233 lines
8.0 KiB
Markdown
233 lines
8.0 KiB
Markdown
# Phase 6 Implementation Guide
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This technical guide provides detailed implementation specifications for the Phase 6 Plugin System. It includes code snippets, architectural decisions, and implementation details for developers who will be implementing the code.
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## Directory Structure
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Create the following directory structure for the plugin system:
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```text
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libs/network/src/
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├── plugins/
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│ ├── types.ts # Core plugin interfaces and types
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│ ├── plugin-manager.ts # Main plugin system entry point
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│ ├── plugin-registry.ts # Plugin registration and tracking
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│ ├── plugin-loader.ts # Plugin loading and initialization
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│ ├── security-verifier.ts # Plugin security verification
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│ ├── resource-monitor.ts # Plugin resource usage monitoring
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│ ├── extension-point.ts # Extension point implementation
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│ ├── plugin-context.ts # Plugin context implementation
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│ ├── utils/ # Utility functions
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│ ├── core-plugins/ # First-party plugins
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│ └── development/ # Plugin development tools
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└── integration/
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└── phase6-integration.ts # Integration with Phase 5 components
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```
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## Core Interfaces and Types
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The `types.ts` file will define these key interfaces:
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1. **IPlugin Interface**: The core interface that all plugins must implement
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- Properties: id, version, displayName, description, author, homepage
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- Methods: onRegister, onUnregister, initialize, shutdown, configure, getCapabilities, getExtensions
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2. **PluginContext Interface**: The context provided to each plugin
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- Access to other plugins, event system, extension points, resource monitoring
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- Controlled environment for plugin execution
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3. **ExtensionPoint Interface**: Defines extension points where plugins can provide functionality
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- Methods for getting, adding, and removing extensions
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- Schema validation for extensions
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4. **Plugin Lifecycle States**: Enum defining the plugin states
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- REGISTERED, INITIALIZING, ACTIVE, INACTIVE, ERROR, UNREGISTERED
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## Plugin Manager
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The Plugin Manager is the main entry point for the plugin system and should implement:
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1. **Registration/Unregistration**: Methods for registering and unregistering plugins
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2. **Lifecycle Management**: Initialize and shutdown plugins in the correct order
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3. **Plugin Access**: Get plugin by ID or query by type
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4. **Extension Point Management**: Create and access extension points
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5. **Event System**: Plugin lifecycle events and cross-plugin communication
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Security considerations:
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- Validate plugins during registration
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- Control plugin capabilities and access
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- Isolate plugins from each other
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## Plugin Registry
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The Plugin Registry maintains information about registered plugins:
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1. **Plugin Storage**: Store plugin instances and metadata
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2. **Plugin State Tracking**: Track the current state of each plugin
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3. **Dependency Resolution**: Determine plugin load order based on dependencies
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4. **Version Compatibility**: Check version constraints between plugins
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Implementation details:
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- Use a Map to store plugins by ID
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- Implement topological sorting for dependency-based ordering
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- Track registration time and plugin state
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## Extension Point System
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The Extension Point system enables plugins to extend functionality at defined points:
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1. **Extension Point Registration**: Create new extension points with schemas
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2. **Extension Management**: Add, remove, and query extensions
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3. **Schema Validation**: Validate extensions against their schemas
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4. **Extension Ordering**: Support priority-based ordering of extensions
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Implementation details:
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- Use a registry of extension points
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- Implement schema validation for extensions
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- Provide filtering and ordering capabilities
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## Resource Monitoring
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The Resource Monitor tracks and controls plugin resource usage:
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1. **Resource Tracking**: Monitor CPU, memory, network, and storage usage
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2. **Resource Limiting**: Apply limits to plugin resource consumption
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3. **Usage Reporting**: Provide resource usage reports
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4. **Throttling**: Automatically throttle high-usage plugins
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Implementation details:
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- Use TimerController for periodic monitoring
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- Track resource usage history
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- Implement configurable thresholds and actions
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## First-Party Plugins
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Implement these core plugins:
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### 1. Network Condition Plugin
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Simulates various network conditions for testing:
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- Features: Latency, packet loss, bandwidth limitation, jitter, network partitions
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- Integration: Works with MemoryTransport for testing
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- Time Control: Uses TimerController for deterministic testing
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Implementation details:
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- Intercept transport send method
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- Apply simulated conditions
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- Provide predefined condition profiles
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### 2. Security Plugin
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Enhances network security:
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- Features: Authentication, encryption, access control, audit logging
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- Integration: Uses @suaveplan/crypto library
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- Security Models: Role-based and capability-based
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### 3. Logging Plugin
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Provides enhanced logging:
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- Features: Multiple log levels, filtering, internationalization
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- Output: Console, file, custom destinations
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- Formatting: Timestamp, source, structured data
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### 4. Resource Management Plugin
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Optimizes resource usage:
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- Features: Resource prioritization, adaptive allocation, usage analytics
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- Monitoring: Real-time resource tracking
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- Policies: Configurable resource allocation strategies
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### 5. Performance Monitoring Plugin
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Monitors network performance:
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- Features: Metric collection, performance reports, bottleneck detection
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- Analysis: Trend analysis, anomaly detection
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- Alerting: Configurable thresholds and notifications
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## Integration with Phase 5
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### Enhancing the Tier Manager
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Enhance the EnhancedTierManager to support plugins:
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1. **Extension Points**: Add extension points for tier strategies
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2. **Plugin Discovery**: Find and integrate relevant plugins
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3. **Strategy Selection**: Choose optimal strategies from plugins
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4. **Fallback Mechanisms**: Use built-in logic when no plugins are available
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Implementation details:
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- Extend EnhancedTierManager with plugin support
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- Integrate with ResourceBalancer and TierPartitionHandler
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- Create plugin-aware optimizers
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### Resource Balancer Integration
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Enhance the ResourceBalancer to work with the ResourceManagementPlugin:
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1. **Resource Metrics**: Use plugin-provided metrics
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2. **Optimization Strategies**: Apply plugin-suggested optimizations
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3. **Threshold Handling**: Respond to plugin-detected threshold crossings
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### Partition Handler Integration
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Integrate TierPartitionHandler with network simulation:
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1. **Partition Simulation**: Use NetworkConditionPlugin for testing
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2. **Recovery Testing**: Simulate partition healing
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3. **Resilience Verification**: Verify partition detection and handling
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## Testing Approach
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Use these strategies for testing:
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1. **Real Simulation Over Mocking**: Use MemoryTransport instead of mocks
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2. **Time Control**: Use TimerController instead of Jest timers
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3. **Isolation**: Create isolated test instances of PluginManager
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4. **Security**: Test plugin security boundaries
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5. **Resource Testing**: Verify resource monitoring and limits
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Test structure:
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- Unit tests for individual components
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- Integration tests for plugin interactions
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- Security tests for plugin isolation
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- Performance tests for overhead measurement
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## Implementation Steps
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1. **Core System First**:
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- Implement plugin interfaces and base types
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- Create plugin manager and registry
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- Build extension point system
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2. **Security and Resources**:
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- Implement security verification
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- Create resource monitoring
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- Add plugin isolation
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3. **First-Party Plugins**:
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- Implement network condition plugin first (for testing)
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- Create other core plugins
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- Test plugin interactions
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4. **Integration**:
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- Integrate with Phase 5 components
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- Enhance existing managers with plugin support
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- Create backward compatibility layer
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5. **Documentation and Examples**:
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- Create plugin development documentation
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- Implement example plugins
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- Create tutorials
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