@livy/http-handler

This Livy handler sends log records to an HTTP endpoint using got.

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Synchronous logger support: no

Runtime: Node.js

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Basic Example

const { HttpHandler } = require('@livy/http-handler')

const handler = new HttpHandler('https://example.com/logs')

Installation

Install it via npm:

npm install @livy/http-handler

Options

The first argument to this handler's constructor determines where to send logs.

It is either

• the URL endpoint (as a string):

  new HttpHandler('https://example.com')

• a got options object:

  new HttpHandler({
    url: 'https://example.com/logs',
    method: 'post'
  })

• a callback creating one of the above from a log record (or an array of log records when batch-handling and allowBatchRequests is enabled):

  new HttpHandler(record => `https://example.com/logs/${record.channel}`)

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An object of options can be passed to the constructor as the second argument.

The following options are available:

allowBatchRequests

Type: boolean

Default: false

Description: Whether batch handling should send all pending records as an array in one request

bubble

Type: boolean

Default: true

Description: Controls whether records handled by this handler should bubble up to other handlers.

See also: Bubbling

level

Type: LogLevel

Default: 'debug'

Description: Controls which log records should be handled based on their log level.

requestOptions

Type: object | (record: LogRecord | LogRecord[]) => object

Default: false

Description: got options to use. May be the bare options object or a callback creating that object from a log record (or an array of log records when batch-handling and allowBatchRequests is enabled).

sequential

Type: boolean

Default: false

Description: Whether HTTP requests in batch handling must be executed sequentially instead of in parallel. This has no effect if allowBatchRequests is enabled.

Public API

bubble

Controls whether records handled by this handler should bubble up to other handlers. Initially set through the bubble option.

See also: Bubbling

level

The minimum log level of a log record to be considered by this handler. Initially set through the level option.

processors

This handler supports processors by implementing the ProcessableHandlerInterface.

reset()

This handler implements the ResettableInterface. Resetting it resets all attached processors.

You usually don't want to call this method manually on an individual handler. Consider calling it on the logger instead.