osr/lib/core/dao/redismq.js

osr

var redis = require("redis");
var Schema = require("../schema");

var RedisMQ = function(options){
    this.options = options;
    this.port = options.port || 6379;
    this.host = options.host || "localhost";
    this.conn = redis.createClient(this.port,this.host);
    this.lisconn = redis.createClient(this.port,this.host);
    if(options.index){
        this.conn.select(options.index);
        this.lisconn.select(options.index);
    }
    
    this.schemas = {};
    this.models = {};
    this.collections = {};
}

RedisMQ.prototype.define = function(name, model ,rename){
    this.schemas[name] = new Schema(model.schema);
    this.models[name] = model;
    this.collections[name] = {publish:this.conn,subscribe:this.lisconn};
    this.rename = rename||name;
    return this.models[name];
}

RedisMQ.prototype.listen = function(cb){
    var db = this.collections[this.name].subscribe;
    if(db){
        db.subscribe(this.name,function(err,channel){
            if(err){
                cb(err);
                return;
            }else{
                db.on("message",function(channel,message){
                    // console.log(channel,message);
                    cb(JSON.parse(message),channel);
                });
            }
        })
    }else{
        if(typeof(arguments[arguments.length-1]) == "function"){
            arguments[arguments.length-1](new Error("RedisMQ:The "+this.name+" COLLECTION NOT FOUND"));
        }
    }
}

RedisMQ.prototype.publish = function(msg,cb){
    var db = this.collections[this.name].publish;
    if(db){
        cb(null,msg);
        if(typeof msg === "object"){
            msg = JSON.stringify(msg);
        }
        // console.log("publish",this.name,msg);
        db.publish(this.name,msg);
    }else{
        if(typeof(arguments[arguments.length-1]) == "function"){
            arguments[arguments.length-1](new Error("RedisMQ:The "+this.name+" COLLECTION NOT FOUND"));
        }
    }
}

RedisMQ.prototype.connect = function(fn){
    this.isconnected = true;
    // var db = this.collections[this.name];
    // this.dao.listen.apply(this,this.listener);
}

module.exports = exports = RedisMQ;