ETL Framwork

Create simple imports with the Extract, Transform, Load pattern.

Installation

composer require camillebaronnet/php-etl

Usage

This example extract some Github's repositories, apply some transformations

<?php

use Camillebaronnet\ETL\Etl;
use Camillebaronnet\ETL\Extractor\Http;
use Camillebaronnet\ETL\Loader\DebugLoader;
use Camillebaronnet\ETL\Transformer\DateTime;
use Camillebaronnet\ETL\Transformer\Decode;
use Camillebaronnet\ETL\Transformer\Flatten;
use Camillebaronnet\ETL\Transformer\Map;
use Camillebaronnet\ETL\Transformer\Sleep;

$etl = (new Etl)
    ->extract(Http::class, ['url' => 'https://api.github.com/users/camillebaronnet/repos'])
    ->add(Decode::class)
    ->add(Sleep::class, ['seconds' => .2])
    ->add(Flatten::class, ['glue' => '_'])
    ->add(Map::class, [
        'fields' => [
            'id',
            'name',
            'full_name' => 'fullName',
            'owner_login' => 'ownerLogin',
            'owner_url' => 'ownerUrl',
            'url',
            'ssh_url' => 'sshUrl',
            'created_at' => 'createdAt'
        ]
    ])
    ->add(DateTime::class, [
        'fields' => ['createdAt'],
        'from' => 'Y-m-d\TH:i:s\Z',
        'to' => 'd/m/Y',
    ])
;

$etl->process(DebugLoader::class);

The process explained

• EXTRACT : Extract can output one or more items

• TRANFORM : A transform step takes the result of the previous step (extractor or transformer) apply an operation and optionally split the input into several subsets of items (example with Decode).

• LOADER : A loader can by placed at the end of the pipeline or between transformers. Several Loader can be setting up.

Collection

Extractors

Name	Description
HTTP	Simple wrapper for the libCurl

Transformers

Name	Description
Decode	Decode JSON, YAML, XML, CSV and more using Symfony's DecoderInterface
Map	Rename, keep and remove some fields
Flatten	Flattens a multi-dimensional collection into a single dimension
Trim	Strip whitespace from the beginning and end of a string
Sleep	Delay execution
DateTime	Parse/Convert dates

Loaders

Name	Description
Debug	Display items in output

Extendable

You can easily create your own custom Extractors, Transformers, Loader or Strategy by implementing the corresponding interface.

• ExtractInterface
• TransformInterface
• LoaderInterface

Submit yours. Send a pull-request