Live charting

boris256

I'm looking to see if I can do live updates (every 30-60 seconds) of a chart in a BIRT report, client-side. All the examples I've been able to find are several years old and written in Java, and I don't see how I can use them. I'm basically looking at two options:

1) If BIRT provides some AJAX-like mechanism for updating report charts, and performance can be optimized sufficiently, I can use BIRT charts.
2) If not, I can use another standard mechanism like JQuery/Highcharts. Then BIRT will provide only the user management/security capabilities and a basic dashboard report which will link to the chart. The chart will just be an HTML/Javascript page that lives on the iServer.

My other consideration is that I need good performance. My charts are fairly complex (upwards of 1000 data points/200 y series groupings). The iServer takes up to several minutes to process a static version of such a report currently. I suspect that the chart engine does not handle high numbers of y series well, hence the bottleneck. Of course this would be unacceptable with live updates, although incremental updates might cut down on the processing time.

Any suggestions welcome!

mwilliams

If you wrote a servlet to return the chart, you could embed the result in a page and use jquery to call the servlet every 30-60 seconds to replace the chart without refreshing the entire screen. I'm working on a blog that hopefully will be out sometime next week that will show a way to do this. That might be a start.