Event-Driven Application

Event-driven applications perform based on events, which are things that take place in the application and trigger a response. Event-driven applications are designed with event-driven programming, a programming paradigm in which events that occur trigger a series of actions. These actions are programmed into the application so that they’ll always happen when a corresponding event takes place. Events contain metadata, additional details about the event.

Examples of event-driven applications

Event-driven applications feature real-time responses and are often a better solution for businesses that require instant actions or notifications. To show how event-driven apps can work, here are a few examples:

  • Home security applications might notify a homeowner when someone comes to their front door. An event might occur when the nearby sensor or camera picks up motion from the door. That event triggers a response that eventually results in informing the homeowner that someone is at their door.
  • On the social app GroupMe, actual, physical events (not “events” as we use the term here) that a user creates, such as a birthday party, triggers reminders to the app. Reminders like “Birthday Party is starting in one day” or “Birthday party starts in one hour” don’t come from humans managing the app; they happen automatically because the event triggers those notifications.
  • In banking, an app might be programmed to flag large transactions or something that appears fraudulent. When a large transaction or fraudulent activity occurs, that event triggers a response, like a notification to the account owner.

Event-driven architecture

Event-driven apps are part of event-driven architecture, an entire application infrastructure based around responding to events. This architecture, known as EDA, better meets the demand for real-time response to data than previous systems. Previous technology required human users to make a request from a system and then wait for a response. In development, it’s sometimes known as request-driven programming. This is a slow process compared to event-driven applications.

How do event-driven applications work?

Event-driven applications are programmed to react in a certain way to an event. This triggered response, known as an event loop in programming, can’t be altered once it has begun. Event-driven apps are more complex to design and program than other applications (like a request-driven one) because they are more loosely coupled. However, that loose coupling means that all the hardware and software involved don’t have to be completely connected, so event-driven apps are also more flexible. They don’t have to be constantly managed or told what to do.

Event-driven apps work by using an event broker. Event brokers might be a software platform or Software-as-a-Service and are responsible for transporting events to the correct location after receiving all event messages. Having a middle-man keeps the entire application from going down if one component fails.

Event-driven apps are typically hosted through serverless computing, based in the cloud. Serverless computing is better for handling large amounts of workloads and events. It enables on-demand application processes but doesn’t require constant server management.

Event-driven apps require real-time responses for uses such as delivery apps, business software, and web analytics tools.

 

 

Jenna Phipps
Jenna Phipps
Jenna Phipps is a writer for Webopedia.com, Enterprise Storage Forum, and CIO Insight. She covers data storage systems and data management, information technology security, and enterprise software solutions.

Related Articles

AutoIt Scripting Language

AutoIt is a popular and easy-to-learn scripting language used by developers since 1999 for quick software development. Here’s more about AutoIt scripting language, its...

Sales CRM

A sales CRM, or customer relationship management (CRM) tool for sales, is frequently the centerpiece of sales operations for a variety of business use...

HighLevel CRM

HighLevel is a sales and marketing customer relationship management (CRM) solution designed by the company HighLevel. Because it's uniquely designed for marketing agencies, HighLevel...

CRM Manager

A customer relationship management (CRM) manager is a person that oversees all customer and client relations within a business. They specialize in customer interactions...

AutoIt Scripting Language

AutoIt is a popular and easy-to-learn scripting language used by developers since 1999...

HighLevel CRM

HighLevel is a sales and marketing customer relationship management (CRM) solution designed by...

Unified Endpoint Management (UEM)

As enterprise networks become increasingly distributed with growing numbers of remote workers, unified...