@voicenter-team/mysql-dynamic-cluster/dist/src/pool/LoadFactor.js

Galera cluster with implementation of dynamic choose mysql server for queries, caching, hashing it and metrics

"use strict";
/**
 * Created by Bohdan on Sep, 2021
 */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.LoadFactor = void 0;
const Logger_1 = __importDefault(require("../utils/Logger"));
/**
 * Load factor for pools to easily sort them
 */
class LoadFactor {
    /**
     * @param loadFactors parameters by which values pools should sort
     */
    constructor(loadFactors) {
        this._loadFactors = loadFactors;
    }
    /**
     * Update load factors from result of db global status if db has some changes
     * @param result result of db global status
     */
    check(result) {
        let score = 0;
        this._loadFactors.forEach(loadFactor => {
            const value = result.find(res => res.Variable_name === loadFactor.key).Value;
            if (isNaN(+value) || !value) {
                Logger_1.default.error("Value from db isn't number. Check if you set right key. Current key: " + loadFactor.key);
            }
            else {
                score += +value * loadFactor.multiplier;
            }
        });
        return score;
    }
}
exports.LoadFactor = LoadFactor;
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