Learning the Go programming language, I wanted to implement an application that I had written with other languages and frameworks before to get a grip on this language. That’s why I tried to implement a really simple websocket chat server in Go and described my approach in the following article. Go Websocket Chat Implementation Writing the Chat Server Websocket Chat in Action ...
Vert.x is a modern, lightweight framework to build high performance applications running on the Java Virtual Machine. The framework is polyglot so that you’re able to write your application in Java, Groovy, Ruby, Python or even JavaScript. In addition it offers a nice component system, an actor-like concurrency model a distributed event bus and an elegant API to create scalable applications in no time. In the following tutorial we’re going to build a websocket chat by creating a HTTP server and the websocket server using Vert.x, Java and Maven. ...
Java EE 7 is out now and so I was curious to play around with the new specifications and APIs from in this technology stack. That’s why I didn’t hesitate to add yet another websocket-chat tutorial to the existing ones on the internet in favour of gathering some experience with this technology and a possible integration using a GlassFish 4 server, the new Java API for JSON Processing for data serialization combined with custom websocket encoders/decoders and finally adding some Bootstrap and jQuery on the client side. ...
The HTML5 working draft describes different techniques to push information from a server to the client and the one described in this tutorial are Server-Send Events (SSE). Using Server-Send-Events eliminates the need to poll a server periodically for information using AJAX and is really easy to implement because of the simple specification and the fact that nearly all modern browsers already implement this specification. The Client Side Registering for Server Send Events (SSE) is quite easy .. simply create a new EventSource object that is bound to the URL where the events are propagated. ...
Some funny stuff can be done using HTML 5, canvas elements and the video events API. In the following example we’re using these techniques to apply graphic effects to a video embedded in a HTML page.. The Goal Please take a look at the following screencast on YouTube to get an idea of what the final example looks like or just take a look at the demo page. As you can see a video is rendered and a clone is displayed with a strange swirl effect applied. ...