MCP Vibe Coding Knowledge Graph

import { logger } from '../utils/logger.js'; import { EventEmitter } from 'events'; import CypherQueryBuilder from './cypherQueryBuilder.js'; import QueryOptimizer from './queryOptimizer.js'; import QueryTemplateManager from './queryTemplates.js'; import QueryValidator from './queryValidator.js'; import BatchOperationManager from './batchOperations.js'; import PerformanceMonitor from './performanceMonitor.js'; import TransactionManager from './transactionManager.js'; /** * CONTEXT: Integrated Cypher query system for comprehensive Kuzu database management * REASON: Unified interface combining all query system components with intelligent orchestration * CHANGE: Complete query system with optimization, validation, monitoring, and batch processing * PREVENTION: System complexity, performance issues, data integrity problems, and operational overhead */ export class CypherQuerySystem extends EventEmitter { constructor(client, config = {}) { super(); this.client = client; this.config = { enableOptimization: config.enableOptimization !== false, enableValidation: config.enableValidation !== false, enableMonitoring: config.enableMonitoring !== false, enableBatchOperations: config.enableBatchOperations !== false, enableTransactions: config.enableTransactions !== false, enableTemplates: config.enableTemplates !== false, autoOptimize: config.autoOptimize !== false, strictValidation: config.strictValidation !== false, cacheQueries: config.cacheQueries !== false, maxConcurrentQueries: config.maxConcurrentQueries || 10, defaultTimeout: config.defaultTimeout || 30000, ...config }; // Initialize all subsystems this.initializeSubsystems(); // System state this.isInitialized = false; this.startTime = Date.now(); this.queryCount = 0; this.systemHealth = { status: 'INITIALIZING', lastCheck: Date.now(), issues: [] }; logger.info('CypherQuerySystem initializing', { enableOptimization: this.config.enableOptimization, enableValidation: this.config.enableValidation, enableMonitoring: this.config.enableMonitoring }); } /** * Initialize all subsystems */ initializeSubsystems() { try { // Initialize query optimizer if (this.config.enableOptimization) { this.optimizer = new QueryOptimizer({ cacheSize: this.config.optimizerCacheSize || 1000, optimizationLevel: this.config.optimizationLevel || 'balanced', enableStatistics: this.config.enableMonitoring }); this.optimizer.on('queryOptimized', (event) => { this.emit('queryOptimized', event); }); } // Initialize query validator if (this.config.enableValidation) { this.validator = new QueryValidator({ strictMode: this.config.strictValidation, maxQueryLength: this.config.maxQueryLength || 100000, enableLogging: this.config.enableMonitoring }); } // Initialize performance monitor if (this.config.enableMonitoring) { this.monitor = new PerformanceMonitor(this.client, { enableRealTimeMonitoring: true, samplingInterval: this.config.monitoringSampleInterval || 5000, slowQueryThreshold: this.config.slowQueryThreshold || 5000 }); this.monitor.on('alertTriggered', (alert) => { this.handlePerformanceAlert(alert); }); this.monitor.on('slowQueryDetected', (query) => { this.handleSlowQuery(query); }); } // Initialize transaction manager if (this.config.enableTransactions) { this.transactionManager = new TransactionManager(this.client, { defaultTimeout: this.config.defaultTimeout, enableDeadlockDetection: true, enableRecovery: true }); this.transactionManager.on('transactionError', (event) => { this.handleTransactionError(event); }); } // Initialize batch operations if (this.config.enableBatchOperations) { this.batchManager = new BatchOperationManager(this.client, { batchSize: this.config.batchSize || 1000, maxConcurrency: this.config.maxConcurrentQueries }); this.batchManager.on('batchCompleted', (event) => { this.emit('batchCompleted', event); }); } // Initialize template manager if (this.config.enableTemplates) { this.templateManager = new QueryTemplateManager( this.client, this.optimizer ); } logger.debug('All subsystems initialized successfully'); } catch (error) { logger.error('Failed to initialize subsystems:', error.message); throw new Error(`CypherQuerySystem initialization failed: ${error.message}`); } } /** * Initialize the complete system */ async initialize() { try { logger.info('Starting CypherQuerySystem initialization'); // Verify client connection if (!this.client) { throw new Error('Database client is required'); } // Test basic connectivity await this.testConnectivity(); // Initialize monitoring if enabled if (this.monitor) { await this.startMonitoring(); } // Setup system health checks this.setupHealthChecks(); // Setup event listeners this.setupEventListeners(); this.isInitialized = true; this.systemHealth.status = 'HEALTHY'; logger.info('CypherQuerySystem initialized successfully', { initializationTime: Date.now() - this.startTime, subsystems: this.getEnabledSubsystems() }); this.emit('systemInitialized'); } catch (error) { this.systemHealth.status = 'FAILED'; this.systemHealth.issues.push({ type: 'INITIALIZATION_ERROR', message: error.message, timestamp: Date.now() }); logger.error('CypherQuerySystem initialization failed:', error.message); this.emit('systemError', error); throw error; } } /** * Create a new query builder */ createQueryBuilder() { if (!this.isInitialized) { throw new Error('CypherQuerySystem not initialized'); } const builder = new CypherQueryBuilder(this); logger.debug('Query builder created'); return builder; } /** * Execute a query with full system integration */ async query(cypherQuery, parameters = {}, options = {}) { if (!this.isInitialized) { throw new Error('CypherQuerySystem not initialized'); } const queryId = this.generateQueryId(); const startTime = Date.now(); try { this.queryCount++; // Prepare execution context const executionContext = { queryId, query: cypherQuery, parameters, options: { enableOptimization: options.enableOptimization !== false && this.config.enableOptimization, enableValidation: options.enableValidation !== false && this.config.enableValidation, enableCaching: options.enableCaching !== false && this.config.cacheQueries, timeout: options.timeout || this.config.defaultTimeout, ...options }, startTime }; logger.debug('Executing query', { queryId, query: cypherQuery.substring(0, 100), paramCount: Object.keys(parameters).length }); // Step 1: Query validation let validationResult = null; if (executionContext.options.enableValidation && this.validator) { validationResult = await this.validator.validateQuery( cypherQuery, parameters, executionContext.options ); if (!validationResult.isValid) { throw new Error(`Query validation failed: ${validationResult.errors.join(', ')}`); } // Use sanitized query if available if (validationResult.sanitized) { executionContext.query = validationResult.query; executionContext.parameters = validationResult.parameters; } } // Step 2: Query optimization let optimizationResult = null; if (executionContext.options.enableOptimization && this.optimizer) { optimizationResult = await this.optimizer.optimizeQuery( executionContext.query, executionContext.parameters, { queryId, originalQuery: cypherQuery } ); // Use optimized query if improvement is significant if (optimizationResult.estimatedImprovement > 10) { executionContext.query = optimizationResult.optimizedQuery; executionContext.optimized = true; } } // Step 3: Check cache let cachedResult = null; if (executionContext.options.enableCaching && this.optimizer) { const querySignature = this.generateQuerySignature( executionContext.query, executionContext.parameters ); cachedResult = this.optimizer.getCachedResult(querySignature); if (cachedResult) { const executionTime = Date.now() - startTime; logger.debug('Query served from cache', { queryId, executionTime: `${executionTime}ms` }); // Record metrics if (this.monitor) { this.monitor.recordQueryMetric({ query: cypherQuery, parameters, executionTime, resultCount: cachedResult.length, cacheHit: true, optimized: !!optimizationResult }); } return this.formatQueryResult({ queryId, result: cachedResult, executionTime, cached: true, optimized: !!optimizationResult, validated: !!validationResult }); } } // Step 4: Execute query const result = await this.executeQueryDirect(executionContext); // Step 5: Cache result if applicable if (executionContext.options.enableCaching && this.optimizer && result.length > 0) { const querySignature = this.generateQuerySignature( executionContext.query, executionContext.parameters ); this.optimizer.cacheResult(querySignature, result); } const executionTime = Date.now() - startTime; // Step 6: Record metrics if (this.monitor) { this.monitor.recordQueryMetric({ query: cypherQuery, parameters, executionTime, resultCount: result.length, cacheHit: false, optimized: !!optimizationResult }); } logger.debug('Query executed successfully', { queryId, executionTime: `${executionTime}ms`, resultCount: result.length, optimized: !!optimizationResult, validated: !!validationResult }); return this.formatQueryResult({ queryId, result, executionTime, cached: false, optimized: !!optimizationResult, validated: !!validationResult, validationWarnings: validationResult?.warnings || [], optimizationImprovement: optimizationResult?.estimatedImprovement || 0 }); } catch (error) { const executionTime = Date.now() - startTime; // Record error metrics if (this.monitor) { this.monitor.recordQueryError({ query: cypherQuery, parameters, error }); } logger.error('Query execution failed', { queryId, error: error.message, executionTime: `${executionTime}ms`, query: cypherQuery.substring(0, 200) }); this.emit('queryError', { queryId, query: cypherQuery, parameters, error, executionTime }); throw new CypherQueryError(`Query execution failed: ${error.message}`, { queryId, originalError: error, executionTime }); } } /** * Execute query directly through client */ async executeQueryDirect(executionContext) { return await this.client.query( executionContext.query, executionContext.parameters, { timeout: executionContext.options.timeout } ); } /** * Execute template */ async executeTemplate(templateName, parameters = {}, options = {}) { if (!this.templateManager) { throw new Error('Template manager not enabled'); } const startTime = Date.now(); try { const result = await this.templateManager.executeTemplate( templateName, parameters, options ); logger.debug('Template executed successfully', { templateName, executionTime: result.executionTime, resultCount: result.result.length }); return result; } catch (error) { logger.error('Template execution failed', { templateName, error: error.message }); throw error; } } /** * Execute batch operations */ async executeBatch(operations, options = {}) { if (!this.batchManager) { throw new Error('Batch operations not enabled'); } return await this.batchManager.executeBatch(operations, options); } /** * Create streaming query */ createQueryStream(query, parameters = {}, options = {}) { if (!this.batchManager) { throw new Error('Batch operations not enabled'); } return this.batchManager.createQueryStream(query, parameters, options); } /** * Begin transaction */ async beginTransaction(options = {}) { if (!this.transactionManager) { throw new Error('Transaction manager not enabled'); } return await this.transactionManager.beginTransaction(options); } /** * Execute transaction */ async executeTransaction(operations, options = {}) { if (!this.transactionManager) { throw new Error('Transaction manager not enabled'); } return await this.transactionManager.executeTransaction(operations, options); } /** * Get system status and health */ getSystemStatus() { const status = { isInitialized: this.isInitialized, health: { ...this.systemHealth }, uptime: Date.now() - this.startTime, queryCount: this.queryCount, subsystems: {}, performance: {} }; // Subsystem status if (this.optimizer) { status.subsystems.optimizer = this.optimizer.getStatistics(); } if (this.validator) { status.subsystems.validator = this.validator.getStatistics(); } if (this.monitor) { status.subsystems.monitor = this.monitor.getRealTimeStatistics(); status.performance = this.monitor.getPerformanceReport('1h'); } if (this.transactionManager) { status.subsystems.transactions = this.transactionManager.getMetrics(); } if (this.batchManager) { status.subsystems.batchOperations = this.batchManager.getBatchStatistics(); } if (this.templateManager) { status.subsystems.templates = this.templateManager.getTemplateStatistics(); } return status; } /** * Get performance report */ getPerformanceReport(timeRange = '1h') { if (!this.monitor) { throw new Error('Performance monitoring not enabled'); } return this.monitor.getPerformanceReport(timeRange); } /** * Test system connectivity */ async testConnectivity() { try { // Simple test query await this.client.query('RETURN 1 as test'); logger.debug('Connectivity test passed'); return true; } catch (error) { logger.error('Connectivity test failed:', error.message); throw new Error(`Database connectivity test failed: ${error.message}`); } } /** * Start monitoring */ async startMonitoring() { if (!this.monitor) { return; } // Start performance monitoring // The monitor starts automatically when created logger.debug('Monitoring started'); } /** * Setup health checks */ setupHealthChecks() { // Periodic health check this.healthCheckInterval = setInterval(async () => { await this.performHealthCheck(); }, 60000); // Every minute logger.debug('Health checks configured'); } /** * Perform system health check */ async performHealthCheck() { try { this.systemHealth.lastCheck = Date.now(); this.systemHealth.issues = []; // Test database connectivity await this.testConnectivity(); // Check subsystem health if (this.monitor) { const stats = this.monitor.getRealTimeStatistics(); if (stats.errorRate > 10) { this.systemHealth.issues.push({ type: 'HIGH_ERROR_RATE', message: `Error rate: ${stats.errorRate.toFixed(2)}%`, severity: 'HIGH' }); } if (stats.averageQueryTime > 10000) { this.systemHealth.issues.push({ type: 'SLOW_QUERIES', message: `Average query time: ${stats.averageQueryTime.toFixed(2)}ms`, severity: 'MEDIUM' }); } } // Check transaction manager if (this.transactionManager) { const txMetrics = this.transactionManager.getMetrics(); if (txMetrics.activeTransactions > 50) { this.systemHealth.issues.push({ type: 'HIGH_TRANSACTION_COUNT', message: `Active transactions: ${txMetrics.activeTransactions}`, severity: 'MEDIUM' }); } } // Update health status if (this.systemHealth.issues.length === 0) { this.systemHealth.status = 'HEALTHY'; } else { const highSeverityIssues = this.systemHealth.issues.filter(i => i.severity === 'HIGH'); this.systemHealth.status = highSeverityIssues.length > 0 ? 'UNHEALTHY' : 'WARNING'; } this.emit('healthCheck', this.systemHealth); } catch (error) { this.systemHealth.status = 'UNHEALTHY'; this.systemHealth.issues.push({ type: 'HEALTH_CHECK_FAILED', message: error.message, severity: 'HIGH' }); logger.error('Health check failed:', error.message); } } /** * Setup event listeners */ setupEventListeners() { // Listen to client events if available if (this.client && this.client.on) { this.client.on('error', (error) => { this.handleClientError(error); }); this.client.on('disconnected', () => { this.handleClientDisconnection(); }); } } /** * Handle performance alerts */ handlePerformanceAlert(alert) { logger.warn('Performance alert received', { alertType: alert.type, severity: alert.severity, message: alert.message }); // Auto-optimization if enabled if (this.config.autoOptimize && alert.type === 'slow_query') { this.triggerAutoOptimization(alert); } this.emit('performanceAlert', alert); } /** * Handle slow queries */ handleSlowQuery(queryMetric) { logger.warn('Slow query detected', { query: queryMetric.query.substring(0, 100), executionTime: queryMetric.executionTime }); this.emit('slowQuery', queryMetric); } /** * Handle transaction errors */ handleTransactionError(event) { logger.error('Transaction error', { transactionId: event.transactionId, operation: event.operation, error: event.error.message }); this.emit('transactionError', event); } /** * Handle client errors */ handleClientError(error) { logger.error('Database client error:', error.message); this.systemHealth.status = 'UNHEALTHY'; this.systemHealth.issues.push({ type: 'CLIENT_ERROR', message: error.message, timestamp: Date.now() }); this.emit('clientError', error); } /** * Handle client disconnection */ handleClientDisconnection() { logger.error('Database client disconnected'); this.systemHealth.status = 'UNHEALTHY'; this.systemHealth.issues.push({ type: 'CLIENT_DISCONNECTED', message: 'Database client lost connection', timestamp: Date.now() }); this.emit('clientDisconnected'); } /** * Trigger auto-optimization */ async triggerAutoOptimization(alert) { try { logger.info('Triggering auto-optimization', { alertType: alert.type, data: alert.data }); // Implement auto-optimization logic based on alert type // This is a placeholder for more sophisticated optimization this.emit('autoOptimizationTriggered', alert); } catch (error) { logger.error('Auto-optimization failed:', error.message); } } /** * Format query result */ formatQueryResult(resultData) { return { queryId: resultData.queryId, data: resultData.result, metadata: { executionTime: resultData.executionTime, resultCount: resultData.result.length, cached: resultData.cached || false, optimized: resultData.optimized || false, validated: resultData.validated || false, validationWarnings: resultData.validationWarnings || [], optimizationImprovement: resultData.optimizationImprovement || 0, timestamp: Date.now() } }; } /** * Generate query signature for caching */ generateQuerySignature(query, parameters) { const normalizedQuery = query.replace(/\s+/g, ' ').trim().toLowerCase(); const paramString = JSON.stringify(parameters, Object.keys(parameters).sort()); return `${normalizedQuery}:${paramString}`; } /** * Generate unique query ID */ generateQueryId() { return `query_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`; } /** * Get enabled subsystems */ getEnabledSubsystems() { const subsystems = []; if (this.optimizer) subsystems.push('optimizer'); if (this.validator) subsystems.push('validator'); if (this.monitor) subsystems.push('monitor'); if (this.transactionManager) subsystems.push('transactions'); if (this.batchManager) subsystems.push('batchOperations'); if (this.templateManager) subsystems.push('templates'); return subsystems; } /** * Shutdown the system gracefully */ async shutdown() { logger.info('Shutting down CypherQuerySystem'); try { // Stop health checks if (this.healthCheckInterval) { clearInterval(this.healthCheckInterval); } // Shutdown subsystems if (this.monitor) { this.monitor.stop(); } if (this.transactionManager) { await this.transactionManager.shutdown(); } this.systemHealth.status = 'SHUTDOWN'; this.emit('systemShutdown'); logger.info('CypherQuerySystem shutdown completed'); } catch (error) { logger.error('Error during shutdown:', error.message); throw error; } } } /** * Custom error class for query system */ class CypherQueryError extends Error { constructor(message, details = {}) { super(message); this.name = 'CypherQueryError'; this.details = details; this.timestamp = Date.now(); } } // Static factory method CypherQuerySystem.create = async function(client, config = {}) { const system = new CypherQuerySystem(client, config); await system.initialize(); return system; }; export { CypherQuerySystem, CypherQueryError }; export default CypherQuerySystem;