That request could ping a server with a 200 status response, which means the request was successful. Firstly we would begin with an event listener, emitting an event like a function initiating a request. Let’s walk through a Node.js example so that you can see how events would work within the back-end framework. Node.js development How do events work in Node.js? In this tutorial, we will learn how to use events in a NodeJS application and how to create a simple microservice using Node.js. Because of the decoupling between the producer and consumer services, each may be updated, modified, and deployed separately.
These events are sent by a producer and end up in the router, which then filters and dispatches them to consumers. The events can even be identifiers so in the Twitter example, you could get a notification that your tweet has a comment, retweet or likes.Įvent producers, event routers, and event consumers are the main parts of this type of structure. And this event can carry state information such as the time the tweet was posted, the date, the message and other valuable information. That is the equivalent of a state change because our application has either been updated or changed to display some new information. So in the case of Twitter let’s say that we have just posted a new tweet to our timeline. We are going to use a social media network like Twitter as an example so that it becomes pretty straightforward to understand. Events in Node.js are basically a way to manage the state across an application. Microservice-based computer systems are modern computer systems that frequently use events to initiate and facilitate communication between separate services.
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