Caching report sources

Caching a report source in the session variable allows it to be used multiple times efficiently. When a report source is not cached, the process of creating a new report source multiple times becomes fairly expensive. Furthermore, caching a report source allows reports with or without saved data to be refreshed.

The following example shows how to cache a report source in the session variable:

String report = "/reports/sample.rpt";

ReportClientDocument reportClientDoc = new ReportClientDocument();

reportClientDoc.open(report, 0);

Object reportSource = reportClientDoc.getReportSource();

session.setAttribute("reportSource", reportSource);

Note:    If you are using a cached report source, the dispose methods for the viewer or report source should not be called until the report source is no longer being used.

It is highly recommended that you cache report sources in order to ensure data consistency when viewing reports. Using an uncached report source causes a new report source to be created when any action is performed in the viewer or export control. As a result, using uncached report sources causes the viewer to display some pages with saved data and other pages with live data.



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