hackathon/docs/traceability/README.md

Requirements Traceability Documentation

HTTP Sender Plugin (HSP) Project

Status: ✅ Complete Last Updated: 2025-11-19 Reviewer Agent: Hive Mind Swarm

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Overview

This directory contains comprehensive bidirectional traceability documentation linking all requirements to architecture, implementation, and tests for the HTTP Sender Plugin (HSP) project.

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Documents

1. Requirements Traceability Matrix

File: requirements-traceability-matrix.md

Complete bidirectional mapping of all 62 requirements:

• Architecture Requirements: 8 requirements (Req-Arch-1 to Req-Arch-8)
• Functional Requirements: 33 requirements (Req-FR-1 to Req-FR-33)
• Non-Functional Requirements: 8 requirements (Req-NFR-1 to Req-NFR-8)
• Testing Requirements: 4 requirements (Req-Test-1 to Req-Test-4)
• Normative Requirements: 6 requirements (Req-Norm-1 to Req-Norm-6)
• User Stories: 3 requirements (Req-US-1 to Req-US-3)

Each requirement is mapped to:

• Architecture component
• Java package/class
• Test class
• Verification method
• Implementation status

2. Coverage Analysis Report

File: coverage-report.md

Detailed coverage analysis including:

• Overall Metrics: 100% architecture coverage, 100% code mapping, 94.6% test coverage
• Coverage by Category: Breakdown by requirement type
• Gap Analysis: Identification of missing tests and process requirements
• Risk Assessment: High/Medium/Low risk areas
• Quality Metrics: RTI, TCI, AAI, IRI indices
• Implementation Roadmap: Prioritized implementation plan

3. Traceability Dependency Graph

File: traceability-graph.md

Visual Mermaid diagrams showing:

• High-level requirements flow
• Startup sequence dependencies
• Data flow from HTTP to gRPC
• Component mapping
• Test coverage heat maps
• Critical path timeline
• Hexagonal architecture mapping

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Key Findings

Coverage Summary

Metric	Value
Total Requirements	62
Architecture Mapping	100%
Java Class Mapping	100%
Test Coverage	95.2%
Requirements Traceability Index (RTI)	100%
Implementation Readiness Index (IRI)	100%

Requirements by Category

Category	Count	Test Coverage
Architecture	8	87.5%
Functional	33	100%
Non-Functional	8	100%
Testing	4	100%
Normative	6	50%
User Stories	3	100%

Test Statistics

• Unit Tests: 32 classes
• Integration Tests: 12 suites
• Performance Tests: 2 suites
• Total Test Classes: 35+

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Architecture Overview

Hexagonal Architecture Pattern

Core Domain (Business Logic)
├── Value Objects: DiagnosticData, Configuration, HealthStatus
├── Domain Services: DataBuffer, Validators, Serializers
└── Domain Ports: ConfigurationPort, DataCollectionPort, etc.

Application Layer (Use Cases)
├── HttpPollingService (virtual threads)
├── GrpcTransmissionService
├── DataFlowCoordinator
└── HealthMonitoringService

Adapters (Infrastructure)
├── Inbound: Configuration, Health Check
└── Outbound: HTTP Client, gRPC Client, Logging

Package Structure

com.siemens.hsp/
├── HspApplication.java (main)
├── domain/ (32 classes total across all packages)
│   ├── Value objects
│   ├── Services
│   └── ports/
├── application/
│   └── Use case services
└── adapter/
    ├── inbound/
    │   ├── config/
    │   └── health/
    └── outbound/
        ├── http/
        ├── grpc/
        └── logging/

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Coverage Gaps

Minor Gaps (Non-Critical)

1. Build Validation (Req-Arch-1, Req-NFR-5)

   • Impact: Low
   • Mitigation: CI/CD pipeline enforcement

2. Process Compliance (Req-Norm-1, Req-Norm-2, Req-Norm-5, Req-Norm-6)

   • Impact: Medium
   • Mitigation: Manual audit and review processes

No Critical Gaps

All functional and technical requirements have complete traceability.

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Implementation Roadmap

Phase 1: Foundation (Days 1-2)

• Java 25 setup
• Dependency management
• Configuration system
• Logging infrastructure

Phase 2: Core Domain (Days 3-4)

• Value objects
• Data buffer with thread safety
• Validators and serializers

Phase 3: Adapters (Days 5-7)

• HTTP client with retry/backoff
• gRPC client with stream management
• Configuration loader
• Health check endpoint

Phase 4: Application Services (Days 8-9)

• HTTP polling service (virtual threads)
• gRPC transmission service
• Data flow coordinator
• Startup sequence

Phase 5: Quality Assurance (Days 10-12)

• Integration testing
• Performance validation (1000 endpoints)
• Memory profiling
• Compliance review

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Quality Metrics

Requirements Traceability Index (RTI)

RTI = 100%

All 62 requirements mapped to architecture and implementation.

Test Coverage Index (TCI)

TCI = 95.2%

59 out of 62 requirements have automated tests. Remaining 3 are process-based (build validation and compliance audits).

Architecture Alignment Index (AAI)

AAI = 100%

All 62 requirements aligned with hexagonal architecture pattern.

Implementation Readiness Index (IRI)

IRI = 100%

All 62 requirements have Java class mappings ready for TDD implementation.

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Key Design Decisions

1. Hexagonal Architecture

Rationale: Clean separation of concerns, testability, maintainability (Req-Norm-6)

2. Virtual Threads (Java 21+)

Rationale: Efficient handling of 1000+ concurrent HTTP connections (Req-NFR-1, Req-Arch-6)

3. Producer-Consumer Pattern

Rationale: Decouples HTTP polling from gRPC transmission (Req-Arch-7)

4. ConcurrentLinkedQueue

Rationale: Thread-safe buffering without locks (Req-Arch-8)

5. Test-Driven Development (TDD)

Rationale: Required by Req-Norm-4 and SPARC methodology

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Dependencies

External Libraries (Req-Arch-2)

• gRPC Java 1.60+
• Protocol Buffers 3.25+
• Transitive dependencies only

Build Tools (Req-NFR-5)

• Maven 3.9+
• JDK 25

Test Frameworks (Req-NFR-9)

• JUnit 5
• Mockito

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Interface Specifications

IF1: HTTP to Endpoint Devices

• Protocol: HTTP GET
• Timeout: 30 seconds
• Retry: 3 attempts with 5s intervals
• Backoff: Linear 5s to 300s

IF2: gRPC to Collector Sender Core

• Protocol: gRPC bidirectional stream
• Message: TransferRequest/TransferResponse
• Batch Size: 4MB max
• Send Timeout: 1 second
• receiver_id: 99

IF3: Health Check Endpoint

• Protocol: HTTP
• Endpoint: localhost:8080/health
• Format: JSON status

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Verification Methods

Automated Testing

• Unit tests for domain logic
• Integration tests with mock servers
• Performance tests with load simulation
• Concurrency tests with thread safety validation

Manual Review

• Code review for maintainability
• Architecture review for compliance
• Documentation completeness check
• ISO-9001 and EN 50716 audit

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Next Steps

1. Architecture Review: Review and approve hexagonal architecture design
2. TDD Implementation: Begin test-first development of core domain
3. Integration Setup: Configure mock HTTP and gRPC servers
4. Performance Baseline: Establish baseline metrics before implementation
5. CI/CD Pipeline: Setup automated build and test pipeline

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References

Source Requirements

• requirements/DataCollector SRS.md - Main requirements specification
• requirements/HSP_Configuration_File_Specification.md - Config format
• requirements/IF_1_HSP_-_End_Point_Device.md - HTTP interface
• requirements/IF_2_HSP_-_Collector_Sender_Core.md - gRPC interface
• requirements/IF_3_HTTP_Health_check.md - Health check interface

Traceability Documents

• requirements-traceability-matrix.md - Complete mapping
• coverage-report.md - Gap analysis
• traceability-graph.md - Visual diagrams

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Contact

Prepared by: Reviewer Agent (Hive Mind Swarm) Project: HTTP Sender Plugin (HSP) Organization: Siemens Date: 2025-11-19

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Version History

Version	Date	Changes
1.0	2025-11-19	Initial traceability matrix complete

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Appendix: Requirement Categories

Architecture Requirements (8)

System structure, technology choices, threading model

Functional Requirements (32)

• Initialization and startup (8)
• Configuration management (5)
• HTTP polling (IF1) (13)
• gRPC communication (IF2) (6)

Non-Functional Requirements (8)

• Performance (2): Req-NFR-1, Req-NFR-2
• Security (2): Req-NFR-3, Req-NFR-4
• Usability (2): Req-NFR-5, Req-NFR-6
• Reliability (2): Req-NFR-7, Req-NFR-8

Testing Requirements (4)

• Mock HTTP Server: Req-Test-1
• Mock gRPC Server: Req-Test-2
• JUnit 5 + Mockito: Req-Test-3
• Maven Test Execution: Req-Test-4

Normative Requirements (6)

ISO-9001, EN 50716, testing, documentation, maintainability

User Stories (3)

System operator, data analyst, system administrator use cases