I try to call an external function in SpookyJS by doing the same thing than in the wiki: https://github.com/WaterfallEngineering/SpookyJS/wiki/Introduction
But when I try the following code, I have this error:
ReferenceError: Can't find variable: test
try {
var Spooky = require('spooky');
} catch (e) {
var Spooky = require('../lib/spooky');
}
var urls = ["http://www.google.fr",
"http://www.yahoo.com"
];
exports.clicker = function(req, res)
{
console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");
var visitUrl = function(urlIndex, nbClicked)
{
console.log("HELLO");
};
var spooky = new Spooky(
{
child: {
// transport: 'http'
},
casper: {
logLevel: 'debug',
verbose: true
}
}, function (err)
{
if (err)
{
e = new Error('Failed to initialize SpookyJS');
e.details = err;
throw e;
}
spooky.start(urls[0]);
console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");
spooky.then([{
test: visitUrl
}, function(){
console.log("THIRD: " + test + " \n\n\n END THIRD");
}]);
spooky.run();
});
// Uncomment this block to see all of the things Casper has to say.
// There are a lot.
// He has opinions.
spooky.on('console', function (line) {
console.log(line);
});
spooky.on('hello', function (greeting) {
console.log(greeting);
});
spooky.on('log', function (log) {
if (log.space === 'remote') {
console.log(log.message.replace(/ \- .*/, ''));
}
});
}
These two following logs work:
console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");
console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");
But the third one is responsible for the error message:
console.log("THIRD: " + test + " \n\n\n END THIRD");
Any suggestion?
I would like to comment on your post instead of going with a big answer but I do not have the reputation for it, meh.
You can not pass functions in the ashing. If you were to do
var x = 'HELLO'
spooky.then([{
XinCasper : x
}, function(){
//do something with XinCasper
}])
That would work. If you want to pass an object or array, use JSON.stringify and rebuild in the casper scope.
If you want to access spooky functions from the casper scope, use event emitters instead, as following (See mostly the last lines):
try {
var Spooky = require('spooky');
} catch (e) {
var Spooky = require('../lib/spooky');
}
var urls = ["http://www.google.fr",
"http://www.yahoo.com"
];
exports.clicker = function(req, res)
{
console.log("FIRST: " + visitUrl + " \n\n\n END FIRST");
var visitUrl = function(urlIndex, nbClicked)
{
console.log("HELLO");
};
var spooky = new Spooky(
{
child: {
// transport: 'http'
},
casper: {
logLevel: 'debug',
verbose: true
}
}, function (err)
{
if (err)
{
e = new Error('Failed to initialize SpookyJS');
e.details = err;
throw e;
}
spooky.start(urls[0]);
console.log("SECOND: " + visitUrl + " \n\n\n END SECOND");
spooky.then(function(){
//casper scope
var y = 'something'
this.emit('third', y)
});
spooky.run();
});
spooky.on('third', function(y){
console.log('Hey, I can output ' + y + ' here.')
}
Finally I succeed to do what I needed by using PhantomJS-node instead of SpookyJS.
Clearly, you are using variable test
console.log("THIRD: " + test + " \n\n\n END THIRD");
without declaring it first.
var test;
Replace it with req maybe. :)
Related
My goal is to wrap MySQL queries, pass the parameters to a function and another function does the MySQL job, returning the results.
Here's my code so far:
//mysql lib
var mysql = require('mysql');
//database credentials
exports.pool = mysql.createPool({
connectionLimit: 50,
host: 'localhost',
user: 'root',
password: 'password',
database: '_app',
debug: false
});
//my wrapper =(
var returnResultset = exports.returnResultset = function (qry) {
return new Promise(function (resolve, reject) {
try {
mysql_.pool.getConnection(function (err, connection) {
if (err) {
console.log("Error on function returnResultset - MYSQL ERROR: " + err);
return reject(err);
}
connection.query(qry, [], function (error, results, fields) {
connection.release();
if (error) {
console.log("Error on function returnResultset - MYSQL ERROR: " + error);
return reject(error);
}
return resolve(results);
});
});
}
catch (e) {
console.log('error:' + e);
}
});
};
//wrapper function for testing purposes
var selectOneField = exports.selectOneField = function (tbl, field, pk, pkval) {
var qry_ = "SELECT " + field + " FROM " + tbl + " WHERE " + pk + " = '" + pkval + "'";
returnResultset(qry_).then(function (results) {
return results;
}, function (error) {
console.log("Error: " + error);
})
};
//...and on another page I want to be able to receive the results from the function above:
var isExpired = exports.isExpired = function (cod) {
var rtf = db_.selectOneField('view_expiredusers', 'cod', 'cod', cod);
console.log(rtf);
return rtf;
};
The code above returns undefined. I can't get to make this function working properly.
I have tried console.log(results). The query works like a charm. Only thing I can't get to work is to catch the result from an external function.
Any thoughts? Thanks in advance!
You should return the promise and chain it inside isExpired function.
//wrapper function for testing purposes
var selectOneField = exports.selectOneField = function (tbl, field, pk, pkval) {
var qry_ = "SELECT " + field + " FROM " + tbl + " WHERE " + pk + " = '" + pkval + "'";
return returnResultset(qry_);
};
//...and on another page I want to be able to receive the results from the function above:
var isExpired = exports.isExpired = function (cod) {
return db_.selectOneField('view_expiredusers', 'cod', 'cod', cod)
};
When you call the isExpired in other files you should use the then method of the promise and return the results. do it as follows
var cod_customer = 1;
var isexpired;
isExpired(cod_customer).then(function (results) {
isexpired = results;
console.log(isexpired);
}, function (error) {
console.log("Error: " + error);
});
you are not returning the promise in selectOneField function it must return the promise and also you cant simply do
rtf = db_.selectOneField('view_expiredusers', 'cod', 'cod', cod);
.you will have to use async-await or then
Must be handled this way
//wrapper function for testing purposes
var selectOneField = exports.selectOneField = function (tbl, field, pk, pkval) {
var qry_ = "SELECT " + field + " FROM " + tbl + " WHERE " + pk + " = '" + pkval + "'";
return returnResultset(qry_).then(function (results) {
return results;
}).catch(error) {
console.log("Error: " + error);
})
};
//...and on another page I want to be able to receive the results from the function above:
var isExpired = exports.isExpired = function (cod) {
var rtf = db_.selectOneField('view_expiredusers', 'cod', 'cod', cod).then(rtf => {
console.log(rtf);
return rtf;
});
};
I have the following code which leads to the error: FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - process out of memory
It doesn't make any difference whether I set --max_old_space_size=4096 (or bigger numbers) or not. I have 16 GB RAM on my PC.
System: win10/node.js 6.9.2/mongodb 3.4
I have over 16 000 000 messages in the "chatModel". With a smaller amount of messages the code works.
Do you have any suggestions how to solve the problem/optimize the code?
function sortOutMessages(){
var atSymbol = "#";
var rgx = new RegExp("^\\" +atSymbol);
chatModel.find({messageContent: rgx}, function (err, doc){
var docs = doc;
var docsLength = docs.length;
for (var i =0; i<docsLength;i++) {
var directedMessagesObj = new directedMessagesModel
({
timeStamp: docs[i].timeStamp,
channelName: docs[i].channelName,
userName: docs[i].userName,
userID: docs[i].userID,
messageContent: docs[i].messageContent,
messageLength: docs[i].messageLength,
subscriber: docs[i].subscriber,
turbo: docs[i].turbo,
moderator: docs[i].moderator
});
directedMessagesObj.save({upsert:true}, function (err) {
var fs = require('fs');
if (err) {
fs.appendFile("undefinedLog.txt", "error at " + new Date().toLocaleString() + " directedMessagesObj.save " + "\r\n")
loggerWinston.warn("error at " + new Date().toLocaleString() + " directedMessagesObj.save " + "\r\n");
return console.log(err);
}
});
}
});
}
You are creating docs.length amount of new Promise with this code. What you should be doing instead is to limit the amount of Promise that can be running.
Since what you have been trying to write is a synchronous code, I would advise calling the next dbSave in the callback of the previous one.
If you are after a parallel system, I would create a simple semaphore system.
I advise
module.exports.asyncEach = function(iterableList, callback, done) {
var i = -1,
length = iterableList.length;
function loop() {
i++;
if (i === length) {
done();
return;
}
callback(iterableList[i], loop);
}
loop();
};
then you call asyncEach with async save model is very beter
Thank you all for your answers! I decided to go a different way and it works for now:
var cursor = chatModel.find({messageContent: rgx}).cursor();
cursor.on('data',function (doc) {
var directedMessagesObj = new directedMessagesModel
({
timeStamp: doc.timeStamp,
channelName: doc.channelName,
userName: doc.userName,
userID: doc.userID,
messageContent: doc.messageContent,
messageLength: doc.messageLength,
subscriber: doc.subscriber,
turbo: doc.turbo,
moderator: doc.moderator
});
directedMessagesObj.save({upsert:true},function (err) {
var fs = require('fs');
if (err) {
fs.appendFile("undefinedLog.txt", "error at " + new Date().toLocaleString() + " directedMessagesObj.save " + "\r\n");
loggerWinston.warn("error at " + new Date().toLocaleString() + " directedMessagesObj.save " + "\r\n");
return console.log(err);
}
});
});
Background
I'm just learning node js and have run into a situation where I need to make up to two back to back calls to my redis database, depending on the results of the first query.
The code I have right now works.. but it's very ugly. I wrote it this way because I'm not good with async 'stuff'. But now that it's working... I want to refactor in a way that is readable and of course, in a way that works.
Here's the code, along with an explanation of what I'm trying to do:
Code
router.get('/:ip', function(req, res, next) {
var ip = req.params.ip;
if ( ! validate_ipV4(ip) ) {
res.status(400).send("Invalid IP");
return;
}
var three_octets = extract_octets(ip, 3);
var two_octets = extract_octets(ip, 2);
if (debug) { winston.log('info', 'emergency router.get() attempting hget using :' + three_octets); }
redis.hget("e:" + three_octets, 'ccid', function (e, d) {
if (e){
winston.log('error', 'hget using key: ' + octets + ' failed with error: ' + e);
res.status(500).send("Database query failed");
return;
}
if (d) {
if (debug) { winston.log('info', 'HGET query using ip: ' + ip + ' returning data: ' + d ) };
res.status(200).send(JSON.stringify(d));
return;
} else {
//retry using only 2 octets
redis.hget("e:" + two_octets, 'ccid', function (e, d) {
if (e){
winston.log('error', 'hget using key: ' + octets + ' failed with error: ' + e);
res.status(500).send("Database query failed");
return;
}
if (d) {
if (debug) { winston.log('info', 'HGET query using ip: ' + ip + ' returning data: ' + d ) };
res.status(200).send(JSON.stringify(d));
return;
}else {
res.status(404).send("Unknown IP");
return;
}
});//end hget
}
});//end hget
});
Explanation:
Accept an ip address as input. 10.1.1.1
Try to query the database for a hash that matches the first three octets. For example: "hget e:10.1.1 ccid"
If i have a match, I can return the db results and exit. otherwise, if the query came back with no results, then I need to retry using the first two octets: "hget e:10.1 ccid"
if that returns nothing, then i can exit the GET method.
ASYNC
I know that there is an async module... and i've tried to use MAP before. But from what I understand, you cannot force MAP to exit early.
So for example, if I did something like this:
async.map(ipOctets, hash_iterator, function (e, r) {
})
where ipOctets was an array with both 10.1.1. and 10.1 in it, if the first query found a match in the database, there's no way I can stop it from running the second query.
Can you give me some pointers on how to improve this code so that I don't have to repeat the same code twice?
I also thought of putting the redis.hget call into a separate function... like this:
var hash_get = function (hash, key, field) {
if (debug) { winston.log('info', 'hash_get() invoked with : ' + hash + ' ' + key + ' ' + field);}
redis.hget(hash + key, field, function (e, d) {
if (e){
winston.log('hash_get() failed with: ' + e);
return 500;
}
if (d) {
return (d);
}else {
return 404;
}
});
}
But again, I'm not sure how to do the following in a synchronous way:
call it from router.get
check results
repeat if necessary
Sorry for the noob questions.. but any pointers would be appreciated.
EDIT 1
Since posting, i found this http://caolan.github.io/async/docs.html#some
and I'm currently testing to see if this will work for me.
But please comment if you have some suggestions!
Thanks.
You could use the waterfall method which cascades functions into each other. I really only like to use it when I have 3 nested callbacks or more, otherwise I don't feel like it simplifies it enough.
After looking at your code and seeing how much you can reuse I think I would use async.until though.
router.get('/:ip', function(req, res, next) {
var ip = req.params.ip;
if (!validate_ipV4(ip)) {
res.status(400).send("Invalid IP");
return;
}
let success = false;
let octets_num = 3;
async.until(
// Test this for each iteration
function() { return success == true || octets < 2}, // You would adjust the test to set limits
// Do this until above
function(callback) {
let octets = extract_octets(ip, octets_num);
redis.hget("e:" + octets, 'ccid', function(e, d) {
if(e) {
winston.log('error', 'hget using key: ' + octets + ' failed with error: ' + e);
res.status(500).send("Database query failed");
}
else if(id) {
if (debug) { winston.log('info', 'HGET query using ip: ' + ip + ' returning data: ' + d ) };
res.status(200).send(JSON.stringify(d));
success == true;
}
else
{
octects_num--;
}
callback(null);
});
}
// After success or not found within 3 or 2 octets
function(err, result) {
if(success == false) {
res.status(404).send("Unknown IP");
return;
}
}
...
}
This permits you to reuse the same chunk of code with minimal variation. It's rough and I don't have the rest of your application to test it, but I hope you get the idea.
Maybe like this:
router.get('/:ip', function (req, res, next) {
var ip = req.params.ip;
if (!validate_ipV4(ip)) {
res.status(400).send("Invalid IP");
return;
}
var three_octets = extract_octets(ip, 3);
var two_octets = extract_octets(ip, 2);
//if (debug) { winston.log('info', 'emergency router.get() attempting hget using :' + three_octets); }
var hash = "e:"
var field = 'ccid';
async.waterfall([
function (callback) {
hash_get(hash, three_octets, field, callback)
},
function (d, callback) {
if (d) {
callback(null, d);
return;
}
hash_get(hash, two_octets, field, callback)
}
], function (err, result) {
if (err) {
winston.log('error', err.message);
res.status(err.status).send(err.message);
return;
}
if (result) {
res.status(200).send(JSON.stringify(result));
return;
}
res.status(404).send("Unknown IP");
return;
});
});
var hash_get = function (hash, key, field, callback) {
if (debug) { winston.log('info', 'hash_get() invoked with : ' + hash + ' ' + key + ' ' + field); }
redis.hget(hash + key, field, function (e, d) {
if (e) {
callback({ status: 500, message: 'hget using key: ' + key + ' failed with error: ' + e });
return;
}
if (d) {
if (debug) { winston.log('info', 'HGET query using ip: ' + ip + ' returning data: ' + d) };
callback(null, d);
} else {
callback(null, null);
}
});
}
Check Async.waterfall() for this as you want the result of one callback into another (http://caolan.github.io/async/docs.html#waterfall).
Async.map could not be used as it will hit both the octets at the same time
which you don't want .
Code
router.get('/:ip', function(req, res, next) {
var ip = req.params.ip;
if ( ! validate_ipV4(ip) ) {
res.status(400).send("Invalid IP");
return;
}
var three_octets = extract_octets(ip, 3);
var two_octets = extract_octets(ip, 2);
var redis_hget=function(octets){
redis.hget("e:"+octets,'ccid',function(e,d){
callback(null,d)
})
}
if (debug) { winston.log('info', 'emergency router.get() attempting hget using :' + three_octets); }
async.waterfall([
function(callback){
redis_hget(three_octets)
},
function(d,callback){
if(d)
callback(d)
else
redis_hget(two_octets)
}
],function(err,result){
if(err){
winston.log('error', 'hget using key: ' + octets + ' failed with error: ' + e);
res.status(500).send("Database query failed");
return;
}else{
if(result){
if (debug) { winston.log('info', 'HGET query using ip: ' + ip + ' returning data: ' + d ) };
res.status(200).send(JSON.stringify(d));
return;
}else{
res.status(404).send("Unknown IP");
return;
}
}
})
}
I've the following code:
function query1() {
var defered = Q.defer();
console.log("In query1");
var connection = mysql.createConnection({
host: '........',
user: 'm...c....a.....i',
password: '......Z....9...K',
database: '.....ol'
});
connection.connect(function(err) {
if (!err) {
console.log("Database is connected ...");
} else {
console.log("Error connecting database ...");
}
});
sql = '' +
'select c.ID as CENA_ID, ' +
' c.I_KEY as CENA_NUMERO, ' +
' c.NM_CENA as CENA_NOME, ' +
' b.DS_MAC as MAC_BOX, ' +
' v.DS_CLIENTID as ALEXA_ID, ' +
' v.FK_ID_GRUPO as GRUPO_ID ' +
' from TB_DISPOSITIVOS_VOZ v ' +
' inner join TB_GRUPOS g ' +
' on g.ID = v.FK_ID_GRUPO ' +
' inner join TB_CENAS c ' +
' on g.ID = c.FK_ID_GRUPO ' +
' inner join TB_CENTRAIS b ' +
' on g.ID = b.FK_ID_GRUPO ' +
'where v.DS_CLIENTID = "' + userId + '" ' +
'and lower(c.NM_CENA) like "%' + sceneName.toLowerCase() + '%"';
console.log("Created query");
try{
connection.query(sql, function(erro, rows, fields) {
if (!erro) {
console.log("Executed query verifying the userId");
contador = 0;
if (rows.length > 0) {
cena_id = rows[0].CENA_ID;
cena_numero = rows[0].CENA_NUMERO;
cena_nome = rows[0].CENA_NOME;
alexa_id = rows[0].ALEXA_ID;
grupo_id = rows[0].GRUPO_ID;
mac_box = rows[0].MAC_BOX;
contador = contador + 1;
}
console.log("contador: " + contador);
} else {
console.log("Error - getting the Alexa register in database" + erro);
context.fail("Error - getting the Alexa register in database" + erro);
}
});
}catch (ex){
console.log("exception: " + ex);
}
}
And this code as well:
Q.all([query1()]).then(function(results) {
console.log("Q.all log function");
if (contador > 0) {
console.log("contador > 0");
var client = mqtt.connect('mqtt://.............com');
console.log("connected to MQTT broker");
var buffer = [26,
0,0,0,0,555,645,0,0,0,0,0,
0,5555,2,Math.floor((Math.random() * 200) + 1),
0,0,0,333,13,4,0,1,0,
cena_numero
];
console.log("Created buffer");
client.on('connect', function() {
client.publish('n/c/' + mac_box + '/app', buffer);
console.log("sent MQTT");
});
speechOutput = "Command " + sceneName + " executed successfully";
repromptText = "";
console.log("Process executed successfully")
} else {
console.log("contador <= 0");
speechOutput = "This command was not found!";
repromptText = "";
}
}, function (reason) {
console.log("reason: " + reason);
});
How can I do for the second code execute only if the first query1() executed correctly? Because in the function query1() i've a MySQL Query, and I only can continue with the process after the result of this query.
Anyone can help me?
Thanks a lot!
You're missing some key concepts regarding callbacks and asynchronous behavior in Node.js. You're using the "Q" library (btw I'd recommend trying bluebird instead) to handle promises, but your "query1" function does not return a promise. That's why query1 executes but your "Q.all log function" will execute before query1 is finished.
You can structure your code like this instead (I'll give an example with bluebird since I'm more familiar with it):
var Promise = require('bluebird');
var _connection;
function query1() {
return new Promise(resolve, reject) {
//open your connection
connection.open(function (err, connection) {
if (err) return reject(err);
_connection = connection;
//do your query
_connection.query(sql, [params], function (err, data) {
if (err) return reject(err);
else resolve(data);
});
});
});
}
function query2(data) {
return new Promise(resolve, reject) {
//do your query, using data passed in from query1
_connection.query(sql, [params], function (err, data) {
if (err) return reject(err);
else resolve(data);
});
});
}
query1
.then(function (data) { query2(data); })
.catch(function (err) {
console.log('error:', err);
});
Also, just FYI, concatenating SQL string like this is a no-no that will open you up to a SQL injection attack:
like "%' + sceneName.toLowerCase() + '%"
Instead, use like "%?%" and call your SQL with connection.query(sql, [sceneName], function(err, data) {}). Hope this helps.
I solved my problem with asyncpackage like this:
var async = require('async');
async.series([
function(callback) {
//action 1...
},
function(callback){
//action 2...
}
], function(err) {
if (err) {
speechOutput = "Scene not found!";
repromptText = "Please try again.";
}
console.log("Before speechOutput");
callback(sessionAttributes,
buildSpeechletResponse(cardTitle, speechOutput, repromptText, shouldEndSession));
});
In my node.js application I want to write some data to a logfile when the server is shutdown (thus when CTRL+C has been done in the cmd). The problem is that the process.exit() is called before the writing to the file is finished. I tried using a callback and jQuery $.Deferred.resolve(), but to no avail: probably because the file-write is async but I'd like to keep it asynchronous.
The callback code:
if (process.platform === "win32"){
var rl = readLine.createInterface ({
input: process.stdin,
output: process.stdout
});
rl.on ("SIGINT", function (){
process.emit ("SIGINT");
});
}
process.on ("SIGINT", function(){
var stopServer = function() {
//this happens way too early, the logger.log has not written it's data yet
process.exit();
};
var logServerStop = function(callback) {
logger.log("SERVER SHUTDOWN: ", true);
logger.log("-----------------------------------------");
logger.log("");
callback();
};
logServerStop(stopServer);
});
And the logger.log code:
var fs = require('fs');
var filename = './output/logs/logfile.txt';
exports.log = function(data, addDate){
if (typeof addDate === 'undefined') { myVariable = false; }
var now = new Date();
var date = now.getDate() + "-" + (now.getMonth() + 1) + "-" + now.getFullYear();
var time = now.getHours() + now.getMinutes();
if(addDate){
data = data + date + " " + now.toLocaleTimeString();
}
var buffer = new Buffer(data + '\r\n');
fs.open(filename, 'a', function( e, id ) {
if(e){
console.log("Foutje: " + e);
}
else{
fs.write( id, buffer, 0, buffer.length, null, function(err){
if(err) {
console.log(err);
} else {
console.log("De log file is aangevuld.");
}
});
}
});
};
I'd also like to keep the log-function as it is (so I wouldn't like having to add a callback-function parameter, I'd like my problem to be handled in the callback code. Thanks in advance.
Edit 1
process.on ("SIGINT", function(){
logger.log("SERVER SHUTDOWN: ", true);
logger.log("-----------------------------------------");
logger.log("", false, function(){
process.exit();
});
});
And the logger.log changes:
exports.log = function(data, addDate, callback){
if (typeof addDate === 'undefined') { myVariable = false; }
var now = new Date();
var date = now.getDate() + "-" + (now.getMonth() + 1) + "-" + now.getFullYear();
var time = now.getHours() + now.getMinutes();
if(addDate){
data = data + date + " " + now.toLocaleTimeString();
}
var buffer = new Buffer(data + '\r\n');
fs.open(filename, 'a', function( e, id ) {
if(e){
console.log("Foutje: " + e);
}
else{
fs.write( id, buffer, 0, buffer.length, null, function(err){
if(err) {
console.log(err);
} else {
console.log("De log file is aangevuld.");
}
});
}
});
if(typeof(callback)=='function'){ callback(); }
};
Please see the edits to the log function.
exports.log = function(data, addDate, callback){
if (typeof addDate === 'undefined') { myVariable = false; }
var now = new Date();
var date = now.getDate() + "-" + (now.getMonth() + 1) + "-" + now.getFullYear();
var time = now.getHours() + now.getMinutes();
if(addDate){
data = data + date + " " + now.toLocaleTimeString();
}
var buffer = new Buffer(data + '\r\n');
fs.open(filename, 'a', function( e, id ) {
if(e){
console.log("Foutje: " + e);
//execute call back here.
if(typeof callback === 'function'){
callback(e);
}
}
else{
fs.write( id, buffer, 0, buffer.length, null, function(err){
if(err) {
console.log(err);
} else {
console.log("De log file is aangevuld.");
}
//execute call back here.
if(typeof callback === 'function'){
callback(err);
}
});
}
});
};
In callback you can pass your error as first parameter, then when you call logger.log you can do this as below:
process.on ("SIGINT", function(){
logger.log("SERVER SHUTDOWN: ", true);
logger.log("-----------------------------------------");
logger.log("", false, function(e){
if(e){
//Handle error here.
}
process.exit();
});
});