135 lines
3.4 KiB
JavaScript
Executable File
135 lines
3.4 KiB
JavaScript
Executable File
// SPDX-License-Identifier: LGPL-2.1-or-later
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// Copyright (c) 2015-2024 MariaDB Corporation Ab
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'use strict';
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const EventEmitter = require('events');
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const Errors = require('../misc/errors');
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/**
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* Default command interface.
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*/
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class Command extends EventEmitter {
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constructor(cmdParam, resolve, reject) {
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super();
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this.cmdParam = cmdParam;
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this.sequenceNo = -1;
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this.compressSequenceNo = -1;
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this.resolve = resolve;
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this.reject = reject;
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this.sending = false;
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this.unexpectedError = this.throwUnexpectedError.bind(this);
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}
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displaySql() {
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return null;
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}
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/**
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* Throw an unexpected error.
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* server exchange will still be read to keep connection in a good state, but promise will be rejected.
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*
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* @param msg message
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* @param fatal is error fatal for connection
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* @param info current server state information
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* @param sqlState error sqlState
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* @param errno error number
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*/
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throwUnexpectedError(msg, fatal, info, sqlState, errno) {
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const err = Errors.createError(
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msg,
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errno,
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info,
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sqlState,
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this.opts && this.opts.logParam ? this.displaySql() : this.sql,
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fatal,
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this.cmdParam ? this.cmdParam.stack : null,
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false
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);
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if (this.reject) {
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process.nextTick(this.reject, err);
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this.resolve = null;
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this.reject = null;
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}
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return err;
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}
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/**
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* Create and throw new Error from error information
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* only first called throwing an error or successfully end will be executed.
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*
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* @param msg message
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* @param fatal is error fatal for connection
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* @param info current server state information
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* @param sqlState error sqlState
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* @param errno error number
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*/
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throwNewError(msg, fatal, info, sqlState, errno) {
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this.onPacketReceive = null;
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const err = this.throwUnexpectedError(msg, fatal, info, sqlState, errno);
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this.emit('end');
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return err;
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}
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/**
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* When command cannot be sent due to error.
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* (this is only on start command)
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*
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* @param msg error message
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* @param errno error number
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* @param info connection information
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*/
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sendCancelled(msg, errno, info) {
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const err = Errors.createError(msg, errno, info, 'HY000', this.opts.logParam ? this.displaySql() : this.sql);
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this.emit('send_end');
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this.throwError(err, info);
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}
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/**
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* Throw Error
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* only first called throwing an error or successfully end will be executed.
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*
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* @param err error to be thrown
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* @param info current server state information
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*/
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throwError(err, info) {
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this.onPacketReceive = null;
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if (this.reject) {
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if (this.cmdParam && this.cmdParam.stack) {
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err = Errors.createError(
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err.text ? err.text : err.message,
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err.errno,
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info,
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err.sqlState,
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err.sql,
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err.fatal,
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this.cmdParam.stack,
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false
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);
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}
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this.resolve = null;
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process.nextTick(this.reject, err);
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this.reject = null;
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}
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this.emit('end', err);
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}
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/**
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* Successfully end command.
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* only first called throwing an error or successfully end will be executed.
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*
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* @param val return value.
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*/
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successEnd(val) {
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this.onPacketReceive = null;
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if (this.resolve) {
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this.reject = null;
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process.nextTick(this.resolve, val);
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this.resolve = null;
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}
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this.emit('end');
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}
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}
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module.exports = Command;
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