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Exporting TracerBase as a separate @opencensus/nodejs-base package (#495)
* feat(opencensus-node): export base tracing * feat(nodejs-base): export TracerBase without CLS and default plugin loads * refactor(nodejs-base): address PR comments * refactor(nodejs-base): address PR comments * chore(nodejs): remove unused deps * test(nodejs-base): plugin laoder test refactors * test(nodejs-base): add back test/instrumentation folder * fix(nodejs-base): PR comments
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.gitignore

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# nodejs
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node_modules/
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!packages/opencensus-nodejs/test/instrumentation/node_modules
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!packages/opencensus-nodejs-base/test/instrumentation/node_modules
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npm-debug.log
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.nyc_output/
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build/

README.md

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npm install @opencensus/nodejs
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```
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Install OpenCensus Base without automatic instrumentation:
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```bash
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npm install @opencensus/nodejs-base
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```
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## Plugins
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OpenCensus can collect tracing data automatically using plugins. Users can also create and use their own plugins. Currently, OpenCensus supports automatic tracing for:
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/bin
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/coverage
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/doc
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/test
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# OpenCensus for Node.js Base
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[![Gitter chat][gitter-image]][gitter-url]
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OpenCensus Node.js Base is an implementation of OpenCensus, a toolkit for
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collecting application performance and behavior monitoring data.
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The library is in alpha stage and the API is subject to change.
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Please join [gitter](https://gitter.im/census-instrumentation/Lobby) for help or feedback on this project.
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## Installation
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Install OpenCensus Base with:
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```bash
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npm install @opencensus/nodejs-base
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```
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## Traces
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### Automatically Instrumenting an Application
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For automatic insturmentation see the
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[@opencensus/nodejs](https://github.com/census-instrumentation/opencensus-node/tree/master/packages/opencensus-nodejs)
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package.
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### Manually Instrumenting an Application
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With `@opencensus/nodejs-base` you have a full control over instrumentation and
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span creation. The base package doesn't load Continuation Local Storage (CLS)
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or any instrumentation plugin by default.
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```typescript
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const rootSpanOptions = { name: 'your root span' };
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tracing.tracer.startRootSpan(rootSpanOptions, (rootSpan) => {
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// You can create as many child spans as needed
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childSpan = tracing.tracer.startChildSpan({
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name: 'name of your child span'
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});
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// Do some operation...
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// Finish the child span at the end of it's operation
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childSpan.end();
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// Finish the root span at the end of the operation
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rootSpan.end();
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});
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```
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### Tracing Options
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See the `@opencensus/nodejs` package for the full API documentation.
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fixes:
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- "::packages/opencensus-nodejs-base/"

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