/**
 * 控制器辅助函数。
 *
 * author: linzhuo
 * since: 2016/11/22
 */
"use strict";
let configFile = require('../../include/commons').CONFIG_FILE;
let config = require('../../resources/config/' + configFile);
let redis = require('redis');
var log = require("../../util/log.js");

let redisClient = null;

class RedisClient {
    constructor() {
        this._connection = redis.createClient(
            config.redisConfig
        );

        this._connection.on('ready', function (res) {
            log.info('Redis is ready.');
        });

        this._connection.on('connect', function (res) {
            log.info('Redis connected.');
        });
    }

    get connection() {
        return this._connection;
    }

    static redisClient() {
        if (redisClient == null) {
            redisClient = new RedisClient();
        }

        return redisClient;
    }

    //--------------------Redis快捷操作简易封装--------------------------//

    /**
     * 字符串。
     *
     * @param key
     * @param value
     * @param handler
     */
    setString(key, value, handler) {
        this._connection.set(key, value, function (err, res) {
            handler(err, res);
        })
    }

    getString(key, handler) {
        this._connection.get(key, function (err, res) {
            handler(err, res);
        })
    }
}

module.exports = RedisClient;