dnsd-name/redis.js

Dynamic authoritative name server for Iris services

var redis = require('redis');
var util = require('util');
var EventEmitter = require('events').EventEmitter

var Redis = function (driver) {
    EventEmitter.apply(this, arguments);

    // The principal redis client
    var clientReady = false;
    var client = redis.createClient(driver.port || 6379, driver.host || '127.0.0.1');

    if (driver.auth) {
        client.auth(driver.auth);
    }
    var prefix = '';
    if (driver.prefix) {
        prefix = driver.prefix;
    }

    if (driver.db) {
        client.select(driver.db);
    }

    client.on('error', function (err) {
        console.log(err)
    }.bind(this));

    client.on('ready', function (err) {

        console.log('ready')
    }.bind(this));

    Object.defineProperty(this, 'connected', {
        get: function () {
            return client.connected && (!clientWrite || clientWrite.connected);
        }
    });

    this.read = function (hosts, type, callback) {
        var multi = client.multi();
        var first = hosts[0];
        hosts.forEach(function (host) {
            //console.log(prefix + type + ':' + host)
            multi.lrange(prefix + type + ':' + host, 0, -1);
        });

        multi.exec(function (err, data) {
            //console.log(err, data)
            callback(err, data);
        });
    };
    this.create = function (host, vhost, callback) {
        client.rpush(prefix + 'frontend:' + host, vhost, callback);
    };

    this.add = this.create;

};
util.inherits(Redis, EventEmitter);

module.exports = Redis;