On Sun, Nov 20, 2011 at 8:59 PM, James <james.eliye...@gmail.com> wrote:
> Dear wicket community, > > In a project that I'm working on, I need to build a "live log viewer" or > "dynamic log viewer" or "refreshable log viewer". > Much like how hudson/jenkins displays the console output. > > The idea is to dynamically display the new data added to a log file along > with the existing content. > > How to go about doing this? Please throw some light on this. > > I searched about this in the web, mailing lists but couldn't find what I > was looking for, so I'm posting it here. > If this is asked elsewhere, kindly re-direct me to the respective resource. > I suppose you're only asking about the web UI portion of this application. The service / backend stuff is out of the context of this forum. (Although I would suggest looking at using something like Camel that has all the necessary stuff for monitoring files and file streams and then routing messages through to your application and/or other processors - see [1] below). For the web UI part, there are basically two methods: push, poll 1 - push - using something like cometd, etc to do AJAX push events (really, these are long-pollers, leaving long-running HTTP requests going and processing a stream of events that are received over the life of the connection) 2 - poll - if you have some component that shows the last X lines of a log file, just call component.add(new AjaxSelfUpdatingTimer(someDuration)). As long as you've written your IModel correctly (it always retrieves the most up-to-date data), this will work "out of the box" [1] http://camel.apache.org/stream.html - and things like scanStream -- Jeremy Thomerson http://wickettraining.com *Need a CMS for Wicket? Use Brix! http://brixcms.org*
