Over a million developers have joined DZone.
{{announcement.body}}
{{announcement.title}}

Using Server-Sent Events (SSE) with Nothing More Than Servlet

DZone's Guide to

Using Server-Sent Events (SSE) with Nothing More Than Servlet

· Java Zone
Free Resource

Managing a MongoDB deployment? Take a load off and live migrate to MongoDB Atlas, the official automated service, with little to no downtime.

As many of you know, HTML 5 Server-Sent Events (SSE) stands between the two extremes of completely stateless REST/HTTP and fully bidirectional WebSocket. It is a relatively simple mechanism that allows for sending data from the server to the client once a connection is established via plain HTTP. An interesting side-effect of this basic simplicity is you could conceivably use SSE with nothing more than the plain Servlet API. The downside of taking this approach is that you don't have the much higher level, easier to use specialized APIs for SSE such as the ones long included in Jersey (and now being proposed as part of Java EE 8).

The GlassFish team's own Shing Wai Chan explores the idea of using SSE from plain Servlets in an excellent recent post. The post is a very good way of understanding how SSE actually works under the hood. Besides demonstrating the basics of SSE from an HTTP perspective, the post also shows the JavaScript SSE API available on the browser as well as using the Servlet 3 async API and Java EE 7 concurrency utilities with Servlet based SSE.

MongoDB Atlas is the easiest way to run the fastest-growing database for modern applications — no installation, setup, or configuration required. Easily live migrate an existing workload or start with 512MB of storage for free.

Topics:

Published at DZone with permission of Reza Rahman, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

THE DZONE NEWSLETTER

Dev Resources & Solutions Straight to Your Inbox

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

X

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}