Birt and serialization

Hello,
I need some insight on how birt works. It has come to my attention that when using a scripted datasource, if i asign a java object to a row of my dataset, the object is serialized. I would like to avoid this serialization process as much as possible. What is the origin of this process? Is this the rhino library? Or can I avoid it by writing my own java event handlers?

Thanks

Find more posts tagged with

Comments

CBR

The object is serialized because of dataSet caching. I think it can be deactivated (have a look at javadoc of DataEngine: http://help.eclipse.org/helios/index.jsp?topic=/org.eclipse.birt.doc.isv/data/api/org/eclipse/birt/data/engine/api/package-summary.html) but i m not 100% sure.

Mad1s0n

Thanks for your reply. 
I read on the following bug report (<a class='bbc_url' href='https://bugs.eclipse.org/bugs/show_bug.cgi?id=364631'>bug</a>) that the 3.7.2 version of birt that has just been released would include a flag to disable dataset caching. I couldn't find it in the advanced properties of the dataset. Does anyone knows if it has effectively been implemented and where to find it?

CBR

Hi,

it is implemented in 3.7.2.
As mentioned you can find the property when selecting the corresponding dataset and click on the advanced tab in the properties editor.
I attach a screenshot that was made using BIRT 3.7.2 (the option is not available in previous versions)

CBR

Sorry forgot to add another sentence:
I m not quite sure if it solves your problem because BIRT sometimes decides to serializes data to disc depending on the data volumne of a single dataset (so that you don't run into out of memory issues on large datasets)

Mad1s0n

<blockquote class='ipsBlockquote' data-author="'cbrell'" data-cid="96905" data-time="1330432984" data-date="28 February 2012 - 05:43 AM">
Sorry forgot to add another sentence: 
I m not quite sure if it solves your problem because BIRT sometimes decides to serializes data to disc depending on the data volumne of a single dataset (so that you don't run into out of memory issues on large datasets) </blockquote>
 
Ok thanks for the reply. I saw the parameter on the previous versions, so I was not sure it was the one. I guess birt developers had the change in mind but had not implemented it yet. Can you confirm? 
 
Thanks anyway, i'll upgrade birt to the 3.7.2 version and test it.

Mad1s0n

Yep! It works, no more serialization! Thanks a lot.