PakLog Services - Class Diagrams Index

This directory contains comprehensive class diagrams for all PakLog services, organized by service domains. Each diagram uses Mermaid syntax to illustrate the object-oriented design, domain models, and relationships between classes.

📚 Service Class Diagrams

WMS (Warehouse Management System) Services

Order Management Service

• Domain Model: Order aggregate, OrderLine, Customer, Address, ShippingMethod
• State Management: Order state machine and transitions
• Command/Query Handlers: CQRS implementation
• Repository Pattern: Data persistence and event sourcing
• Domain Events: Order lifecycle events
• Integration Services: External system connectors
• Business Rules: Order policies and strategies

Inventory Service

• Domain Model: InventoryItem, Reservation, Movement, Adjustment
• Tracking & Valuation: Lot tracking, ABC analysis, cycle counting
• Allocation System: Reservation management and strategies
• Command/Query Handlers: Inventory operations
• Repository & Persistence: Event store and projections
• Domain Events: Inventory state changes
• Integration: ERP sync, replenishment, analytics

Wave Planning Service

• Domain Model: Wave aggregate, WavePlan, WaveRule, CarrierCutoff
• Optimization Engine: Wave optimization algorithms
• Release Management: Wave release and scheduling
• Command/Query Handlers: Wave operations
• State Machine: Wave status transitions
• Domain Events: Wave lifecycle events
• Business Rules: Wave strategies and selection

Location Master Service

• Domain Model: LocationMaster, Hierarchy, Capacity, Attributes
• Configuration Management: Templates and zone configuration
• Slotting Optimization: ABC analysis and velocity-based slotting
• Validation & Rules: Business rules and compliance
• Maintenance: Audits and history tracking
• Domain Events: Location configuration events
• Integration: ERP, CAD, IoT sensors

WES (Warehouse Execution System) Services

Task Execution Service

• Domain Model: WorkTask, TaskInstruction, TaskQueue
• Assignment Engine: Task assignment strategies
• Task Orchestration: Coordination and dispatching
• Command/Query Handlers: Task operations
• Execution Tracking: Performance metrics and audit
• Domain Events: Task lifecycle events
• Integration: Mobile API and operator management

Pick Execution Service

• Domain Model: PickSession, PickList, PickLine, PickPath
• Path Optimization: TSP algorithms and optimization strategies
• Batch & Zone Picking: Batch management and put wall
• Confirmation & Validation: Pick validation and shortage handling
• Mobile Interface: Voice picking, RF scanner, AR navigation
• Performance Analytics: Metrics and heat map analysis
• Domain Events: Pick execution events

Pack & Ship Service

• Domain Model: PackingSession, PackItem, Carton, ShippingLabel
• Cartonization Engine: Packing algorithms and optimization
• Shipping Integration: Multi-carrier adapters
• Quality Control: Inspection and compliance validation
• Station Management: Equipment and resources
• Command/Event Handling: Packing operations
• Performance Analytics: Efficiency analysis

Physical Tracking Service

• Domain Model: LicensePlate, Movement, PhysicalInventory
• RTLS Integration: Real-time location tracking
• Movement Orchestration: Transfer and consolidation
• Location State Management: State tracking and capacity
• Audit & Tracking: Chain of custody
• Domain Events: Movement and state change events
• Integration: Warehouse mapping and sensors

WES Orchestration Engine

• Workflow Model: WorkflowDefinition, WorkflowInstance, Steps
• Orchestration Engine: Execution and state management
• Saga Pattern: Distributed transaction management
• Service Registry: Service discovery and load balancing
• Monitoring: Metrics, tracing, and alerts
• Error Handling: Retry, circuit breaker, compensation
• Domain Events: Workflow lifecycle events

Supporting Services

Product Catalog Service

• Domain Model: Product, ProductVariant, ProductCategory
• Search & Discovery: Search engine and recommendations
• Information Management: Enrichment and validation
• Category & Taxonomy: Hierarchy management
• Pricing & Promotions: Dynamic pricing strategies
• Media Management: Assets and content
• Integration & Events: Product lifecycle events

Cartonization Service

• Domain Model: CartonizationRequest, Item, Carton, Result
• Packing Algorithms: 3D bin packing strategies
• Optimization Engine: Multi-objective optimization
• Carton Selection: Library and custom design
• Simulation & Testing: 3D visualization and stress testing
• Analytics: Performance metrics and recommendations
• Integration & Events: Cartonization events

🎯 Design Patterns Used

Domain-Driven Design Patterns

• Aggregate Root: Consistency boundaries
• Entity: Objects with identity
• Value Object: Immutable objects
• Domain Service: Business logic
• Repository: Data access abstraction
• Factory: Complex object creation
• Specification: Business rule encapsulation

Architectural Patterns

• CQRS: Command Query Responsibility Segregation
• Event Sourcing: Event-based state management
• Saga: Distributed transaction management
• Strategy: Algorithmic flexibility
• Observer: Event-driven communication
• Adapter: External system integration
• Circuit Breaker: Fault tolerance

Object-Oriented Principles

• SOLID Principles: Design principles adherence
• Encapsulation: Data hiding and abstraction
• Inheritance: Type hierarchies
• Polymorphism: Interface-based design
• Composition: Object composition over inheritance

📊 Class Diagram Notation

Mermaid Class Diagram Syntax

• <<Interface>>: Interface stereotype
• <<Abstract>>: Abstract class
• <<Enumeration>>: Enumeration type
• <<Service>>: Service class
• <<Entity>>: DDD Entity
• <<Value Object>>: DDD Value Object
• <<Aggregate Root>>: DDD Aggregate Root

Relationships

• -->: Association
• --|>: Inheritance
• ..|>: Interface implementation
• ..>: Dependency
• "1" --> "*": One-to-many relationship

🔗 Navigation

By Service Type

• WMS Services: Strategic planning and management
• WES Services: Real-time execution
• Supporting Services: Cross-cutting concerns

By Domain

• Order Management: Order lifecycle
• Inventory: Stock control and tracking
• Warehouse Operations: Picking, packing, shipping
• Product Information: Catalog and pricing
• Logistics: Transportation and delivery

By Pattern

• Domain Models: Core business entities
• Command Handlers: Write operations
• Query Handlers: Read operations
• Event Handlers: Asynchronous processing
• Integration Services: External systems

📝 Usage Guidelines

1. Understanding the Diagrams
   • Start with the Domain Model Overview for each service
   • Review the relationships between entities
   • Understand the command and event flow
2. Implementation Reference
   • Use class diagrams as implementation blueprints
   • Follow the defined interfaces and contracts
   • Maintain consistency with domain models
3. Extension Points
   • Strategy interfaces for algorithm flexibility
   • Event handlers for system integration
   • Repository interfaces for data access
4. Best Practices
   • Keep aggregates small and focused
   • Use value objects for immutable data
   • Implement domain services for complex logic
   • Maintain clear boundaries between services