redis-smq-common/dist/cjs/src/redis-client/redis-client-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.RedisClientFactory = void 0;
const index_js_1 = require("../errors/index.js");
const index_js_2 = require("../event/index.js");
const create_redis_client_js_1 = require("./create-redis-client.js");
const index_js_3 = require("./errors/index.js");
class RedisClientFactory extends index_js_2.EventEmitter {
    constructor(config) {
        super();
        this.instance = null;
        this.locked = false;
        this.init = (cb) => {
            this.getSetInstance((err) => cb(err));
        };
        this.getSetInstance = (cb) => {
            if (!this.locked) {
                if (!this.instance) {
                    this.locked = true;
                    this.createClient(this.config, (err, client) => {
                        this.locked = false;
                        if (err)
                            return cb(err);
                        if (!client)
                            return cb(new index_js_1.CallbackEmptyReplyError());
                        this.instance = client;
                        this.instance.on('error', (err) => this.emit('error', err));
                        cb(null, this.instance);
                    });
                }
                else
                    cb(null, this.instance);
            }
            else
                cb(new index_js_3.InstanceLockError());
        };
        this.shutdown = (cb) => {
            if (this.instance) {
                this.instance.halt(() => {
                    this.instance = null;
                    cb();
                });
            }
            else
                cb();
        };
        this.config = config;
    }
    createClient(config, cb) {
        (0, create_redis_client_js_1.createRedisClient)(config, (err, client) => {
            if (err)
                return cb(err);
            if (!client)
                return cb(new index_js_1.CallbackEmptyReplyError());
            this.setupClient(client, cb);
        });
    }
    setupClient(client, cb) {
        cb(null, client);
    }
    getInstance() {
        if (!this.instance)
            return new index_js_1.PanicError(`Use first getSetInstance() to initialize the RedisClientInstance class`);
        return this.instance;
    }
}
exports.RedisClientFactory = RedisClientFactory;
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