File Monitor - Documentation Index

Welcome to the File Monitor documentation. This index provides quick navigation to all documentation resources.

Quick Links

• 🚀 README.md - Start here for quick setup and examples
• 📊 implementation-summary.md - See what was built and why
• 🏗️ project-overview.md - Understand the architecture

Documentation Structure

Getting Started

1. README.md - User Guide
   • Quick start examples
   • Configuration options
   • Basic usage patterns
   • Performance characteristics
   • Platform support

Architecture & Design

2. project-overview.md - Technical Overview

   • Complete project structure
   • Module responsibilities
   • Design decisions
   • Development workflow
   • Testing strategy

3. docs/adr/001-event-processing-architecture.md - Architecture Decision Record

   • Key architectural decisions
   • Rationale for each choice
   • Trade-offs considered
   • Alternatives evaluated
   • Performance targets

Operations & Deployment

4. docs/production.md - Production Guide
   • Pre-deployment checklist
   • Platform-specific configuration
   • Performance tuning
   • Monitoring and alerting
   • Operational procedures
   • Troubleshooting guide

Implementation Details

5. implementation-summary.md - Build Summary
   • What was created
   • Critical fixes applied
   • Before/after comparison
   • Lines of code breakdown
   • Migration path

Code Organization

Source Code (src/)

File	Purpose	Key Features
lib.rs	Public API	Documentation, exports
monitor.rs	Orchestration	Lifecycle management
processor.rs	Event pipeline	Rate limiting, debouncing
checksum.rs	Hash calculation	Streaming SHA-256
rate_limiter.rs	Backpressure	Semaphore-based
debouncer.rs	Deduplication	Time-based windows
lifecycle.rs	Shutdown	Graceful coordination
observability.rs	Metrics	Prometheus-compatible
config.rs	Configuration	Validation, defaults
events.rs	Event types	Serialization
error.rs	Error handling	Domain errors

Tests (tests/)

File	Purpose	Coverage
integration_tests.rs	E2E tests	15+ scenarios

Examples (examples/)

File	Purpose	Features
monitor.rs	CLI app	Rich formatting, filtering

Development Resources

Build & Development

• Makefile - Development commands

  make help          # Show all commands
  make quick-check   # Pre-commit checks
  make test          # Run all tests
  make docs          # Generate documentation

• cargo.toml - Dependencies and metadata

  • Production dependencies
  • Development tools
  • Build configuration

• .github/workflows/ci.yml - CI Pipeline

  • Multi-platform testing
  • Code quality checks
  • Coverage reporting
  • Security audits

Navigation by Role

For Users (Getting Started)

1. Read README.md for quick start
2. Check examples/monitor.rs for usage patterns
3. Review docs/production.md for deployment

For Developers (Contributing)

1. Review project-overview.md for architecture
2. Read docs/adr/001-event-processing-architecture.md for design rationale
3. Check Makefile for development workflow
4. Run make quick-check before committing

For Operators (Deploying)

1. Start with docs/production.md
2. Review README.md configuration section
3. Set up monitoring per metrics guide
4. Configure alerts per operational procedures

For Architects (Evaluating)

1. Read implementation-summary.md for comparison
2. Review docs/adr/001-event-processing-architecture.md for decisions
3. Check project-overview.md for details
4. Examine source code structure

Key Concepts

Architecture Patterns

• Event-driven: Asynchronous event processing
• Pipeline: Multi-stage processing with gates
• Circuit breaker: Rate limiting with backpressure
• Graceful degradation: Drop events vs crash

Reliability Features

• Rate limiting: Semaphore-based concurrency control
• Debouncing: Time-window event deduplication
• Streaming: Constant-memory checksum calculation
• Graceful shutdown: Coordinated lifecycle with drain

Observability

• Metrics: Prometheus-compatible counters, gauges, histograms
• Tracing: Structured logging via tracing crate
• Health checks: Runtime status reporting
• Error context: Rich error information

Common Tasks

Running Examples

# Basic monitoring
cargo run --example monitor -- /path/to/watch

# With options
cargo run --example monitor -- /path/to/watch \
    --recursive \
    --checksums \
    --debounce 1000 \
    --format json

Running Tests

make test                 # All tests
make test-verbose         # With logging
make test-integration     # Integration only

Generating Documentation

make docs                 # Generate and open
cargo doc --no-deps       # Just library docs

Checking Code Quality

make quick-check          # Format + lint
make ci                   # Full CI checks
cargo clippy              # Linting only
cargo fmt                 # Formatting only

Related Documentation

External References

• notify crate - File system watcher
• tokio - Async runtime
• tracing - Structured logging
• metrics - Metrics collection

Platform Documentation

• Linux: inotify(7) man page
• macOS: FSEvents framework
• Windows: ReadDirectoryChangesW API

Support

• Issues: GitHub Issues tracker
• Discussions: GitHub Discussions
• Contributing: See development section in project-overview.md
• Security: Report via GitHub Security tab

Version History

• v0.1.0 (2025-01-06) - Initial production release
  • Cross-platform file monitoring
  • Rate limiting and debouncing
  • Streaming checksums
  • Graceful shutdown
  • Comprehensive observability
  • Full documentation suite

License

MIT OR Apache-2.0 - See LICENSE files

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Last Updated: 2025-01-06
Maintainer: File Monitor Team
Status: Production Ready