Some questions about BIRT and xml data

Rug Bot

Hello !<br />
first of all, thanks for all the informations I found in this forum, very useful.<br />
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I'm working on a web portal project and my job is integrating BIRT in a pdf generation service.<br />
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The main technologies are:<br />
Liferay, Hibernate, Spring and Ice Faces.<br />
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I already used a Pojo to do some tests and Birt work well.<br />
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I preparead an rptDesing associated to an xsd,<br />
i inject the xml data stream in context and Birt enginge produced the pdf.<br />
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All works but...<br />
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My service must respect an interface that I can't change: (actual version, possible changes in the future)<br />
byte[] generatePdf(long id, byte[] xmlData, byte[] xsdData, byte[] rptDesign);<br />
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Reading this post :<br />
<a class='bbc_url' href='http://www.birt-exchange.org/forum/deploying-integrating-birt-report-engine-applications/14367-xml-datasource-inputstream.html'>http://www.birt-exchange.org/forum/deploying-integrating-birt-report-engine-applications/14367-xml-datasource-inputstream.html</a><br />
<br />
and in particular this statement:<br />

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<br />
Please note that it is a dangerous way to do things. BIRT does not natively support InputStream. It's a property of the XML driver.<br />
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Please also note that BIRT will make a lot of calls to the input stream. You can expect to have only one call to get data, but no ! Depending on your report and the input stream you may have huge performance issues. Because it can be called many many many many times...<br />

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<br />
gave me some questions...<br />
<br />
<br />
- Is a good idea to inject xml stream in context? Alternatives?<br />
<br />
- Can I inject xsd too?<br />
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- if I generate more pdf's, I can change the xml data stream in the context without restarting the platform?<br />
<br />
- is a good idea to use BIRT with this constraints?<br />
<br />
- any one see problems for Spring integration?<br />
<br />
thanks for any help <br />
<br />
ruio

Rug Bot

I have partially solved my problems.

I'm using BIRT 2_5_2.

now i can dynamically change the stream of XMLdata to produce the same report with different data without restarting the platform.

in attachment you can find the source BirtManager.java.txt

my class have 3 methods:

startReportEngine();
shutdown();
createPDF(byte[] xmlData, InputStream reportDesign)

the tester class call one time startReportEngine, 5 times createPdf with different XMLData but de same reportDesign InputStream and finally call shutdown.

The first time work great, but from the second time at the line:
IReportRunnable design = reportEngine.openReportDesign(reportDesign);

i have an exception:
java.lang.NullPointerException

for the full stack trace see exception.txt

Any idea why?

Is possible to do that? (change dynamically .rptdesign)

The next step is do the same with the xsd referenced in the .rptdesign.

My objective is working without files, only streams (.xml,.xsd,.rptdesign).

All kind of help is appreciated.

Thanks

ruio