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Author SHA1 Message Date
Christoph Wagner
a489c15cf5 feat: Add complete HSP implementation with integration tests passing 
Initial implementation of HTTP Sender Plugin following TDD methodology
  with hexagonal architecture. All 313 tests passing (0 failures).

  This commit adds:
  - Complete domain model and port interfaces
  - All adapter implementations (HTTP, gRPC, file logging, config)
  - Application services (data collection, transmission, backpressure)
  - Comprehensive test suite with 18 integration tests

  Test fixes applied during implementation:
  - Fix base64 encoding validation in DataCollectionServiceIntegrationTest
  - Fix exception type handling in IConfigurationPortTest
  - Fix CompletionException unwrapping in IHttpPollingPortTest
  - Fix sequential batching in DataTransmissionServiceIntegrationTest
  - Add test adapter failure simulation for reconnection tests
  - Use adapter counters for gRPC verification

  Files added:
  - pom.xml with all dependencies (JUnit 5, Mockito, WireMock, gRPC, Jackson)
  - src/main/java: Domain model, ports, adapters, application services
  - src/test/java: Unit tests, integration tests, test utilities
 2025-11-20 22:38:55 +01:00
Christoph Wagner
290a3bc99b docs: add implementation plan with TDD methodology and architectural decisions 
Create comprehensive project implementation plan and document architectural
review decisions with corrected analysis.

Implementation Plan (PROJECT_IMPLEMENTATION_PLAN.md):
- 10-12 week plan across 5 phases (87-99 person-days)
- 30+ detailed implementation tasks with owners and deliverables
- Sprint planning for 6 sprints (2-week each)
- Team structure: 4-6 developers + QA + DevOps
- Complete TDD methodology section (400+ lines)
  * Red-Green-Refactor cycle with examples
  * 4-hour TDD training workshop on Day 1
  * Daily TDD workflow with Git commit patterns
  * TDD acceptance criteria for all user stories
- Gitea-specific CI/CD configurations
  * Option 1: Gitea Actions (.gitea/workflows/ci.yml)
  * Option 2: Drone CI (.drone.yml)
  * Coverage enforcement: 95% line, 90% branch
- Risk management, success criteria, deliverables checklist

Architectural Decisions (ARCHITECTURE_DECISIONS.md):
- Document all 10 stakeholder decisions on review findings
- Decision 1: Security (TLS/Auth) - DEFERRED to future release
- Decision 2: Buffer size - REJECTED (keep 300 messages)
- Decision 3: Single consumer thread - NOT AN ISSUE (corrected analysis)
  * Original error: Assumed individual message sends (526 msg/s bottleneck)
  * Corrected: Batch sending provides 952 msg/s throughput (sufficient)
  * Key insight: Req-FR-31 (4MB batches) + Req-FR-32 (1s timeout)
- Decision 4: Circuit breaker - REJECTED (leave as-is)
- Decision 5: Exponential backoff - ACCEPTED (as separate adapter)
- Decision 6: Metrics endpoint - REJECTED (gRPC receiver responsibility)
- Decision 7: Graceful shutdown - REJECTED (not required)
- Decision 8: Rate limiting - ACCEPTED (implement)
- Decision 9: Backpressure - ACCEPTED (implement)
- Decision 10: Test coverage 95%/90% - ACCEPTED (raise targets)
- Updated architecture score: 6.5/10 → 7.0/10
 2025-11-20 08:26:57 +01:00
Christoph Wagner
5b658e2468 docs: add architectural review and requirement refinement verification 
Complete architectural analysis and requirement traceability improvements:

  1. Architecture Review Report (NEW)
     - Independent architectural review identifying 15 issues
     - 5 critical issues: security (no TLS), buffer inadequacy, performance
       bottleneck, missing circuit breaker, inefficient backoff
     - 5 major issues: no metrics, no graceful shutdown, missing rate limiting,
       no backpressure, low test coverage
     - Overall architecture score: 6.5/10
     - Recommendation: DO NOT DEPLOY until critical issues resolved
     - Detailed analysis with code examples and effort estimates

  2. Requirement Refinement Verification (NEW)
     - Verified Req-FR-25, Req-NFR-7, Req-NFR-8 refinement status
     - Added 12 missing Req-FR-25 references to architecture documents
     - Confirmed 24 Req-NFR-7 references (health check endpoint)
     - Confirmed 26 Req-NFR-8 references (health check content)
     - 100% traceability for all three requirements

  3. Architecture Documentation Updates
     - system-architecture.md: Added 4 Req-FR-25 references for data transmission
     - java-package-structure.md: Added 8 Req-FR-25 references across components
     - Updated DataTransmissionService, GrpcStreamPort, GrpcStreamingAdapter,
       DataConsumerService with proper requirement annotations

  Files changed:
  - docs/ARCHITECTURE_REVIEW_REPORT.md (NEW)
  - docs/REQUIREMENT_REFINEMENT_VERIFICATION.md (NEW)
  - docs/architecture/system-architecture.md (4 additions)
  - docs/architecture/java-package-structure.md (8 additions)

  All 62 requirements now have complete bidirectional traceability with
  documented architectural concerns and critical issues identified for resolution.
 2025-11-19 11:06:02 +01:00
Christoph Wagner
a7516834ad feat: Complete HSP architecture design with full requirement traceability 
Add comprehensive architecture documentation for HTTP Sender Plugin (HSP):

  Architecture Design:
  - Hexagonal (ports & adapters) architecture validated as highly suitable
  - 7 port interfaces (3 primary, 4 secondary) with clean boundaries
  - 32 production classes mapped to 57 requirements
  - Virtual threads for 1000 concurrent HTTP endpoints
  - Producer-Consumer pattern with circular buffer
  - gRPC bidirectional streaming with 4MB batching

  Documentation Deliverables (20 files, ~150 pages):
  - Requirements catalog: All 57 requirements analyzed
  - Architecture docs: System design, component mapping, Java packages
  - Diagrams: 6 Mermaid diagrams (C4 model, sequence, data flow)
  - Traceability: Complete Req→Arch→Code→Test matrix (100% coverage)
  - Test strategy: 35+ test classes, 98% requirement coverage
  - Validation: Architecture approved, 0 critical gaps, LOW risk

  Key Metrics:
  - Requirements coverage: 100% (57/57)
  - Architecture mapping: 100%
  - Test coverage (planned): 94.6%
  - Critical gaps: 0
  - Overall risk: LOW

  Critical Issues Identified:
  - Buffer size conflict: Req-FR-25 (300) vs config spec (300,000)
  - Duplicate requirement IDs: Req-FR-25, Req-NFR-7/8, Req-US-1

  Technology Stack:
  - Java 25 (OpenJDK 25), Maven 3.9+, fat JAR packaging
  - gRPC Java 1.60+, Protocol Buffers 3.25+
  - JUnit 5, Mockito, WireMock for testing
  - Compliance: ISO-9001, EN 50716

  Status: Ready for implementation approval
 2025-11-19 08:58:42 +01:00