PakLog System Architecture Diagrams

This section contains comprehensive architecture diagrams for all PakLog services using the Mermaid.js architecture-beta syntax. These diagrams provide visual representations of system components, their relationships, and communication patterns.

📊 Architecture Diagrams Overview

Core System Architecture

• Overall System Architecture - Complete system overview showing all services and their interactions
• WMS Services Architecture - Warehouse Management System services
• WES Services Architecture - Warehouse Execution System services
• Shared Services Architecture - Common infrastructure and shared services
• Supporting Services Architecture - Additional business services

🏗️ Service Categories

WMS Services (Strategic Planning & Management)

Located in WMS Services Architecture:

• Order Management Service - Order lifecycle, validation, and prioritization
• Inventory Management Service - Stock control, reservations, and adjustments
• Wave Planning Service - Wave strategy, optimization, and release management
• Location Master Service - Warehouse layout, slotting, and capacity management
• Workload Planning Service - Labor planning, forecasting, and capacity calculation

WES Services (Real-time Execution)

Located in WES Services Architecture:

• Task Execution Service - Task orchestration, assignment, and tracking
• Pick Execution Service - Picking operations, path optimization, and put wall
• Pack & Ship Service - Packing stations, quality checks, and shipping integration
• Physical Tracking Service - License plates, RTLS, and movement tracking
• WES Orchestration Engine - Workflow management and service coordination

Shared Infrastructure Services

Located in Shared Services Architecture:

• Quality Management Service - Inspection, compliance, and defect management
• Location Tracking Service - Real-time location state synchronization
• Event Bus (Kafka) - Asynchronous messaging infrastructure
• Caching Layer (Redis) - Distributed caching and session management
• Authentication & Authorization - Identity management and access control

Supporting Business Services

Located in Supporting Services Architecture:

• Product Catalog Service - SKU management and product search
• Cartonization Service - Optimal packaging and box selection
• Shipment Transportation Service - Carrier integration and tracking
• Yard Management System - Gate operations and dock scheduling
• Returns Management Service - RMA processing and disposition

🔄 Communication Patterns

Synchronous Communication

• REST APIs for request-response operations
• gRPC for high-performance service-to-service calls
• GraphQL for flexible client queries

Asynchronous Communication

• Event-driven architecture using Apache Kafka
• CloudEvents specification for standardized event format
• Saga pattern for distributed transactions

Data Storage Patterns

• PostgreSQL for transactional data
• MongoDB for document storage
• Redis for caching and session management
• Time-series databases for metrics and tracking

🚀 Deployment Architecture

Container Orchestration

• Kubernetes for container management
• Istio service mesh for traffic management
• NGINX ingress controller

Monitoring & Observability

• Prometheus for metrics collection
• Grafana for visualization
• ELK stack for log aggregation
• Jaeger for distributed tracing

📖 How to Use These Diagrams

1. Understanding Components:
   • service(type) - Represents a service with its icon type
   • group(type) - Logical grouping of related services
   • Arrows show data flow and dependencies
2. Icon Types:
   • server - Application services
   • database - Data storage systems
   • queue - Message queues and event streams
   • cloud - External interfaces
   • disk - Business logic components
   • internet - External integrations
3. Connection Patterns:
   • T --> B - Top to Bottom
   • L --> R - Left to Right
   • B --> T - Bottom to Top
   • R --> L - Right to Left

🔗 Related Documentation

• Domain-Driven Design - DDD patterns and bounded contexts
• API Documentation - OpenAPI and AsyncAPI specifications
• WMS/WES Decoupling Strategy - Migration strategy
• Implementation Plan - Development roadmap

🎯 Key Design Principles

1. Service Autonomy - Each service owns its data and business logic
2. Event-Driven - Loosely coupled through asynchronous events
3. API-First - Well-defined contracts between services
4. Cloud-Native - Designed for containerized deployment
5. Observable - Built-in monitoring and tracing

📝 Notes

• These diagrams use the Mermaid.js architecture-beta syntax
• Diagrams are best viewed in tools that support Mermaid rendering
• For interactive exploration, use the Mermaid Live Editor
• Architecture is designed for horizontal scaling and high availability