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Micro Services, Scala, Node, Ruby and Python

Micro Services

A micro service is a software architecture that is gaining rapid adoption by cloud native companies.

Popularized by companies such as Netflix, Gilt Groupe, Twitter, and Hub Spot are micro services enabled organizations that dramatically shorten the time required to bring new functionality to market.





Traditional cloud applications were built and deployed as a single monolithic applications.

With micro services, software applications are built as a set of loosely coupled, self-contained services that connect to each other over a network.

Ultimately, micro services can accelerate innovation, as they empower small development teams to quickly test and iterate with real market feedback and data.

When you look at large scale systems from Google, Twitter, eBay, and Amazon, their architecture has evolved into something similar: a set of polyglot micro services.


Disadvantages of Monolith Application

Difficult to deploy and maintain

Obstacle to frequent deployments

Makes it difficult to try out new technologies / framework

Advantages of Micro services

Business Agility - Easier to develop, understand and maintain. Starts faster than monolith, speeds up deployments.

Decomposing - Strategies for decomposing each function into its own process.

Flexibility - Independently replaceable and upgradable.

Scaling - Each service can scale on X-and Z-axis.

Risk Isolation - Improves fault isolation.

No Technology commitment - Eliminates any long-term commitment to one single technology stack. Freedom of choice of technology, tools, and frameworks.

Database - Decentralized Data Management


NoOps:

Service replication (k8s,fabric8,etcd,ZK,...).

Dependency resolution (Nexus, ...).

Failover (Circuit Breaker).

Resiliency (Circuit Breaker).

Service Monitoring, alerts and events (New Relic, Log stash, ...).


Node JS : Asynchronous & Non-Blocking IO Paradigm

Node js is one of the non-blocking and asynchronous JavaScript on the server for super-fast yet simple web applications and mobile back ends.

Node.js is a JavaScript runtime that uses the V8 engine developed by Google for use in Chrome. V8 compiles and executes JavaScript at lightning speeds mainly due to the fact that V8 compiles JavaScript into native machine code.

Node JS allows to easily build high performance applications. Node JS meets all your expectations, it helps to simplify work. It is easy to modify and maintain. With Node JS a group of small applications is developed instead of one large application.

On Node JS it is possible to merge web and back end developers into one unit this makes development efficient. It's perfect for handling lots of request that are I/O driven and scales very nicely.

Node.js has become the fastest growing web platform ever, with a truly rich and vibrant eco-system. it's easy to see why - node is not only extremely performant and productive, it's also written in the world's most popular programming language – Java Script.

Real-time Made Easy

If Node.js excels at many concurrent connections, then it makes sense that it excels at multi-user, real-time web applications like chat and games.

Node's event loop takes care of the multi-user requirement. The real-time power comes thru use of the websocket protocol.

Websockets are simply two-way communications channels between the client and server. So the server can push data to the client just as easily as the client can. Websockets run over TCP, avoiding the overhead of HTTP.




Sails.js

Sails.js boasts a large and active community on GitHub, with thousands of people who either follow the repository or who have forked it.

Such a large following indicates solid adoption from the community, which ensures a more mature and robust product.

Node.js offers speed and a nonblocking I/O API

Node.js was created because concurrency is difficult in many server-side programming languages, and often leads to poor performance.

Node.js provides an event-driven architecture and a nonblocking I/O API that optimizes an application's throughput and scalability.

Developers write simple code and Node.js takes over. Node.js uses an event loop, instead of processes or threads, to scale.

Callbacks are defined, and the server automatically enters the event loop at the end of the callback definition.

Node.js exits the event loop when there are no further callbacks to be performed.


Database Adapters :

Adapters are available in the Sails.js community for MySQL, MongoDB, PostgreSQL, Redis, and Microsoft SQL Server.

This was important for the Any Presence platform because being able to use a single framework regardless of the back-end data store makes life much simpler.

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Scala

Scala is an open source object-functional programming language that was developed for the web to overcome the limitations of Java. The Scala programming language allows the Scala developer to write programs in Scala combining the benefits of Python and Java. It is much smaller and concise when compared to other programming languages and as it is running on an open source platform which is free, the development cycle will be both fast and affordable.

Why Invest in Scala Web Development?


Twitter switch from Ruby to Scala and the JVM has given Twitter a performance boost from 200–300 requests per second per host to around 10,000–20,000 requests per second per host.

This boost was greater than the 10x improvement that Twitter's engineers envisioned when starting the switch. The continued development of Twitter has also involved a switch from monolithic development of a single app to an architecture where different services are built independently and joined through remote procedure calls which is a Micro service.

Scala makes web applications work efficiently, and that is the main reason why it has been successfully adopted by web giants such as LinkedIn and Twitter. Further, it is also an open source programming language which can be used by anyone. These are some of the many reasons for the rapid growth of Scala in India.

Here are a few reasons for your organization to consider:

The fact that Scala is open source and free, reduces the cost of development significantly as there are no upfront costs or royalty fees.

Scala is concise and requires minimal development time.

Scala is a robust static system and an established Play framework that is very similar to Java

It was specifically built to make high traffic websites both dependable and reliable


Frameworks : Activator Akka HTTP Lift Play ScalatraSlick Spray Spark


Play Framework makes it easy to build web applications with Java & Scala.Play is based on a lightweight, stateless, web-friendly architecture.Built on Akka, Play provides predictable and minimal resource consumption (CPU, memory, threads) for highly-scalable applications.

Scale predictably.


Underneath the covers Play uses a fully asynchronous model built on top of Akka. Combined with being stateless, Play scales simply and predictably.

Stateless Web Tier

Non-blocking I/O

Built on Akka

Real-time enabled


Sweet Framework

A Scala framework for building dynamic web applications.Sweet is a much simpler framework than Lift and easy to get started with. There is clear documentation available on the project's wiki.

Sweet is a web application framework for building dynamic web content that runs on any Java servlet server. The framework is made with Scala, a more advance and easier to write programming language compared to Java. Since Sweet applications can run on a Java Virtual Machine, it can take advantage of all the Java libraries, servers, and large communities.

Life Framework

Lift is an expressive framework for writing web applications.As Scala program code executes within the Java virtual machine (JVM), any existing Java library and web container can be used in running Lift applications.

Ruby on Rails and Python with Django Framework

Ruby on Rails


Ruby on Rails (RoR) is a web framework written in Ruby and is frequently credited with making Ruby “famous”.

A scripting language more powerful than Perl and more object-oriented than Python.Designed for programmer productivity and joy instead of machine efficiency.

Rails puts strong emphasis on convention-over-configuration and testing. Rails CoC means almost no config files, a predefined directory structure and following naming conventions.

There’s plenty of magic everywhere: automatic imports, automatically passing controller instance variables to the view, a bunch of things such as template names are inferred automatically and much more. This means a developer only needs to specify unconventional aspects of the application, resulting in cleaner and shorter code.

Purpose : Rails is a web framework and it is suitable for Ecommerce applications and Social development applications.



Python with Django Framework

Django is a web framework written in Python and was named after the guitarrist Django Reinhardt.

Django follows explicit is better than implicit (a core Python principle), resulting in code that is very readable even for people that are not familiar with the framework.

A project in Django is organized around apps.

Each app has its own models, controllers, views and tests and feels like a small project. Django projects are basically a collection of apps, with each app being responsible for a particular subsystem.

Purpose : Django is a web framework and it is suitable for web applications, Big data and cross platform development.