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BIRT WITH JAXB

Shivani_T

Hello All, 
 
I have recently read one of the Performance improvement powerpoint (<a class='bbc_url' href='http://www.docstoc.com/docs/23236254/Designing-High-Performance-BIRT-Reports'>http://www.docstoc.com/docs/23236254/Designing-High-Performance-BIRT-Reports</a>) and as per that we can use the JAXB for BIRT to improve the performance 10 times. I am currently using latest version of the Birt 2.6.2. Also I am using Open source BIRT. Not commercial version of BIRT. 
 
I am very new to JAXB, also searched alot but did not found any information on JAXB with BIRT. As per my study and analysis, I created an XSD from rptdesign and Javaobjects, but not sure what will be ideal next steps. As my database will return me a resultset, normally BIRT api get that dataset and bind to the rptdesign file. As per the JAXB implementation I think now I need an XML to bind to the XSD so that I get the final XML report structure, if I do that then do I really need birt report? 
 
if you have experience in working with JAXB and BIRT then please suggest me some links or help me by shareing some steps or sample code. 
 
Thanks in advance for the help 
Shivani

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Comments

CBR

Hi,

it seems that you missunderstood the document you are refering. It says that if you are using XML as a datasource in your reports using the normal XML dataource (provided by BIRT) you should better switch to a custom JAXB solution.
To do that you should write a xsd for your data and create JAXB java objects. After that you should create a scripted data source using your JAXB java objects to get data out of your XML file.

The document says nothing about using JAXB to parse a report. I think that the BIRT engine uses a very optimized way to parse the report XML files using a parser that is a lot faster then JAXB.

Shivani_T

Hi cbrell,

Thank you so much for the response. Yes you are right. I understood it when I spoke to BIRT team, and came to know that the architecture of the Open source BIRT is very different from the Commercial version. Whereas the PPT which I have referred it was for the Commercial version of the BIRT. Commercial version is having iServer concept like any other Business intelligence tool, which most of the time have data returned in XML format. So that made me realize that this JAXB approach will help in that iserver based version not in the Open Source BIRT.

Still I was able to use the JAXB for open source report and could achieve a point where I can access the data through the java objects. But JAXB based jar file caused some issue in Open Source BIRT for which I will be creating a bug(ticket).

Thanks
Shivani