Does BIRT fetch results on-demand from a scripted data source?

EricB · 2011-07-28T15:25:30+00:00

Hi, Based on this '<a class='bbc_url' href='<a href="https://eclipse.org/birt/release20specs/BPS6%20-%20Report%20Engine%20Scalability%20and%20Performance.pdf'>Report" rel="nofollow">https://eclipse.org/birt/release20specs/BPS6 - Report Engine Scalability and Performance.pdf'>Report</a> Engine…

EricB

Hi, 
 
Based on this '<a class='bbc_url' href='https://eclipse.org/birt/release20specs/BPS6 - Report Engine Scalability and Performance.pdf'>Report Engine Scalability and Performance</a>' paper, I expected that a report spanning multiple pages could display the first page once it had selected enough results to do so. Is this expectation valid? 
 
I tested a simple report that displayed a simple table. The table was bound to a DataSet that was based on a ScriptedDataSource. The DataSet for the test returned 283 records which, when viewed in the BIRT Viewer, spanned 8 pages. 
 
By looking at when BIRT calls in to my ScriptedDataSetEventAdapter.fetch() method, it seems that the first page will not display until BIRT is done fetching all results from the ResultSet. Is this expected behavior? 
 
Thanks, 
 
Eric

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Comments

JasonW

That is the way open source BIRT works. Actuate has a comercial product that does progressive viewing.

Jason

EricB

<blockquote class='ipsBlockquote' data-author="'JasonW'" data-cid="80756" data-time="1311881471" data-date="28 July 2011 - 12:31 PM">
That is the way open source BIRT works. Actuate has a comercial product that does progressive viewing. 
 
Jason </blockquote>
Thanks for the quick response! 
 
-Eric