How to implement "real-time" report with automatic refresh/update?

We need to create a report that queries a real-time database (TimesTen) and automatically refreshes data on an administered schedule, as frequently as every 3 seconds.  How can this be done in a Crystal report launched from the Crystal Report server?

Also the report will have 2 sub-reports, 1 query per sub-report.

The high-level algorithm, using the Java SDK, would be something like:

viewer = new CrystalReportViewer

viewer.setReportSource

viewer.View

while true

     sleep(x)

     viewer.refresh()

viewer.dispose

Any specifics on how to do this code?

Thanks!