node-ipc/node-ipc.js

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var os = require('os'),
util = require('util'),
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colors = require('colors'),
pubsub = require('event-pubsub'),
eventParser = require('./lib/eventParser.js'),
Client = require('./lib/client.js'),
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Server = require('./lib/socketServer.js');
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colors.setTheme(
{
good : 'green',
notice : 'yellow',
warn : 'red',
error : 'redBG',
debug : 'magenta',
variable: 'cyan',
data : 'blue'
}
);
var defaults={
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appspace : 'app.',
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socketRoot : '/tmp/',
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networkHost : 'localhost',
networkPort : 8000,
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id : os.hostname(),
encoding : 'utf8',
silent : false,
maxConnections : 100,
retry : 500,
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maxRetries : false,
stopRetrying : false
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}
var ipc = {
config : defaults,
connectTo : connect,
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connectToNet: connectNet,
disconnect : disconnect,
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serve : serve,
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serveNet : serveNet,
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of : {},
server : false,
log : log
}
function log(){
if(ipc.config.silent)
return;
var args=Array.prototype.slice.call(arguments);
for(var i=0, count=args.length; i<count; i++){
if(typeof args[i] != 'object')
continue;
args[i]=util.inspect(args[i],{colors:true});
}
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console.log(
args.join(' ')
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);
}
function disconnect(id){
if(!ipc.of[id])
return;
ipc.of[id].config.stopRetrying=true;
ipc.of[id].off('*');
if(ipc.of[id].socket){
if(ipc.of[id].socket.destroy)
ipc.of[id].socket.destroy();
}
delete ipc.of[id];
}
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function serve(path,callback){
if(typeof path=='function'){
callback=path;
path=false;
}
if(!path){
ipc.log(
'Server path not specified, so defaulting to'.notice,
'ipc.config.socketRoot + ipc.config.appspace + ipc.config.id'.variable,
(ipc.config.socketRoot+ipc.config.appspace+ipc.config.id).data
);
path=ipc.config.socketRoot+ipc.config.appspace+ipc.config.id;
}
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if(!callback)
callback=function(){};
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ipc.server=new Server(
path,
ipc.config,
log
);
ipc.server.on(
'start',
callback
);
}
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function serveNet(host,port,UDPType,callback){
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if(typeof host=='number'){
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callback=UDPType;
UDPType=port;
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port=host;
host=false;
}
if(typeof host=='function'){
callback=host;
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UDPType=false;
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host=false;
port=false;
}
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if(!host){
ipc.log(
'Server host not specified, so defaulting to'.notice,
'ipc.config.networkHost'.variable,
ipc.config.networkHost.data
);
host=ipc.config.networkHost;
}
if(host.toLowerCase()=='udp4' || host.toLowerCase()=='udp6'){
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callback=port;
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UDPType=host.toLowerCase();
port=false;
host=ipc.config.networkHost;
}
if(typeof port=='string'){
callback=UDPType;
UDPType=port;
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port=false;
}
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if(typeof port=='function'){
callback=port;
UDPType=false;
port=false;
}
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if(!port){
ipc.log(
'Server port not specified, so defaulting to'.notice,
'ipc.config.networkPort'.variable,
ipc.config.networkPort
);
port=ipc.config.networkPort;
}
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if(typeof UDPType=='function'){
callback=UDPType;
UDPType=false;
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}
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if(!callback)
callback=function(){};
ipc.server=new Server(
host,
ipc.config,
log,
port
);
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if(UDPType)
ipc.server[UDPType]=true;
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ipc.server.on(
'start',
callback
);
}
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function connect(id,path,callback){
if(typeof path == 'function'){
callback=path;
path=false;
}
if(!callback)
callback=function(){};
if(!id){
ipc.log(
'Service id required'.warn,
'Requested service connection without specifying service id. Aborting connection attempt'.notice
);
return;
}
if(!path){
ipc.log(
'Service path not specified, so defaulting to'.notice,
'ipc.config.socketRoot + ipc.config.appspace + id'.variable,
(ipc.config.socketRoot+ipc.config.appspace+id).data
);
path=ipc.config.socketRoot+ipc.config.appspace+id;
}
if(ipc.of[id]){
if(!ipc.of[id].socket.destroyed){
ipc.log(
'Already Connected to'.notice,
id.variable,
'- So executing success without connection'.notice
);
callback();
return;
}
ipc.of[id].destroy();
}
ipc.of[id] = new Client(ipc.config,ipc.log);
ipc.of[id].id = id;
ipc.of[id].path = path;
ipc.of[id].connect();
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callback(ipc);
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}
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function connectNet(id,host,port,callback){
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if(!id){
ipc.log(
'Service id required'.warn,
'Requested service connection without specifying service id. Aborting connection attempt'.notice
);
return;
}
if(typeof host=='number'){
callback=port;
port=host;
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host=false;
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}
if(typeof host=='function'){
callback=host;
host=false;
port=false;
}
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if(!host){
ipc.log(
'Server host not specified, so defaulting to'.notice,
'ipc.config.networkHost'.variable,
ipc.config.networkHost.data
);
host=ipc.config.networkHost;
}
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if(typeof port=='function'){
callback=port;
port=false;
}
if(!port){
ipc.log(
'Server port not specified, so defaulting to'.notice,
'ipc.config.networkPort'.variable,
ipc.config.networkPort
);
port=ipc.config.networkPort;
}
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if(typeof callback == 'string'){
UDPType=callback;
callback=false;
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}
if(!callback)
callback=function(){};
if(ipc.of[id]){
if(!ipc.of[id].socket.destroyed){
ipc.log(
'Already Connected to'.notice,
id.variable,
'- So executing success without connection'.notice
);
callback();
return;
}
ipc.of[id].destroy();
}
ipc.of[id] = new Client(ipc.config,ipc.log);
ipc.of[id].id = id;
ipc.of[id].path = host;
ipc.of[id].port = port;
ipc.of[id].connect();
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callback(ipc);
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}
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module.exports=ipc;