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Mini Shell
Mini Shell
/**
* Module dependencies.
*/
var debug = require('debug')('axon:req');
var queue = require('../plugins/queue');
var slice = require('../utils').slice;
var Message = require('amp-message');
var Socket = require('./sock');
/**
* Expose `ReqSocket`.
*/
module.exports = ReqSocket;
/**
* Initialize a new `ReqSocket`.
*
* @api private
*/
function ReqSocket() {
Socket.call(this);
this.n = 0;
this.ids = 0;
this.callbacks = {};
this.identity = this.get('identity');
this.use(queue());
}
/**
* Inherits from `Socket.prototype`.
*/
ReqSocket.prototype.__proto__ = Socket.prototype;
/**
* Return a message id.
*
* @return {String}
* @api private
*/
ReqSocket.prototype.id = function(){
return this.identity + ':' + this.ids++;
};
/**
* Emits the "message" event with all message parts
* after the null delimeter part.
*
* @param {net.Socket} sock
* @return {Function} closure(msg, multipart)
* @api private
*/
ReqSocket.prototype.onmessage = function(){
var self = this;
return function(buf){
var msg = new Message(buf);
var id = msg.pop();
var fn = self.callbacks[id];
if (!fn) return debug('missing callback %s', id);
fn.apply(null, msg.args);
delete self.callbacks[id];
};
};
/**
* Sends `msg` to the remote peers. Appends
* the null message part prior to sending.
*
* @param {Mixed} msg
* @api public
*/
ReqSocket.prototype.send = function(msg){
var socks = this.socks;
var len = socks.length;
var sock = socks[this.n++ % len];
var args = slice(arguments);
if (sock) {
var hasCallback = 'function' == typeof args[args.length - 1];
if (!hasCallback) args.push(function(){});
var fn = args.pop();
fn.id = this.id();
this.callbacks[fn.id] = fn;
args.push(fn.id);
}
if (sock) {
sock.write(this.pack(args));
} else {
debug('no connected peers');
this.enqueue(args);
}
};
Zerion Mini Shell 1.0