National Preventative Mechanism

    thread-stream

    0.13.1 • Public • Published

    thread-stream

    npm version Build Status Known Vulnerabilities Coverage Status js-standard-style

    A streaming way to send data to a Node.js Worker Thread.

    install

    npm i thread-stream

    Usage

    'use strict'
    
    const ThreadStream = require('thread-stream')
    const { join } = require('path')
    
    const stream = new ThreadStream({
      filename: join(__dirname, 'worker.js'),
      workerData: { dest },
      workerOpts: {}, // Other options to be passed to Worker
      sync: false, // default
    })
    
    stream.write('hello')
    
    // Asynchronous flushing
    stream.flush(function () {
      stream.write(' ')
      stream.write('world')
    
      // Synchronous flushing
      stream.flushSync()
      stream.end()
    })

    In worker.js:

    'use strict'
    
    const fs = require('fs')
    const { once } = require('events')
    
    async function run (opts) {
      const stream = fs.createWriteStream(opts.dest)
      await once(stream, 'open')
      return stream
    }
    
    module.exports = run

    Make sure that the stream emits 'close' when the stream completes. This can usually be achieved by passing the autoDestroy: true flag your stream classes.

    The underlining worker is automatically closed if the stream is garbage collected.

    External modules

    You may use this module within compatible external modules, that exports the worker.js interface.

    const ThreadStream = require('thread-stream')
    
    const modulePath = require.resolve('pino-elasticsearch')
    
    const stream = new ThreadStream({
      filename: modulePath,
      workerData: { node: 'http://localhost:9200' }
    })
    
    stream.write('log to elasticsearch!')
    stream.flushSync()
    stream.end()

    This module works with yarn in PnP (plug'n play) mode too!

    License

    MIT

    Install

    npm i thread-stream

    DownloadsWeekly Downloads

    388,126

    Version

    0.13.1

    License

    MIT

    Unpacked Size

    48.4 kB

    Total Files

    37

    Last publish

    Collaborators

    • davidmarkclements
    • matteo.collina
    • jsumners
    • watson