classy-pay-core/lib/DataSourceManager.js

Shared tools used in ClassyPay-related projects

"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DataSourceManager = void 0;
require('source-map-support').install();
const Lock_1 = __importDefault(require("./utils/Lock"));
class DataSourceManager {
    constructor(dataSource, config) {
        this.lock = new Lock_1.default();
        this.initialized = false;
        this.querying = false;
        this.cache = { values: {}, missing: {} };
        if (!dataSource) {
            throw new Error('Cannot construct DataSourceManager with null data source');
        }
        if (!config) {
            throw new Error('Cannot construct DataSource with null config');
        }
        this.dataSource = dataSource;
        this.config = config;
    }
    getQuerying() {
        return this.querying;
    }
    async get(key) {
        return await this.lock.lockForPath(async () => {
            this.querying = true;
            try {
                await this._init();
                if (!(key in this.cache.values || key in this.cache.missing)) {
                    const value = await this.dataSource.get(key);
                    if (value) {
                        this.cache.values[key] = value;
                    }
                    else {
                        this.cache.missing[key] = true;
                    }
                }
                return this.cache.values[key];
            }
            finally {
                this.querying = false;
            }
        });
    }
    async _init() {
        if (!this.initialized) {
            await this.dataSource.initialize(this.config);
            this.initialized = true;
        }
    }
}
exports.DataSourceManager = DataSourceManager;
exports.default = DataSourceManager;
//# sourceMappingURL=DataSourceManager.js.map