Are instances of JRFileVirtualizer reusable?

[abdon]

Is it safe (and thread-safe) to reuse an instance of JRFileVirtualizer (or any other JRVirtualizer implementation, for what is worth)?

In my code, I create a new instance every time I'm going to call some JasperFillManager's "fill" method. Could I use the same instance for every "fill" call?

[abdon]

Let me try to explain the situation

In my code, I create a JRFileVirtualizer evertime I'm going to fill a report, like this:

JRVirtualizer virtualizer = new JRFileVirtualizer(50,System.getProperty("java.io.tmpdir"))
Map parameters = new HashMap();
parameters.put(JRParameter.REPORT_VIRTUALIZER,virtualizer);
InputStream reportInputStream = ...
jasperPrint = JasperFillManager.fillReport(reportInputStream, parameters);

My question is, am I allowed to reuse the same virtualizer for other calls to JasperFillManager.fillReport? Like in:

JRVirtualizer virtualizer = this.virtualizer; //same instance every time!!
Map parameters = new HashMap();
parameters.put(JRParameter.REPORT_VIRTUALIZER,virtualizer);
InputStream reportInputStream = ...
jasperPrint = JasperFillManager.fillReport(reportInputStream, parameters);

Bruno Abdon

 

Post Edited by abdon at 05/08/2010 11:48

[lucianc]

That should work fine.  Just make sure that the virtualizer max page argument is bigger than the number of reports that will be using it.

HTH,

Lucian