virtualizer

[bogleg20]

Hi,

 

Can someone help me understand the virtualizer? I have a report that is potentially very large where I get OutOfMemory errors during the fill process. So I've taken the code from the VirtualizerApp demo like this:

 

JRFileVirtualizer virtualizer = new JRFileVirtualizer(2, "temp");

virtualizer.setReadOnly(true);

parameters.put(JRParameter.REPORT_VIRTUALIZER, virtualizer);

report = JasperFillManager.fillReport( design, parameters, dataSource );

 

When I run my code, I see a bunch of serialized pages accumulate in my temp directory which I assume is good. The problem is however, is that the memory usage seems to remain the same. I still seem to run out of memory at approximately the same point. Am I missing something in the usage of the virtualizer?

 

Thanks

 

Chris

[lucianc]

First of all, do virtualizer.setReadOnly(true) only after JasperFillManager.fillReport(..).

 

If you still have a memory issue, make sure first the memory is not consumed by something external to the fill process (e.g. a custom data source implementation) and then post more details about your report so that we can identify the cause.

 

HTH,

Lucian

[bogleg20]

Moving the setReadOnly(true) after the fill seems to have done the trick. Thanks Lucian! You saved me from myself. =)

 

Chris