# API

The library exposes a function to write directly to Papertrail from your own application. The example below shows how this can be done using [pino-multi-stream](https://github.com/pinojs/pino-multi-stream).

Example:

```js
const papertrail = require('pino-papertrail')

const pinoms = require('pino-multi-stream')
// create the papertrail destination stream
const options = require('./options.json')
const appname = 'my-project'
const writeStream = papertrail.createWriteStream({ ...options, appname })
// create pino loggger
const logger = pinoms({ streams: [{ stream: writeStream }] })
// log some events
logger.info('Informational message')
logger.error(new Error('things got bad'), 'error message')
```

## Functions

### createWriteStream

The `createWriteStream` function creates a writestream that `pino-multi-stream` can use to send logs to.

Example:

```js
const writeStream = papertrail.createWriteStream({
  ...require('/options.json'),
  appname: 'my-project'
})
````

## Options

You can pass the following properties in an options object:

| Property                                                | Type              | Description                                         |
|---------------------------------------------------------|-------------------|-----------------------------------------------------|
| appname (default: pino)                                 | string            | Application name                                    |
| host (default: localhost)                               | string            | Papertrail destination address                      |
| port (default: 1234)                                    | number            | Papertrail destination port                         |
| connection (default: udp)                               | string            | Papertrail connection method (tls/tcp/udp)          |
| echo (default: true)                                    | boolean           | Echo messages to the console                        |
| message-only (default: false)                           | boolean           | Only send msg property as message to papertrail     |
| backoff-strategy (default: `new ExponentialStrategy()`) | [BackoffStrategy] | Retry backoff strategy for any tls/tcp socket error |

[BackoffStrategy]: https://github.com/MathieuTurcotte/node-backoff#interface-backoffstrategy