node-hashtable/client.js

This is a simple hashtable, all written in node, to help you access and store your data over multiple workers or modules. It will provide the abstraction to access it through workers (cluster).

var nssocket = require("nssocket");

var hashTable = require("./hashtable.js");

var client;

var master = 0;

var callback = [];


module.exports = function _client(_port, _host) {
 
    client = new nssocket.NsSocket();
    
    client.connect(_port, _host);
    
    client.data("ex", function (json) {
       
       //json = JSON.parse(json);
       
       if(callback[json._id]) {
            callback[json._id](json.data);
            callback[json._id] = null;
       }

    });
    
};

module.exports.master = function(bool) {
    master = bool;
};


/* Send func */
var retry = 0;
function send_ex(event, data) {
    
    if(client) {
        return client.send(event, data);
    }

    /* Client still offline retry */
    setTimeout(function() {
        if(retry++ == 10) throw new Error('Hashtable could not connect to exchange server.');
        
        send_ex(event, data);
    }, 100);
    
}

/* Dynamic */

var exchange = [];

function create_fnc(verb) {
    
    return function() {
        
        var args = [];
        var fnc = null;
        
        for (var i = 0; i < arguments.length; i++) {
            
            if(i == arguments.length - 1 && typeof arguments[ i ] === "function") {
                fnc = arguments[i];
            }
            else {
                args.push(arguments[i]);
            }
            
        }

        if(master) {
            
            var data = hashTable[verb].apply(undefined, args) || null;
            
            if(fnc) return fnc(data);
            
            return data;
            
        }
        
        var _id = Math.random() + new Date().getTime();
        
        var json = {};

        json[verb] = { _id: _id, args: args };

        callback[_id] = fnc;

        send_ex("ex", json);
        
    };
    
}

for(var i in hashTable) {
    
    exchange[i] = create_fnc(i);

}

module.exports.exchange = exchange;