File: /var/www/javago_test/node_modules/sequelize/lib/dialects/abstract/connection-manager.js.map
{
"version": 3,
"sources": ["../../../src/dialects/abstract/connection-manager.js"],
"sourcesContent": ["'use strict';\n\nconst { Pool, TimeoutError } = require('sequelize-pool');\nconst _ = require('lodash');\nconst semver = require('semver');\nconst errors = require('../../errors');\nconst { logger } = require('../../utils/logger');\nconst deprecations = require('../../utils/deprecations');\nconst debug = logger.debugContext('pool');\n\n/**\n * Abstract Connection Manager\n *\n * Connection manager which handles pooling & replication.\n * Uses sequelize-pool for pooling\n *\n * @private\n */\nclass ConnectionManager {\n constructor(dialect, sequelize) {\n const config = _.cloneDeep(sequelize.config);\n\n this.sequelize = sequelize;\n this.config = config;\n this.dialect = dialect;\n this.versionPromise = null;\n this.dialectName = this.sequelize.options.dialect;\n\n if (config.pool === false) {\n throw new Error('Support for pool:false was removed in v4.0');\n }\n\n config.pool = _.defaults(config.pool || {}, {\n max: 5,\n min: 0,\n idle: 10000,\n acquire: 60000,\n evict: 1000,\n validate: this._validate.bind(this)\n });\n\n this.initPools();\n }\n\n refreshTypeParser(dataTypes) {\n _.each(dataTypes, dataType => {\n if (Object.prototype.hasOwnProperty.call(dataType, 'parse')) {\n if (dataType.types[this.dialectName]) {\n this._refreshTypeParser(dataType);\n } else {\n throw new Error(`Parse function not supported for type ${dataType.key} in dialect ${this.dialectName}`);\n }\n }\n });\n }\n\n /**\n * Try to load dialect module from various configured options.\n * Priority goes like dialectModulePath > dialectModule > require(default)\n *\n * @param {string} moduleName Name of dialect module to lookup\n *\n * @private\n * @returns {object}\n */\n _loadDialectModule(moduleName) {\n try {\n if (this.sequelize.config.dialectModulePath) {\n return require(this.sequelize.config.dialectModulePath);\n }\n if (this.sequelize.config.dialectModule) {\n return this.sequelize.config.dialectModule;\n }\n return require(moduleName);\n\n } catch (err) {\n if (err.code === 'MODULE_NOT_FOUND') {\n if (this.sequelize.config.dialectModulePath) {\n throw new Error(`Unable to find dialect at ${this.sequelize.config.dialectModulePath}`);\n }\n throw new Error(`Please install ${moduleName} package manually`);\n }\n\n throw err;\n }\n }\n\n /**\n * Handler which executes on process exit or connection manager shutdown\n *\n * @private\n * @returns {Promise}\n */\n async _onProcessExit() {\n if (!this.pool) {\n return;\n }\n\n await this.pool.drain();\n debug('connection drain due to process exit');\n\n return await this.pool.destroyAllNow();\n }\n\n /**\n * Drain the pool and close it permanently\n *\n * @returns {Promise}\n */\n async close() {\n // Mark close of pool\n this.getConnection = async function getConnection() {\n throw new Error('ConnectionManager.getConnection was called after the connection manager was closed!');\n };\n\n return await this._onProcessExit();\n }\n\n /**\n * Initialize connection pool. By default pool autostart is set to false, so no connection will be\n * be created unless `pool.acquire` is called.\n */\n initPools() {\n const config = this.config;\n\n if (!config.replication) {\n this.pool = new Pool({\n name: 'sequelize',\n create: () => this._connect(config),\n destroy: async connection => {\n const result = await this._disconnect(connection);\n debug('connection destroy');\n return result;\n },\n validate: config.pool.validate,\n max: config.pool.max,\n min: config.pool.min,\n acquireTimeoutMillis: config.pool.acquire,\n idleTimeoutMillis: config.pool.idle,\n reapIntervalMillis: config.pool.evict,\n maxUses: config.pool.maxUses\n });\n\n debug(`pool created with max/min: ${config.pool.max}/${config.pool.min}, no replication`);\n\n return;\n }\n\n if (!Array.isArray(config.replication.read)) {\n config.replication.read = [config.replication.read];\n }\n\n // Map main connection config\n config.replication.write = _.defaults(config.replication.write, _.omit(config, 'replication'));\n\n // Apply defaults to each read config\n config.replication.read = config.replication.read.map(readConfig =>\n _.defaults(readConfig, _.omit(this.config, 'replication'))\n );\n\n // custom pooling for replication (original author @janmeier)\n let reads = 0;\n this.pool = {\n release: client => {\n if (client.queryType === 'read') {\n this.pool.read.release(client);\n } else {\n this.pool.write.release(client);\n }\n },\n acquire: (queryType, useMaster) => {\n useMaster = useMaster === undefined ? false : useMaster;\n if (queryType === 'SELECT' && !useMaster) {\n return this.pool.read.acquire();\n }\n return this.pool.write.acquire();\n },\n destroy: connection => {\n this.pool[connection.queryType].destroy(connection);\n debug('connection destroy');\n },\n destroyAllNow: async () => {\n await Promise.all([\n this.pool.read.destroyAllNow(),\n this.pool.write.destroyAllNow()\n ]);\n\n debug('all connections destroyed');\n },\n drain: async () => Promise.all([\n this.pool.write.drain(),\n this.pool.read.drain()\n ]),\n read: new Pool({\n name: 'sequelize:read',\n create: async () => {\n // round robin config\n const nextRead = reads++ % config.replication.read.length;\n const connection = await this._connect(config.replication.read[nextRead]);\n connection.queryType = 'read';\n return connection;\n },\n destroy: connection => this._disconnect(connection),\n validate: config.pool.validate,\n max: config.pool.max,\n min: config.pool.min,\n acquireTimeoutMillis: config.pool.acquire,\n idleTimeoutMillis: config.pool.idle,\n reapIntervalMillis: config.pool.evict,\n maxUses: config.pool.maxUses\n }),\n write: new Pool({\n name: 'sequelize:write',\n create: async () => {\n const connection = await this._connect(config.replication.write);\n connection.queryType = 'write';\n return connection;\n },\n destroy: connection => this._disconnect(connection),\n validate: config.pool.validate,\n max: config.pool.max,\n min: config.pool.min,\n acquireTimeoutMillis: config.pool.acquire,\n idleTimeoutMillis: config.pool.idle,\n reapIntervalMillis: config.pool.evict,\n maxUses: config.pool.maxUses\n })\n };\n\n debug(`pool created with max/min: ${config.pool.max}/${config.pool.min}, with replication`);\n }\n\n /**\n * Get connection from pool. It sets database version if it's not already set.\n * Call pool.acquire to get a connection\n *\n * @param {object} [options] Pool options\n * @param {string} [options.type] Set which replica to use. Available options are `read` and `write`\n * @param {boolean} [options.useMaster=false] Force master or write replica to get connection from\n *\n * @returns {Promise<Connection>}\n */\n async getConnection(options) {\n options = options || {};\n\n if (this.sequelize.options.databaseVersion === 0) {\n if (!this.versionPromise) {\n this.versionPromise = (async () => {\n try {\n const connection = await this._connect(this.config.replication.write || this.config);\n const _options = {};\n\n _options.transaction = { connection }; // Cheat .query to use our private connection\n _options.logging = () => {};\n _options.logging.__testLoggingFn = true;\n\n //connection might have set databaseVersion value at initialization,\n //avoiding a useless round trip\n if (this.sequelize.options.databaseVersion === 0) {\n const version = await this.sequelize.databaseVersion(_options);\n const parsedVersion = _.get(semver.coerce(version), 'version') || version;\n this.sequelize.options.databaseVersion = semver.valid(parsedVersion)\n ? parsedVersion\n : this.dialect.defaultVersion;\n }\n\n if (semver.lt(this.sequelize.options.databaseVersion, this.dialect.defaultVersion)) {\n deprecations.unsupportedEngine();\n debug(`Unsupported database engine version ${this.sequelize.options.databaseVersion}`);\n }\n\n this.versionPromise = null;\n return await this._disconnect(connection);\n } catch (err) {\n this.versionPromise = null;\n throw err;\n }\n })();\n }\n await this.versionPromise;\n }\n\n let result;\n\n try {\n\n await this.sequelize.runHooks('beforePoolAcquire', options);\n\n result = await this.pool.acquire(options.type, options.useMaster);\n\n await this.sequelize.runHooks('afterPoolAcquire', result, options);\n\n } catch (error) {\n if (error instanceof TimeoutError) throw new errors.ConnectionAcquireTimeoutError(error);\n throw error;\n }\n\n debug('connection acquired');\n\n return result;\n }\n\n /**\n * Release a pooled connection so it can be utilized by other connection requests\n *\n * @param {Connection} connection\n */\n releaseConnection(connection) {\n this.pool.release(connection);\n debug('connection released');\n }\n\n /**\n * Destroys a pooled connection and removes it from the pool.\n *\n * @param {Connection} connection\n */\n async destroyConnection(connection) {\n await this.pool.destroy(connection);\n debug(`connection ${connection.uuid} destroyed`);\n }\n\n /**\n * Call dialect library to get connection\n *\n * @param {*} config Connection config\n * @private\n * @returns {Promise<Connection>}\n */\n async _connect(config) {\n await this.sequelize.runHooks('beforeConnect', config);\n const connection = await this.dialect.connectionManager.connect(config);\n await this.sequelize.runHooks('afterConnect', connection, config);\n return connection;\n }\n\n /**\n * Call dialect library to disconnect a connection\n *\n * @param {Connection} connection\n * @private\n * @returns {Promise}\n */\n async _disconnect(connection) {\n await this.sequelize.runHooks('beforeDisconnect', connection);\n await this.dialect.connectionManager.disconnect(connection);\n return this.sequelize.runHooks('afterDisconnect', connection);\n }\n\n /**\n * Determine if a connection is still valid or not\n *\n * @param {Connection} connection\n *\n * @returns {boolean}\n */\n _validate(connection) {\n if (!this.dialect.connectionManager.validate) {\n return true;\n }\n\n return this.dialect.connectionManager.validate(connection);\n }\n}\n\nmodule.exports = ConnectionManager;\nmodule.exports.ConnectionManager = ConnectionManager;\nmodule.exports.default = ConnectionManager;\n"],
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