mysql-query-mcp-server
Version:
MySQL Query MCP server for AI assistants - execute read-only MySQL queries from Cursor IDE, Windsurf, or Claude Desktop
72 lines • 2.82 kB
JavaScript
import { createPool } from "mysql2/promise";
import { Environment } from "../types/index.js";
function debug(message, ...args) {
process.stderr.write(`DEBUG [Pools]: ${message} ${args.map(arg => JSON.stringify(arg)).join(' ')}\n`);
}
// Connection pools for each environment
export const pools = new Map();
debug('Initializing database pools...');
debug('Environment enum options:', Object.values(Environment.enum));
debug('Environment enum type:', typeof Environment);
debug('Environment enum:', Environment);
// Map of environment to env var prefix
const ENV_PREFIX_MAP = {
local: 'LOCAL',
development: 'DEVELOPMENT',
staging: 'STAGING',
production: 'PRODUCTION'
};
// Initialize pools
Object.values(Environment.enum).forEach((env) => {
const envPrefix = ENV_PREFIX_MAP[env];
debug(`=== Initializing pool for ${env} environment ===`);
debug(`Using prefix: ${envPrefix}`);
debug('Environment variables:');
debug(`HOST: ${process.env[`${envPrefix}_DB_HOST`]}`);
debug(`USER: ${process.env[`${envPrefix}_DB_USER`]}`);
debug(`DB: ${process.env[`${envPrefix}_DB_NAME`]}`);
debug(`PASS: ${process.env[`${envPrefix}_DB_PASS`] ? 'set' : 'not set'}`);
debug(`SSL: ${process.env.MCP_MYSQL_SSL}`);
const config = {
host: process.env[`${envPrefix}_DB_HOST`],
user: process.env[`${envPrefix}_DB_USER`],
password: process.env[`${envPrefix}_DB_PASS`],
database: process.env[`${envPrefix}_DB_NAME`],
ssl: process.env.MCP_MYSQL_SSL === "true" ? {} : undefined,
connectionLimit: 5,
enableKeepAlive: true,
keepAliveInitialDelay: 10000,
};
if (config.host && config.user && config.password && config.database) {
debug(`Creating pool for ${env} with config:`, {
host: config.host,
user: config.user,
database: config.database,
ssl: config.ssl,
hasPassword: !!config.password
});
try {
const pool = createPool(config);
pools.set(env, pool);
debug(`Pool created successfully for ${env}`);
debug(`Pool type for ${env}:`, typeof pool);
debug(`Pool methods for ${env}:`, Object.keys(pool));
}
catch (error) {
debug(`Error creating pool for ${env}:`, error);
}
}
else {
debug(`Missing configuration for ${env}:`, {
hasHost: !!config.host,
hasUser: !!config.user,
hasPass: !!config.password,
hasDB: !!config.database
});
}
});
debug('Final pools state:');
debug('Pools map keys:', Array.from(pools.keys()));
debug('Pools map size:', pools.size);
debug('Pools map entries:', Array.from(pools.entries()).map(([env]) => env));
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