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xml datasource as inputStream

RegisR

Hi,

I have a quick question about the BIRT 2.2.2 reportEngine.
I'm developping a batch application, which generate the XML datasource on the fly.
Of what I have seen, the report engine can only get an XML datasource from a "physical" source. I mean file or URL.
Is there a way to send the datasource as inputStream to the report engine ? Because I can have thousands of reports a day, it will be better than write the report to disk then read it from engine...

Thanks a lot!

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RegisR

Never mind...

Sorry for the inconvenience, I finally found the response by myself by looking at the ODA xml source code...
Here is a sample of code for those interested.

Map appContext = runAndRenderTask.getAppContext();
FileInputStream fileInputStream = new FileInputStream("D:/workspaces/birt/2.2.2/datasource/batch/reports/report.xml");
appContext.put("org.eclipse.datatools.enablement.oda.xml.inputStream", fileInputStream);
//Use closeInputStream (true) to let BIRT automatically close the inputStream.
appContext.put("org.eclipse.datatools.enablement.oda.xml.closeInputStream", "true");

RegisR

Hum, finally...
It's not resolved...

In case of the report contains 2 xml datasources... The 2 datasources will be bound on the same inputStream ! That's too bad...

Any idea to resolve this, please ?

Thanks !

vash

Hi,

Can you please tell me, from where did you get this package:
org.eclipse.datatools.enablement.oda.xml.inputStream

because its not available in the lib directory.

-Vash

RegisR

The package "org.eclipse.datatools.enablement.oda.xml.inputStream" does not exists (I think).

It is only a string to "register" a variable. But the driver is contained in the org.eclipse.datatools.enablement.oda.xml...jar
It's available in the plugins directory (sub folder of the lib one).
But only since BIRT 2.2 (BIRT 2.1 uses a custom ODA drivers).

vash

Thanks RegisR,

Got it.
Its in plugins.

-Vash

hearttaker

Hi,
I am relatively new to BIRT .

I'm trying to create a report design and then render the contents to an excel using BIRT 2.3

I have used an XML datasource which will take in a physical xml file at runtime and create a design. I am actually writing an xml object into a file (say abc.xml) at run time .
and set the xml file to the datasourcehandle as below :

dataSourceHandle.setProperty("FILELIST", xmlFilePath);

my question is , instead of using a physical file, is there a way to pass an xml object as a String/stream for creating the design ?

Thanks in Advance,
Hearttaker!!!

RegisR

Yes, just take the code above and replace the FileInputStream by a "whatever"InputStream.

Map appContext = runAndRenderTask.getAppContext();
SomethingInputStream inputStream = new SomethingInputStream (...);
appContext.put("org.eclipse.datatools.enablement.oda.xml.inputStream", inputStream);
//Use closeInputStream (true) to let BIRT automatically close the inputStream.
appContext.put("org.eclipse.datatools.enablement.oda.xml.closeInputStream", "true");

The only requirement is that the inputStream streams XML...

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.

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...

hearttaker

Thanks a ton RegisR !!!!

it worked

)))

Regards,
Hearttaker !!!

pkkoniec

How does one consume inputStream set with "org.eclipse.datatools.enablement.oda.xml.inputStream" in java code?
What datasource should be used and how to configure it to use inputStream in .rtpdesign?
In XML DataSource i have to provide file.xml, there is no option to use inputStream. Do I have to somehow override this file.xml with inputStream in beforeOpen?
I'd be very grateful for any advice.

pkkoniec

<blockquote class="ipsBlockquote" data-author="pkkoniec" data-cid="147449" data-time="1493206466">
<div>
How does one consume inputStream set with "org.eclipse.datatools.enablement.oda.xml.inputStream" in java code?
What datasource should be used and how to configure it to use inputStream in .rtpdesign?
In XML DataSource i have to provide file.xml, there is no option to use inputStream. Do I have to somehow override this file.xml with inputStream in beforeOpen?
I'd be very grateful for any advice.
</div>
</blockquote>
It turns out that file.xml is overridden by inputStream without any actions required.
If inputStream happens to be null, by default, file.xml is used