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Stand-alone Java Client for jWebSocket Server – communicating from Java Client to Web Clients and vice versa over WebSockets

0
1 year ago
by Lucas Jellema in ,

In a previous article, I have discussed the open source jWebSocket Server and a simple installation and configuration (http://technology.amis.nl/blog/14940/first-steps-with-jwebsocket-open-source-java-framework-for-websockets-installation-and-running-samples). Subsequently, I have shown the implementation of a web client for a synchronized Slideshow application, where WebSocket communication is used to perform Client 2 Client push (http://technology.amis.nl/blog/14949/push-based-synchronized-slideshow-web-application-implemented-using-websockets-and-jwebsocket-server-the-open-source-java-websocket-server). In a third article I have explained how jWebSocket server can be integrated with a Java application that can start the server and interact with it (http://technology.amis.nl/blog/14973/implementing-a-java-server-side-component-for-jwebsocket-server-for-websocket-interaction-with-web-clients). Finally in this article I demonstrate how a stand alone Java Client can connect to a ‘remote’ jWebSocket server and open WebSocket interactions with it.

The functionality realized in this article is a simple Java application that listens to slide selection events as pushed from the clients More >

Vacatures bij AMIS services

Push-based synchronized slideshow web application – implemented using WebSockets and jWebSocket server – the open source Java WebSocket server

2
1 year ago
by Lucas Jellema in ,

In a recent article, I have introduced jWebSocket – an open source Java based server for WebSocket communication: http://technology.amis.nl/blog/14940/first-steps-with-jwebsocket-open-source-java-framework-for-websockets-installation-and-running-samples. In this article, I have described how to download and install the jWebSocket server and how to get going with running some of the distributed samples.

In another recent article, I looked at the implementation of a slideshow application where multiple web clients are mutually synchronized using WebSocket based communication using the Kaazing commercial Web Socket Gateway: http://technology.amis.nl/blog/14777/push-based-synchronized-slideshow-web-application-implemented-using-websockets-and-kaazing-websocket-gateway.

In this article, I will implement that same Slideshow application as with Kaazing, this time using the jWebSocket server as my underlying WebSocket infrastructure. It turns out that no server side configuration is required for this initial, somewhat naive implementation that does not use a specific channel but simply has all clients of the jWebSocket server participate in the communication. A more advanced set up would More >

Vacatures bij AMIS services

Push-based synchronized slideshow web application – implemented using WebSockets and Kaazing WebSocket Gateway

9
1 year ago
by Lucas Jellema in , , ,

In the last few articles, I have discussed downloading, installing and running demos for a number of different tools, frameworks and libraries that support push-style (web) applications in one way or another. I have looked into ‘classic’ comet with Grizzly, Atmosphere and CometD as well as ADF Active Data Service and WebLogic Pub/Sub (Bayeux) Channels. I have also looked to WebSockets with jWebSocket, again Atmosphere and CometD and also with Kaazing. I intend to now take a closer look at some of these frameworks, by taking a simple push-style application and implementing it using each of these frameworks. The functionality I will be implementing is simple:

  • through the web client (HTML 5/javaScript), a user can select an image from a list of ‘slides’

  • the selection of the image is communicated to the server (background WebSocket based or alternatively regular AJAX)Comet (Bayeux)/Long Poll style)
  • the server informs all connected clients about the selected image through a pushed message (background WebSocket based or alternatively Comet (Bayeux)/Long Poll style); these clients all synchronize that slide selection
  • a Java (server side) component can also connect to the More >
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