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Saving AQL queries for use in Sirius model [message #1858928]

Tue, 02 May 2023 09:21

Jad El-khoury

Messages: 61
Registered: August 2015

Member

Is it possible to save AQL queries on a file somewhere, so that they can be called from within the Sirius odesign file?

In my odesign file, I call Acceleo queries saved in an MTL file. This allows me to reuse the same query from multiple locations in my design. This also makes the queries in the odesign file smaller, and easily readable.

I am trying to migrate these Acceleo queries to AQL, and would like to be able to do the same.

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Re: Saving AQL queries for use in Sirius model [message #1858986 is a reply to message #1858928]

Thu, 04 May 2023 06:35

Pierre-Charles David

Messages: 705
Registered: July 2009

Senior Member

Hi,

No that is not possible with AQL.
If you feel the need to reuse parts of your queries because they start to become too long or too complex, the recommended approach is to write a Java service method for these parts.
AQL was designed to make this really easy: just write a Java class with methods following a simple convention, and register the class (instead of your .mtl) in your odesign file.
See this part of the documentation for the details: https://www.eclipse.org/sirius/doc/specifier/general/Writing_Queries.html#service_methods

Regards,

Pierre-Charles David - Obeo

Need training or professional services for Sirius?
http://www.obeodesigner.com/sirius

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Re: Saving AQL queries for use in Sirius model [message #1858987 is a reply to message #1858986]

Thu, 04 May 2023 06:53

Jad El-khoury

Messages: 61
Registered: August 2015

Member

Hi

I see. I have used Java classes in other contexts. I discovered 2 limiations (or uncertainties) when using Java - which I hope I am wrong about. Am I wrong in my conclusions below?

1. from the odesign file, I can call the java service starting with "service:". But I cannot call the Java service from an AQL/Acceleo query (for example: aql: aqlLogic(someJavaMethod())).
2. Acceleo (and I assume AQL) queries are stateless, which means that multiple calls to the same query (with the same parameters) result in only 1 call - since the same input results in the same output. Does this also apply to Java calls?

regards
Jad

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