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Crop Deal: Microservices Farm-to-Dealer Platform Architecture

A technical case study on building a farm-to-dealer agricultural platform using Spring Boot microservices, Angular, and cloud-native design patterns.

#microservices#spring-boot#agriculture-tech#full-stack-development#software-architecture#system-design#java
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Pitch

CROP DEAL

A Microservices-Based Farm-to-Dealer Platform

Empowering Farmers | Connecting Dealers | Transforming Agriculture

Microservices Architecture Spring Boot Angular Cloud-Native
Case Study | Full Stack Microservices Implementation
Made byBobr AI

THE PROBLEM

Farmers struggle to get fair prices in traditional markets

High transportation costs to reach markets

Long wait times & unexpected commissions

Multiple intermediaries reduce farmer profits

Lack of price transparency

THE SOLUTION

A digital platform bridging Farmers and Dealers directly — eliminating middlemen, reducing costs, and ensuring transparent payments from farm itself.

Direct Farm-to-Dealer Connection
Transparent Digital Payments
Location-Based Crop Publishing
NO MORE MIDDLEMEN. NO HIDDEN COMMISSIONS. JUST FAIR TRADE.
Made byBobr AI

Microservices Architecture

Cloud-Native | Spring Boot | Spring Cloud

Client Layer
API Gateway Layer
Microservices Layer
Infrastructure Layer
Angular Web App
Mobile app
API Gateway
Spring Cloud Gateway and JWT Validation Layer
Auth Service
(JWT)
Auth DB (MySQL)
User Service
(Farmer / Dealer)
User DB (MySQL)
Crop Listing Service
(Catalog)
Crop DB (MongoDB)
Payment Service
(Transactions)
Payment DB (MySQL)
Notification Service
(Push & Events)
Notification DB (H2)
Eureka Service Registry
(Service Discovery)
Spring Cloud Config Server
(GitHub)
RabbitMQ
(Message Broker)
Zipkin
(Distributed Tracing)
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Use Case Diagram

Actors & System Interactions

CROP DEAL SYSTEM
Manage Farmers (Active/Inactive)
Manage Dealers
Generate Reports
Export Data
Federated Identity
Sign Up / Login
View / Edit Profile
Add Bank Account
Publish Crop Details
View Receipts
Subscribe for Crops
Make Payment
Generate Invoice
<<include>>
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Sequence Diagram

Crop Listing & Purchase Flow

Farmer App
API Gateway
Auth Service
Crop Service
Notification Service
Payment Service
Dealer App
1. POST /crops/publish
2. Validate JWT Token
3. Token Valid
4. Forward Request
5. Save Crop (MongoDB)
6. Publish Event (RabbitMQ)
7. Push Notif: "New Crop Available"
8. GET /crops/{id}
9. Fetch Crop Details
10. Return Crop Info
11. POST /payment/initiate
12. Process Payment
13. Save Transaction (Event Sourcing)
14. Update Crop Status = SOLD
15. Invoice Generated ✓
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USE CASE DIAGRAM

Actor Interactions & System Boundaries

CropDeal System
FARMER
DEALER
ADMIN
Publish Crop Details
Manage Bank Account
View Receipts
Edit Profile
Sign Up / Login
Federated Login (OAuth)
Subscribe to Crops
Make Payment
Generate Invoice
View Ratings
Manage Users
Generate Reports
View Analytics
Activate/Deactivate Users
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SEQUENCE DIAGRAM

Crop Listing & Payment Flow — Microservices Interaction

Angular UI
API Gateway
Auth Service
User Service
Crop Service
Payment Service
RabbitMQ
Notification Service
POST /auth/login (JWT Request)
Validate Credentials
Return JWT Token
200 OK + JWT
POST /crops/publish (+ JWT Header)
Validate JWT
Save Crop Listing
201 Created
Publish CropCreated Event
Notify Subscribed Dealers
POST /payment/initiate
Process Payment (Event Sourcing)
Transfer Funds via Feign Client
Publish PaymentSuccess Event
Send Receipt to Farmer
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ENTITY DIAGRAM

Database Schema — Microservice Databases

1:M receives
1:1 has
1:M makes
1:M publishes
1:1
1:1 generates
NOTIFICATION
notifId (PK)
userId (FK)
message
type
isRead
USER
userId (PK)
name
email
role
phone
status
BANK_ACCOUNT
accountId (PK)
userId (FK)
bankName
accountNumber
CROP_LISTING
cropId (PK)
farmerId (FK)
cropName
quantity
location
status
PAYMENT
paymentId (PK)
dealerId (FK)
cropId (FK)
amount
status
date
INVOICE
invoiceId (PK)
paymentId (FK)
totalAmount
generatedAt
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DESIGN PATTERNS

Patterns Implemented Across Microservices

SERVICE REGISTRY & DISCOVERY

Services auto-register with Eureka Server. Other services discover instances dynamically via Eureka Client, enabling load-balanced service-to-service calls.

Used in: All Microservices via Spring Cloud Eureka
EXTERNALIZED CONFIGURATION

All service configurations (DB URLs, ports, secrets) are centralized in a GitHub repo and served via Spring Cloud Config Server at startup.

Used in: Spring Cloud Config Server + GitHub
FEDERATED IDENTITY

Users authenticate via Email or Facebook OAuth2. JWT tokens are issued by the Auth Service and validated at the API Gateway for every request.

Used in: Auth Service — Spring Security + OAuth2 + JWT
CQRS
Command Query Responsibility Segregation

Read (query) operations for reports, invoices, and dashboards are separated from write (command) operations — enabling optimized querying across services.

Used in: Payment, Invoice & Admin Report Services
EVENT SOURCING

Payment transactions are stored as an immutable sequence of events. Each state change (INITIATED → PROCESSED → COMPLETED) is recorded and replayable via RabbitMQ.

Used in: Payment Service + RabbitMQ Event Bus
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TECH STACK & BEST PRACTICES

Implementation Standards & Tools Used

TECHNOLOGY STACK

Spring Boot 3.x — Microservice Framework
Spring Cloud Gateway — API Gateway
Spring Security + JWT — Authentication
Spring Cloud Eureka — Service Discovery
Spring Cloud Config + GitHub — Ext. Config
Feign Client — Service-to-Service Communication
RabbitMQ — Async Messaging (Event Sourcing)
MySQL / MongoDB / H2 — Independent DBs
Angular 17 — Web Frontend (TypeScript)
Zipkin — Distributed Tracing
Docker — Containerized Deployment
Swagger / OpenAPI 3 — API Documentation

BEST PRACTICES

✅ Lombok + SLF4J File Appender Logging
✅ JUnit 5 + Mockito — Unit Testing
✅ JaCoCo — 100% Code Coverage Target
✅ SonarQube Static Analysis (Zero High Issues)
✅ Global Exception Handling (@ControllerAdvice)
✅ Independent Database per Microservice
✅ Async/Parallel Design with RabbitMQ
✅ ALB Routing via API Gateway
✅ JWT Security on All Endpoints
✅ CQRS for Report & Invoice Queries
CROP DEAL — Empowering Farmers. Connecting Dealers. Built on Microservices.
Made byBobr AI
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Crop Deal: Microservices Farm-to-Dealer Platform Architecture

A technical case study on building a farm-to-dealer agricultural platform using Spring Boot microservices, Angular, and cloud-native design patterns.

CROP DEAL

A Microservices-Based Farm-to-Dealer Platform

Empowering Farmers | Connecting Dealers | Transforming Agriculture

Microservices Architecture

Spring Boot

Angular

Cloud-Native

Case Study | Full Stack Microservices Implementation

THE PROBLEM

Farmers struggle to get fair prices in traditional markets

High transportation costs to reach markets

Long wait times & unexpected commissions

Multiple intermediaries reduce farmer profits

Lack of price transparency

THE SOLUTION

A digital platform bridging Farmers and Dealers directly — eliminating middlemen, reducing costs, and ensuring transparent payments from farm itself.

Direct Farm-to-Dealer Connection

Transparent Digital Payments

Location-Based Crop Publishing

NO MORE MIDDLEMEN. NO HIDDEN COMMISSIONS. JUST FAIR TRADE.

Microservices Architecture

Cloud-Native | Spring Boot | Spring Cloud

Client Layer

Angular Web App

Mobile app

API Gateway Layer

API Gateway

Spring Cloud Gateway and JWT Validation Layer<br/>

Microservices Layer

Auth Service

(JWT)

Auth DB (MySQL)

User Service

(Farmer / Dealer)

User DB (MySQL)

Crop Listing Service

(Catalog)

Crop DB (MongoDB)

Payment Service

(Transactions)

Payment DB (MySQL)

Notification Service

(Push & Events)

Notification DB (H2)

Infrastructure Layer

Eureka Service Registry

(Service Discovery)

Spring Cloud Config Server

(GitHub)

RabbitMQ

(Message Broker)

Zipkin

(Distributed Tracing)

Use Case Diagram

Actors & System Interactions

CROP DEAL SYSTEM

Manage Farmers (Active/Inactive)

Manage Dealers

Generate Reports

Export Data

Sign Up / Login

Federated Identity

View / Edit Profile

Add Bank Account

Publish Crop Details

View Receipts

Subscribe for Crops

Make Payment

Generate Invoice

Sequence Diagram

Crop Listing & Purchase Flow

USE CASE DIAGRAM

Actor Interactions & System Boundaries

CropDeal System

FARMER

DEALER

ADMIN

Publish Crop Details

Manage Bank Account

View Receipts

Edit Profile

Sign Up / Login

Federated Login (OAuth)

Subscribe to Crops

Make Payment

Generate Invoice

View Ratings

Manage Users

Generate Reports

View Analytics

Activate/Deactivate Users

SEQUENCE DIAGRAM

Crop Listing & Payment Flow — Microservices Interaction

Angular UI

API Gateway

Auth Service

User Service

Crop Service

Payment Service

RabbitMQ

Notification Service

POST /auth/login (JWT Request)

Validate Credentials

Return JWT Token

200 OK + JWT

POST /crops/publish (+ JWT Header)

Validate JWT

Save Crop Listing

201 Created

Publish CropCreated Event

Notify Subscribed Dealers

POST /payment/initiate

Process Payment (Event Sourcing)

Transfer Funds via Feign Client

Publish PaymentSuccess Event

Send Receipt to Farmer

ENTITY DIAGRAM

Database Schema — Microservice Databases

USER

CROP_LISTING

PAYMENT

INVOICE

NOTIFICATION

BANK_ACCOUNT

1:M receives

1:1 has

1:M makes

1:M publishes

1:1

1:1 generates

DESIGN PATTERNS

Patterns Implemented Across Microservices

SERVICE REGISTRY & DISCOVERY

Services auto-register with Eureka Server. Other services discover instances dynamically via Eureka Client, enabling load-balanced service-to-service calls.

All Microservices via Spring Cloud Eureka

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EXTERNALIZED CONFIGURATION

All service configurations (DB URLs, ports, secrets) are centralized in a GitHub repo and served via Spring Cloud Config Server at startup.

Spring Cloud Config Server + GitHub

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FEDERATED IDENTITY

Users authenticate via Email or Facebook OAuth2. JWT tokens are issued by the Auth Service and validated at the API Gateway for every request.

Auth Service — Spring Security + OAuth2 + JWT

<path d="M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10z"></path><path d="M9 12l2 2 4-4"></path>

CQRS<br/><span style='font-size: 15px; font-weight: 600; opacity: 0.9;'>Command Query Responsibility Segregation</span>

Read (query) operations for reports, invoices, and dashboards are separated from write (command) operations — enabling optimized querying across services.

Payment, Invoice & Admin Report Services

<ellipse cx="12" cy="5" rx="9" ry="3"></ellipse><path d="M21 12c0 1.66-4 3-9 3s-9-1.34-9-3"></path><path d="M3 5v14c0 1.66 4 3 9 3s9-1.34 9-3V5"></path>

EVENT SOURCING

Payment transactions are stored as an immutable sequence of events. Each state change (INITIATED → PROCESSED → COMPLETED) is recorded and replayable via RabbitMQ.

Payment Service + RabbitMQ Event Bus

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TECH STACK & BEST PRACTICES

Implementation Standards & Tools Used

TECHNOLOGY STACK

BEST PRACTICES

Spring Boot 3.x — Microservice Framework

Spring Cloud Gateway — API Gateway

Spring Security + JWT — Authentication

Spring Cloud Eureka — Service Discovery

Spring Cloud Config + GitHub — Ext. Config

Feign Client — Service-to-Service Communication

RabbitMQ — Async Messaging (Event Sourcing)

MySQL / MongoDB / H2 — Independent DBs

Angular 17 — Web Frontend (TypeScript)

Zipkin — Distributed Tracing

Docker — Containerized Deployment

Swagger / OpenAPI 3 — API Documentation

Lombok + SLF4J File Appender Logging

JUnit 5 + Mockito — Unit Testing

JaCoCo — 100% Code Coverage Target

SonarQube Static Analysis (Zero High Issues)

Global Exception Handling (@ControllerAdvice)

Independent Database per Microservice

Async/Parallel Design with RabbitMQ

ALB Routing via API Gateway

JWT Security on All Endpoints

CQRS for Report & Invoice Queries

CROP DEAL — Empowering Farmers. Connecting Dealers. Built on Microservices.

  • microservices
  • spring-boot
  • agriculture-tech
  • full-stack-development
  • software-architecture
  • system-design
  • java