMPTY_RESOURCE,
 } from '@opentelemetry/resources';
 import { BROWSER_ATTRIBUTES, UserAgentData } from './types';
 
@@ -30,7 +30,7 @@
   detect(config?: ResourceDetectionConfig): DetectedResource {
     const isBrowser = typeof navigator !== 'undefined';
     if (!isBrowser) {
-      return Resource.EMPTY;
+      return EMPTY_RESOURCE;
     }
     const browserResource: Attributes = getBrowserAttributes();
     return this._getResourceAttributes(browserResource, config);
@@ -53,7 +53,7 @@
       diag.debug(
         'BrowserDetector failed: Unable to find required browser resources. '
       );
-      return Resource.EMPTY;
+      return EMPTY_RESOURCE;
     } else {
       return { attributes: browserResource };
     }

experimental/packages/opentelemetry-exporter-prometheus/src/PrometheusSerializer.ts

@@ -24,7 +24,7 @@ import {
   Histogram,
 } from '@opentelemetry/sdk-metrics';
 import { hrTimeToMilliseconds } from '@opentelemetry/core';
-import { IResource } from '@opentelemetry/resources';
+import { Resource } from '@opentelemetry/resources';
 
 type PrometheusDataTypeLiteral =
   | 'counter'
@@ -324,7 +324,7 @@ export class PrometheusSerializer {
     return results;
   }
 
-  protected _serializeResource(resource: IResource): string {
+  protected _serializeResource(resource: Resource): string {
     const name = 'target_info';
     const help = `# HELP ${name} Target metadata`;
     const type = `# TYPE ${name} gauge`;

experimental/packages/opentelemetry-exporter-prometheus/test/PrometheusSerializer.test.ts

@@ -34,7 +34,7 @@ import {
   sdkVersion,
   serviceName,
 } from './util';
-import { Resource } from '@opentelemetry/resources';
+import { resourceFromAttributes } from '@opentelemetry/resources';
 import { AggregationType } from '@opentelemetry/sdk-metrics';
 
 const attributes = {
@@ -703,14 +703,12 @@ describe('PrometheusSerializer', () => {
     it('should serialize resource', () => {
       const serializer = new PrometheusSerializer(undefined, true);
       const result = serializer['_serializeResource'](
-        new Resource({
-          attributes: {
-            env: 'prod',
-            hostname: 'myhost',
-            datacenter: 'sdc',
-            region: 'europe',
-            owner: 'frontend',
-          },
+        resourceFromAttributes({
+          env: 'prod',
+          hostname: 'myhost',
+          datacenter: 'sdc',
+          region: 'europe',
+          owner: 'frontend',
         })
       );
 

experimental/packages/opentelemetry-exporter-prometheus/test/util.ts

@@ -15,7 +15,7 @@
  */
 
 import * as sinon from 'sinon';
-import { Resource } from '@opentelemetry/resources';
+import { DEFAULT_RESOURCE } from '@opentelemetry/resources';
 import {
   SEMRESATTRS_SERVICE_NAME,
   SEMRESATTRS_TELEMETRY_SDK_LANGUAGE,
@@ -29,19 +29,23 @@ export function mockHrTime() {
   sinon.useFakeTimers(mockedHrTimeMs);
 }
 
-export const serviceName = Resource.default()
-  .attributes[SEMRESATTRS_SERVICE_NAME]?.toString()
+export const serviceName = DEFAULT_RESOURCE.attributes[
+  SEMRESATTRS_SERVICE_NAME
+]?.toString()
   .replace(/\\/g, '\\\\')
   .replace(/\n/g, '\\n');
-export const sdkLanguage = Resource.default()
-  .attributes[SEMRESATTRS_TELEMETRY_SDK_LANGUAGE]?.toString()
+export const sdkLanguage = DEFAULT_RESOURCE.attributes[
+  SEMRESATTRS_TELEMETRY_SDK_LANGUAGE
+]?.toString()
   .replace(/\\/g, '\\\\')
   .replace(/\n/g, '\\n');
-export const sdkName = Resource.default()
-  .attributes[SEMRESATTRS_TELEMETRY_SDK_NAME]?.toString()
+export const sdkName = DEFAULT_RESOURCE.attributes[
+  SEMRESATTRS_TELEMETRY_SDK_NAME
+]?.toString()
   .replace(/\\/g, '\\\\')
   .replace(/\n/g, '\\n');
-export const sdkVersion = Resource.default()
-  .attributes[SEMRESATTRS_TELEMETRY_SDK_VERSION]?.toString()
+export const sdkVersion = DEFAULT_RESOURCE.attributes[
+  SEMRESATTRS_TELEMETRY_SDK_VERSION
+]?.toString()
   .replace(/\\/g, '\\\\')
   .replace(/\n/g, '\\n');

experimental/packages/opentelemetry-sdk-node/src/sdk.ts

@@ -27,14 +27,15 @@ import {
   registerInstrumentations,
 } from '@opentelemetry/instrumentation';
 import {
+  DEFAULT_RESOURCE,
   detectResources,
   envDetector,
   hostDetector,
-  IResource,
-  processDetector,
   Resource,
+  processDetector,
   ResourceDetectionConfig,
   ResourceDetector,
+  resourceFromAttributes,
 } from '@opentelemetry/resources';
 import {
   LogRecordProcessor,
@@ -208,7 +209,7 @@ export class NodeSDK {
   private _meterProviderConfig?: MeterProviderConfig;
   private _instrumentations: Instrumentation[];
 
-  private _resource: IResource;
+  private _resource: Resource;
   private _resourceDetectors: Array<ResourceDetector>;
 
   private _autoDetectResources: boolean;
@@ -244,7 +245,7 @@ export class NodeSDK {
 
     this._configuration = configuration;
 
-    this._resource = configuration.resource ?? Resource.default();
+    this._resource = configuration.resource ?? DEFAULT_RESOURCE;
     this._autoDetectResources = configuration.autoDetectResources ?? true;
     if (!this._autoDetectResources) {
       this._resourceDetectors = [];
@@ -352,10 +353,8 @@ export class NodeSDK {
       this._serviceName === undefined
         ? this._resource
         : this._resource.merge(
-            new Resource({
-              attributes: {
-                [ATTR_SERVICE_NAME]: this._serviceName,
-              },
+            resourceFromAttributes({
+              [ATTR_SERVICE_NAME]: this._serviceName,
             })
           );
 

experimental/packages/opentelemetry-sdk-node/src/types.ts

@@ -17,7 +17,7 @@
 import type { ContextManager } from '@opentelemetry/api';
 import { TextMapPropagator } from '@opentelemetry/api';
 import { Instrumentation } from '@opentelemetry/instrumentation';
-import { IResource, ResourceDetector } from '@opentelemetry/resources';
+import { Resource, ResourceDetector } from '@opentelemetry/resources';
 import { LogRecordProcessor } from '@opentelemetry/sdk-logs';
 import { IMetricReader, ViewOptions } from '@opentelemetry/sdk-metrics';
 import {
@@ -38,7 +38,7 @@ export interface NodeSDKConfiguration {
   metricReader: IMetricReader;
   views: ViewOptions[];
   instrumentations: (Instrumentation | Instrumentation[])[];
-  resource: IResource;
+  resource: Resource;
   resourceDetectors: Array<ResourceDetector>;
   sampler: Sampler;
   serviceName?: string;

experimental/packages/opentelemetry-sdk-node/test/sdk.test.ts

@@ -64,9 +64,9 @@ import {
   envDetector,
   processDetector,
   hostDetector,
-  Resource,
   serviceInstanceIdDetector,
   DetectedResource,
+  DEFAULT_RESOURCE,
 } from '@opentelemetry/resources';
 import { OTLPTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
 import { logs, ProxyLoggerProvider } from '@opentelemetry/api-logs';
@@ -956,7 +956,7 @@ describe('Node SDK', () => {
         const resource = sdk['_resource'];
         await resource.waitForAsyncAttributes?.();
 
-        assert.deepStrictEqual(resource, Resource.default());
+        assert.deepStrictEqual(resource, DEFAULT_RESOURCE);
         await sdk.shutdown();
       });
     });

experimental/packages/opentelemetry-sdk-node/test/util/resource-assertions.ts

@@ -16,7 +16,7 @@
 
 import { SDK_INFO } from '@opentelemetry/core';
 import * as assert from 'assert';
-import { IResource, Resource } from '@opentelemetry/resources';
+import { Resource } from '@opentelemetry/resources';
 import {
   SEMRESATTRS_CLOUD_ACCOUNT_ID,
   SEMRESATTRS_CLOUD_AVAILABILITY_ZONE,
@@ -260,7 +260,7 @@ export const assertTelemetrySDKResource = (
  * @param validations validations for the resource attributes
  */
 export const assertServiceResource = (
-  resource: IResource,
+  resource: Resource,
   validations: {
     name: string;
     instanceId?: string;
@@ -362,7 +362,7 @@ const assertHasOneLabel = (prefix: string, resource: Resource): void => {
   );
 };
 
-export const assertServiceInstanceIdIsUUID = (resource: IResource): void => {
+export const assertServiceInstanceIdIsUUID = (resource: Resource): void => {
   const UUID_REGEX =
     /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
   assert.equal(

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

@@ -15,7 +15,7 @@
  */
 
 /** Properties of a Resource. */
-export interface IResource {
+export interface Resource {
   /** Resource attributes */
   attributes: IKeyValue[];
 

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

@@ -17,13 +17,13 @@ import type {
   IAnyValue,
   IInstrumentationScope,
   IKeyValue,
-  IResource,
+  Resource,
 } from './internal-types';
 import { Attributes } from '@opentelemetry/api';
 import { InstrumentationScope } from '@opentelemetry/core';
-import { IResource as ISdkResource } from '@opentelemetry/resources';
+import { Resource as ISdkResource } from '@opentelemetry/resources';
 
-export function createResource(resource: ISdkResource): IResource {
+export function createResource(resource: ISdkResource): Resource {
   return {
     attributes: toAttributes(resource.attributes),
     droppedAttributesCount: 0,

experimental/packages/otlp-transformer/src/logs/internal-types.ts

@@ -19,7 +19,7 @@ import type {
   IAnyValue,
   IInstrumentationScope,
   IKeyValue,
-  IResource,
+  Resource,
 } from '../common/internal-types';
 
 /** Properties of an ExportLogsServiceRequest. */
@@ -31,7 +31,7 @@ export interface IExportLogsServiceRequest {
 /** Properties of a ResourceLogs. */
 export interface IResourceLogs {
   /** ResourceLogs resource */
-  resource?: IResource;
+  resource?: Resource;
 
   /** ResourceLogs scopeLogs */
   scopeLogs: IScopeLogs[];

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

@@ -21,7 +21,7 @@ import {
   ILogRecord,
   IResourceLogs,
 } from './internal-types';
-import { IResource } from '@opentelemetry/resources';
+import { Resource } from '@opentelemetry/resources';
 import { Encoder, getOtlpEncoder } from '../common/utils';
 import {
   createInstrumentationScope,
@@ -45,9 +45,9 @@ export function createExportLogsServiceRequest(
 
 function createResourceMap(
   logRecords: ReadableLogRecord[]
-): Map<IResource, Map<string, ReadableLogRecord[]>> {
+): Map<Resource, Map<string, ReadableLogRecord[]>> {
   const resourceMap: Map<
-    IResource,
+    Resource,
     Map<string, ReadableLogRecord[]>
   > = new Map();
 

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

@@ -17,7 +17,7 @@ import {
   Fixed64,
   IInstrumentationScope,
   IKeyValue,
-  IResource,
+  Resource,
 } from '../common/internal-types';
 
 /** Properties of an ExportMetricsServiceRequest. */
@@ -29,7 +29,7 @@ export interface IExportMetricsServiceRequest {
 /** Properties of a ResourceMetrics. */
 export interface IResourceMetrics {
   /** ResourceMetrics resource */
-  resource?: IResource;
+  resource?: Resource;
 
   /** ResourceMetrics scopeMetrics */
   scopeMetrics: IScopeMetrics[];

experimental/packages/otlp-transformer/src/trace/internal-types.ts

@@ -18,7 +18,7 @@ import {
   Fixed64,
   IInstrumentationScope,
   IKeyValue,
-  IResource,
+  Resource,
 } from '../common/internal-types';
 
 /** Properties of an ExportTraceServiceRequest. */
@@ -30,7 +30,7 @@ export interface IExportTraceServiceRequest {
 /** Properties of a ResourceSpans. */
 export interface IResourceSpans {
   /** ResourceSpans resource */
-  resource?: IResource;
+  resource?: Resource;
 
   /** ResourceSpans scopeSpans */
   scopeSpans: IScopeSpans[];

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

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 import type { Link } from '@opentelemetry/api';
-import { IResource } from '@opentelemetry/resources';
+import { Resource } from '@opentelemetry/resources';
 import type { ReadableSpan, TimedEvent } from '@opentelemetry/sdk-trace-base';
 import type { Encoder } from '../common/utils';
 import {
@@ -112,7 +112,7 @@ export function createExportTraceServiceRequest(
 }
 
 function createResourceMap(readableSpans: ReadableSpan[]) {
-  const resourceMap: Map<IResource, Map<string, ReadableSpan[]>> = new Map();
+  const resourceMap: Map<Resource, Map<string, ReadableSpan[]>> = new Map();
   for (const record of readableSpans) {
     let ilsMap = resourceMap.get(record.resource);