claude-flow-novice
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Claude Flow Novice - Advanced orchestration platform for multi-agent AI workflows with CFN Loop architecture Includes Local RuVector Accelerator and all CFN skills for complete functionality.
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JavaScript
/**
* Unified Query API
*
* Single interface for querying PostgreSQL, SQLite, and Redis with automatic
* backend selection, query translation, and connection pooling.
*
* Part of Phase 2, Task P2-3.1: Unified Query API
*
* Features:
* - Automatic backend selection based on data type
* - Query translation (SQL ↔ Redis commands)
* - Connection pooling for all backends
* - Transaction support across backends
* - StandardError error handling
* - Performance optimization (<500ms queries, <100ms connection, <50ms translation)
*
* @example
* ```typescript
* const api = new UnifiedQueryAPI({
* redis: { type: 'redis', host: 'localhost', port: 6379 },
* sqlite: { type: 'sqlite', database: './data.db' },
* postgres: { type: 'postgres', connectionString: 'postgresql://...' }
* });
*
* await api.connect();
*
* // Automatic backend selection
* const result = await api.query({
* dataType: 'cache',
* operation: 'get',
* key: 'user:123'
* });
* ```
*/ import { DatabaseService } from './database-service.js';
import { QueryTranslator } from './query-translator.js';
import { StandardError, ErrorCode } from './errors.js';
import { Pool } from 'pg';
import { Database as SQLiteDatabase } from 'sqlite3';
import { createClient } from 'redis';
/**
* Backend types
*/ export var BackendType = /*#__PURE__*/ function(BackendType) {
BackendType["REDIS"] = "redis";
BackendType["SQLITE"] = "sqlite";
BackendType["POSTGRES"] = "postgres";
return BackendType;
}({});
/**
* Query types
*/ export var QueryType = /*#__PURE__*/ function(QueryType) {
QueryType["SELECT"] = "query";
QueryType["INSERT"] = "insert";
QueryType["UPDATE"] = "update";
QueryType["DELETE"] = "delete";
QueryType["GET"] = "get";
QueryType["SET"] = "set";
QueryType["RAW"] = "raw";
return QueryType;
}({});
/**
* Connection pool manager
*/ let ConnectionPoolManager = class ConnectionPoolManager {
pools = new Map();
config = new Map();
constructor(){}
initialize(backend, config) {
this.config.set(backend, config);
switch(backend){
case "postgres":
const pgPool = new Pool({
connectionString: config.connectionString,
max: config.poolSize || 5,
idleTimeoutMillis: config.idleTimeout || 30000,
connectionTimeoutMillis: config.timeout || 5000
});
this.pools.set(backend, pgPool);
break;
case "sqlite":
// SQLite connection pool (simple implementation)
const sqlitePool = [];
for(let i = 0; i < (config.poolSize || 5); i++){
sqlitePool.push(new SQLiteDatabase(config.database));
}
this.pools.set(backend, {
connections: sqlitePool,
available: [
...sqlitePool
]
});
break;
case "redis":
// Redis connection pool
const redisClients = [];
for(let i = 0; i < (config.poolSize || 5); i++){
const client = createClient({
socket: {
host: config.host,
port: config.port
}
});
redisClients.push(client);
}
this.pools.set(backend, {
connections: redisClients,
available: [
...redisClients
]
});
break;
}
}
async acquire(backend) {
const startTime = Date.now();
const pool = this.pools.get(backend);
if (!pool) {
throw new StandardError(ErrorCode.DB_CONNECTION_FAILED, `Connection pool not initialized for ${backend}`, {
backend
});
}
let connection;
switch(backend){
case "postgres":
connection = await pool.connect();
break;
case "sqlite":
case "redis":
// Wait for available connection
while(pool.available.length === 0){
if (Date.now() - startTime > 5000) {
throw new StandardError(ErrorCode.DB_TIMEOUT, `Connection acquisition timeout for ${backend}`, {
backend,
waitTime: Date.now() - startTime
});
}
await new Promise((resolve)=>setTimeout(resolve, 10));
}
connection = pool.available.shift();
break;
}
const acquisitionTime = Date.now() - startTime;
if (acquisitionTime > 100) {
console.warn(`Connection acquisition took ${acquisitionTime}ms (target: <100ms)`);
}
return connection;
}
async release(backend, connection) {
const pool = this.pools.get(backend);
if (!pool) {
return;
}
switch(backend){
case "postgres":
connection.release();
break;
case "sqlite":
case "redis":
pool.available.push(connection);
break;
}
}
getStats(backend) {
const pool = this.pools.get(backend);
const config = this.config.get(backend);
if (!pool) {
return {
total: 0,
available: 0,
waiting: 0
};
}
switch(backend){
case "postgres":
return {
total: pool.totalCount,
available: pool.idleCount,
waiting: pool.waitingCount
};
case "sqlite":
case "redis":
return {
total: pool.connections.length,
available: pool.available.length,
waiting: 0
};
default:
return {
total: 0,
available: 0,
waiting: 0
};
}
}
async close(backend) {
const pool = this.pools.get(backend);
if (!pool) {
return;
}
switch(backend){
case "postgres":
await pool.end();
break;
case "sqlite":
for (const conn of pool.connections){
conn.close();
}
break;
case "redis":
for (const conn of pool.connections){
await conn.quit();
}
break;
}
this.pools.delete(backend);
}
async closeAll() {
const promises = Array.from(this.pools.keys()).map((backend)=>this.close(backend));
await Promise.all(promises);
}
};
/**
* Unified Query API
*
* Provides single interface for all database operations with automatic
* backend selection, query translation, and performance optimization.
*/ export class UnifiedQueryAPI {
dbService;
translator;
poolManager;
config;
constructor(config){
this.config = config;
this.dbService = new DatabaseService(config);
this.translator = new QueryTranslator();
this.poolManager = new ConnectionPoolManager();
// Initialize connection pools
if (config.redis) {
this.poolManager.initialize("redis", config.redis);
}
if (config.sqlite) {
this.poolManager.initialize("sqlite", config.sqlite);
}
if (config.postgres) {
this.poolManager.initialize("postgres", config.postgres);
}
}
/**
* Connect to all configured databases
*/ async connect() {
try {
await this.dbService.connect();
} catch (error) {
throw new StandardError(ErrorCode.DB_CONNECTION_FAILED, 'Failed to connect to databases', {
config: this.config
}, error instanceof Error ? error : undefined);
}
}
/**
* Disconnect from all databases
*/ async disconnect() {
await this.dbService.disconnect();
await this.poolManager.closeAll();
}
/**
* Automatically select backend based on data type and query complexity
*/ selectBackend(request) {
// Force specific backend if requested
if (request.forceBackend) {
return request.forceBackend;
}
// Data type-based selection
if (request.dataType) {
switch(request.dataType){
case 'cache':
case 'session':
case 'metrics':
return "redis";
case 'embedded':
return "sqlite";
case 'relational':
return "postgres";
}
}
// Query complexity-based selection
if (request.joins && request.joins.length > 0) {
return "postgres"; // Complex joins prefer PostgreSQL
}
if (request.key) {
return "redis"; // Key-based access prefers Redis
}
// Default to PostgreSQL for structured queries
return "postgres";
}
/**
* Execute query with automatic backend selection and translation
*/ async query(request) {
const startTime = Date.now();
const backend = this.selectBackend(request);
try {
const adapter = this.dbService.getAdapter(backend);
let result;
let translated = false;
// Execute query based on operation
switch(request.operation){
case 'query':
case 'select':
if (request.table) {
result = await adapter.query(request.table, request.filters || []);
} else if (request.query) {
result = await adapter.raw(request.query, request.params);
}
break;
case 'get':
if (request.key) {
result = await adapter.get(request.key);
}
break;
case 'set':
if (backend === "redis" && request.key) {
result = await adapter.raw(`SET ${request.key} ${JSON.stringify(request.value)}`);
}
break;
case 'hset':
if (backend === "redis" && request.key) {
const fields = Object.entries(request.value).map(([k, v])=>`${k} ${JSON.stringify(v)}`).join(' ');
result = await adapter.raw(`HSET ${request.key} ${fields}`);
}
break;
case 'hgetall':
if (backend === "redis" && request.key) {
result = await adapter.raw(`HGETALL ${request.key}`);
}
break;
case 'lpush':
if (backend === "redis" && request.key) {
const values = Array.isArray(request.value) ? request.value : [
request.value
];
result = await adapter.raw(`LPUSH ${request.key} ${values.map((v)=>JSON.stringify(v)).join(' ')}`);
}
break;
case 'lrange':
if (backend === "redis" && request.key) {
result = await adapter.raw(`LRANGE ${request.key} ${request.start || 0} ${request.stop || -1}`);
}
break;
case 'insert':
if (request.table && request.data) {
const opResult = await adapter.insert(request.table, request.data);
result = opResult.data;
}
break;
case 'update':
if (request.table && request.key && request.data) {
const opResult = await adapter.update(request.table, request.key, request.data);
result = opResult.data;
}
break;
case 'delete':
if (request.table && request.key) {
await adapter.delete(request.table, request.key);
result = null;
}
break;
case 'raw':
if (request.query) {
result = await adapter.raw(request.query, request.params);
}
break;
default:
throw new StandardError(ErrorCode.DB_QUERY_FAILED, `Unsupported operation: ${request.operation}`, {
operation: request.operation
});
}
const executionTime = Date.now() - startTime;
if (executionTime > 500) {
console.warn(`Query execution took ${executionTime}ms (target: <500ms)`);
}
return {
success: true,
data: result,
backend,
executionTime,
translated,
rowsAffected: Array.isArray(result) ? result.length : result ? 1 : 0
};
} catch (error) {
const executionTime = Date.now() - startTime;
throw new StandardError(ErrorCode.DB_QUERY_FAILED, `Query execution failed on ${backend}`, {
backend,
request,
executionTime,
query: request.query
}, error instanceof Error ? error : undefined);
}
}
/**
* Execute cross-backend transaction
*/ async transaction(operations) {
const startTime = Date.now();
const results = [];
const completedBackends = [];
try {
// Execute operations sequentially (transaction semantics)
for (const op of operations){
const result = await op.operation(this);
if (!result.success) {
throw new Error(`Transaction operation failed: ${result.error?.message}`);
}
results.push(result);
completedBackends.push(op.backend);
}
const executionTime = Date.now() - startTime;
return {
success: true,
operations: results,
backend: "postgres",
executionTime
};
} catch (error) {
// Rollback completed operations
console.error('Transaction failed, attempting rollback...');
// Note: Actual rollback implementation would require transaction context
// This is a simplified version
const executionTime = Date.now() - startTime;
throw new StandardError(ErrorCode.DB_TRANSACTION_FAILED, 'Transaction failed and rolled back', {
completedOperations: results.length,
totalOperations: operations.length,
executionTime
}, error instanceof Error ? error : undefined);
}
}
/**
* Acquire connection from pool
*/ async acquireConnection(backend) {
return this.poolManager.acquire(backend);
}
/**
* Release connection back to pool
*/ async releaseConnection(backend, connection) {
return this.poolManager.release(backend, connection);
}
/**
* Get pool statistics
*/ async getPoolStats(backend) {
return this.poolManager.getStats(backend);
}
/**
* Clear test data (for testing only)
*/ async clearTestData() {
// Implementation would clear test tables/keys
// This is a placeholder for testing
}
/**
* Get database service (for advanced operations)
*/ getDatabaseService() {
return this.dbService;
}
/**
* Get query translator (for advanced operations)
*/ getQueryTranslator() {
return this.translator;
}
}
// Export types and enums
export { TranslationResult } from './query-translator.js';
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