hackathon/docs/OPEN_POINTS_SUMMARY.md

HSP Implementation - Open Points Summary

Generated: 2025-11-20 Current Status: 60-70% complete, 260/288 tests passing (90.3%)

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🚨 CRITICAL BLOCKERS (Cannot Run Application)

1. HspApplication Main Class ❌ NOT IMPLEMENTED

File: src/main/java/com/siemens/coreshield/hsp/HspApplication.java Status: Missing Priority: BLOCKER - Application cannot start without main entry point Requirements: Req-FR-1 to FR-8, Req-Arch-5 Deliverables:

• Main method with startup sequence
• Dependency injection (manual or framework)
• Component initialization order:
  1. Load configuration (ConfigurationFileAdapter)
  2. Validate configuration (ConfigurationValidator)
  3. Initialize BufferManager
  4. Connect to gRPC (retry loop 5s until success)
  5. Start HealthCheckController (HTTP server on port 8080)
  6. Start DataCollectionService (HTTP polling)
  7. Start DataTransmissionService (gRPC transmission)
• Graceful shutdown hooks
• Signal handling (SIGTERM, SIGINT)

Estimated Effort: 3 days (Phase 3.7) Plan Reference: PROJECT_IMPLEMENTATION_PLAN.md lines 390-405

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2. HealthCheckController ❌ NOT IMPLEMENTED

File: src/main/java/com/siemens/coreshield/hsp/adapter/inbound/health/HealthCheckController.java Status: Missing Priority: CRITICAL - Required for production monitoring Requirements: Req-NFR-7, NFR-8 Deliverables:

• HTTP server (embedded Jetty or similar)
• GET /health endpoint on localhost:8080
• JSON response with 6 required fields:

  {
    "status": "healthy|degraded|unhealthy",
    "timestamp": "ISO8601 timestamp",
    "uptime": "duration in seconds",
    "components": {
      "http_polling": "healthy|unhealthy",
      "grpc_stream": "healthy|unhealthy",
      "buffer": "healthy|unhealthy"
    },
    "metrics": {
      "total_polls": 12345,
      "successful_polls": 12000,
      "failed_polls": 345,
      "buffer_usage": 75,
      "grpc_connected": true
    }
  }
  

• Service status aggregation logic
• Dependency health checks
• Integration tests with HTTP client

Estimated Effort: 2 days (Phase 3.6) Plan Reference: PROJECT_IMPLEMENTATION_PLAN.md lines 373-386

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🔴 HIGH PRIORITY (Feature Incomplete)

3. DataTransmissionService Test Failures ⚠️ 5 FAILURES

File: src/main/java/com/siemens/coreshield/hsp/application/DataTransmissionService.java Status: Partial implementation (24/29 tests passing) Priority: HIGH - Core transmission logic incomplete Failing Tests:

1. DataTransmissionServiceTest$GracefulShutdownTests: 1 failure
2. DataTransmissionServiceTest$ErrorHandlingTests: 1 failure
3. DataTransmissionServiceTest$ReconnectionLogicTests: 1 failure
4. DataTransmissionServiceTest$GrpcStreamLifecycleTests: 1 failure
5. DataTransmissionServiceTest$BatchAccumulationTests: 1 failure

Root Cause: gRPC lifecycle management and batch accumulation logic Impact: Data transmission may not handle failures/reconnections correctly Estimated Effort: 1-2 days

Additional Issue: DataTransmissionServiceIntegrationTest has 3 failures

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4. ConfigurationFileAdapter Errors ⚠️ 3 ERRORS

File: src/main/java/com/siemens/coreshield/hsp/adapter/inbound/config/ConfigurationFileAdapter.java Status: Partial (8/11 tests passing) Priority: HIGH - Configuration loading broken Failing Tests:

1. shouldUseDefaultValues_forOptionalFields: NullPointerException (pollingInterval null)
2. shouldValidateHttpEndpoints_notEmpty: RuntimeException (JSON parsing error)
3. shouldValidateBufferSize_isPositive: NumberFormatException (empty string parsing)

Root Cause: JSON parsing and default value handling Impact: Cannot load configuration from file correctly Estimated Effort: 0.5 days

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🟡 MEDIUM PRIORITY (Test Infrastructure)

5. DataCollectionServiceIntegrationTest ⚠️ 6 ERRORS

File: src/test/java/.../DataCollectionServiceIntegrationTest.java Status: Not functional (0/6 tests passing) Priority: MEDIUM - Integration test infrastructure Root Cause: WireMock server setup issues Impact: Cannot validate end-to-end HTTP collection flow Estimated Effort: 0.5 days

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6. DataCollectionServicePerformanceTest ⚠️ 6 ERRORS

File: src/test/java/.../DataCollectionServicePerformanceTest.java Status: Not functional (0/6 tests passing) Priority: MEDIUM - Performance validation Root Cause: Test setup/initialization issues Impact: Cannot verify 1000 concurrent endpoint requirement Estimated Effort: 0.5 days

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🟢 LOW PRIORITY (Minor Issues)

7. GrpcStreamingAdapterTest ⚠️ 1 FAILURE

File: src/main/java/.../GrpcStreamingAdapter.java Status: Nearly complete (10/11 tests passing) Priority: LOW - Test bug, not production issue Failing Test: shouldFailToSend_whenNotConnected Root Cause: Test expects IllegalStateException but production throws GrpcStreamException Fix: Update test expectation to match production behavior Estimated Effort: 0.1 days

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8. DiagnosticDataTest JSON Serialization ⚠️ 1 ERROR

File: src/main/java/.../DiagnosticData.java Status: Nearly complete Priority: LOW - JSON serialization issue Estimated Effort: 0.2 days

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9. HealthCheckResponseTest JSON Serialization ⚠️ 1 FAILURE

File: src/main/java/.../HealthCheckResponse.java Status: Nearly complete Priority: LOW - JSON serialization issue Estimated Effort: 0.2 days

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10. Port Interface Test Bugs ⚠️ 2 FAILURES

Files:

• IConfigurationPortTest.java (1 failure - exception type mismatch)
• IHttpPollingPortTest.java (1 failure)

Priority: LOW - Test bugs, not production issues Estimated Effort: 0.1 days each

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🔵 OPTIONAL ENHANCEMENTS

11. ExponentialBackoffAdapter ❌ NOT IMPLEMENTED

File: src/main/java/.../ExponentialBackoffAdapter.java Status: Not implemented Priority: OPTIONAL - Enhancement to linear backoff Requirements: Req-FR-18 (enhanced) Impact: Currently using linear backoff (5s → 300s), exponential would be better Estimated Effort: 1 day (Phase 3.2)

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📊 Summary Statistics

Category	Count
CRITICAL Blockers	2
HIGH Priority	2
MEDIUM Priority	2
LOW Priority	4
OPTIONAL	1
TOTAL Open Points	11

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🎯 Recommended Sequence

Sprint 1: Make Application Runnable (5-6 days)

1. Implement HspApplication main class (3 days) - BLOCKER
2. Implement HealthCheckController (2 days) - CRITICAL
3. Fix ConfigurationFileAdapter errors (0.5 days) - HIGH

Deliverable: Runnable application with health check endpoint

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Sprint 2: Fix Core Services (2-3 days)

4. Fix DataTransmissionService test failures (1-2 days) - HIGH
5. Fix DataCollectionServiceIntegrationTest (0.5 days) - MEDIUM
6. Fix DataCollectionServicePerformanceTest (0.5 days) - MEDIUM

Deliverable: 100% test pass rate, validated core services

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Sprint 3: Polish & Enhancements (1-2 days)

7. Fix low-priority test bugs (0.5 days)
8. Fix JSON serialization issues (0.4 days)
9. Optional: Implement ExponentialBackoffAdapter (1 day)

Deliverable: Production-ready with all tests passing

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📋 Test Coverage Goals

Current: 260/288 tests passing (90.3%) Target: 288/288 tests passing (100%) Coverage: Target 95% line, 90% branch (to be measured with JaCoCo)

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✅ What's Already Complete

Phase 1: Foundation ✅ 100%

• Maven project setup
• 8 port interfaces
• 8 domain models (mostly complete)
• Rate limiting implementation (11/11 tests ✅)
• Backpressure controller (29/29 tests ✅)

Phase 2: Core Services ✅ 80%

• ConfigurationManager (12/12 tests ✅)
• ConfigurationValidator (11/11 tests ✅)
• BufferManager (21/21 tests ✅)
• CollectionStatistics ✅
• DataCollectionService (15/15 unit tests ✅)
• DataTransmissionService (24/29 tests, needs fixes)

Phase 3: Adapters 🟡 60%

• HttpPollingAdapter (10/10 tests ✅)
• RateLimitedHttpPollingAdapter (11/11 tests ✅)
• FileLoggingAdapter (11/11 tests ✅)
• GrpcStreamingAdapter (10/11 tests, minor fix needed)
• ConfigurationFileAdapter (8/11 tests, needs fixes)

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Next Action: Start Sprint 1 - Implement HspApplication and HealthCheckController to make application runnable.