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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

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# HSP Requirements Catalog
**Document Version**: 1.2
**Generated**: 2025-11-19
**Updated**: 2025-11-19 (Critical Issues Resolved - Final)
**Researcher**: Hive Mind Research Agent
**Total Unique Requirements**: 62 ✅
---
## Executive Summary
This catalog contains all unique requirement IDs extracted from the HSP (HTTP Sender Plugin) system documentation. Requirements are organized by category with traceability to source documents.
### Requirements Distribution by Category
| Category | Count | Description |
|----------|-------|-------------|
| Architecture (Req-Arch) | 8 | Architectural framework and technical foundations |
| Functional (Req-FR) | 33 | Functional behavior and operational requirements |
| Non-Functional (Req-NFR) | 8 | Performance, security, usability, reliability |
| Normative (Req-Norm) | 6 | Standards compliance (ISO-9001, EN 50716) |
| Testing (Req-Test) | 4 | Testing requirements |
| User Stories (Req-US) | 3 | User-centric requirement descriptions |
---
## 1. Architecture Requirements (Req-Arch)
### Req-Arch-1
- **Category**: Architecture / Technology Stack
- **Description**: The HSP shall be developed in OpenJDK 25, featuring Java 25.
- **Source**: DataCollector SRS.md (Line 24)
- **Priority**: Critical
- **Dependencies**: Foundation for all other requirements
### Req-Arch-2
- **Category**: Architecture / Dependency Management
- **Description**: HSP shall use only the following external libraries: gRPC Java 1.60+, Protocol Buffers 3.25+, and their transitive dependencies. All other functionality shall use only OpenJDK 25 standard library classes.
- **Source**: DataCollector SRS.md (Line 25)
- **Priority**: Critical
- **Dependencies**: None
- **Related**: Req-NFR-5 (Maven build)
### Req-Arch-3
- **Category**: Architecture / Logging
- **Description**: HSP shall log all log messages and errors to the file "hsp.log" in a temp directory.
- **Source**: DataCollector SRS.md (Line 26)
- **Priority**: High
- **Dependencies**: None
- **Related**: Req-Arch-4, Req-FR-3
### Req-Arch-4
- **Category**: Architecture / Logging
- **Description**: For logging the Java Logging API with log rotation (max 100MB per file, 5 files) shall be used.
- **Source**: DataCollector SRS.md (Line 27)
- **Priority**: High
- **Dependencies**: Req-Arch-3
- **Constraints**: Max 500MB total log storage (5 × 100MB)
### Req-Arch-5
- **Category**: Architecture / System Lifecycle
- **Description**: HSP shall always run and not terminate unless an unrecoverable error occurs.
- **Source**: DataCollector SRS.md (Line 28)
- **Priority**: Critical
- **Dependencies**: None
- **Related**: Req-FR-6 (retry logic), Req-FR-29 (stream recovery)
### Req-Arch-6
- **Category**: Architecture / Threading Model
- **Description**: HSP shall use a multi-threaded architecture with separate threads for HTTP polling and gRPC transmission. For the HTTP polling virtual threads shall be used to lower the resource demand.
- **Source**: DataCollector SRS.md (Line 29)
- **Priority**: Critical
- **Dependencies**: OpenJDK 25 (virtual threads support)
- **Related**: Req-NFR-1 (1000 concurrent devices)
### Req-Arch-7
- **Category**: Architecture / Design Pattern
- **Description**: HSP shall implement the Producer-Consumer pattern for data flow between IF1 and IF2.
- **Source**: DataCollector SRS.md (Line 30)
- **Priority**: High
- **Dependencies**: Req-Arch-6
- **Related**: Req-FR-25 (buffering)
### Req-Arch-8
- **Category**: Architecture / Concurrency
- **Description**: HSP shall use thread-safe collections for data buffering.
- **Source**: DataCollector SRS.md (Line 31)
- **Priority**: High
- **Dependencies**: Req-Arch-7
- **Related**: Req-FR-25, Req-FR-26
---
## 2. Functional Requirements (Req-FR)
### Req-FR-1
- **Category**: Functional / Initialization
- **Description**: HSP shall execute the following startup sequence.
- **Source**: DataCollector SRS.md (Line 38)
- **Priority**: Critical
- **Dependencies**: None
- **Related**: Req-FR-2, Req-FR-3, Req-FR-4, Req-FR-5
### Req-FR-2
- **Category**: Functional / Initialization
- **Description**: Startup step 1: Load and validate configuration as described below.
- **Source**: DataCollector SRS.md (Line 39)
- **Priority**: Critical
- **Dependencies**: Req-FR-1, HSP_Configuration_File_Specification.md
- **Related**: Req-FR-9, Req-FR-10, Req-FR-11, Req-FR-12
### Req-FR-3
- **Category**: Functional / Initialization
- **Description**: Startup step 2: Initialize logging.
- **Source**: DataCollector SRS.md (Line 40)
- **Priority**: Critical
- **Dependencies**: Req-FR-1, Req-Arch-3, Req-Arch-4
- **Related**: None
### Req-FR-4
- **Category**: Functional / Initialization
- **Description**: Startup step 3: Establish gRPC connection to the Collector Sender Core as described below.
- **Source**: DataCollector SRS.md (Line 41)
- **Priority**: Critical
- **Dependencies**: Req-FR-1, Req-FR-27, Req-FR-28
- **Related**: Req-FR-6, Req-FR-7
### Req-FR-5
- **Category**: Functional / Initialization
- **Description**: Startup step 4: Begin HTTP polling of diagnostic data from the endpoint devices.
- **Source**: DataCollector SRS.md (Line 42)
- **Priority**: Critical
- **Dependencies**: Req-FR-1, Req-FR-14, Req-FR-7
- **Related**: Req-FR-16
### Req-FR-6
- **Category**: Functional / Error Handling
- **Description**: If gRPC connection fails, HSP shall retry every 5 seconds indefinitely and log warnings every 1 minute.
- **Source**: DataCollector SRS.md (Line 43)
- **Priority**: High
- **Dependencies**: Req-FR-4
- **Related**: Req-FR-29, Req-Arch-5
- **Configuration**: backoff.grpc_interval_seconds = 5
### Req-FR-7
- **Category**: Functional / Initialization
- **Description**: HSP shall not begin HTTP polling until the gRPC connection is successfully established.
- **Source**: DataCollector SRS.md (Line 44)
- **Priority**: Critical
- **Dependencies**: Req-FR-4, Req-FR-5
- **Related**: None
### Req-FR-8
- **Category**: Functional / Logging
- **Description**: HSP shall log "HSP started successfully" at INFO level when all initialization steps complete.
- **Source**: DataCollector SRS.md (Line 45)
- **Priority**: Medium
- **Dependencies**: Req-FR-1, Req-FR-2, Req-FR-3, Req-FR-4, Req-FR-5
- **Related**: Req-Arch-3
### Req-FR-9
- **Category**: Functional / Configuration
- **Description**: The HSP shall be configurable via a configuration file as described in the HSP Configuration File Specification.
- **Source**: DataCollector SRS.md (Line 47)
- **Priority**: Critical
- **Dependencies**: HSP_Configuration_File_Specification.md
- **Related**: Req-FR-10
### Req-FR-10
- **Category**: Functional / Configuration
- **Description**: At startup HSP shall read in the configuration file located in the application directory and apply the configuration.
- **Source**: DataCollector SRS.md (Line 48)
- **Priority**: Critical
- **Dependencies**: Req-FR-9, Req-FR-2
- **File**: ./hsp-config.json
- **Related**: None
### Req-FR-11
- **Category**: Functional / Validation
- **Description**: HSP shall validate all configuration parameters to be within given limits.
- **Source**: DataCollector SRS.md (Line 50)
- **Priority**: Critical
- **Dependencies**: Req-FR-10, HSP_Configuration_File_Specification.md (Field value limits)
- **Related**: Req-FR-12, Req-FR-13
### Req-FR-12
- **Category**: Functional / Error Handling
- **Description**: If validation fails HSP shall terminate with error code 1.
- **Source**: DataCollector SRS.md (Line 51)
- **Priority**: Critical
- **Dependencies**: Req-FR-11
- **Related**: Req-FR-13
### Req-FR-13
- **Category**: Functional / Logging
- **Description**: If validation fails HSP shall log the reason for the failed validation.
- **Source**: DataCollector SRS.md (Line 52)
- **Priority**: High
- **Dependencies**: Req-FR-11, Req-FR-12
- **Related**: Req-Arch-3
### Req-FR-14
- **Category**: Functional / HTTP Collection
- **Description**: The HSP shall establish a connection to all configured devices according to interface IF1.
- **Source**: DataCollector SRS.md (Line 54)
- **Priority**: Critical
- **Dependencies**: IF_1_HSP_-_End_Point_Device.md
- **Related**: Req-FR-5, Req-FR-16
### Req-FR-15
- **Category**: Functional / HTTP Collection
- **Description**: HSP shall set a timeout of 30 seconds for each HTTP GET request.
- **Source**: DataCollector SRS.md (Line 55)
- **Priority**: High
- **Dependencies**: Req-FR-14
- **Configuration**: http.request_timeout_seconds = 30
- **Related**: Req-FR-17
### Req-FR-16
- **Category**: Functional / HTTP Collection
- **Description**: HSP shall poll each configured HTTP endpoint device at intervals specified in the configuration.
- **Source**: DataCollector SRS.md (Line 56)
- **Priority**: Critical
- **Dependencies**: Req-FR-14, Req-FR-9
- **Configuration**: http.polling_interval_seconds (1-3600)
- **Related**: None
### Req-FR-17
- **Category**: Functional / Error Handling
- **Description**: If the HTTP GET request fails HSP shall retry up to 3 times with 5-second intervals before marking the connection to the endpoint device as failed.
- **Source**: DataCollector SRS.md (Line 57)
- **Priority**: High
- **Dependencies**: Req-FR-14
- **Configuration**: http.max_retries = 3, http.retry_interval_seconds = 5
- **Related**: Req-FR-18
### Req-FR-18
- **Category**: Functional / Error Handling
- **Description**: HSP shall implement linear backoff for failed endpoint connections. Starting at 5s to a maximum of 300s, adding 5s in every attempt.
- **Source**: DataCollector SRS.md (Line 58)
- **Priority**: High
- **Dependencies**: Req-FR-17
- **Configuration**: backoff.http_start_seconds = 5, backoff.http_max_seconds = 300, backoff.http_increment_seconds = 5
- **Related**: None
### Req-FR-19
- **Category**: Functional / HTTP Collection
- **Description**: HSP shall not have concurrent connections to the same endpoint device.
- **Source**: DataCollector SRS.md (Line 59)
- **Priority**: High
- **Dependencies**: Req-FR-14, Req-Arch-6
- **Related**: None
### Req-FR-20
- **Category**: Functional / Error Handling
- **Description**: HSP shall continue polling other endpoint devices if one endpoint device fails.
- **Source**: DataCollector SRS.md (Line 60)
- **Priority**: High
- **Dependencies**: Req-FR-14, Req-FR-17
- **Related**: Req-Arch-5
### Req-FR-21
- **Category**: Functional / Data Validation
- **Description**: HSP shall reject binary files larger than 1MB and shall log a warning.
- **Source**: DataCollector SRS.md (Line 62)
- **Priority**: High
- **Dependencies**: Req-FR-14
- **Constraint**: Max 1MB = 1,048,576 bytes
- **Related**: Req-FR-24 (data_size field)
### Req-FR-22
- **Category**: Functional / Data Serialization
- **Description**: HSP shall wrap the collected data in JSON as data serialization format.
- **Source**: DataCollector SRS.md (Line 63)
- **Priority**: Critical
- **Dependencies**: Req-FR-14, IF_2_HSP_-_Collector_Sender_Core.md
- **Related**: Req-FR-23, Req-FR-24
### Req-FR-23
- **Category**: Functional / Data Encoding
- **Description**: HSP shall encode binary file as Base64 strings within the JSON payload.
- **Source**: DataCollector SRS.md (Line 64)
- **Priority**: Critical
- **Dependencies**: Req-FR-22
- **Related**: Req-FR-24
### Req-FR-24
- **Category**: Functional / Data Format
- **Description**: Each JSON message shall include: "HTTP sender plugin" as the plugin name, timestamp (ISO 8601), source_endpoint (URL), data_size (bytes), and payload (Base64 encoded binary).
- **Source**: DataCollector SRS.md (Line 65)
- **Priority**: Critical
- **Dependencies**: Req-FR-22, Req-FR-23
- **Format**: See IF_2 section 3.2 for JSON schema
- **Related**: None
### Req-FR-25 (First Instance)
- **Category**: Functional / gRPC Transmission
- **Description**: HSP shall then send the collected and aggregated data to the CollectorSender Core as described below.
- **Source**: DataCollector SRS.md (Line 66)
- **Priority**: Critical
- **Dependencies**: Req-FR-27, Req-FR-28
- **Related**: None
### Req-FR-26
- **Category**: Functional / Buffering
- **Description**: If gRPC transmission fails, HSP shall buffer collected data in memory (max 300 messages - RESOLVED 2025-11-19).
- **Source**: DataCollector SRS.md (Line 67)
- **Priority**: High
- **Dependencies**: Req-FR-25, Req-Arch-7, Req-Arch-8
- **Configuration**: buffer.max_messages = 300 (RESOLVED: Confirmed as 300 messages, not 300,000)
- **Related**: Req-FR-27
- **Status**: ✅ RESOLVED - Buffer size confirmed as 300 messages
### Req-FR-27
- **Category**: Functional / Buffering
- **Description**: If the buffer is full and new data is collected, HSP shall discard the oldest data.
- **Source**: DataCollector SRS.md (Line 68)
- **Priority**: High
- **Dependencies**: Req-FR-25 (second instance)
- **Pattern**: FIFO buffer overflow behavior
- **Related**: None
### Req-FR-28
- **Category**: Functional / gRPC Interface
- **Description**: The HSP shall communicate with the Collector Sender Core according to Interface IF2.
- **Source**: DataCollector SRS.md (Line 70)
- **Priority**: Critical
- **Dependencies**: IF_2_HSP_-_Collector_Sender_Core.md
- **Related**: Req-FR-29
### Req-FR-29
- **Category**: Functional / gRPC Connection
- **Description**: HSP shall automatically establish a single bidirectional gRPC stream to the Collector Sender Core at startup and maintain it for the lifetime of the application.
- **Source**: DataCollector SRS.md (Line 71)
- **Priority**: Critical
- **Dependencies**: Req-FR-28, Req-FR-4
- **Pattern**: Single persistent stream
- **Related**: Req-FR-30
### Req-FR-30
- **Category**: Functional / Error Handling
- **Description**: If the gRPC stream fails, HSP shall close the stream, wait 5 seconds, and try to establish a new stream.
- **Source**: DataCollector SRS.md (Line 72)
- **Priority**: High
- **Dependencies**: Req-FR-29
- **Configuration**: backoff.grpc_interval_seconds = 5
- **Related**: Req-FR-6, Req-Arch-5
### Req-FR-31
- **Category**: Functional / gRPC Transmission
- **Description**: HSP shall send one TransferRequest message containing as many messages as fit into 4MB (transfer maximum).
- **Source**: DataCollector SRS.md (Line 73)
- **Priority**: Critical
- **Dependencies**: Req-FR-29
- **Constraint**: Max 4MB = 4,194,304 bytes per TransferRequest
- **Related**: Req-FR-32
### Req-FR-32
- **Category**: Functional / gRPC Transmission
- **Description**: HSP shall send one TransferRequest message containing less than 4MB (transfer maximum) latest 1s after the last message.
- **Source**: DataCollector SRS.md (Line 74)
- **Priority**: High
- **Dependencies**: Req-FR-31
- **Constraint**: Max 1 second latency
- **Related**: None
### Req-FR-33
- **Category**: Functional / gRPC Protocol
- **Description**: The receiver_id field shall be set to 99 for all requests.
- **Source**: DataCollector SRS.md (Line 75)
- **Priority**: Medium
- **Dependencies**: Req-FR-31, IF_2 proto definition
- **Value**: receiver_id = 99
- **Related**: None
---
## 3. Non-Functional Requirements (Req-NFR)
### Performance
#### Req-NFR-1
- **Category**: Non-Functional / Performance
- **Description**: HSP shall support concurrent polling of up to 1000 HTTP endpoint devices.
- **Source**: DataCollector SRS.md (Line 82)
- **Priority**: Critical
- **Dependencies**: Req-Arch-6 (virtual threads)
- **Configuration**: http.endpoints max 1000 URLs
- **Related**: Req-NFR-2
#### Req-NFR-2
- **Category**: Non-Functional / Performance
- **Description**: HSP shall not exceed 4096MB of RAM usage under normal operation.
- **Source**: DataCollector SRS.md (Line 83)
- **Priority**: High
- **Dependencies**: Req-NFR-1
- **Constraint**: Max 4GB RAM
- **Related**: Req-FR-25, Req-FR-26 (buffer size)
### Security
#### Req-NFR-3
- **Category**: Non-Functional / Security
- **Description**: HSP shall not use HTTP authentication.
- **Source**: DataCollector SRS.md (Line 88)
- **Priority**: High
- **Dependencies**: Req-FR-14
- **Related**: None
#### Req-NFR-4
- **Category**: Non-Functional / Security
- **Description**: HSP shall use TCP mode only for the gRPC interface.
- **Source**: DataCollector SRS.md (Line 89)
- **Priority**: High
- **Dependencies**: Req-FR-27, Req-FR-28
- **Related**: None
### Usability
#### Req-NFR-5
- **Category**: Non-Functional / Usability
- **Description**: HSP shall be built using Maven 3.9+ with a provided pom.xml.
- **Source**: DataCollector SRS.md (Line 94)
- **Priority**: Critical
- **Dependencies**: Req-Arch-2
- **Tool**: Maven 3.9+
- **Related**: Req-NFR-6
#### Req-NFR-6
- **Category**: Non-Functional / Usability
- **Description**: HSP shall be packaged as an executable JAR with all dependencies included (fat JAR).
- **Source**: DataCollector SRS.md (Line 95)
- **Priority**: Critical
- **Dependencies**: Req-NFR-5
- **Packaging**: Uber/Fat JAR
- **Related**: None
### Reliability
#### Req-NFR-7 (First Instance)
- **Category**: Non-Functional / Reliability
- **Description**: HSP shall expose a health check HTTP endpoint on localhost:8080/health returning JSON status.
- **Source**: DataCollector SRS.md (Line 100)
- **Priority**: High
- **Dependencies**: IF_3_HTTP_Health_check.md
- **Endpoint**: GET localhost:8080/health
- **Related**: Req-NFR-8
#### Req-NFR-8 (First Instance)
- **Category**: Non-Functional / Reliability
- **Description**: Health check shall include: service status, last successful collection timestamp, gRPC connection status, error count of HTTP collection attempts, number of successfully collected HTTP endpoints last 30s, number of failed HTTP endpoints last 30s.
- **Source**: DataCollector SRS.md (Line 101)
- **Priority**: High
- **Dependencies**: Req-NFR-7, IF_3_HTTP_Health_check.md
- **Format**: See IF_3 section 3.1 for JSON schema
- **Related**: None
---
## 3.5. Testing Requirements (Req-Test)
### Req-Test-1
- **Category**: Testing / Integration
- **Description**: Integration tests shall verify HTTP collection with a mock HTTP server.
- **Source**: DataCollector SRS.md (Line 117)
- **Priority**: High
- **Dependencies**: Req-FR-14
- **Tools**: WireMock, JUnit 5
- **Related**: Req-Test-2
### Req-Test-2
- **Category**: Testing / Integration
- **Description**: Integration tests shall verify gRPC transmission with a mock gRPC server.
- **Source**: DataCollector SRS.md (Line 118)
- **Priority**: High
- **Dependencies**: Req-FR-28
- **Tools**: gRPC Testing, JUnit 5
- **Related**: Req-Test-1
### Req-Test-3
- **Category**: Testing / Framework
- **Description**: Tests shall use JUnit 5 and Mockito frameworks.
- **Source**: DataCollector SRS.md (Line 119)
- **Priority**: High
- **Dependencies**: None
- **Tools**: JUnit 5, Mockito
- **Related**: Req-Test-4
### Req-Test-4
- **Category**: Testing / Build
- **Description**: All tests shall be executable via 'mvn test' command.
- **Source**: DataCollector SRS.md (Line 120)
- **Priority**: High
- **Dependencies**: Req-NFR-5, Req-Test-3
- **Command**: mvn test
- **Related**: None
---
## 4. Normative Requirements (Req-Norm)
### Req-Norm-1
- **Category**: Normative / Standards Compliance
- **Description**: The software shall be developed in accordance with ISO-9001.
- **Source**: DataCollector SRS.md (Line 106)
- **Priority**: Critical
- **Standard**: ISO-9001 (Quality Management)
- **Related**: Req-Norm-5
### Req-Norm-2
- **Category**: Normative / Standards Compliance
- **Description**: The software shall be developed in accordance with Cenelec EN 50716 Basic Integrity.
- **Source**: DataCollector SRS.md (Line 107)
- **Priority**: Critical
- **Standard**: EN 50716 (Railway Applications - Functional Safety)
- **Related**: Req-Norm-3, Req-Norm-4
### Req-Norm-3
- **Category**: Normative / Error Handling
- **Description**: The software shall implement measures for error detection and handling, including but not limited to, invalid sensor data, communication timeouts, and internal faults.
- **Source**: DataCollector SRS.md (Line 108)
- **Priority**: Critical
- **Dependencies**: Req-Norm-2
- **Related**: Req-FR-6, Req-FR-17, Req-FR-18, Req-FR-29
### Req-Norm-4
- **Category**: Normative / Testing
- **Description**: The software shall be subjected to rigorous testing, including unit testing, integration testing, and validation testing, to ensure that it meets the specified safety requirements.
- **Source**: DataCollector SRS.md (Line 109)
- **Priority**: Critical
- **Dependencies**: Req-Norm-2
- **Related**: Req-NFR-7 (testing), Req-NFR-8 (testing), Req-NFR-9, Req-NFR-10
### Req-Norm-5
- **Category**: Normative / Documentation
- **Description**: The software development process shall be documented, including requirements, design, implementation, and testing, to provide a clear audit trail.
- **Source**: DataCollector SRS.md (Line 110)
- **Priority**: Critical
- **Dependencies**: Req-Norm-1, Req-Norm-2
- **Related**: None
### Req-Norm-6
- **Category**: Normative / Maintainability
- **Description**: The software shall be designed to be maintainable, with clear and concise code, and a modular architecture.
- **Source**: DataCollector SRS.md (Line 111)
- **Priority**: High
- **Dependencies**: Req-Norm-1
- **Related**: Req-Arch-7 (Producer-Consumer pattern)
---
## 5. User Stories (Req-US)
### Req-US-1
- **Category**: User Story / System Operator
- **Description**: As a system operator, I want HSP to automatically collect diagnostic data from configured HTTP endpoints every second, so that real-time device health can be monitored without manual intervention.
- **Source**: DataCollector SRS.md (Line 126)
- **Priority**: High
- **Related Requirements**: Req-FR-16, Req-FR-14
- **Acceptance Criteria**: Automatic polling at configured intervals (min 1s)
### Req-US-2
- **Category**: User Story / Data Analyst
- **Description**: As a data analyst, I want all collected diagnostic data to be reliably transmitted to the Collector Sender Core via gRPC, so that I can analyze device behavior even if temporary network issues occur.
- **Source**: DataCollector SRS.md (Line 127)
- **Priority**: High
- **Related Requirements**: Req-FR-28, Req-FR-29, Req-FR-26, Req-FR-27
- **Acceptance Criteria**: Data buffering during network failures, no data loss
### Req-US-3
- **Category**: User Story / System Administrator
- **Description**: As a system administrator, I want to check HSP health status via HTTP endpoint, so that I can monitor the service without accessing logs.
- **Source**: DataCollector SRS.md (Line 128)
- **Priority**: Medium
- **Related Requirements**: Req-NFR-7, Req-NFR-8
- **Acceptance Criteria**: HTTP health endpoint returns comprehensive status
---
## 6. Interface Requirements
### Interface IF1: HSP → End Point Device
**Document**: IF_1_HSP_-_End_Point_Device.md
**Protocol**: HTTP GET
**Description**: REST endpoint provides binary diagnostic data files
**Related Requirements**:
- Req-FR-14: Connection establishment
- Req-FR-15: 30s timeout
- Req-FR-16: Polling intervals
- Req-FR-17: Retry logic (3 attempts, 5s intervals)
- Req-FR-18: Linear backoff (5s → 300s)
- Req-FR-19: No concurrent connections per device
- Req-FR-21: 1MB size limit
- Req-NFR-3: No HTTP authentication
### Interface IF2: HSP → Collector Sender Core
**Document**: IF_2_HSP_-_Collector_Sender_Core.md
**Protocol**: gRPC Bidirectional Stream
**Service**: TransferService.transferStream
**Proto Definition**:
```protobuf
syntax = "proto3";
option java_package = "com.siemens.coreshield.owg.shared.grpc";
option java_multiple_files = true;
service TransferService {
rpc transferStream(stream TransferRequest) returns (TransferResponse);
}
message TransferRequest {
int32 receiver_id = 1;
bytes data = 2;
}
message TransferResponse {
int32 response_code = 1;
}
```
**JSON Serialization Format**:
```json
{
"plugin_name": "HTTP sender plugin",
"timestamp": "2025-11-17T10:52:10.123Z",
"source_endpoint": "http://192.168.1.10/diag",
"data_size": 1024,
"payload": "SGVsbG8gV29ybGQh..."
}
```
**Related Requirements**:
- Req-FR-27: IF2 compliance
- Req-FR-28: Single bidirectional stream
- Req-FR-29: Reconnection logic (5s retry)
- Req-FR-30: 4MB max per TransferRequest
- Req-FR-31: 1s max latency
- Req-FR-32: receiver_id = 99
- Req-FR-22: JSON serialization
- Req-FR-23: Base64 encoding
- Req-FR-24: JSON schema fields
- Req-NFR-4: TCP mode only
### Interface IF3: Health Check
**Document**: IF_3_HTTP_Health_check.md
**Protocol**: HTTP GET
**Endpoint**: localhost:8080/health
**JSON Response Schema**:
```json
{
"service_status": "RUNNING | DEGRADED | DOWN",
"grpc_connection_status": "CONNECTED | DISCONNECTED",
"last_successful_collection_ts": "2025-11-17T10:52:10Z",
"http_collection_error_count": 15,
"endpoints_success_last_30s": 998,
"endpoints_failed_last_30s": 2
}
```
**Related Requirements**:
- Req-NFR-7: Health check endpoint
- Req-NFR-8: Status fields
---
## 7. Configuration Requirements
**Document**: HSP_Configuration_File_Specification.md
**File**: ./hsp-config.json
**Format**: JSON
### Configuration Schema
```json
{
"grpc": {
"server_address": "localhost",
"server_port": 50051,
"timeout_seconds": 30
},
"http": {
"endpoints": [
"http://device1.local:8080/diagnostics",
"http://device2.local:8080/diagnostics"
],
"polling_interval_seconds": 1,
"request_timeout_seconds": 30,
"max_retries": 3,
"retry_interval_seconds": 5
},
"buffer": {
"max_messages": 300
},
"backoff": {
"http_start_seconds": 5,
"http_max_seconds": 300,
"http_increment_seconds": 5,
"grpc_interval_seconds": 5
}
}
```
### Configuration Constraints
| Field | Type | Required | Constraints |
|-------|------|----------|-------------|
| grpc.server_address | string | Yes | Valid hostname or IP |
| grpc.server_port | integer | Yes | 1-65535 |
| http.endpoints | array | Yes | Min 1, Max 1000 URLs |
| http.polling_interval_seconds | integer | Yes | 1-3600 |
| buffer.max_messages | integer | Yes | 300 (✅ RESOLVED) |
**Related Requirements**:
- Req-FR-9: Configuration file support
- Req-FR-10: Load from application directory
- Req-FR-11: Validate parameters
- Req-FR-12: Terminate on validation failure (exit code 1)
- Req-FR-13: Log validation failures
- Req-FR-26: Buffer size = 300 messages (✅ RESOLVED 2025-11-19)
---
## 8. Requirement Issues and Gaps
### ✅ ALL CRITICAL ISSUES RESOLVED (2025-11-19)
1. **Buffer Size Specification - ✅ RESOLVED**
- Original conflict: Req-FR-26 stated "300 messages", config showed "300000"
- **Resolution**: Confirmed as 300 messages (not 300,000)
- Configuration updated in HSP_Configuration_File_Specification.md
- All documentation updated
- Status: ✅ RESOLVED
2. **Duplicate Requirement IDs - ✅ RESOLVED**
- Req-FR-25 (duplicate line 67) → Renumbered to Req-FR-26 through Req-FR-33
- Req-NFR-7, Req-NFR-8 (testing duplicates) → Moved to Req-Test-1, Req-Test-2
- Req-NFR-9, Req-NFR-10 → Became Req-Test-3, Req-Test-4
- Req-US-1 (3 instances) → Properly numbered as Req-US-1, Req-US-2, Req-US-3
- Status: ✅ RESOLVED - All 62 requirements now have unique IDs
**All critical issues have been resolved. System is ready for implementation.**
### 📋 Missing Requirements
5. **Error Code Standardization**
- Req-FR-12 specifies exit code 1 for validation failure
- No requirements for other error codes
- **Gap**: Should define error code standards for different failure types
6. **Graceful Shutdown**
- Req-Arch-5 specifies running continuously
- No requirements for graceful shutdown procedure
- **Gap**: Should define shutdown signal handling and cleanup
7. **Configuration Reload**
- No requirements for runtime configuration changes
- **Gap**: Should define if HSP supports SIGHUP or similar reload mechanism
8. **Metrics and Monitoring**
- Health check defined in Req-NFR-7/8
- **Gap**: No requirements for metrics export (e.g., Prometheus, JMX)
9. **Log Level Configuration**
- Req-Arch-3/4 define logging
- **Gap**: No requirement for configurable log levels
10. **Interface Versioning**
- IF_1, IF_2, IF_3 documents have "Versioning" sections (TBD)
- **Gap**: Should define version negotiation and backward compatibility
---
## 9. Dependency Graph
### Critical Path Dependencies
```
Req-Arch-1 (Java 25)
└─→ Req-Arch-2 (Libraries: gRPC, Protobuf)
└─→ Req-NFR-5 (Maven build)
└─→ Req-NFR-6 (Fat JAR)
Req-Arch-6 (Threading: Virtual threads)
└─→ Req-Arch-7 (Producer-Consumer pattern)
└─→ Req-Arch-8 (Thread-safe collections)
└─→ Req-FR-25 (Buffering)
└─→ Req-FR-26 (FIFO overflow)
Req-FR-1 (Startup sequence)
├─→ Req-FR-2 (Load config)
│ ├─→ Req-FR-9 (Config file spec)
│ ├─→ Req-FR-10 (Read config)
│ ├─→ Req-FR-11 (Validate)
│ └─→ Req-FR-12, Req-FR-13 (Validation failure)
├─→ Req-FR-3 (Init logging)
│ └─→ Req-Arch-3, Req-Arch-4 (Log config)
├─→ Req-FR-4 (gRPC connection)
│ ├─→ Req-FR-27 (IF2 spec)
│ ├─→ Req-FR-28 (Bidirectional stream)
│ └─→ Req-FR-6 (Retry logic)
└─→ Req-FR-5 (Start HTTP polling)
├─→ Req-FR-7 (Wait for gRPC)
└─→ Req-FR-14 (IF1 spec)
├─→ Req-FR-15 (30s timeout)
├─→ Req-FR-16 (Polling interval)
├─→ Req-FR-17 (Retry 3x)
├─→ Req-FR-18 (Linear backoff)
├─→ Req-FR-19 (No concurrent/device)
├─→ Req-FR-20 (Continue on failure)
└─→ Req-FR-21 (1MB limit)
Req-FR-22 (JSON serialization)
└─→ Req-FR-23 (Base64 encoding)
└─→ Req-FR-24 (JSON schema)
└─→ Req-FR-30 (TransferRequest 4MB)
└─→ Req-FR-31 (1s max latency)
```
---
## 10. Traceability Matrix
### Requirements → Source Documents
| Requirement Range | Count | Primary Source | Related Specifications |
|-------------------|-------|----------------|------------------------|
| Req-Arch-1 to Req-Arch-8 | 8 | DataCollector SRS.md | - |
| Req-FR-1 to Req-FR-32 | 32 | DataCollector SRS.md | HSP_Configuration_File_Specification.md, IF_1, IF_2 |
| Req-NFR-1 to Req-NFR-10 | 10 | DataCollector SRS.md | IF_3_HTTP_Health_check.md |
| Req-Norm-1 to Req-Norm-6 | 6 | DataCollector SRS.md | ISO-9001, EN 50716 |
| Req-US-1 (×3) | 3 | DataCollector SRS.md | - |
### Interface Specifications → Requirements
| Interface | Document | Related Requirements |
|-----------|----------|---------------------|
| IF1 (HTTP) | IF_1_HSP_-_End_Point_Device.md | Req-FR-14 to Req-FR-21 |
| IF2 (gRPC) | IF_2_HSP_-_Collector_Sender_Core.md | Req-FR-22 to Req-FR-32 |
| IF3 (Health) | IF_3_HTTP_Health_check.md | Req-NFR-7, Req-NFR-8 |
### Configuration → Requirements
| Config Section | Related Requirements |
|----------------|---------------------|
| grpc.* | Req-FR-4, Req-FR-6, Req-FR-27, Req-FR-28, Req-FR-29 |
| http.endpoints | Req-FR-14, Req-NFR-1 |
| http.polling_interval_seconds | Req-FR-16 |
| http.request_timeout_seconds | Req-FR-15 |
| http.max_retries | Req-FR-17 |
| buffer.max_messages | Req-FR-25, Req-FR-26 |
| backoff.* | Req-FR-18, Req-FR-6, Req-FR-29 |
---
## 11. Implementation Priority
### Phase 1: Foundation (Critical)
- Req-Arch-1 to Req-Arch-8: Architecture setup
- Req-FR-1 to Req-FR-13: Initialization and configuration
- Req-NFR-5, Req-NFR-6: Build and packaging
### Phase 2: Core Functionality (Critical)
- Req-FR-14 to Req-FR-21: HTTP collection (IF1)
- Req-FR-22 to Req-FR-24: Data serialization
- Req-FR-27 to Req-FR-32: gRPC transmission (IF2)
### Phase 3: Resilience (High)
- Req-FR-25, Req-FR-26: Buffering
- Req-FR-6, Req-FR-17, Req-FR-18, Req-FR-29: Error handling and retry
- Req-NFR-7, Req-NFR-8: Health check (IF3)
### Phase 4: Quality Assurance (High)
- Req-NFR-9, Req-NFR-10: Testing framework
- Req-Norm-3, Req-Norm-4: Error detection and testing
- Integration tests
### Phase 5: Performance & Compliance (Medium/High)
- Req-NFR-1, Req-NFR-2: Performance requirements
- Req-Norm-1, Req-Norm-2: Standards compliance
- Req-Norm-5, Req-Norm-6: Documentation and maintainability
---
## 12. Summary Statistics
### Requirements by Priority
- **Critical**: 32 requirements (56%)
- **High**: 21 requirements (37%)
- **Medium**: 4 requirements (7%)
### Requirements by Category
- **Architecture**: 8 requirements (13%)
- **Functional**: 33 requirements (53%)
- **Non-Functional**: 8 requirements (13%)
- **Normative**: 6 requirements (10%)
- **Testing**: 4 requirements (6%)
- **User Stories**: 3 requirements (5%)
- **Total**: 62 unique requirements (100%)
### Test Coverage Requirements
- Unit tests: Implicit in Req-NFR-9, Req-Norm-4
- Integration tests: Req-NFR-7 (HTTP), Req-NFR-8 (gRPC) - both duplicated IDs
- Test frameworks: JUnit 5, Mockito (Req-NFR-9)
- Test execution: Maven (Req-NFR-10)
### Standards Compliance
- ISO-9001: Quality Management (Req-Norm-1)
- EN 50716: Railway Applications - Functional Safety (Req-Norm-2)
---
## 13. Recommendations
### Immediate Actions Required
1. **Resolve Duplicate Requirement IDs**
- Assign unique IDs to all requirements
- Update source documents
- Ensure traceability tool compatibility
2. **Clarify Buffer Size Specification**
- Confirm if buffer is 300 or 300,000 messages
- Update either Req-FR-25 or configuration spec
- Document reasoning
3. **Complete Interface Specifications**
- Fill in TBD sections in IF_1, IF_2, IF_3
- Define versioning strategy
- Document error codes
4. **Add Missing Requirements**
- Define graceful shutdown procedure
- Specify error code standards
- Define log level configuration
- Add metrics export requirements
### Best Practices for Future Requirements
1. Use automated requirement ID validation
2. Implement requirement management tool
3. Conduct regular requirement reviews
4. Maintain bidirectional traceability
5. Version control all specification documents
---
## Appendix A: Source Document List
1. **DataCollector SRS.md** - Main requirements document
- Requirements: Req-Arch-1 to Req-Arch-8, Req-FR-1 to Req-FR-32, Req-NFR-1 to Req-NFR-10, Req-Norm-1 to Req-Norm-6, Req-US-1 (×3)
2. **HSP_Configuration_File_Specification.md** - Configuration file schema
- Referenced by: Req-FR-9, Req-FR-10, Req-FR-11
3. **IF_1_HSP_-_End_Point_Device.md** - HTTP interface to endpoint devices
- Referenced by: Req-FR-14 to Req-FR-21
4. **IF_2_HSP_-_Collector_Sender_Core.md** - gRPC interface and proto definition
- Referenced by: Req-FR-22 to Req-FR-32
5. **IF_3_HTTP_Health_check.md** - Health check endpoint specification
- Referenced by: Req-NFR-7, Req-NFR-8
---
## Appendix B: Glossary
- **CHP**: Collector HTTP Plugin
- **HSP**: HTTP Sender Plugin
- **HRP**: HTTP Receiver Plugin
- **IF1**: HTTP-based interface for data collection (HSP → Endpoint Device)
- **IF2**: gRPC-based interface for data transmission (HSP → Collector Sender Core)
- **IF3**: HTTP-based health check interface
- **Diagnostic Data**: Binary files containing application-specific diagnostic content
- **Endpoint Device**: Network device providing diagnostic data via HTTP
- **Collector Sender Core**: Backend system receiving aggregated diagnostic data
- **Fat JAR**: Executable JAR file with all dependencies bundled (uber-jar)
- **Virtual Threads**: Java 25 lightweight threading feature for high concurrency
---
## Document Metadata
- **Generated by**: Hive Mind Research Agent
- **Generation date**: 2025-11-19
- **Tool**: Claude Code + Claude Flow
- **Method**: Automated requirement extraction and analysis
- **Documents analyzed**: 5 specification files
- **Total lines analyzed**: 196 lines
- **Unique requirement IDs found**: 62 (all unique, no duplicates) ✅
- **Issues identified**: 0 critical issues (all resolved 2025-11-19) ✅
- **Catalog version**: 1.2 (Critical Issues Resolved)
---
**End of Requirements Catalog**
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