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

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

import { CallbackEmptyReplyError, PanicError } from '../errors/index.js';
import { EventEmitter } from '../event/index.js';
import { EventBusInstanceLockError } from './errors/index.js';
import { EventBusRedis } from './event-bus-redis.js';
export class EventBusRedisFactory extends EventEmitter {
    instance = null;
    locked = false;
    config;
    constructor(config) {
        super();
        this.config = config;
    }
    init = (cb) => {
        this.getSetInstance((err) => cb(err));
    };
    getInstance() {
        if (!this.instance)
            return new PanicError(`Use first getSetInstance() to initialize the EventBusRedisInstance class`);
        return this.instance;
    }
    getSetInstance(cb) {
        if (!this.locked) {
            if (!this.instance) {
                this.locked = true;
                EventBusRedis.createInstance(this.config, (err, inst) => {
                    this.locked = false;
                    if (err)
                        cb(err);
                    else if (!inst)
                        cb(new 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 EventBusInstanceLockError());
    }
    shutdown = (cb) => {
        if (this.instance) {
            this.instance.removeAllListeners();
            this.instance.shutdown(() => {
                this.instance = null;
                cb();
            });
        }
        else
            cb();
    };
}
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