pomegranate-task-utilities/lib/TaskWriter/RMQWriter.js

Adds Utility methods to compliment pomegranate-task-runner actions.

/**
 * @file RMQWriter
 * @author Jim Bulkowski <jim.b@paperelectron.com>
 * @project Pomegranate-task-utilities
 * @license MIT {@link http://opensource.org/licenses/MIT}
 */

'use strict';
const Promise = require('bluebird')
/**
 *
 * @module RMQWriter
 */

class RMQWriter {
  constructor(config, channel){
    this.channel = channel
    this.propName = config.propName
    this.type = config.type
    this.msgOptions = config.msgOptions || null
  }

  getType(){
    return this.type
  }

  rpc(){
    Promise.reject(new Error('The .rpc method can only be called from a RPC enabled queue.'))
  }

  publish(){
    Promise.reject(new Error('The .publish method can only be called from an Exchange'))
  }

  writeToQueue(queuename, msg, options){
    return Promise.try(() => {
      let strung = JSON.stringify(msg)
      let buf = Buffer.from(strung)
      let localOptions = options || this.msgOptions
      return this.channel.sendToQueue(queuename, buf, localOptions)
    })
  }

  write(msg, options){
    return this.writeToQueue(this.queue, msg, options)
  }
}

module.exports = RMQWriter