feat: Migrate eShopWCFService from WCF/SOAP to Spring Boot 3.5 REST API

[devin-ai-integration]

Summary

Migrates the eShopModernizedNTier/src/eShopWCFService (.NET Framework 4.6.1 WCF SOAP service) to a Spring Boot 3.5 / Java 21 REST API at eShopModernizedNTier/src/eShopWCFService-SpringBoot/.

What was migrated

.NET Source	Spring Boot Target
[ServiceContract] / [OperationContract] (SOAP)	@RestController with 10 REST/JSON endpoints
EF6 DbContext + DbSet<T>	Spring Data JPA JpaRepository<T, ID> (5 repositories)
[DataContract] entity models (5)	JPA @Entity classes with Jakarta Validation
Web.config (WCF bindings, EF config)	application.yml + Spring profiles (dev/mock/prod)
CatalogServiceMock (in-memory)	@Profile("mock") service with preconfigured data
CatalogDBInitializer (EF seed)	Flyway migrations + DataInitializer (ApplicationRunner)
Autofac DI (ApplicationModule)	Spring @Configuration + @ConditionalOnProperty
Windows Container Dockerfile	Multi-stage eclipse-temurin:21 Dockerfile

REST API Endpoints (replacing WCF SOAP operations)

Method	Path	Replaces WCF Operation
GET	/api/catalog/items	GetCatalogItems(brandFilter, typeFilter)
GET	/api/catalog/items/{id}	FindCatalogItem(id)
POST	/api/catalog/items	CreateCatalogItem(item)
PUT	/api/catalog/items/{id}	UpdateCatalogItem(item)
DELETE	/api/catalog/items/{id}	RemoveCatalogItem(item)
GET	/api/catalog/brands	GetCatalogBrands()
GET	/api/catalog/types	GetCatalogTypes()
GET	/api/catalog/stock	GetAvailableStock(date, itemId)
POST	/api/catalog/stock	CreateAvailableStock(stock)
GET	/api/catalog/discounts	GetDiscount(date)

Architecture

• 21 Java source files across model/, repository/, service/, controller/, config/
• 3 tests passing (context load, security config GET, security config POST without CSRF)
• Flyway schema + seed data migrations for H2 (dev) — prod profile configured for SQL Server
• Spring Security with CSRF disabled for REST API, all endpoints public
• Actuator with health, metrics, info, prometheus endpoints
• Maven wrapper included for reproducible builds

Build status

• mvn clean compile — passes
• mvn test — 3/3 passing

Migration approach

Orchestrated via 3 parallel child Devin sessions:

1. Child A: JPA entities, repositories, Flyway migrations, data initializer
2. Child B: Service interfaces/impls, REST controller, exception handler
3. Child C: Security config, CORS, logging, Dockerfile, README

Review & Testing Checklist for Human

• Run the app locally: cd eShopModernizedNTier/src/eShopWCFService-SpringBoot && ./mvnw spring-boot:run -Dspring-boot.run.profiles=dev — verify it starts on port 8080 and responds to GET /api/catalog/items with 12 seed catalog items
• Verify mock profile: Run with -Dspring-boot.run.profiles=mock and confirm in-memory data is served correctly
• Test CRUD operations: POST a new catalog item with catalogBrandId/catalogTypeId, PUT to update via /api/catalog/items/{id}, DELETE to remove, verify correct HTTP status codes (201, 200, 204) and that brand/type associations are persisted
• Check stock and discount endpoints: GET /api/catalog/stock?date=2017-09-20&catalogItemId=1 should return 100; GET /api/catalog/discounts?date=2017-09-20 should return the matching discount
• Review entity mappings: Compare CatalogItem.java fields against CatalogItem.cs to ensure all properties (especially BigDecimal price with precision 19,4) are correctly mapped

Notes

• The original WCF service at eShopWCFService/ is preserved unchanged — this adds a new eShopWCFService-SpringBoot/ project alongside it
• The prod profile is configured for SQL Server (mssql-jdbc) to match the original WCF service's database; dev/mock use H2 in-memory
• The CatalogItemHiLoGenerator was intentionally dropped — replaced by @GeneratedValue(strategy = IDENTITY) which is simpler for the REST API use case
• The CatalogServiceClient (WCF SOAP proxy) was dropped as REST clients don't need generated proxies

Link to Devin session: https://partner-workshops.devinenterprise.com/sessions/87d7557cd1c24b5aa9788e3cc3a9d666
Requested by: @mbatchelor81

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