proc-that

proc(ess)-that - easy extendable etl tool for nodejs written in typescript.

Basically instantiate the Etl class and add extractors (which pull data from a datasource), transformers (which process the extracted data) and loaders (they load the results into a sink).

A basic, hypothetic example could be: "Load data from a JSON array, snake_case all properties and store those objects into a mongoDB."

The package is written in typescript but can be used in plain javascript as well

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Usage

import { Etl } from "proc-that";

new Etl()
  .addExtractor(/* class that implements Extractor */)
  .addTransformer(/* class that implements Transformer */)
  .addLoader(/* class that implements Loader */)
  .start()
  .subscribe(progress, error, success);

After all objects are extracted, transformed and loaded, the .start() observable completes and the process is finished.

Below is a list if extractors and loaders that are already implemented. Feel free to implement your own extractor / transformer / loader and contribute it to this list with a PR.

Extractors

| Name | Description | Link | | -------------------------- | --------------------------------- | ---------------------------------------------------- | | proc-that-rest-extractor | Extract objects from GET requests | https://github.com/smartive/proc-that-rest-extractor |

Loaders

| Name | Description | Link | | -------------------------- | ------------------------------------------- | ---------------------------------------------------- | | proc-that-elastic-loader | Load transformed objects into elasticsearch | https://github.com/smartive/proc-that-elastic-loader |

Implement your own

To ease up implementing your own extractors / transformers or loaders, just create a new repository and install proc-that as a dev-dependency. This package contains the needed definition files for the interfaces you need to create the extensions.