# OpenTelemetry Hapi Instrumentation for Node.js

[![NPM Published Version][npm-img]][npm-url]
[![Apache License][license-image]][license-image]

This module provides automatic instrumentation for the [Hapi Framework](https://hapi.dev)(`@hapi/hapi`)package.

If total installation size is not constrained, it is recommended to use the [`@opentelemetry/auto-instrumentations-node`](https://www.npmjs.com/package/@opentelemetry/auto-instrumentations-node) bundle with [@opentelemetry/sdk-node](`https://www.npmjs.com/package/@opentelemetry/sdk-node`) for the most seamless instrumentation experience.

Compatible with OpenTelemetry JS API and SDK `1.0+`.

## Status

| Maturity                                           | [Component Owner](../../.github/component_owners.yml) | Compatibility         |
|----------------------------------------------------|-------------------------------------------------------|-----------------------|
| [Unmaintained](../../CONTRIBUTING.md#unmaintained) | N/A                                                   | API 1.0+<br/>SDK 1.0+ |

## Installation

```bash
npm install --save @opentelemetry/instrumentation-hapi
```

### Supported Versions

- [`@hapi/hapi`](https://www.npmjs.com/package/@hapi/hapi) versions `>=17.0.0 <22`

## Usage

OpenTelemetry Hapi Instrumentation allows the user to automatically collect trace data and export them to their backend of choice, to give observability to distributed systems.

To enable a specific instrumentation, pass it to `registerInstrumentations()`.
This is commonly done via `NodeSDK` for fully setting up all OpenTelemetry SDK components:

```js
const { NodeSDK } = require('@opentelemetry/sdk-node');
const { HapiInstrumentation } = require('@opentelemetry/instrumentation-hapi');

const sdk = new NodeSDK({
  instrumentations: [
    new HapiInstrumentation(),
  ],
});
sdk.start();
process.once('beforeExit', async () => { await sdk.shutdown(); });
```

<!--
The dev dependency of `@hapi/podium@4.1.1` is required to force the compatible type declarations. See: https://github.com/hapijs/hapi/issues/4240
-->

## Hapi Instrumentation Support

This package provides automatic tracing for hapi server routes and [request lifecycle](https://github.com/hapijs/hapi/blob/master/API.md#request-lifecycle) extensions defined either directly or via a Hapi plugin.

## Semantic Conventions

This instrumentation creates spans that include HTTP-related data as span attributes.

The `instrumentation-hapi` versions 0.66.0 and later emit the stable v1.23.0+ semantic conventions.

### Attributes collected

The following semconv attributes are collected on hapi route spans:

| v1.23.0 semconv       | Notes                                       |
|-----------------------|---------------------------------------------|
| `http.request.method` | HTTP request method                         |
| `http.route`          | Route assigned to handler. Ex: `/users/:id` |

## 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-contrib/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/instrumentation-hapi
[npm-img]: https://badge.fury.io/js/%40opentelemetry%2Finstrumentation-hapi.svg