“Microservices” is the new hot thing and certainly at the peak of the hype cycle. This post is my summary after going through various articles, blogs, courses, videos , books and very brief hands on experience with Microservices. So let’s get started…
“Microservices is an approach to developing a single application as a suite of small services, each running in its own process and communicating with lightweight mechanisms, often an HTTP resource API.”
(Martin Fowler : http://martinfowler.com/articles/microservices.html)
Microservices are simply an architecture style to design an application in a certain way. Some also refer to it as Fine-grained SOA or based on a subset of SOA Principles.Here are some of the characteristics/tenents of Microservices:
Microservices is the the next evolution in Software Decomposition. It enables separation of concerns and reuse which are quite essential in today’s cloud oriented world. Here are my 3 reasons why you should choose a Microservices approach from a Technology point of view:
Does this mean every application should use Microservices approach ? Not necessarily…
One argument is to start with a traditional monolith, and split the application into Microservices once the monolith becomes a problem. Although there are others who say not to start with monolith, since it is very hard to split a monolith.
I think Microservices approach has its own challenges and not every application needs to deal with it (at least initially). But every application should keep this decomposition mindset at the forefront of the architecture so that it’s easier to split in future if we need to.
Here is an great article explaining the four main benefits of Microservices from a Business point of view : Innovate or Die : The Rise of Microservices.
Here are some of the resources that can guide you in building Microservices:
Distributed systems are inherently complex and Microservices approach takes this to the next level.
Here are some of the challenges that Microservices bring to the table:
Hope this gives a good summary of the Microservices world as of today.
Enjoy Microservices…
Here are the slides from my internal talk presented at Neudesic Office Day:
https://speakerdeck.com/jomit/building-next-generation-web-apps
Some of the code for the talk can be found at:
https://github.com/jomit/Node-Cloud
https://github.com/jomit/Node-ES6-Trials
Resources:
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var http = require('http');
var server = http.createServer(function (request, response) {
response.writeHead(200, {"Content-Type": "text/plain"});
response.end("Look ma I am running Node on my Raspberry Pi !\n");
});
server.listen(8080);
console.log("Server running at http://127.0.0.1:8080/");
If your terminate the node app incorrectly you might get the ‘EADDRINUSE’ error message next time cause the port 8080 will still be in use.
To resolve this you can either check for the listening event or kill all the node processes as answered here.
Enjoy JavaScripting on Raspberry Pi…
ASP.net 5 is the new (and significantly redesigned) open source and cross-platform framework for building .NET web applications which can run on both .NET Framework 4.6 and .NET Core.
Enjoy modern web development….
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PhoneGap Desktop app is basically a visual interface for developing phonegap apps easily. For this post I am using the the latest beta release 0.1.11 from github.
I followed the step-by-step instructions from here but it did not work for me. I had to do some additional steps and use the old PhoneGap CLI to make it work.
Here are the high level steps I performed to make it work on my Windows 10 machine
Enjoy JavaScripting on any device…
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Couple of months back docker team announced the new installer Docker Toolbox which replaced the Boot2Docker installer.
I successfully upgraded my machine to Windows 10 (after second attempt) and thought to try this out and so far I love how easy it is to install and get started.
Docker Toolbox includes the following Docker tools:
(Note: If you already have Virtualbox installed make sure you have the IPv4 settings for the adapter set to obtain the IP address automatically.)
Docker Quickstart Terminal
Kitematic (Alpha)
You will need the docker hub account to signin. It allows to manage all your containers and add new ones from the hub.
Next step will be to add some Node goodness (Dockerizing a Node.js web app) and sprinkle the “Microservices” dust . . . 
Enjoy Containerization . . .
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Pluralsight Course - “Node.js for .NET Developers”
MVA Course – “Building Apps with Node.js Jump Start”
node weekly to keep up with all the latest updates in node.js world
Enjoy JavaScripting !!!
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ECMAScript 6 is bringing lot of goodnes and the JavaScript in future might look a lot different than what we see today.
Frameworks like Angular, Backbone, Ember provide a nice wrappers to fill the gaps but ultimately we should keep our eye on ES6.
Here is how you can try ES6 today using compilers like babel and tracer today: http://jomit.blogspot.com/2015/02/trying-ecmascript-6-javascript-6.html
Enjoying Javascripting….
Few months back Microsoft introduced several new API’s for Office 365 for which spun across SharePoint, Exchange, Lync, and rather than having the developers learn each of the platform they simplified the general concepts and also introduced a new type of app - “Office 365 external Apps”
These apps look similar to “Provider Hosted Apps” but the have some key difference in the way you register them and launch them. For more details visit: http://www.sharepointnutsandbolts.com/2014/12/office-365-apps-and-sharepoint-apps-comparison.html
Along with this new type of Apps, Microsoft has also enabled cross-origin resource sharing (CORS) support for Office 365 API’s.
Which means we do not need any special client libraries to authenticate or access these API’s.
Let’s see how we can register this new type of app and then integrate it using vanilla-js.
See complete code on github..
Other Resources:
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I have been working with JavaScript for over 5 years now. In the last 3 years, I have written more JavaScript code than C# code. And still there are parts of the language that amaze me. Who would have thought that 10 days of work could give rise to the assembly language of the web.
What is ECMAScript 6 ?
ECMAScript 6 is the upcoming version of the ECMAScript standard. This standard is targeting ratification in June 2015. ES6 is a significant update to the language, and the first update to the language since ES5 was standardized in 2009. See the draft ES6 standard for full specification of the ECMAScript 6 language.
See detailed list of all the features (along with examples) here : https://github.com/lukehoban/es6features
Which JavaScript Engines are implementing these features ?
Pretty much every browser vendor have started implementing some features, if not all.
Here is a live compatibility dashboard : http://kangax.github.io/compat-table/es6/
And as of today, IE is ahead of everyone in the ‘Desktop Browsers’ category.
How can I try some of these ES6 feature today ?
Here are your options:
Whether you like it or not, JavaScript is here to stay and will play a key role in pushing the web forward..
Summary from the Stanford's Machine learning class by Andrew Ng
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