The rails way of real time
Rails is a development tool that provides web developers a framework and structure to introduce all the code they write.
The Rails framework allows developers to create websites and applications.
Rails are written in Ruby, the programming language, which is also used with Rails. Ruby’s call for developers lies in the elegance and brevity of the language.
Why we wish to use ruby on rails:
The programming process in Ruby is substantially faster than other frameworks and languages, because of the Ruby object-oriented nature and extensive collection of source codes available in the Rails community.
Rails conventions also allow developers to move between Rails projects because each project tends to follow the same structure and coding practices.
Rails is good for fast application development (RAD) as framework made simpler to make changes.
As you know, Rails 5 came out with an exciting new companion! Let’s welcome the Action Cable, the new framework that assimilates the WebSocket communication with Rails.
What is the Action cable?
How Action cable performs
To get the feeling how Action Cable works, we have created a simple chat application. It is a login based system to exchange messages; you can have room to display messages. Also, you can see users who are online. Now I’m going to talk about the mainstream related to action cables.
When you design your Rails 5 application, you see a new folder in the application directory, named as channels folder.
Under channels folder, you will find an application_cable folder that contains two files named as channel.rb file and connection.rb file.
The connection.rb file comes from ActionCable::Connection::Base in a base form for general authentication. We can utilize this section to find the database for a particular user who is making connection.
The channel.rb derived from ActionCable::Channel::Base is related to ApplicationController in our standard Rails application.
So now, we can see we have two subsequent channels in the folder, named as the appearance_channel.rb and the room_channel.rb. So there are channels which we created. The channels have the same methods either subscription or without subscription:
– The subscribed callback is raised when a subscription starts on the client side;
– The unsubscribed callback is raised when a subscription is closed on the client side.
AppearanceChannel also has two approaches that can be called by the client. First is RoomChannel method and another is named as speak method, which is cast-off by the client to send and receive messages through the channels.
On the client side, we can see the cable.js file which is liable for creating the connection between the server and the client.
Then we have channel’s subscribers. In this example, we see subscribers to which the appearance channel is connected, and the subscriber channel that connects the original channel.
Just take a glance at the above picture exactly how the channel subscription is created.
Subscribers have few methods in common:
– The connection method is drawn when the subscription is available for use on the server;
– Lastly, he receives the connection when the server sends data to the user.
Real-Time Rails: Applying WebSockets in Rails 5 with the help of Action Cable
For the past few years, we have seen the rise of “Real-time Web.” Web applications which we use every day are dependent on real-time features like new posts appears automatically on top of our feeds without lifting our fingers.
There are many strategies and technologies to implement this real-time functionality; the WebSocket protocol has been on fame since its development in 2009. Implementing the WebSocket protocol in Rails was quite difficult before the invention of Rails 5, but it becomes quite easy after the launch of Rails 5 which is developed in a way to support real-time apps with Action Cable.