hackathon/docs/traceability/requirements-traceability-matrix.md

Requirements Traceability Matrix

HTTP Sender Plugin (HSP) - Bidirectional Traceability

Document Version: 1.0 Date: 2025-11-19 Status: Design Phase

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Table of Contents

1. Architecture Requirements
2. Functional Requirements
3. Non-Functional Requirements
4. Normative Requirements
5. User Stories

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Architecture Requirements

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-Arch-1	Architecture	OpenJDK 25, Java 25	Build System	pom.xml	N/A	Build config review, compiler version check	Designed
Req-Arch-2	Architecture	External libraries: gRPC Java 1.60+, Protobuf 3.25+ only	Build System, Dependency Management	pom.xml dependencies	DependencyValidationTest	Dependency analysis, license check	Designed
Req-Arch-3	Architecture	Log to hsp.log in temp directory	Logging Infrastructure	com.siemens.hsp.adapter.outbound.logging.FileLoggerAdapter	LoggerAdapterTest	Integration test with file verification	Designed
Req-Arch-4	Architecture	Java Logging API with rotation (100MB, 5 files)	Logging Infrastructure	com.siemens.hsp.adapter.outbound.logging.LoggingConfiguration	LoggingConfigurationTest	Unit test, file rotation validation	Designed
Req-Arch-5	Architecture	Always run unless unrecoverable error	Main Application Loop	com.siemens.hsp.HspApplication (main)	ApplicationLifecycleTest	Integration test with failure scenarios	Designed
Req-Arch-6	Architecture	Multi-threaded: HTTP polling (virtual threads), gRPC transmission	Core Domain Services	com.siemens.hsp.application.HttpPollingService com.siemens.hsp.application.GrpcTransmissionService	HttpPollingServiceTest GrpcTransmissionServiceTest	Multi-threading integration test	Designed
Req-Arch-7	Architecture	Producer-Consumer pattern (IF1 to IF2)	Core Domain	com.siemens.hsp.domain.DataBuffer com.siemens.hsp.application.DataFlowCoordinator	DataBufferTest DataFlowCoordinatorTest	Unit test, pattern validation	Designed
Req-Arch-8	Architecture	Thread-safe collections for buffering	Core Domain	com.siemens.hsp.domain.DataBuffer (using ConcurrentLinkedQueue)	DataBufferConcurrencyTest	Concurrency test with multiple threads	Designed

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Functional Requirements

Initialization and Startup (Req-FR-1 to Req-FR-8)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-FR-1	Functional	Execute startup sequence	Application Orchestration	com.siemens.hsp.HspApplication	ApplicationStartupTest	Integration test with full startup	Designed
Req-FR-2	Functional	Startup step 1: Load and validate configuration	Configuration Port (Inbound)	com.siemens.hsp.adapter.inbound.config.ConfigurationLoader com.siemens.hsp.domain.Configuration	ConfigurationLoaderTest ConfigurationValidatorTest	Unit test with valid/invalid configs	Designed
Req-FR-3	Functional	Startup step 2: Initialize logging	Logging Port (Outbound)	com.siemens.hsp.adapter.outbound.logging.FileLoggerAdapter	LoggerAdapterTest	Unit test, log file creation check	Designed
Req-FR-4	Functional	Startup step 3: Establish gRPC connection	gRPC Port (Outbound)	com.siemens.hsp.adapter.outbound.grpc.GrpcClientAdapter	GrpcClientAdapterTest	Integration test with mock gRPC server	Designed
Req-FR-5	Functional	Startup step 4: Begin HTTP polling	HTTP Polling Service	com.siemens.hsp.application.HttpPollingService	HttpPollingServiceTest	Integration test with mock HTTP server	Designed
Req-FR-6	Functional	gRPC retry: every 5s, log warnings every 1 min	Connection Management	com.siemens.hsp.adapter.outbound.grpc.ConnectionManager	ConnectionManagerTest	Unit test with timing validation	Designed
Req-FR-7	Functional	No HTTP polling until gRPC connected	Application Orchestration	com.siemens.hsp.HspApplication	StartupSequenceTest	Integration test with connection delays	Designed
Req-FR-8	Functional	Log "HSP started successfully" at INFO	Application Orchestration	com.siemens.hsp.HspApplication	ApplicationStartupTest	Log output validation	Designed

Configuration Management (Req-FR-9 to Req-FR-13)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-FR-9	Functional	Configurable via configuration file	Configuration Port	com.siemens.hsp.domain.ports.inbound.ConfigurationPort com.siemens.hsp.adapter.inbound.config.JsonConfigurationAdapter	ConfigurationPortTest JsonConfigurationAdapterTest	Unit test with sample configs	Designed
Req-FR-10	Functional	Read config file from application directory at startup	Configuration Adapter	com.siemens.hsp.adapter.inbound.config.ConfigurationLoader	ConfigurationLoaderTest	Integration test with file I/O	Designed
Req-FR-11	Functional	Validate all configuration parameters	Domain Validation	com.siemens.hsp.domain.ConfigurationValidator	ConfigurationValidatorTest	Unit test with boundary values	Designed
Req-FR-12	Functional	Terminate with error code 1 on validation failure	Application Main	com.siemens.hsp.HspApplication	ConfigurationFailureTest	Integration test with exit code check	Designed
Req-FR-13	Functional	Log validation failure reason	Logging	com.siemens.hsp.domain.ConfigurationValidator	ConfigurationValidatorTest	Log output validation	Designed

HTTP Polling (IF1) (Req-FR-14 to Req-FR-26)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-FR-14	Functional	Establish connection to configured devices (IF1)	HTTP Client Port	com.siemens.hsp.adapter.outbound.http.HttpClientAdapter	HttpClientAdapterTest	Integration test with mock HTTP endpoints	Designed
Req-FR-15	Functional	30 second timeout for HTTP GET	HTTP Client	com.siemens.hsp.adapter.outbound.http.HttpClientAdapter	HttpClientTimeoutTest	Integration test with delayed responses	Designed
Req-FR-16	Functional	Poll at configured intervals	HTTP Polling Service	com.siemens.hsp.application.HttpPollingService	HttpPollingIntervalTest	Integration test with timing validation	Designed
Req-FR-17	Functional	Retry 3 times with 5-second intervals	Retry Logic	com.siemens.hsp.adapter.outbound.http.RetryHandler	RetryHandlerTest	Unit test with failure simulation	Designed
Req-FR-18	Functional	Linear backoff: 5s to 300s, +5s per attempt	Backoff Strategy	com.siemens.hsp.adapter.outbound.http.BackoffStrategy	BackoffStrategyTest	Unit test with timing calculations	Designed
Req-FR-19	Functional	No concurrent connections to same endpoint	Connection Pool	com.siemens.hsp.adapter.outbound.http.EndpointConnectionPool	EndpointConnectionPoolTest	Concurrency test	Designed
Req-FR-20	Functional	Continue polling other endpoints if one fails	Fault Isolation	com.siemens.hsp.application.HttpPollingService	FaultIsolationTest	Integration test with partial failures	Designed
Req-FR-21	Functional	Reject files larger than 1MB, log warning	Data Validation	com.siemens.hsp.domain.DiagnosticDataValidator	DataValidatorTest	Unit test with oversized data	Designed
Req-FR-22	Functional	Wrap collected data in JSON	Data Serialization	com.siemens.hsp.domain.JsonDataSerializer	JsonDataSerializerTest	Unit test with serialization validation	Designed
Req-FR-23	Functional	Encode binary as Base64 in JSON	Data Encoding	com.siemens.hsp.domain.JsonDataSerializer	Base64EncodingTest	Unit test with binary data	Designed
Req-FR-24	Functional	JSON includes: plugin_name, timestamp (ISO 8601), source_endpoint, data_size, payload	JSON Structure	com.siemens.hsp.domain.DiagnosticData (value object)	DiagnosticDataTest	Unit test with JSON schema validation	Designed
Req-FR-25	Functional	Send data to Collector Sender Core	gRPC Transmission	com.siemens.hsp.application.GrpcTransmissionService	GrpcTransmissionServiceTest	Integration test with mock gRPC	Designed
Req-FR-25 (dup)	Functional	Buffer data in memory on transmission failure (max 300)	Data Buffer	com.siemens.hsp.domain.DataBuffer	DataBufferTest	Unit test with buffer overflow	Designed
Req-FR-26	Functional	Discard oldest data when buffer full	Buffer Management	com.siemens.hsp.domain.DataBuffer	DataBufferOverflowTest	Unit test with FIFO validation	Designed

gRPC Communication (IF2) (Req-FR-27 to Req-FR-32)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-FR-27	Functional	Communicate via Interface IF2	gRPC Port	com.siemens.hsp.adapter.outbound.grpc.GrpcClientAdapter com.siemens.coreshield.owg.shared.grpc.TransferService*	GrpcClientAdapterTest	Integration test with protobuf validation	Designed
Req-FR-28	Functional	Single bidirectional gRPC stream at startup	gRPC Stream Management	com.siemens.hsp.adapter.outbound.grpc.StreamManager	StreamManagerTest	Integration test with stream lifecycle	Designed
Req-FR-29	Functional	On stream failure: close, wait 5s, re-establish	Connection Recovery	com.siemens.hsp.adapter.outbound.grpc.ConnectionManager	ConnectionRecoveryTest	Integration test with connection drops	Designed
Req-FR-30	Functional	Send TransferRequest with max 4MB data	Message Batching	com.siemens.hsp.application.GrpcTransmissionService	MessageBatchingTest	Unit test with size calculations	Designed
Req-FR-31	Functional	Send batch within 1s if not reaching 4MB	Message Timing	com.siemens.hsp.application.GrpcTransmissionService	MessageTimingTest	Integration test with timing validation	Designed
Req-FR-32	Functional	Set receiver_id to 99 for all requests	Protocol Constants	com.siemens.hsp.adapter.outbound.grpc.GrpcClientAdapter	GrpcClientAdapterTest	Unit test with message inspection	Designed

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Non-Functional Requirements

Performance (Req-NFR-1 to Req-NFR-2)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-NFR-1	Performance	Support 1000 concurrent HTTP endpoints	Scalability Architecture	com.siemens.hsp.application.HttpPollingService (virtual threads)	PerformanceScalabilityTest	Load test with 1000 endpoints	Designed
Req-NFR-2	Performance	Memory usage not exceed 4096MB	Resource Management	Application-wide monitoring	MemoryUsageTest	Integration test with memory profiling	Designed

Security (Req-NFR-3 to Req-NFR-4)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-NFR-3	Security	No HTTP authentication	HTTP Client Configuration	com.siemens.hsp.adapter.outbound.http.HttpClientAdapter	SecurityConfigTest	Code review, configuration validation	Designed
Req-NFR-4	Security	TCP mode only for gRPC	gRPC Configuration	com.siemens.hsp.adapter.outbound.grpc.GrpcClientAdapter	GrpcSecurityTest	Configuration validation	Designed

Usability (Req-NFR-5 to Req-NFR-6)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-NFR-5	Usability	Built with Maven 3.9+	Build System	pom.xml	N/A	Build process validation	Designed
Req-NFR-6	Usability	Packaged as executable fat JAR	Build Configuration	pom.xml (maven-shade-plugin)	JarPackagingTest	Build artifact inspection	Designed

Reliability (Req-NFR-7 to Req-NFR-8)

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-NFR-7	Reliability	Health check endpoint on localhost:8080/health	Health Check Port (Inbound)	com.siemens.hsp.adapter.inbound.health.HealthCheckAdapter	HealthCheckAdapterTest	Integration test with HTTP requests	Designed
Req-NFR-8	Reliability	Health check JSON: service_status, last_collection, gRPC status, error counts, success/fail counts (30s)	Health Monitoring	com.siemens.hsp.application.HealthMonitoringService	HealthMonitoringServiceTest	Integration test with JSON validation	Designed

Testing (Req-NFR-7 to Req-NFR-10) - Note: Duplicate numbering in source

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-NFR-7 (Testing)	Testing	Integration test: HTTP collection with mock server	Test Infrastructure	N/A	HttpCollectionIntegrationTest	JUnit 5 test execution	Designed
Req-NFR-8 (Testing)	Testing	Integration test: gRPC transmission with mock server	Test Infrastructure	N/A	GrpcTransmissionIntegrationTest	JUnit 5 test execution	Designed
Req-NFR-9	Testing	Use JUnit 5 and Mockito frameworks	Test Framework	pom.xml test dependencies	N/A	Build configuration review	Designed
Req-NFR-10	Testing	Tests executable via 'mvn test'	Build System	pom.xml	N/A	Maven build validation	Designed

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Normative Requirements

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-Norm-1	Normative	ISO-9001 compliance	Quality Management Process	All modules	N/A	Process audit, documentation review	Designed
Req-Norm-2	Normative	Cenelec EN 50716 Basic Integrity	Safety Standards	All modules	N/A	Safety analysis, code review	Designed
Req-Norm-3	Normative	Error detection and handling (invalid data, timeouts, faults)	Error Handling Architecture	com.siemens.hsp.domain.ErrorHandler All adapters	ErrorHandlingTest TimeoutHandlingTest	Integration test with fault injection	Designed
Req-Norm-4	Normative	Rigorous testing: unit, integration, validation	Test Strategy	Test suite across all packages	All test classes	Test coverage analysis (target: 80%+)	Designed
Req-Norm-5	Normative	Document development process (requirements, design, implementation, testing)	Documentation	docs/ folder structure	N/A	Documentation completeness review	Designed
Req-Norm-6	Normative	Maintainable design: clear code, modular architecture	Code Quality	Hexagonal architecture pattern	N/A	Code review, architecture review	Designed

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User Stories

Req ID	Category	Description	Architecture Component	Java Package/Class	Test Class	Verification Method	Status
Req-US-1a	User Story	System operator: automatic collection every second for real-time monitoring	HTTP Polling Service	com.siemens.hsp.application.HttpPollingService	HttpPollingServiceTest	Integration test with timing validation	Designed
Req-US-1b	User Story	Data analyst: reliable transmission via gRPC with buffering	Data Flow Coordination	com.siemens.hsp.application.DataFlowCoordinator com.siemens.hsp.domain.DataBuffer	DataFlowCoordinatorTest DataBufferTest	Integration test with network failures	Designed
Req-US-1c	User Story	System administrator: check health status via HTTP endpoint	Health Check Port	com.siemens.hsp.adapter.inbound.health.HealthCheckAdapter	HealthCheckAdapterTest	Integration test with health endpoint	Designed

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Hexagonal Architecture Mapping

Core Domain (Business Logic)

• Value Objects: DiagnosticData, Configuration, HealthStatus
• Entities: N/A (stateless service)
• Services: DataBuffer, ConfigurationValidator, JsonDataSerializer, DiagnosticDataValidator
• Domain Ports: ConfigurationPort, DataCollectionPort, DataTransmissionPort, HealthStatusPort

Application Layer (Use Cases)

• Services: HttpPollingService, GrpcTransmissionService, DataFlowCoordinator, HealthMonitoringService
• Orchestration: HspApplication (main)

Adapters (Infrastructure)

Inbound Adapters (Driving)

• Configuration: JsonConfigurationAdapter, ConfigurationLoader
• Health Check: HealthCheckAdapter (HTTP endpoint)

Outbound Adapters (Driven)

• HTTP Client: HttpClientAdapter, RetryHandler, BackoffStrategy, EndpointConnectionPool
• gRPC Client: GrpcClientAdapter, StreamManager, ConnectionManager
• Logging: FileLoggerAdapter, LoggingConfiguration

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Package Structure

com.siemens.hsp/
├── HspApplication.java                    # Main entry point
├── domain/                                # Core domain (no dependencies)
│   ├── DiagnosticData.java               # Value object
│   ├── Configuration.java                # Value object
│   ├── HealthStatus.java                 # Value object
│   ├── DataBuffer.java                   # Thread-safe buffer
│   ├── ConfigurationValidator.java       # Validation logic
│   ├── JsonDataSerializer.java           # JSON serialization
│   ├── DiagnosticDataValidator.java      # Data validation
│   └── ports/
│       ├── inbound/
│       │   ├── ConfigurationPort.java
│       │   └── HealthStatusPort.java
│       └── outbound/
│           ├── DataCollectionPort.java
│           ├── DataTransmissionPort.java
│           └── LoggingPort.java
├── application/                          # Use case orchestration
│   ├── HttpPollingService.java
│   ├── GrpcTransmissionService.java
│   ├── DataFlowCoordinator.java
│   └── HealthMonitoringService.java
└── adapter/
    ├── inbound/
    │   ├── config/
    │   │   ├── JsonConfigurationAdapter.java
    │   │   └── ConfigurationLoader.java
    │   └── health/
    │       └── HealthCheckAdapter.java
    └── outbound/
        ├── http/
        │   ├── HttpClientAdapter.java
        │   ├── RetryHandler.java
        │   ├── BackoffStrategy.java
        │   └── EndpointConnectionPool.java
        ├── grpc/
        │   ├── GrpcClientAdapter.java
        │   ├── StreamManager.java
        │   └── ConnectionManager.java
        └── logging/
            ├── FileLoggerAdapter.java
            └── LoggingConfiguration.java

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Generated Protobuf Classes

com.siemens.coreshield.owg.shared.grpc/
├── TransferServiceGrpc.java              # Generated service stub
├── TransferRequest.java                  # Generated message
└── TransferResponse.java                 # Generated message

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Summary Statistics

• Total Requirements: 56 unique requirements

  • Architecture Requirements: 8
  • Functional Requirements: 32
  • Non-Functional Requirements: 10
  • Normative Requirements: 6
  • User Stories: 3 (decomposed from 1)

• Java Classes (Estimated): 32 production classes

• Test Classes (Estimated): 35+ test classes

• Test Coverage Target: 80%+ line coverage

• Requirements by Status:

  • Designed: 56 (100%)
  • Implemented: 0 (0%)
  • Tested: 0 (0%)
  • Verified: 0 (0%)

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Notes

1. Duplicate Requirement IDs: Req-FR-25 appears twice in source document (data transmission and buffering). Both mapped separately.
2. Testing Requirements Numbering: Req-NFR-7 and Req-NFR-8 appear twice (reliability and testing). Disambiguated in matrix.
3. User Story Decomposition: Req-US-1 contains three distinct user stories, decomposed as Req-US-1a, Req-US-1b, Req-US-1c.
4. Hexagonal Architecture: Design follows ports and adapters pattern for clean dependency management.
5. Virtual Threads (Java 21+): Req-Arch-6 leverages Project Loom for efficient concurrent HTTP polling.
6. Protobuf Generation: IF2 protobuf classes generated from provided .proto schema.

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Next Steps:

1. Architecture design review and approval
2. Detailed class design for core domain
3. Test-driven implementation (TDD)
4. Integration testing with mock servers
5. Performance validation with 1000 endpoints
6. Security audit and normative compliance review