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# SnmpKit v0.3.0 Release Notes

Release Date: 2024-12-19
Version: 0.3.0
Git Tag: v0.3.0

## 🎯 Major Features

### Unified API Architecture

The biggest change in v0.3.0 is the introduction of a unified API architecture that organizes all SnmpKit functionality into logical, discoverable modules:

- `SnmpKit.SNMP` - Complete SNMP protocol operations
- `SnmpKit.MIB` - Comprehensive MIB management
- `SnmpKit.Sim` - Realistic device simulation

This replaces the previous fragmented approach where functions were scattered across multiple modules, making the library much more intuitive and easier to use.

### Enhanced Module Organization

#### SnmpKit.SNMP

All SNMP operations are now organized under a single, comprehensive module:

    # Basic operations
    {:ok, value} = SnmpKit.SNMP.get("192.168.1.1", "sysDescr.0")
    {:ok, results} = SnmpKit.SNMP.walk("192.168.1.1", "system")

    # Bulk operations
    {:ok, data} = SnmpKit.SNMP.bulk_walk("192.168.1.1", "interfaces")

    # Multi-target operations
    {:ok, results} = SnmpKit.SNMP.get_multi([
      {"host1", "sysDescr.0"},
      {"host2", "sysUpTime.0"}
    ])

    # Pretty formatting
    {:ok, formatted} = SnmpKit.SNMP.get_pretty("192.168.1.1", "sysUpTime.0")

    # Async operations
    task = SnmpKit.SNMP.get_async("192.168.1.1", "sysDescr.0")

#### SnmpKit.MIB

Comprehensive MIB management with both high-level and low-level operations:

    # OID resolution
    {:ok, oid} = SnmpKit.MIB.resolve("sysDescr.0")
    {:ok, name} = SnmpKit.MIB.reverse_lookup([1, 3, 6, 1, 2, 1, 1, 1, 0])

    # High-level MIB compilation
    {:ok, compiled} = SnmpKit.MIB.compile("MY-MIB.mib")
    {:ok, _} = SnmpKit.MIB.load(compiled)

    # Low-level MIB operations
    {:ok, raw_compiled} = SnmpKit.MIB.compile_raw("MY-MIB.mib")

#### SnmpKit.Sim

Simplified device simulation interface:

    # Start individual devices
    {:ok, device} = SnmpKit.Sim.start_device(profile, port: 1161)

    # Create device populations
    {:ok, devices} = SnmpKit.Sim.start_device_population(device_configs)

### Backward Compatibility

All existing code continues to work! Common operations are still available directly on the main `SnmpKit` module:

    # These still work exactly as before
    {:ok, value} = SnmpKit.get("192.168.1.1", "sysDescr.0")
    {:ok, results} = SnmpKit.walk("192.168.1.1", "system")
    {:ok, oid} = SnmpKit.resolve("sysDescr.0")

## 📚 Documentation Improvements

### Updated README

- Complete rewrite showcasing the unified API
- Clear examples for each module
- Migration guide from other libraries
- Enterprise features section
- Performance optimization tips

### Interactive Livebook Tour

- Completely rewritten `snmpkit_tour.livemd`
- Now uses simulated devices for all examples
- No external network dependencies
- Comprehensive coverage of all new API features
- Step-by-step guided experience

### New Documentation Files

- `docs/unified-api-guide.md` - Deep dive into the new API structure
- `docs/v0.3.0-release-notes.md` - These release notes
- `examples/unified_api_demo.exs` - Practical usage examples

## 🔧 Technical Improvements

### Code Quality

- Zero compiler warnings - Maintains the clean codebase from v0.2.0
- 1,140 tests passing - Comprehensive test coverage
- 76 doctests - Extensive documentation examples
- Clean module structure - Logical organization with `defdelegate`

### Performance

- Maintained all performance optimizations from previous versions
- Added streaming operations for large datasets
- Improved memory usage for bulk operations

### Developer Experience

- Discoverability - Functions are now easy to find in logical modules
- Consistency - Similar operations follow consistent patterns
- IDE Support - Better autocomplete and documentation in editors

## 🚀 New Features

### Enhanced SNMP Operations

- Streaming operations - `walk_stream/3`, `table_stream/3`
- Performance benchmarking - `benchmark_device/3`
- Circuit breaker pattern - `with_circuit_breaker/3`
- Engine management - Advanced SNMP engine features

### Advanced MIB Features

- Tree navigation - `children/1`, `parent/1`, `walk_tree/2`
- Enhanced resolution - `resolve_enhanced/2`
- Dual compilation paths - High-level and low-level MIB compilation
- Standard MIB loading - `load_standard_mibs/0`

### Simulation Enhancements

- Simplified device creation - Easier device simulation setup
- Population management - Better handling of device groups
- Profile integration - Seamless integration with existing profiles

## 📊 Migration Guide

### From v0.2.x

No breaking changes! Your existing code will continue to work exactly as before.

Optional migrations for better discoverability:

    # Old way (still works)
    {:ok, value} = SnmpKit.get("host", "oid")

    # New way (recommended)
    {:ok, value} = SnmpKit.SNMP.get("host", "oid")

### From Other Libraries

    # From :snmp (Erlang)
    :snmp.sync_get(manager, oid, timeout)
    # Becomes:
    SnmpKit.SNMP.get("host", "oid", timeout: timeout)

    # From other Elixir SNMP libraries
    OtherLib.snmp_get(host, oid)
    # Becomes:
    SnmpKit.SNMP.get(host, oid)

## 🎉 What's Next

### v0.4.0 Roadmap

- Enhanced metrics and monitoring
- More simulation scenarios
- Performance optimization tools
- Extended MIB analysis capabilities

### Community

- Join the discussion on GitHub
- Contribute examples and use cases
- Share feedback on the unified API

## 📈 Statistics

- Total Functions: 50+ organized functions across 3 main modules
- Lines of Code: Maintained clean, focused codebase
- Test Coverage: 1,140 tests, 76 doctests, 0 failures
- Documentation: Complete rewrite with 3 new guides

## 🙏 Acknowledgments

This release represents a significant step forward in making SnmpKit the most user-friendly and powerful SNMP library for Elixir. Thank you to all users who provided feedback on the API design and helped shape this unified architecture.

Upgrade today: `{:snmpkit, "~> 0.3.0"}`

For questions or support, please visit the GitHub repository.

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