feat(otlp-transformer)!: introduce separate entry-points for OTLP serializers

experimental/CHANGELOG.md

@@ -8,6 +8,19 @@ For notes on migrating to 2.x / 0.200.x see [the upgrade guide](doc/upgrade-to-2
 
 ### :boom: Breaking Changes
 
+* feat(oltp-transformer)!: move each serializer to its own entrypoint [#5263](https://github.com/open-telemetry/opentelemetry-js/pull/5263) @pichlermarc
+  * This package depends on all signals, as well as `protobuf.js`, so some bundlers like rollup would issue warnings even if the user made a conscious decision to not use a protobuf exporter
+  * (user-facing) All types except for `ISerializer` were removed from the main entrypoint, to get previously exported types, use the following entrypoints
+    * `@opentelemetry/otlp-transformer/metrics`: metrics export service return types
+    * `@opentelemetry/otlp-transformer/metrics/json`: metrics json serializer
+    * `@opentelemetry/otlp-transformer/metrics/protobuf`: metrics protobuf serializer
+    * `@opentelemetry/otlp-transformer/trace`: trace export service return types
+    * `@opentelemetry/otlp-transformer/trace/trace`: trace json serializer
+    * `@opentelemetry/otlp-transformer/trace/protobuf`: trace protobuf serializer
+    * `@opentelemetry/otlp-transformer/experimental/logs`: logs export service return types
+    * `@opentelemetry/otlp-transformer/experimental/logs/trace`: logs export service return types
+    * `@opentelemetry/otlp-transformer/experimental/logs/protobuf`: logs export service return types
+
 ### :rocket: Features
 
 * feat(exporter-prometheus): support withoutScopeInfo option [#5993](https://github.com/open-telemetry/opentelemetry-js/pull/5993) @cjihrig

experimental/packages/exporter-logs-otlp-grpc/src/OTLPLogExporter.ts

@@ -20,7 +20,7 @@ import {
   createOtlpGrpcExportDelegate,
   OTLPGRPCExporterConfigNode,
 } from '@opentelemetry/otlp-grpc-exporter-base';
-import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/protobuf';
 import { OTLPExporterBase } from '@opentelemetry/otlp-exporter-base';
 
 /**

experimental/packages/exporter-logs-otlp-http/src/platform/browser/OTLPLogExporter.ts

@@ -20,8 +20,8 @@ import type {
 } from '@opentelemetry/sdk-logs';
 import type { OTLPExporterConfigBase } from '@opentelemetry/otlp-exporter-base';
 import { OTLPExporterBase } from '@opentelemetry/otlp-exporter-base';
-import { JsonLogsSerializer } from '@opentelemetry/otlp-transformer';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';
+import { JsonLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/json';
 
 /**
  * Collector Logs Exporter for Web

experimental/packages/exporter-logs-otlp-http/src/platform/node/OTLPLogExporter.ts

@@ -20,7 +20,7 @@ import type {
 } from '@opentelemetry/sdk-logs';
 import type { OTLPExporterNodeConfigBase } from '@opentelemetry/otlp-exporter-base';
 import { OTLPExporterBase } from '@opentelemetry/otlp-exporter-base';
-import { JsonLogsSerializer } from '@opentelemetry/otlp-transformer';
+import { JsonLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/json';
 import {
   convertLegacyHttpOptions,
   createOtlpHttpExportDelegate,

experimental/packages/exporter-logs-otlp-proto/src/platform/browser/OTLPLogExporter.ts

@@ -18,7 +18,7 @@ import {
   OTLPExporterConfigBase,
   OTLPExporterBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/protobuf';
 
 import { ReadableLogRecord, LogRecordExporter } from '@opentelemetry/sdk-logs';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';

experimental/packages/exporter-logs-otlp-proto/src/platform/node/OTLPLogExporter.ts

@@ -18,7 +18,7 @@ import {
   OTLPExporterBase,
   OTLPExporterNodeConfigBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/protobuf';
 import {
   convertLegacyHttpOptions,
   createOtlpHttpExportDelegate,

experimental/packages/exporter-trace-otlp-grpc/src/OTLPTraceExporter.ts

@@ -20,7 +20,7 @@ import {
   createOtlpGrpcExportDelegate,
   OTLPGRPCExporterConfigNode,
 } from '@opentelemetry/otlp-grpc-exporter-base';
-import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer/trace/protobuf';
 import { OTLPExporterBase } from '@opentelemetry/otlp-exporter-base';
 
 /**

experimental/packages/exporter-trace-otlp-http/src/platform/browser/OTLPTraceExporter.ts

@@ -19,7 +19,7 @@ import {
   OTLPExporterConfigBase,
   OTLPExporterBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { JsonTraceSerializer } from '@opentelemetry/otlp-transformer';
+import { JsonTraceSerializer } from '@opentelemetry/otlp-transformer/trace/json';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';
 
 /**

experimental/packages/exporter-trace-otlp-http/src/platform/node/OTLPTraceExporter.ts

@@ -19,7 +19,7 @@ import {
   OTLPExporterNodeConfigBase,
   OTLPExporterBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { JsonTraceSerializer } from '@opentelemetry/otlp-transformer';
+import { JsonTraceSerializer } from '@opentelemetry/otlp-transformer/trace/json';
 import {
   convertLegacyHttpOptions,
   createOtlpHttpExportDelegate,

experimental/packages/exporter-trace-otlp-proto/src/platform/browser/OTLPTraceExporter.ts

@@ -19,7 +19,7 @@ import {
   OTLPExporterConfigBase,
   OTLPExporterBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer/trace/protobuf';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';
 
 const DEFAULT_COLLECTOR_RESOURCE_PATH = 'v1/traces';

experimental/packages/exporter-trace-otlp-proto/src/platform/node/OTLPTraceExporter.ts

@@ -19,7 +19,7 @@ import {
   OTLPExporterNodeConfigBase,
   OTLPExporterBase,
 } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer/trace/protobuf';
 import {
   createOtlpHttpExportDelegate,
   convertLegacyHttpOptions,

experimental/packages/opentelemetry-exporter-metrics-otlp-grpc/src/OTLPMetricExporter.ts

@@ -23,7 +23,7 @@ import {
   createOtlpGrpcExportDelegate,
   OTLPGRPCExporterConfigNode,
 } from '@opentelemetry/otlp-grpc-exporter-base';
-import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/protobuf';
 
 /**
  * OTLP-gRPC metric exporter

experimental/packages/opentelemetry-exporter-metrics-otlp-http/src/platform/browser/OTLPMetricExporter.ts

@@ -17,7 +17,7 @@
 import { OTLPMetricExporterOptions } from '../../OTLPMetricExporterOptions';
 import { OTLPMetricExporterBase } from '../../OTLPMetricExporterBase';
 import { OTLPExporterConfigBase } from '@opentelemetry/otlp-exporter-base';
-import { JsonMetricsSerializer } from '@opentelemetry/otlp-transformer';
+import { JsonMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/json';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';
 
 /**

experimental/packages/opentelemetry-exporter-metrics-otlp-http/src/platform/node/OTLPMetricExporter.ts

@@ -17,7 +17,7 @@
 import { OTLPMetricExporterOptions } from '../../OTLPMetricExporterOptions';
 import { OTLPMetricExporterBase } from '../../OTLPMetricExporterBase';
 import { OTLPExporterNodeConfigBase } from '@opentelemetry/otlp-exporter-base';
-import { JsonMetricsSerializer } from '@opentelemetry/otlp-transformer';
+import { JsonMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/json';
 import {
   convertLegacyHttpOptions,
   createOtlpHttpExportDelegate,

experimental/packages/opentelemetry-exporter-metrics-otlp-proto/src/platform/browser/OTLPMetricExporter.ts

@@ -17,7 +17,7 @@
 import { OTLPMetricExporterOptions } from '@opentelemetry/exporter-metrics-otlp-http';
 import { OTLPMetricExporterBase } from '@opentelemetry/exporter-metrics-otlp-http';
 import { OTLPExporterNodeConfigBase } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/protobuf';
 import { createLegacyOtlpBrowserExportDelegate } from '@opentelemetry/otlp-exporter-base/browser-http';
 
 export class OTLPMetricExporter extends OTLPMetricExporterBase {

experimental/packages/opentelemetry-exporter-metrics-otlp-proto/src/platform/node/OTLPMetricExporter.ts

@@ -17,7 +17,7 @@
 import { OTLPMetricExporterOptions } from '@opentelemetry/exporter-metrics-otlp-http';
 import { OTLPMetricExporterBase } from '@opentelemetry/exporter-metrics-otlp-http';
 import { OTLPExporterNodeConfigBase } from '@opentelemetry/otlp-exporter-base';
-import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer';
+import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/protobuf';
 import {
   convertLegacyHttpOptions,
   createOtlpHttpExportDelegate,

experimental/packages/otlp-exporter-base/test/common/logging-response-handler.test.ts

@@ -15,7 +15,7 @@
  */
 import { createLoggingPartialSuccessResponseHandler } from '../../src/logging-response-handler';
 import * as sinon from 'sinon';
-import { IExportTraceServiceResponse } from '@opentelemetry/otlp-transformer';
+import { IExportTraceServiceResponse } from '@opentelemetry/otlp-transformer/trace';
 import { registerMockDiagLogger } from './test-utils';
 
 describe('loggingResponseHandler', function () {

experimental/packages/otlp-transformer/README.md

@@ -19,43 +19,60 @@ To get started you will need to install a compatible OpenTelemetry API.
 npm install @opentelemetry/api
 ```
 
+### Experimental Features and Entrypoint
+
+This package is currently marked as experimental. New minor versions may include breaking changes, regardless of
+the entrypoint used. Once the package is marked as stable, only the `experimental/` entrypoint will break in
+minor versions of the package. If you use experimental features it is therefore recommended to pin the package or use
+to depend on a tilde-version.
+
 ### Serialize Traces/Metrics/Logs
 
-This module exports serializers to serialize traces, metrics and logs from the OpenTelemetry SDK into protocol buffers
+This package exports serializers to serialize traces, metrics and logs from the OpenTelemetry SDK into protocol buffers
 or JSON which can be sent over HTTP or gRPC (protobuf-only) to the OpenTelemetry collector or a compatible receiver.
 
 ```typescript
-import {
-  JsonLogsSerializer,
-  JsonMetricsSerializer,
-  JsonTraceSerializer,
-  ProtobufLogsSerializer,
-  ProtobufMetricsSerializer,
-  ProtobufTraceSerializer,
-  IExportLogsServiceResponse,
-  IExportMetricsServiceResponse,
-  IExportTraceServiceResponse,
-} from '@opentelemetry/otlp-transformer';
-
-// serialize to JSON export requests
-const serializedJsonLogs: Uint8Array = JsonLogsSerializer.serializeRequest(readableLogRecords);
-const serializedJsonMetrics: Uint8Array = JsonMetricsSerializer.serializeRequest(resourceMetrics);
-const serializedJsonTraces: Uint8Array = JsonTraceSerializer.serializeRequest(readableSpans);
+// Logs (protobuf) - experimental
+import { IExportLogsServiceResponse } from '@opentelemetry/otlp-transformer/experimental/logs';
+import { ProtobufLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/protobuf';
 
-// serialize to Protobuf export requests
 const serializedProtobufLogs: Uint8Array = ProtobufLogsSerializer.serializeRequest(readableLogRecords);
-const serializedProtobufMetrics: Uint8Array = ProtobufMetricsSerializer.serializeRequest(resourceMetrics);
-const serializedProtobufTraces: Uint8Array = ProtobufTraceSerializer.serializeRequest(readableSpans);
+const deserializedProtobufLogResponse: IExportLogsServiceResponse = ProtobufLogsSerializer.deserializeResponse(protobufLogResponse);
+
+// Logs (json) - experimental
+import { IExportLogsServiceResponse } from '@opentelemetry/otlp-transformer/experimental/logs';
+import { JsonLogsSerializer } from '@opentelemetry/otlp-transformer/experimental/logs/json';
 
-// deserialize JSON export responses
+const serializedJsonLogs: Uint8Array = JsonLogsSerializer.serializeRequest(readableLogRecords);
 const deserializedJsonLogResponse: IExportLogsServiceResponse = JsonLogsSerializer.deserializeResponse(jsonLogResponse);
-const deserializedJsonMetricsResponse: IExportMetricsServiceResponse = JsonMetricsSerializer.deserializeResponse(jsonMetricsResponse);
-const deserializedJsonTraceResponse: IExportTraceServiceResponse = JsonTraceSerializer.deserializeResponse(jsonTraceResponse);
 
-// deserialize Protobuf export responses
-const deserializedProtobufLogResponse: IExportLogsServiceResponse = ProtobufLogsSerializer.deserializeResponse(protobufLogResponse);
+// Metrics (protobuf)
+import { IExportMetricsServiceResponse } from '@opentelemetry/otlp-transformer/metrics'
+import { ProtobufMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/protobuf';
+
+const serializedProtobufMetrics: Uint8Array = ProtobufMetricsSerializer.serializeRequest(resourceMetrics);
 const deserializedProtobufMetricsResponse: IExportMetricsServiceResponse = ProtobufMetricsSerializer.deserializeResponse(protobufMetricsResponse);
+
+// Metrics (json)
+import { IExportMetricsServiceResponse } from '@opentelemetry/otlp-transformer/metrics'
+import { JsonMetricsSerializer } from '@opentelemetry/otlp-transformer/metrics/json';
+
+const serializedJsonMetrics: Uint8Array = JsonMetricsSerializer.serializeRequest(resourceMetrics);
+const deserializedJsonMetricsResponse: IExportMetricsServiceResponse = JsonMetricsSerializer.deserializeResponse(jsonMetricsResponse);
+
+// Traces (protobuf)
+import { IExportTraceServiceResponse } from '@opentelemetry/otlp-transformer/trace'
+import { ProtobufTraceSerializer } from '@opentelemetry/otlp-transformer/trace/protobuf';
+
+const serializedProtobufTraces: Uint8Array = ProtobufTraceSerializer.serializeRequest(readableSpans);
 const deserializedProtobufTraceResponse: IExportTraceServiceResponse = ProtobufTraceSerializer.deserializeResponse(protobufTraceResponse);
+
+// Traces (json)
+import { IExportTraceServiceResponse } from '@opentelemetry/otlp-transformer/trace'
+import { JsonTraceSerializer } from '@opentelemetry/otlp-transformer/trace/json';
+
+const deserializedJsonTraceResponse: IExportTraceServiceResponse = JsonTraceSerializer.deserializeResponse(jsonTraceResponse);
+const serializedJsonTraces: Uint8Array = JsonTraceSerializer.serializeRequest(readableSpans);
 ```
 
 ## Useful links

experimental/packages/otlp-transformer/package.json

@@ -10,6 +10,68 @@
   "esnext": "build/esnext/index.js",
   "types": "build/src/index.d.ts",
   "main": "build/src/index.js",
+  "exports": {
+    ".": {
+      "module": "./build/esm/index.js",
+      "esnext": "./build/esnext/index.js",
+      "types": "./build/src/index.d.ts",
+      "default": "./build/src/index.js"
+    },
+    "./metrics": {
+      "module": "./build/esm/metrics/index.js",
+      "esnext": "./build/esnext/metrics/index.js",
+      "types": "./build/src/metrics/index.d.ts",
+      "default": "./build/src/metrics/index.js"
+    },
+    "./metrics/protobuf": {
+      "module": "./build/esm/metrics/protobuf/index.js",
+      "esnext": "./build/esnext/metrics/protobuf/index.js",
+      "types": "./build/src/metrics/protobuf/index.d.ts",
+      "default": "./build/src/metrics/protobuf/index.js"
+    },
+    "./metrics/json": {
+      "module": "./build/esm/metrics/json/index.js",
+      "esnext": "./build/esnext/metrics/json/index.js",
+      "types": "./build/src/metrics/json/index.d.ts",
+      "default": "./build/src/metrics/json/index.js"
+    },
+    "./trace": {
+      "module": "./build/esm/trace/index.js",
+      "esnext": "./build/esnext/trace/index.js",
+      "types": "./build/src/trace/index.d.ts",
+      "default": "./build/src/trace/index.js"
+    },
+    "./trace/protobuf": {
+      "module": "./build/esm/trace/protobuf/index.js",
+      "esnext": "./build/esnext/trace/protobuf/index.js",
+      "types": "./build/src/trace/protobuf/index.d.ts",
+      "default": "./build/src/trace/protobuf/index.js"
+    },
+    "./trace/json": {
+      "module": "./build/esm/trace/json/index.js",
+      "esnext": "./build/esnext/trace/json/index.js",
+      "types": "./build/src/trace/json/index.d.ts",
+      "default": "./build/src/trace/json/index.js"
+    },
+    "./experimental/logs": {
+      "module": "./build/esm/logs/index.js",
+      "esnext": "./build/esnext/logs/index.js",
+      "types": "./build/src/logs/index.d.ts",
+      "default": "./build/src/logs/index.js"
+    },
+    "./experimental/logs/protobuf": {
+      "module": "./build/esm/logs/protobuf/index.js",
+      "esnext": "./build/esnext/logs/protobuf/index.js",
+      "types": "./build/src/logs/protobuf/index.d.ts",
+      "default": "./build/src/logs/protobuf/index.js"
+    },
+    "./experimental/logs/json": {
+      "module": "./build/esm/logs/json/index.js",
+      "esnext": "./build/esnext/logs/json/index.js",
+      "types": "./build/src/logs/json/index.d.ts",
+      "default": "./build/src/logs/json/index.js"
+    }
+  },
   "repository": "open-telemetry/opentelemetry-js",
   "scripts": {
     "prepublishOnly": "npm run compile",

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

@@ -14,25 +14,5 @@
  * limitations under the License.
  */
 
-export type {
-  IExportMetricsPartialSuccess,
-  IExportMetricsServiceResponse,
-} from './metrics';
-export type {
-  IExportTracePartialSuccess,
-  IExportTraceServiceResponse,
-} from './trace';
-export type {
-  IExportLogsServiceResponse,
-  IExportLogsPartialSuccess,
-} from './logs';
-
-export { ProtobufLogsSerializer } from './logs/protobuf';
-export { ProtobufMetricsSerializer } from './metrics/protobuf';
-export { ProtobufTraceSerializer } from './trace/protobuf';
-
-export { JsonLogsSerializer } from './logs/json';
-export { JsonMetricsSerializer } from './metrics/json';
-export { JsonTraceSerializer } from './trace/json';
-
+// IMPORTANT: exports added here are public
 export type { ISerializer } from './i-serializer';