Separate Events API from Logs API

CHANGELOG.md

@@ -11,6 +11,8 @@ For experimental package changes, see the [experimental CHANGELOG](experimental/
 
 ### :rocket: (Enhancement)
 
+* feat (api-logs): separate Events API into its own package [3550](https://github.com/open-telemetry/opentelemetry-js/pull/3550) @martinkuba
+
 ### :bug: (Bug Fix)
 
 * fix: avoid grpc types dependency [#3551](https://github.com/open-telemetry/opentelemetry-js/pull/3551) @flarna

experimental/packages/api-events/.eslintignore

@@ -0,0 +1 @@
+build

experimental/packages/api-events/.eslintrc.js

@@ -0,0 +1,8 @@
+module.exports = {
+  "env": {
+      "mocha": true,
+      "commonjs": true,
+      "shared-node-browser": true
+  },
+  ...require('../../../eslint.config.js')
+}

experimental/packages/api-events/LICENSE

@@ -0,0 +1,201 @@
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experimental/packages/api-events/README.md

@@ -0,0 +1,60 @@
+# OpenTelemetry API for JavaScript
+
+[![NPM Published Version][npm-img]][npm-url]
+[![Apache License][license-image]][license-image]
+
+This package provides everything needed to interact with the unstable OpenTelemetry Events API, including all TypeScript interfaces, enums, and no-op implementations. It is intended for use both on the server and in the browser.
+
+## Beta Software - Use at your own risk
+
+The events API is considered alpha software and there is no guarantee of stability or long-term support. When the API is stabilized, it will be made available and supported long-term in the `@opentelemetry/api` package and this package will be deprecated.
+
+## Quick Start
+
+Purposefully left blank until SDK is available.
+
+## Version Compatibility
+
+Because the npm installer and node module resolution algorithm could potentially allow two or more copies of any given package to exist within the same `node_modules` structure, the OpenTelemetry API takes advantage of a variable on the `global` object to store the global API. When an API method in the API package is called, it checks if this `global` API exists and proxies calls to it if and only if it is a compatible API version. This means if a package has a dependency on an OpenTelemetry API version which is not compatible with the API used by the end user, the package will receive a no-op implementation of the API.
+
+## Advanced Use
+
+### API Methods
+
+If you are writing an instrumentation library, or prefer to call the API methods directly rather than using the `register` method on the Tracer/Meter/Logger Provider, OpenTelemetry provides direct access to the underlying API methods through the `@opentelemetry/api-events` package. API entry points are defined as global singleton objects `trace`, `metrics`, `logs`, `events`, `propagation`, and `context` which contain methods used to initialize SDK implementations and acquire resources from the API.
+
+- [Events API Documentation][events-api-docs]
+
+```javascript
+const api = require("@opentelemetry/api-events");
+
+/* A specific implementation of EventEmitterProvider comes from an SDK */
+const eventEmitterProvider = createEventEmitterProvider();
+
+/* Initialize EventEmitterProvider */
+api.events.setGlobalEventEmitterProvider(eventEmitterProvider);
+/* returns eventEmitterProvider (no-op if a working provider has not been initialized) */
+api.events.getEventEmitterProvider();
+/* returns an event emitter from the registered global event emitter provider (no-op if a working provider has not been initialized) */
+const eventEmitter = api.events.getEventEmitter(name, version);
+
+// logging an event in an instrumentation library
+eventEmitter.emit({ name: 'event-name', domain: 'event-domain' });
+```
+
+## Useful links
+
+- For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
+- For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
+- For help or feedback on this project, join us in [GitHub Discussions][discussions-url]
+
+## License
+
+Apache 2.0 - See [LICENSE][license-url] for more information.
+
+[discussions-url]: https://github.com/open-telemetry/opentelemetry-js/discussions
+[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/main/LICENSE
+[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
+[npm-url]: https://www.npmjs.com/package/@opentelemetry/api-logs
+[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Fapi-logs.svg
+[logs-api-docs]: https://open-telemetry.github.io/opentelemetry-js/modules/_opentelemetry_api_logs.html

experimental/packages/api-events/karma.conf.js

@@ -0,0 +1,24 @@
+/*!
+ * 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.
+ */
+
+const karmaWebpackConfig = require('../../../karma.webpack');
+const karmaBaseConfig = require('../../../karma.base');
+
+module.exports = (config) => {
+  config.set(Object.assign({}, karmaBaseConfig, {
+    webpack: karmaWebpackConfig
+  }))
+};

experimental/packages/api-events/package.json

@@ -0,0 +1,87 @@
+{
+  "name": "@opentelemetry/api-events",
+  "version": "0.35.0",
+  "description": "Public events API for OpenTelemetry",
+  "main": "build/src/index.js",
+  "module": "build/esm/index.js",
+  "esnext": "build/esnext/index.js",
+  "types": "build/src/index.d.ts",
+  "browser": {
+    "./src/platform/index.ts": "./src/platform/browser/index.ts",
+    "./build/esm/platform/index.js": "./build/esm/platform/browser/index.js",
+    "./build/esnext/platform/index.js": "./build/esnext/platform/browser/index.js",
+    "./build/src/platform/index.js": "./build/src/platform/browser/index.js"
+  },
+  "repository": "open-telemetry/opentelemetry-js",
+  "scripts": {
+    "prepublishOnly": "npm run compile",
+    "compile": "tsc --build tsconfig.json tsconfig.esm.json tsconfig.esnext.json",
+    "clean": "tsc --build --clean tsconfig.json tsconfig.esm.json tsconfig.esnext.json",
+    "test": "nyc ts-mocha -p tsconfig.json test/**/*.test.ts",
+    "test:browser": "nyc karma start --single-run",
+    "codecov": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../../",
+    "codecov:browser": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../../",
+    "build": "npm run compile",
+    "lint": "eslint . --ext .ts",
+    "lint:fix": "eslint . --ext .ts --fix",
+    "version": "node ../../../scripts/version-update.js",
+    "watch": "tsc --build --watch tsconfig.json tsconfig.esm.json tsconfig.esnext.json",
+    "precompile": "lerna run version --scope $(npm pkg get name) --include-dependencies",
+    "prewatch": "node ../../../scripts/version-update.js"
+  },
+  "keywords": [
+    "opentelemetry",
+    "nodejs",
+    "browser",
+    "profiling",
+    "events",
+    "stats",
+    "monitoring"
+  ],
+  "author": "OpenTelemetry Authors",
+  "license": "Apache-2.0",
+  "engines": {
+    "node": ">=14"
+  },
+  "files": [
+    "build/esm/**/*.js",
+    "build/esm/**/*.js.map",
+    "build/esm/**/*.d.ts",
+    "build/esnext/**/*.js",
+    "build/esnext/**/*.js.map",
+    "build/esnext/**/*.d.ts",
+    "build/src/**/*.js",
+    "build/src/**/*.js.map",
+    "build/src/**/*.d.ts",
+    "doc",
+    "LICENSE",
+    "README.md"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "dependencies": {
+    "@opentelemetry/api": "^1.0.0"
+  },
+  "devDependencies": {
+    "@types/mocha": "10.0.0",
+    "@types/node": "18.6.5",
+    "@types/webpack-env": "1.16.3",
+    "codecov": "3.8.3",
+    "istanbul-instrumenter-loader": "3.0.1",
+    "karma": "6.3.16",
+    "karma-chrome-launcher": "3.1.0",
+    "karma-coverage-istanbul-reporter": "3.0.3",
+    "karma-mocha": "2.0.1",
+    "karma-spec-reporter": "0.0.32",
+    "karma-webpack": "4.0.2",
+    "mocha": "10.0.0",
+    "nyc": "15.1.0",
+    "ts-loader": "8.4.0",
+    "ts-mocha": "10.0.0",
+    "typescript": "4.4.4",
+    "webpack": "4.46.0"
+  },
+  "homepage": "https://github.com/open-telemetry/opentelemetry-js/tree/main/experimental/packages/api-events",
+  "sideEffects": false
+}