prisme-flow/nodes/bridge/avro/object_to_avro.js

prisme platform flow engine

/**
 * Created by prisme.io on 09/06/2017.
 */

module.exports = function (RED) {
  var avro = require('avro-js')

	/*
	 * Avro Converter Node
	 *
	 * Converts JSON to Avro and Avro to JSON.
	 */
  function kafkaProducerNode (config) {
    RED.nodes.createNode(this, config)

    this.schema = config.schema

    var type = avro.parse(this.schema)

    var node = this

    try {
      this.on('input', function (msg) {
        if (typeof (msg.payload) === 'object') {
          if (type.isValid(msg.payload)) {
            msg.payload = type.toBuffer(msg.payload)
            node.send(msg)
          } else {
            node.error('Object does not match provided Avro schema: ' + msg.payload)
          }
        } else {
          node.error('Payload is not an object:' + msg.payload)
        }
      })
    } catch (e) {
      node.error(e)
    }
  }
  RED.nodes.registerType('object to avro', kafkaProducerNode)
}