Extending the Spryker Core functionality

To extend the Spryker-Core functionality and to use the Spryker Engine to develop a project, it’s important to understand the folder structure used in Spryker Commerce OS.

The project consists of two parts : Spryker Core and Project implementation. They both follow the same structure and the project implementation goes on top of the Spryker Core functionalities.

The picture below shows how a request is being handled:

Project Structure Overview

The code is divided into three parts:

• src/ folder contains the code of the current project
• vendor/spryker/ folder contains the Spryker OS
• vendor/spryker-eco/ folder contains the Spryker Ecosystem modules, which are distributed separately from core
• vendor/spryker-sdk/ folder contains the development tools
• vendor/spryker-shop/ folder contains the Shop App (Yves)

All projects, SprykerCore and SprykerEco parts follow a very similar directory structure:

For example, if CustomerFacade is extended on the project side, it will have the following locations and namespaces:

in Spryker Core :

• location: vendor/spryker/customer/src/Spryker/Zed/Customer/Business
• namespace: Spryker\Zed\Customer\Business

on the Project layer :

• location: src/Pyz/Zed/Customer/Business
• namespace: Pyz\Zed\Customer\Business

As it can be observed from the example above, the location of the file reflects the namespace its located in.

SprykerEco modules can be treated as Spryker Core in the context of replacing.

Folder organization

Depending on where and how the code is intended to be used, it can be placed in one of the following folders :

• Client - the code placed in here handles communication between Yves and Zed
• Shared - the code placed in here is used both by Yves and Zed ( to avoid code duplication)
• Zed - the code in here is meant only for the backend application
• Yves - the frontend code
• Glue - the code placed in here handles communication between Glue API and Client

Each module contains one folder for every layer of the application :

• Business
• Communication
• Persistence
• Presentation

Extending SprykerCore Functionality

To extend the functionality of a class from SprykerCore, a new class with the same name must be added to the corresponding location on the project side.

Replacement rules, described in the Extending the Core article work for the next classes in Spryker module:

• Facade
• BusinessFactory
• Controller
• QueryContainer
• DependencyProvider
• Config

The example below illustrates how CategoryFacade can be extended on the project side:

Spryker Core:

<?php

namespace Spryker\Zed\Category\Business;

use Spryker\Zed\Kernel\Business\AbstractFacade;

class CategoryFacade extends AbstractFacade
{
  ...
}

Project:

<?php

namespace Pyz\Zed\Category\Business;

use Spryker\Zed\Category\Business\CategoryFacade as SprykerCategoryFacade;

class CategoryFacade extends SprykerCategoryFacade
{
  ...
}