PakLog WMS/WES Documentation

Welcome to the PakLog Warehouse Management System (WMS) and Warehouse Execution System (WES) documentation. This comprehensive guide covers architecture, design patterns, implementation strategies, and operational procedures for our modern warehouse management platform.

Quick Navigation

System Overview

PakLog is a modern, microservices-based warehouse management platform that separates concerns between strategic warehouse management (WMS) and real-time execution (WES). Built with Java 21 and Spring Boot 3.2, the system leverages Domain-Driven Design principles and event-driven architecture.

Key Features

• Microservices Architecture: Modular, scalable services with clear boundaries
• Event-Driven Design: Apache Kafka for asynchronous communication
• Domain-Driven Design: Clear bounded contexts and aggregates
• Real-time Execution: WebSocket support for live updates
• Cloud Native: Kubernetes-ready with Istio service mesh
• Comprehensive Monitoring: Prometheus, Grafana, and distributed tracing

Technology Stack

Service Architecture

graph TB
    subgraph "WMS Services"
        WMS1[Wave Planning Service]
        WMS2[Location Master Service]
        WMS3[Workload Planning Service]
    end

    subgraph "WES Services"
        WES1[Task Execution Service]
        WES2[Pick Execution Service]
        WES3[Pack & Ship Service]
        WES4[Physical Tracking Service]
    end

    subgraph "Infrastructure"
        GW[API Gateway]
        MQ[Message Queue]
        DB[(Databases)]
        CACHE[(Redis Cache)]
    end

    Client[Client Applications] --> GW
    GW --> WMS1
    GW --> WES1
    WMS1 --> MQ
    MQ --> WES1
    WES1 --> DB
    WES1 --> CACHE

Documentation Structure

1. Architecture & Design Diagrams

Comprehensive technical diagrams covering:

• C4 Model architecture views
• Business process sequence diagrams
• Domain model representations
• State machine specifications
• Deployment and infrastructure layouts
• Data flow and integration patterns
• API specifications

2. Business Capabilities

Detailed documentation of business domains:

• Inventory Management: Stock control, adjustments, cycle counting
• Order Management: Order processing, allocation, fulfillment
• Cartonization: Packing optimization and container selection
• Product Catalog: SKU management and product attributes
• Shipment & Transportation: Carrier integration and tracking

3. Domain-Driven Design

DDD implementation for each bounded context:

• Aggregate definitions
• Entity and value object models
• Domain events
• Repository patterns
• Anti-corruption layers

4. Implementation Strategies

• WMS/WES Decoupling: Strangler Fig pattern implementation
• Detailed Plan: Sprint-by-sprint implementation roadmap
• System Overview: Quick reference and service catalog

Getting Started

For Developers

1. Review the Architecture Overview
2. Understand Domain Models
3. Check API Documentation
4. Follow the Implementation Plan

For Business Analysts

1. Start with Business Capabilities
2. Review Sequence Diagrams
3. Understand State Machines

For Architects

1. Study the Decoupling Strategy
2. Review Domain-Driven Design
3. Examine Infrastructure Design

Contributing

This documentation is maintained as part of the PakLog project. To contribute:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Submit a pull request

For questions or support, please contact the PakLog development team.