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HCL Commerce is a high-availability, highly scalable and customizable e-commerce platform. Able to support hundreds of thousands of transactions per day, HCL Commerce allows you to do business with consumers (B2C) or directly with businesses (B2B). HCL Commerce uses cloud friendly technology to make deployment and operation both easy and efficient. It provides easy-to-use tools for business users to centrally manage a cross-channel strategy. Business users can create and manage precision marketing campaigns, promotions, catalog, and merchandising across all sales channels. Business users can also use AI enabled content management capabilities.
Customizing
The topics in the Customizing section describe tasks performed by an application developer to customize HCL Commerce.
Functional architecture
Functional architecture provides both the set of patterns used to implement the business functionality and the frameworks in which these business functions execute.
HCL Commerce common architecture
Before examining how the Transaction server functions, it is useful to look at the larger picture of the software components that relate to HCL Commerce.
HCL Commerce functional overview
HCL Commerce functional architecture is based on a loose coupling of the presentation and business logic layers.
Design patterns
A variety of design patterns are used to develop the HCL Commerce framework. Any solution extending from HCL Commerce should adhere to these high-level design patterns.
Model-View-Controller (MVC) design pattern
Use the Model-View-Controller (MVC) design pattern to separate application data, presentation logic, and control information into distinct objects for HCL Commerce applications.

Documentation
HCL Commerce is a high-availability, highly scalable and customizable e-commerce platform. Able to support hundreds of thousands of transactions per day, HCL Commerce allows you to do business with consumers (B2C) or directly with businesses (B2B). HCL Commerce uses cloud friendly technology to make deployment and operation both easy and efficient. It provides easy-to-use tools for business users to centrally manage a cross-channel strategy. Business users can create and manage precision marketing campaigns, promotions, catalog, and merchandising across all sales channels. Business users can also use AI enabled content management capabilities.
- Getting started
  HCL Commerce has different advantages for business users, administrators and developers. HCL Commerce targets each of these roles with a tailored set of offerings so that each of your users can get maximum benefit.
- Installing and deploying
  Learn how to install and deploy HCL Commerce development environments and HCL Commerce production environments.
- Migrating
  Before you migrate to HCL Commerce Version 9.1, review this information to help plan and execute your migration.
- Operating
  Topics in the Operating category highlight tasks that are typically performed by business users, customer support representatives, to complete their day-to-day tasks in the operation of the HCL Commerce site.
- Integrating
  Topics in the Integrating category highlight the tasks that are commonly performed for using HCL Commerce in combination with other products.
- Administering
  Topics in the Administering category highlight tasks that are typically performed by the Site Administrator, to support daily operations of the HCL Commerce site.
- Customizing
  The topics in the Customizing section describe tasks performed by an application developer to customize HCL Commerce.
  - Customizing Management Center for HCL Commerce
    HCL Commerce allows you to pull the GIT bundle of Management Center source code and start the application locally to customize the Management Center.
  - Managed asset deployment
    Managed assets are files that are uploaded by business users to be used for store marketing, or to supplement products. They are added to HCL Commerce through the Assets tool or the Marketing tool in Management Center. By default, managed assets are extracted and deployed through the HCL Commerce EAR. To maintain performance in a large-scale production environment, site administrators must switch to alternative extraction and deployment methods for managed assets.
  - HCL Commerce development environment
    HCL Commerce Developer is the development toolkit for customizing a HCL Commerce application.
  - Functional architecture
    Functional architecture provides both the set of patterns used to implement the business functionality and the frameworks in which these business functions execute.
    - HCL Commerce common architecture
      Before examining how the Transaction server functions, it is useful to look at the larger picture of the software components that relate to HCL Commerce.
      - HCL Commerce runtime framework enhancements
        The runtime framework enhancements better enable support for multiple sales channels by further decoupling the presentation tier from the business logic tier. A sales channel is a method that a customer can use to purchase merchandise for example, in-store, from an online store, or from a call center.
      - HCL Commerce application layers
        Now that you have seen how the various software components related to HCL Commerce fit together, it is important to understand the application architecture. This understanding can help you to understand which parts are foundation layers and which parts you can modify.
      - HCL Commerce functional overview
        HCL Commerce functional architecture is based on a loose coupling of the presentation and business logic layers.
        HCL Commerce framework overview
        In HCL Commerce, the server runtime defines the framework for handling system and user requests, and performs the appropriate business logic to process the requests. The framework is built by using an MVC design pattern and provides an environment that hosts business logic and handles persistence. It performs such tasks as transaction management and session management.
        HCL Commerce framework interaction
        This section provides a summary of the interaction flow between components when forming a response to a request.
        Design patterns
        A variety of design patterns are used to develop the HCL Commerce framework. Any solution extending from HCL Commerce should adhere to these high-level design patterns.
        Model-View-Controller (MVC) design pattern
        Use the Model-View-Controller (MVC) design pattern to separate application data, presentation logic, and control information into distinct objects for HCL Commerce applications.
        Command design pattern
        Transaction server accepts requests from browser-based thin-client applications; and remote applications. For example, a request may come from a remote procurement system, or from another commerce server.
        Display design pattern
        Display pages return a response to a client. Typically, display pages are implemented as JSP pages.
    - Operational architecture
      Operational architecture includes the system design and topology and the non-functional requirements of the HCL Commerce system.
  - Persistent object model
    HCL Commerce deals with a large amount of persistent data. There are numerous tables defined in the current database schema. Even with this extensive schema, however, you might need to extend or customize the database schema for your particular business needs.
  - Creating your custom store
    After you install and set up your programming environment, you can create your custom store and customize your storefront. You must ensure that the store server is properly configured, and that your store assets are moved to the Store server.
  - Presentation layer
    HCL Commerce uses Java Server Pages (JSP) to implement the view layer of the Model-View-Controller (MVC) design pattern. The view layer is in charge of retrieving data from the database through the use of data beans and formatting it to meet the display requirements. The view layers determines whether the request is sent to a browser or streamed out as XML. JSP files present a clean separation between data content and presentation.
  - Controller layer
    The Controller layer is the conductor of operations for a request. It controls the transaction scope and manages the session related information for the request. The controller first dispatches to a command and then calls the appropriate view processing logic to render the response.
  - Business logic layer
    The business logic layer is the business components that provide OAGIS services to return data or start business processes. The presentation layer uses these OAGIS services to display data, or to invoke a business process. The business logic provides data required by the presentation layer. The business logic layer exists because more than just fetching and updating data is required by an application; there is also additional business logic independent of the presentation layer.
  - Persistence layer
    The interaction between the business objects and persistence layer is isolated in an object called the Business Object Mediator. Business object document (BOD) commands interact with the Business Object Mediator to handle the interaction with the logical objects and how they are persisted.
  - Business model information model
    A business model, a representation of the business processes used throughout the site, provides a sample commerce solution which includes an organization structure, default user roles and access control policies, one or more starter stores, administration tools, and business processes that demonstrate best practices. A business model can be customized to support business requirements and scenarios. HCL Commerce provides sample business models that show some common commerce solutions. These business models are created by setting up an organization hierarchy structure, access control policies, stores, and contracts that help satisfy the necessary business requirements.
  - Business models
    Before starting to develop your site with HCL Commerce, you need to determine the business model supported by HCL Commerce that best represents the purpose of your site. Usually sites created with HCL Commerce will be implemented based on of one of these business models.
  - Store data information model
    Store data is the information that is loaded into the Transaction server database, which allows your store to function. The URL Registry Entries and View Registry Entries packages are included in the diagram, but they are not database assets. These entries are presentation configuration (that is, struts actions and forwards) that must be deployed. URL registry entries are shown in the diagram to illustrate the entire store data information model. To operate properly, a store must have the data in place to support all customer activities. For example, in order for a customer to make a purchase, your store must contain a catalog of goods for sale (catalog data), the data associated with processing orders (tax and shipping data), and the inventory to fulfill the request (inventory and fulfillment data).
  - Customizing HCL Commerce
    You can extend the HCL Commerce product to fit your business needs. This topic describes the prerequisite skills and required knowledge that you need to customize business logic. After you have the required knowledge, use HCL Commerce Developer to take tutorials that guide you step-by-step through various customization scenarios.
  - Run Engine command framework
    The Run Engine command framework provides predefined commands, that you can use to change environment parameters or container configurations. This framework is built into the HCL provided Docker images.
  - GraphQL for HCL Commerce
    The GraphQL markup language is available for any API. It is a server-side interpreter for processing queries using a data type system you design. With GraphQL, your data and code are independent of any database or storage system.
  - Representational State Transfer (REST) services
    HCL Commerce uses Representational State Transfer (REST) services to provide a framework that can be used to develop RESTful applications on several platforms. These platforms can include web, mobile, kiosks, and social applications.
  - Web services
  - Search
    HCL Commerce comes with a powerful and fully integrated search function. The search functions in HCL Commerce provide an enriched customer experience, with features such as automatic search term suggestions and spelling correction. Since it is built on industry standards, HCL Commerce Search is highly flexible and extensible. Starter stores can use the search engine's most sophisticated features without requiring extra customization. Starting with Version 9.1, HCL Commerce Search with Elasticsearch microservices manage indexing and other crucial tasks, with no performance impact on the storefront or transaction server.
- Tutorials
  HCL Commerce provides many tutorials to help you customize and understand your HCL Commerce instance and stores.
- Samples
  Topics in the Samples category highlight the various samples that are provided with HCL Commerce.
- Compliance
  The following section describes how you can leverage HCL Commerce features and functionality to help your site be compliant with different privacy and security standards.
- Securing
  These topics describe the security features of HCL Commerce and how to configure these features.
- Performance
  Topics in the Performance section describe the means by which to plan, implement, test, and re-visit the optimization of HCL Commerce site performance.
- Troubleshooting
  Topics in the Troubleshooting section highlight common issues that are encountered with HCL Commerce, and how they can be addressed or mitigated.
- Reference
  Topics in the Reference section contain all of the HCL Commerce reference documentation.

Model-View-Controller (MVC) design pattern

Use the Model-View-Controller (MVC) design pattern to separate application data, presentation logic, and control information into distinct objects for HCL Commerce applications.

The MVC design pattern provides a structural framework that separates an application into three main components: the model, the view, and the controller. This separation simplifies application structure and encourages code reuse.

Model: Contains the application data. It does not contain logic regarding how data is presented to the user.
View: Presents the model data to the user. The view accesses the data but does not interpret the meaning of the data or the actions required to manipulate it.
Controller: Manages the interaction between the view and the model. It listens for events triggered by the view and executes the appropriate reaction, typically by calling a method on the model.

Because the view and model are connected through a notification mechanism, changes to the model are automatically reflected in the view. HCL Commerce applies this pattern to both web applications and rich clients by using the Struts or Web services frameworks.

Diagram illustrating how the MVC design pattern applies to HCL Commerce.