hsenasilva/sample-cqrs

This system is a CQRS-based application that separates command and query responsibilities into distinct services. The command server handles state-changing operations and long-running processes using the Axon framework, while the query server manages read operations and data retrieval. It relies on MongoDB for persistence and Kafka for messaging, exposing REST APIs for both commands and queries.

The command-server module now implements a Command-Query Responsibility Segregation (CQRS) architecture using the Axon Framework. This includes a new Spring Boot application entry point, an aggregate root (SampleAggregate) handling Create and Cancel commands, and a saga (SampleSaga) for long-running process coordination. The server exposes a REST API at /samples via CommandController, which validates incoming requests and dispatches commands through the Axon command bus. Configuration is provided for MongoDB event storage, Kafka messaging, and Jackson serialization, with CORS headers explicitly set to allow cross-origin requests.

command-server · high confidence

Added new files defining the core domain models and events for the CQRS sample application. The changes introduce a base SampleEvent class and specific event types (CreatedSampleEvent, CanceledCreateSampleEvent) alongside domain models including SampleId, Sample, SampleAction, and SampleStatus. These files establish the foundational data structures for the sample's command and query handling.

sample-core · high confidence

The query-server module is introduced, providing a Spring Boot application that exposes a REST API for retrieving sample data. It includes configuration for Axon (event handling, Kafka integration), MongoDB, and CORS headers. The server listens on port 8085 at the /query-sample/api context path, serving GET requests for /samples/{id} and processing domain events (RequestedSampleEvent, CreatedSampleEvent, CanceledCreateSampleEvent) to update the MongoDB repository.

query-server · high confidence

A change to existing behaviour in classes — 1 commit, 1 file.

classes · low confidence · unverified

The project's Maven build configuration has been updated across four POM files (root, command-server, query-server, and sample-core). Key changes include upgrading the Gson library to version 2.8.9 in the query-server module, adding the sample-core module, and updating various dependency versions and repository configurations to support the new multi-module CQRS architecture.

(dependencies) · high confidence

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

• CAI 56 → 46 (-10.0)
• Rubric changed (rubric-2026.08.19 → rubric-2026.09.15) — scores are not directly comparable.

• Code Health 100 → 99 (-0.6)
• Architecture 48 (new)
• Maturity 76 → 76 (+0.0)
• Readiness 18 → 18 (+0.0)
• Security 100 → 97 (-2.9)
• Domain Modelling 100 → 100 (+0.0)
• Event Sourcing 100 → 100 (+0.0)

• Dependency hygiene not measured — dependency manifest found but not parsed for hygiene
• Duplicated block (5 lines × 3) (query-server/src/main/kotlin/hsenasilva/com/github/sample/cqrs/listener/SampleEventHandler.kt)
• No exposed public API
• Scanner failed to run — not a clean result
• change coupling unreadable for .kt — no production change history could be paired for this repository's own source
• early-stage repository — too few commits for a meaningful bus factor
• early-stage repository — too little history to judge knowledge freshness

• Dependency hygiene PARTLY measured — Maven/Gradle declarations read, no dependency graph resolved
• Documentation: no installation or build instructions (README.md)
• Documentation: no usage examples (README.md)
• Duplicated block (15 lines × 2) (command-server/src/main/kotlin/hsenasilva/com/github/sample/cqrs/configuration/CorsConfiguration.kt)
• Duplicated block (5 lines × 3) (query-server/src/main/kotlin/hsenasilva/com/github/sample/cqrs/listener/SampleEventHandler.kt)
• High IaC: WD-COMPOSE-0002 (docker-compose.yml)
• High IaC: WD-COMPOSE-0002 (docker-compose.yml)
• Medium IaC: WD-COMPOSE-0002 (docker-compose.yml)
• Medium IaC: WD-COMPOSE-0002 (docker-compose.yml)
• Scanner failed to run — not a clean result
• Scanner failed to run — not a clean result

Written by watchdog.canine.dev from the codebase's own history, inside the signed delivery this page is composed from.

hsenasilva/sample-cqrs was measured the same way every project in this corpus was: the same rubric, at a pinned commit, with the result published in full. Point a surveyor at a repository you know and see whether you agree with it.