redis-smq-common/dist/cjs/src/event-bus/event-bus-redis-factory.js

RedisSMQ Common Library provides many components that are mainly used by RedisSMQ and RedisSMQ Monitor.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventBusRedisFactory = void 0;
const index_js_1 = require("../errors/index.js");
const index_js_2 = require("../event/index.js");
const index_js_3 = require("./errors/index.js");
const event_bus_redis_js_1 = require("./event-bus-redis.js");
class EventBusRedisFactory extends index_js_2.EventEmitter {
    constructor(config) {
        super();
        this.instance = null;
        this.locked = false;
        this.init = (cb) => {
            this.getSetInstance((err) => cb(err));
        };
        this.shutdown = (cb) => {
            if (this.instance) {
                this.instance.removeAllListeners();
                this.instance.shutdown(() => {
                    this.instance = null;
                    cb();
                });
            }
            else
                cb();
        };
        this.config = config;
    }
    getInstance() {
        if (!this.instance)
            return new index_js_1.PanicError(`Use first getSetInstance() to initialize the EventBusRedisInstance class`);
        return this.instance;
    }
    getSetInstance(cb) {
        if (!this.locked) {
            if (!this.instance) {
                this.locked = true;
                event_bus_redis_js_1.EventBusRedis.createInstance(this.config, (err, inst) => {
                    this.locked = false;
                    if (err)
                        cb(err);
                    else if (!inst)
                        cb(new index_js_1.CallbackEmptyReplyError());
                    else {
                        this.instance = inst;
                        this.instance.on('error', (err) => this.emit('error', err));
                        cb(null, this.instance);
                    }
                });
            }
            else
                cb(null, this.instance);
        }
        else
            cb(new index_js_3.EventBusInstanceLockError());
    }
}
exports.EventBusRedisFactory = EventBusRedisFactory;
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