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JavaOne 2012: What’s new in Servlet3.1: An Overview

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8 months ago
by Lucas Jellema in , , , ,

Session at JavaOne come in various shapes. Some are visionary, high level and future oriented. Others are detailed and discuss practical, sometimes very fine grained topics. One of the sessions I attended was somewhere in between: future oriented yet pretty concrete at the same time. It was probably my favorite session at JavaOne this year: What’s new in Servlet3.1: An Overview by  Shing Wai Cha and Rajiv Mordani. The passion of the presenters – their enthusiasm to explain the current development of the Servlet API and their ability to demonstrate some rather tough concepts were pivotal. Many presenters can take their style as an example they can learn from.

The Servlet 3.1 API is part of the JEE 7 edition- that is scheduled for complete release in April 2013. The Servlet Specification is largely complete, although some elements are still under discussion as became clear during this talk. The probably most important new requirement in Servlet 3.1 is the ability to do Web Socket interaction. Web Sockets is a relatively new communication protocol that runs over TCP/IP and goes beyond HTTP in several respects. Web Sockets support bi-directional interactions (open channels through More >

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First steps with jWebSocket – open source Java framework for WebSockets – installation and running samples

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1 year ago
by Lucas Jellema in , ,

This month, In have been delving into Push architectures for the Web, looking into WebSockets among several other things. WebSockets, a fairly new standard (!) evolved along with HTML 5, specifies a communication protocol that provides an alternative to classic HTTP communication. WebSocket based interaction has lower overhead and – more importantly – is bi-directional which means that push from server to client is really supported (and not just emulated through poll, long poll or streaming responses as is currently the case in comet push style frameworks).

All modern browsers provide support for the WebSocket specification – meaning they can communicate based on the WebSocket protocol (ws:// and wss:// in addition to http:// and https://) and they implement the WebSocket client side (JavaScript) APIs. These API are well defined – http://dev.w3.org/html5/websockets/ – and seem to be truly standard across all browsers.

The WebSocket server side is at this moment not very well defined. Other than the fact that the communication over ws:// and wss:// should be handled by a server, not much has been decided about the server side of WebSockets. Currently, WebSockets is not supported in More >

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(The slides from) Don't Call us, We'll Push you – on Cross Tier Push Architecture (JavaOne 2011)

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1 year ago
by Lucas Jellema in ,

I just completed my Birds of a Feather session at JavaOne 2011 about Push in an enterprise application architecture. Over 150 attendees were in the audience, many of them asking questions afterwards. It felt like it went well.

The slides for this session are below. I will post source code for the demos at some later stage.

Don't call us – we'll push – cross tier push architecture (JavaOne 2011) View more presentations from Lucas Jellema

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