Gartner Research

Assessing Event-Driven Architecture for Scalable and Reactive Web Applications

Published: 08 February 2017

ID: G00310108

Analyst(s): Brad Dayley


Evolving user expectations and digital business demands require technology professionals responsible for creating web apps to deliver highly reactive, scalable and flexible solutions. Event-driven architecture, modern JavaScript, WebSockets and back-end services help satisfy those demands.

Table Of Contents


  • Event-Driven Web Application Architecture in a Nutshell
  • Navigating the Complexities of Designing Event-Driven Web Applications
    • Understanding Design Complexities for Event-Driven Web Applications
    • Understanding the Runtime Concerns for Event-Driven Web Applications
  • Contrasting Traditional Request-Driven and Event-Driven Communication
    • Traditional Request/Response Web Application Communication
    • Two-Way Event-Driven Web Applications Using WebSockets
  • Event-Driven Web Client Architecture
    • Client Event Mediator
    • Client WebSocket Connection to Back End
  • Event-Driven Web Back-End Architecture
    • Event-Driven Back-End Services
    • Back-End Event Mediator and WebSocket Connection
    • Persisting Event-Driven State
    • Connecting Event-Driven Web Applications With External EDA Systems
  • Event-Driven and Request/Response: The Best of Both Worlds
  • Strengths
  • Weaknesses


Gartner Recommended Reading

©2021 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. and its affiliates. This publication may not be reproduced or distributed in any form without Gartner’s prior written permission. It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact. While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such. Your access and use of this publication are governed by Gartner’s Usage Policy. Gartner prides itself on its reputation for independence and objectivity. Its research is produced independently by its research organization without input or influence from any third party. For further information, see Guiding Principles on Independence and Objectivity.

Already have a Gartner Account?

Become a client

Learn how to access this content as a Gartner client.