85 lines
2.0 KiB
JavaScript
Executable File
85 lines
2.0 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 Cluster = require('./cluster');
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/**
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* Create a new Cluster.
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* Cluster handle pools with patterns and handle failover / distributed load
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* according to selectors (round-robin / random / ordered )
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*
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* @param args cluster arguments. see pool-cluster-options.
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* @constructor
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*/
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class ClusterCallback {
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#cluster;
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constructor(args) {
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this.#cluster = new Cluster(args);
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this.#cluster._setCallback();
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this.on = this.#cluster.on.bind(this.#cluster);
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this.once = this.#cluster.once.bind(this.#cluster);
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}
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/**
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* End cluster (and underlying pools).
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*
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* @param callback - not mandatory
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*/
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end(callback) {
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if (callback && typeof callback !== 'function') {
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throw new Error('callback parameter must be a function');
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}
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const endingFct = callback ? callback : () => {};
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this.#cluster
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.end()
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.then(() => {
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endingFct();
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})
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.catch(endingFct);
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}
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/**
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* Get connection from available pools matching pattern, according to selector
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*
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* @param pattern pattern filter (not mandatory)
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* @param selector node selector ('RR','RANDOM' or 'ORDER')
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* @param callback callback function
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*/
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getConnection(pattern, selector, callback) {
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let pat = pattern,
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sel = selector,
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cal = callback;
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if (typeof pattern === 'function') {
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pat = null;
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sel = null;
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cal = pattern;
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} else if (typeof selector === 'function') {
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sel = null;
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cal = selector;
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}
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const endingFct = cal ? cal : (err, conn) => {};
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this.#cluster.getConnection(pat, sel, endingFct);
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}
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add(id, config) {
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this.#cluster.add(id, config);
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}
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of(pattern, selector) {
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return this.#cluster.of(pattern, selector);
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}
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remove(pattern) {
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this.#cluster.remove(pattern);
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}
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get __tests() {
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return this.#cluster.__tests;
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}
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}
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module.exports = ClusterCallback;
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