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CompilerCacheFS - TODO List

This document tracks all implementation tasks for the CompilerCacheFS project.

Summary

  • Total TODOs: 9
  • Completed: 8 ✅
  • In Progress: 0 🔄
  • Remaining: 1 ⏳
  • Critical Priority: 0 remaining (4 completed)
  • Medium Priority: 0 remaining (4 completed)
  • Low Priority: 1 remaining

Current Implementation Status

The project has achieved significant progress with all core caching, async download, and metrics components fully implemented and tested. The remaining work focuses on WinFsp integration and production deployment features.

Project TODOs

✅ Completed - Core Functionality

  • 3. Implement Proper Path Resolution (Completed: 2024-12-06)

    • File: src/hybrid_filesystem.cpp → src/main.cpp
    • Line: 286 → Implemented in testPathResolution()
    • Description: ✅ Implemented logic to resolve virtual paths like /msvc-14.40/bin/cl.exe to network UNC paths
    • Impact: Critical - required for multi-compiler support
    • Implementation: Isolated test function with comprehensive test cases
    • Test Command: CeWinFileCacheFS.exe --test-paths

  • 4. Implement Network Path Mapping (Completed: 2024-12-06)

    • File: src/hybrid_filesystem.cpp → src/main.cpp
    • Line: 250 → Implemented in testNetworkPathMapping()
    • Description: ✅ Implemented validation of network path mapping and UNC path construction
    • Impact: Critical - required for network access validation
    • Implementation: Isolated test function with comprehensive validation
    • Test Command: CeWinFileCacheFS.exe --test-network

  • 1. Implement Basic Caching Logic (Completed: 2024-12-13)

    • File: src/memory_cache_manager.cpp
    • Description: ✅ Implemented complete memory-based caching system with LRU eviction
    • Impact: Critical - core functionality for file caching
    • Implementation: Full MemoryCacheManager class with comprehensive testing
    • Test Command: ./run_all_tests.sh (cache_test)

  • 2. Implement LRU Eviction (Completed: 2024-12-13)

    • File: src/memory_cache_manager.cpp
    • Description: ✅ Implemented LRU eviction algorithm with configurable size limits
    • Impact: Critical - required for proper cache management
    • Implementation: Integrated into MemoryCacheManager with metrics tracking
    • Test Command: ./run_all_tests.sh (cache_test, cache_demo)

  • 5. Implement Async File Handling (Completed: 2024-12-13)

    • File: src/async_download_manager.cpp
    • Description: ✅ Implemented multi-threaded async download system with configurable worker pools
    • Impact: Medium - improves performance and responsiveness
    • Implementation: Complete AsyncDownloadManager with comprehensive testing and metrics
    • Test Command: ./run_all_tests.sh (async_test, filesystem_async_test)

  • Prometheus Metrics Integration (Completed: 2024-12-13)

    • File: src/metrics_collector.cpp, src/prometheus_metrics_impl.cpp
    • Description: ✅ Implemented comprehensive metrics collection with dynamic labels
    • Impact: Medium - enables monitoring and performance analysis
    • Implementation: Refactored from pimpl pattern to proper class separation
    • Test Command: ./run_all_tests.sh (metrics_test)

  • 7. Proper Glob Matching (Completed: 2025-01-14)

    • File: src/glob_matcher.cpp
    • Description: ✅ Implemented proper glob pattern matching with support for *, **, and ? patterns
    • Impact: Medium - enables flexible file filtering for cache policies
    • Implementation: Complete GlobMatcher class with comprehensive Catch2 unit tests (131 assertions)
    • Test Command: ./run_all_tests.sh (glob_test, glob_matcher_unit_test)

⏳ Remaining - Production Integration

  • WinFsp Integration
    • Description: Connect the implemented cache system to the WinFsp filesystem driver
    • Impact: Critical - required for production deployment
    • Implementation: Integrate MemoryCacheManager and AsyncDownloadManager with WinFsp callbacks
    • Dependencies: All core components completed ✅

⏳ Remaining - Future Enhancements

  • Enhanced Cache Policy Configuration
    • Description: Implement pattern-based caching rules and fine-grained control
    • Impact: Medium - enables more sophisticated caching strategies
    • Implementation: Build on existing JSON configuration system
    • Dependencies: WinFsp integration ⏳

Implementation Status Overview

✅ Phase 1 - Core Components (COMPLETED)

All essential caching and async components have been implemented and tested:

  1. Memory Cache Manager - Complete LRU caching system ✅
  2. Async Download Manager - Multi-threaded download system ✅
  3. Directory Tree Caching - Always-cached directory structure ✅
  4. Prometheus Metrics - Comprehensive metrics with dynamic labels ✅
  5. Configuration System - YAML parsing with validation ✅
  6. Test Infrastructure - Comprehensive test suite with automated runner ✅

🔄 Phase 2 - Production Integration (CURRENT)

Focus has shifted to connecting the implemented components to the filesystem driver:

  1. WinFsp Integration - Connect cache system to filesystem driver ⏳
  2. Production Deployment - Logging, monitoring, error recovery ⏳

📋 Phase 3 - Enhancement & Polish (FUTURE)

Future work focuses on advanced features and optimizations:

  1. Enhanced Cache Policies - Pattern-based caching rules ⏳
  2. Performance Optimization - Profile and optimize algorithms ⏳

Current Architecture Status

✅ Fully Implemented & Tested

  • Memory caching: LRU eviction, size limits, metrics integration
  • Async downloads: Configurable worker pools, stress tested
  • Directory navigation: Complete metadata caching
  • Metrics collection: Cache hits/misses, download performance, failure tracking
  • Configuration: YAML parsing, thread configuration, metrics setup
  • Cross-platform development: macOS test runner with 12 test programs + unit tests

🎯 Next Steps

The focus is now on production deployment rather than core functionality:

  1. Integrate existing components with WinFsp filesystem callbacks
  2. Add production logging and error recovery
  3. Implement proper error handling for network failures
  4. Add monitoring and alerting capabilities

Testing Infrastructure

Development Testing (macOS/Linux)

# Comprehensive test suite with all components
./run_all_tests.sh                   # Full test suite (10 programs)
./run_all_tests.sh --clean          # Clean build + test
./run_all_tests.sh --quick          # Skip CMake configuration

Production Testing (Windows)

# Configuration and path resolution tests
CeWinFileCacheFS.exe --test-config   # ✅ YAML configuration parsing
CeWinFileCacheFS.exe --test-paths    # ✅ Virtual path resolution  
CeWinFileCacheFS.exe --test-network  # ✅ Network path validation
CeWinFileCacheFS.exe --test          # ✅ All Windows-specific tests

Test Coverage

The project now has comprehensive test coverage for:

  • Memory cache operations and LRU eviction
  • Async download manager with stress testing (50+ concurrent downloads)
  • Prometheus metrics collection and validation
  • Directory tree caching and navigation
  • Configuration loading and validation
  • Edge cases (0 threads, rapid operations, shutdown scenarios)