Software Business Layer

A Software Business Layer is a software architecture layer that implements business logic (to support business processes through rule processing).

• AKA: Domain Layer, Logic Layer, Process Layer.
• Context:
  • It can typically process Business Rules through rule engines.
  • It can typically execute Business Transactions through transaction managers.
  • It can typically validate Business Data through validation engines.
  • It can typically maintain Business State through state managers.
  • It can typically enforce Business Constraints through constraint checkers.
  • ...
  • It can often implement Workflow Processing through workflow engines.
  • It can often provide Decision Making through decision engines.
  • It can often manage Business Events through event processors.
  • It can often support Domain Logic through domain services.
  • ...
  • It can range from being a Simple Process Engine to being a Complex Rule Engine, depending on its logic complexity.
  • It can range from being a Sequential Processor to being a Parallel Processor, depending on its processing pattern.
  • It can range from being a Stateless Service to being a Stateful Service, depending on its state management.
  • ...
  • It can integrate with Persistence Layer for data access.
  • It can connect to External System for business integration.
  • It can utilize Business Framework for logic development.
  • ...
• Examples:
  • Banking Systems, such as:
    • Transaction Managers for payment processing.
    • Account Services for account management.
    • Fraud Detections for risk management.
  • E-commerce Systems, such as:
    • Order Processors for order management.
    • Inventory Services for stock management.
    • Pricing Engines for price calculation.
  • Workflow Systems, such as:
    • Process Engines for business workflows.
    • Rule Engines for business rules.
    • Decision Engines for business decisions.
  • ...
• Counter-Examples:
  • Data Access Layer, which handles data persistence rather than business logic.
  • User Interface Layer, which manages user interaction rather than process execution.
  • Infrastructure Layer, which provides technical services rather than business services.
• See: Business Process Pattern, Domain Logic Pattern, Transaction Processing Pattern, Business Rule Engine.

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