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Electronic Engineering. Examples of Where Node.
From IRC back in the day , through many proprietary and open protocols running on non-standard ports, to the ability to implement everything today in Node. The chat application is really the sweet-spot example for Node. In the simplest example, we have a single chatroom on our website where people come and can exchange messages in one-to-many actually all fashion.
For instance, say we have three people on the website all connected to our message board. On the server-side, we have a simple Express.
Server-side component of the websocket connection receives the message and forwards it to all other connected clients using the broadcast method. All clients receive the new message as a push message via a websockets client-side component running within the web page. They then pick up the message content and update the web page in-place by appending the new message to the board.
This is the simplest example. For a more robust solution , you might use a simple cache based on the Redis store. But regardless of the improvements that you make, Node. JSON stored data allow Node. With Node. In sum, you can avoid the need for multiple conversions by using a uniform data serialization format across the client, server, and database.
As depicted above, Node. But because database access is a blocking operation in this case , we run into trouble. Data gets queued through some kind of caching or message queuing infrastructure—like RabbitMQ or ZeroMQ—and digested by a separate database batch-write process, or computation intensive processing backend services, written in a better performing platform for such tasks.
In short: with Node, you can push the database writes off to the side and deal with them later, proceeding as if they succeeded. This observation can be utilized in Node.
This could be done for real-time audio or video encoding , and proxying between different data sources see next section. An example: consider a server-side application communicating with third-party resources, pulling in data from different sources, or storing assets like images and videos to third-party cloud services.
Although dedicated proxy servers do exist, using Node instead might be helpful if your proxying infrastructure is non-existent or if you need a solution for local development. By this, I mean that you could build a client-side app with a Node.
Switching to a real-time web-based solution would allow brokers to easily switch workstations or working places. Soon, we might start seeing them on the beach in Florida.. You could be gathering real-time stats from your user, or even moving it to the next level by introducing targeted interactions with your visitors by opening a communication channel when they reach a specific point in your funnel.
Imagine how you could improve your business if you knew what your visitors were doing in real-time—if you could visualize their interactions. With the real-time, two-way sockets of Node.
With the Node. Note: Don't try to build hard real-time systems in Node i. Erlang is probably a better choice for that class of application. Where Node.
However, while possible, this request-response paradigm in which Node. There are arguments to be made for and against this approach. This eases development including hiring significantly. Using Node. Relational DB tools for Node.
On the other hand, Rails automatically provides data access setup right out of the box together with DB schema migrations support tools and other Gems pun intended. Rails and its peer frameworks have mature and proven Active Record or Data Mapper data access layer implementations.
As stated previously, Node. You can also run several Node. With clustering, you should still offload all heavy computation to background processes written in a more appropriate environment for that, and having them communicate via a message queue server like RabbitMQ. Even though your background processing might be run on the same server initially, such an approach has the potential for very high scalability.
Those background processing services could be easily distributed out to separate worker servers without the need to configure the loads of front-facing web servers.
Tweet Remember: Node. Why use Node. If your use case does not contain CPU intensive operations nor access any blocking resources, you can exploit the benefits of Node. Welcome to the real-time web.
Understanding the basics What is Node.