init source

node_modules/sequelize/lib/dialects/mariadb/connection-manager.js

@@ -0,0 +1,145 @@
+'use strict';
+
+const AbstractConnectionManager = require('../abstract/connection-manager');
+const SequelizeErrors = require('../../errors');
+const Promise = require('../../promise');
+const { logger } = require('../../utils/logger');
+const DataTypes = require('../../data-types').mariadb;
+const momentTz = require('moment-timezone');
+const debug = logger.debugContext('connection:mariadb');
+const parserStore = require('../parserStore')('mariadb');
+
+/**
+ * MariaDB Connection Manager
+ *
+ * Get connections, validate and disconnect them.
+ * AbstractConnectionManager pooling use it to handle MariaDB specific connections
+ * Use https://github.com/MariaDB/mariadb-connector-nodejs to connect with MariaDB server
+ *
+ * @extends AbstractConnectionManager
+ * @returns Class<ConnectionManager>
+ * @private
+ */
+
+class ConnectionManager extends AbstractConnectionManager {
+  constructor(dialect, sequelize) {
+    sequelize.config.port = sequelize.config.port || 3306;
+    super(dialect, sequelize);
+    this.lib = this._loadDialectModule('mariadb');
+    this.refreshTypeParser(DataTypes);
+  }
+
+  static _typecast(field, next) {
+    if (parserStore.get(field.type)) {
+      return parserStore.get(field.type)(field, this.sequelize.options, next);
+    }
+    return next();
+  }
+
+  _refreshTypeParser(dataType) {
+    parserStore.refresh(dataType);
+  }
+
+  _clearTypeParser() {
+    parserStore.clear();
+  }
+
+  /**
+   * Connect with MariaDB database based on config, Handle any errors in connection
+   * Set the pool handlers on connection.error
+   * Also set proper timezone once connection is connected.
+   *
+   * @param {Object} config
+   * @returns {Promise<Connection>}
+   * @private
+   */
+  connect(config) {
+    // Named timezone is not supported in mariadb, convert to offset
+    let tzOffset = this.sequelize.options.timezone;
+    tzOffset = /\//.test(tzOffset) ? momentTz.tz(tzOffset).format('Z')
+      : tzOffset;
+
+    const connectionConfig = {
+      host: config.host,
+      port: config.port,
+      user: config.username,
+      password: config.password,
+      database: config.database,
+      timezone: tzOffset,
+      typeCast: ConnectionManager._typecast.bind(this),
+      bigNumberStrings: false,
+      supportBigNumbers: true,
+      foundRows: false
+    };
+
+    if (config.dialectOptions) {
+      Object.assign(connectionConfig, config.dialectOptions);
+    }
+
+    if (!this.sequelize.config.keepDefaultTimezone) {
+      // set timezone for this connection
+      if (connectionConfig.initSql) {
+        if (!Array.isArray(
+          connectionConfig.initSql)) {
+          connectionConfig.initSql = [connectionConfig.initSql];
+        }
+        connectionConfig.initSql.push(`SET time_zone = '${tzOffset}'`);
+      } else {
+        connectionConfig.initSql = `SET time_zone = '${tzOffset}'`;
+      }
+    }
+
+    return this.lib.createConnection(connectionConfig)
+      .then(connection => {
+        this.sequelize.options.databaseVersion = connection.serverVersion();
+        debug('connection acquired');
+        connection.on('error', error => {
+          switch (error.code) {
+            case 'ESOCKET':
+            case 'ECONNRESET':
+            case 'EPIPE':
+            case 'PROTOCOL_CONNECTION_LOST':
+              this.pool.destroy(connection);
+          }
+        });
+        return connection;
+      })
+      .catch(err => {
+        switch (err.code) {
+          case 'ECONNREFUSED':
+            throw new SequelizeErrors.ConnectionRefusedError(err);
+          case 'ER_ACCESS_DENIED_ERROR':
+          case 'ER_ACCESS_DENIED_NO_PASSWORD_ERROR':
+            throw new SequelizeErrors.AccessDeniedError(err);
+          case 'ENOTFOUND':
+            throw new SequelizeErrors.HostNotFoundError(err);
+          case 'EHOSTUNREACH':
+          case 'ENETUNREACH':
+          case 'EADDRNOTAVAIL':
+            throw new SequelizeErrors.HostNotReachableError(err);
+          case 'EINVAL':
+            throw new SequelizeErrors.InvalidConnectionError(err);
+          default:
+            throw new SequelizeErrors.ConnectionError(err);
+        }
+      });
+  }
+
+  disconnect(connection) {
+    // Don't disconnect connections with CLOSED state
+    if (!connection.isValid()) {
+      debug('connection tried to disconnect but was already at CLOSED state');
+      return Promise.resolve();
+    }
+    //wrap native Promise into bluebird
+    return Promise.resolve(connection.end());
+  }
+
+  validate(connection) {
+    return connection && connection.isValid();
+  }
+}
+
+module.exports = ConnectionManager;
+module.exports.ConnectionManager = ConnectionManager;
+module.exports.default = ConnectionManager;