feat: stackdriver trace exporter

examples/basic-tracer-node/.gitignore

@@ -0,0 +1 @@
+service_account_key.json

examples/basic-tracer-node/multi_exporter.js

@@ -17,10 +17,9 @@ const collectorExporter = new CollectorExporter({serviceName: 'basic-service'});
 tracer.addSpanProcessor(new BatchSpanProcessor(zipkinExporter, {
   bufferSize: 10 // This is added for example, default size is 100.
 }));
-
-// It is recommended to use SimpleSpanProcessor in case of Jaeger exporter as
-// it's internal client already handles the spans with batching logic.
-tracer.addSpanProcessor(new SimpleSpanProcessor(jaegerExporter));
+tracer.addSpanProcessor(new BatchSpanProcessor(jaegerExporter), {
+  bufferSize: 10
+});
 
 tracer.addSpanProcessor(new SimpleSpanProcessor(collectorExporter));
 

packages/opentelemetry-exporter-stackdriver-trace/.npmignore

@@ -0,0 +1,4 @@
+/bin
+/coverage
+/doc
+/test

packages/opentelemetry-exporter-stackdriver-trace/LICENSE

@@ -0,0 +1,201 @@
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packages/opentelemetry-exporter-stackdriver-trace/README.md

@@ -0,0 +1,73 @@
+# OpenTelemetry Stackdriver Trace Exporter
+[![Gitter chat][gitter-image]][gitter-url]
+[![NPM Published Version][npm-img]][npm-url]
+[![dependencies][dependencies-image]][dependencies-url]
+[![devDependencies][devDependencies-image]][devDependencies-url]
+[![Apache License][license-image]][license-image]
+
+OpenTelemetry Stackdriver Trace Exporter allows the user to send collected traces to Stackdriver.
+
+[Stackdriver Trace](https://cloud.google.com/trace) is a distributed tracing system. It helps gather timing data needed to troubleshoot latency problems in microservice architectures. It manages both the collection and lookup of this data.
+
+## Setup
+
+Stackdriver Trace is a managed service provided by Google Cloud Platform.
+
+## Usage
+
+Install the exporter on your application and pass the options, it must contain a service name and the project id of your GCP project.
+
+```js
+const { StackdriverTraceExporter } = require('@opentelemetry/exporter-stackdriver-trace');
+
+const options = {
+  serviceName: 'your-application-name',
+  projectId: 'your-gcp-project-id',
+
+  /** One of the following three keys is required */
+  keyFile: './service_account_key.json',
+  keyFileName: './service_account_key.json',
+  credentials: {
+    client_email: string,
+    private_key: string,
+  },
+}
+
+const exporter = new StackdriverTraceExporter(options);
+```
+
+Now, register the exporter and start tracing.
+
+```js
+tracer.addSpanProcessor(new BatchSpanProcessor(exporter));
+```
+
+You can use built-in `SimpleSpanProcessor` or `BatchSpanProcessor` or write your own.
+
+- [SimpleSpanProcessor](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/sdk-tracing.md#simple-processor): The implementation of `SpanProcessor` that passes ended span directly to the configured `SpanExporter`.
+- [BatchSpanProcessor](https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/sdk-tracing.md#batching-processor): The implementation of the `SpanProcessor` that batches ended spans and pushes them to the configured `SpanExporter`. It is recommended to use this `SpanProcessor` for better performance and optimization.
+
+## Viewing your traces
+
+Visit the google cloud trace UI at https://console.cloud.google.com/traces/list?project=your-gcp-project-id
+
+## Useful links
+- For more information on OpenTelemetry, visit: <https://opentelemetry.io/>
+- For more about OpenTelemetry JavaScript: <https://github.com/open-telemetry/opentelemetry-js>
+- Learn more about Stackdriver Trace at https://cloud.google.com/trace
+- For help or feedback on this project, join us on [gitter][gitter-url]
+
+## License
+
+Apache 2.0 - See [LICENSE][license-url] for more information.
+
+[gitter-image]: https://badges.gitter.im/open-telemetry/opentelemetry-js.svg
+[gitter-url]: https://gitter.im/open-telemetry/opentelemetry-node?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
+[license-url]: https://github.com/open-telemetry/opentelemetry-js/blob/master/LICENSE
+[license-image]: https://img.shields.io/badge/license-Apache_2.0-green.svg?style=flat
+[dependencies-image]: https://david-dm.org/open-telemetry/opentelemetry-js/status.svg?path=packages/opentelemetry-exporter-stackdriver-trace
+[dependencies-url]: https://david-dm.org/open-telemetry/opentelemetry-js?path=packages%2Fopentelemetry-exporter-stackdriver-trace
+[devDependencies-image]: https://david-dm.org/open-telemetry/opentelemetry-js/dev-status.svg?path=packages/opentelemetry-exporter-stackdriver-trace
+[devDependencies-url]: https://david-dm.org/open-telemetry/opentelemetry-js?path=packages%2Fopentelemetry-exporter-stackdriver-trace&type=dev
+[npm-url]: https://www.npmjs.com/package/@opentelemetry/exporter-stackdriver-trace
+[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Fexporter-stackdriver-trace.svg

packages/opentelemetry-exporter-stackdriver-trace/package.json

@@ -0,0 +1,66 @@
+{
+  "name": "@opentelemetry/exporter-stackdriver-trace",
+  "version": "0.3.1",
+  "description": "OpenTelemetry StackDriver Trace Exporter allows the user to send collected traces to StackDriver Trace.",
+  "main": "build/src/index.js",
+  "types": "build/src/index.d.ts",
+  "repository": "open-telemetry/opentelemetry-js",
+  "scripts": {
+    "check": "gts check",
+    "clean": "rimraf build/*",
+    "codecov": "nyc report --reporter=json && codecov -f coverage/*.json -p ../../",
+    "compile": "tsc -p .",
+    "fix": "gts fix",
+    "precompile": "tsc --version",
+    "prepare": "npm run compile",
+    "tdd": "yarn test -- --watch-extensions ts --watch",
+    "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.ts'"
+  },
+  "keywords": [
+    "opentelemetry",
+    "nodejs",
+    "tracing",
+    "profiling",
+    "stackdriver",
+    "stackdriver-trace"
+  ],
+  "author": "OpenTelemetry Authors",
+  "license": "Apache-2.0",
+  "engines": {
+    "node": ">=8.0.0"
+  },
+  "files": [
+    "build/src/**/*.js",
+    "build/src/**/*.d.ts",
+    "doc",
+    "LICENSE",
+    "README.md"
+  ],
+  "publishConfig": {
+    "access": "public"
+  },
+  "devDependencies": {
+    "@types/mocha": "^5.2.7",
+    "@types/nock": "^10.0.3",
+    "@types/node": "^12.6.9",
+    "codecov": "^3.6.1",
+    "gts": "^1.1.0",
+    "mocha": "^6.2.0",
+    "nock": "^11.0.0",
+    "nyc": "^14.1.1",
+    "rimraf": "^3.0.0",
+    "ts-mocha": "^6.0.0",
+    "ts-node": "^8.3.0",
+    "tslint-consistent-codestyle": "^1.15.1",
+    "tslint-microsoft-contrib": "^6.2.0",
+    "typescript": "3.7.2"
+  },
+  "dependencies": {
+    "@opentelemetry/base": "^0.3.1",
+    "@opentelemetry/core": "^0.3.1",
+    "@opentelemetry/tracing": "^0.3.1",
+    "@opentelemetry/types": "^0.3.1",
+    "google-auth-library": "^5.7.0",
+    "googleapis": "^46.0.0"
+  }
+}