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Midas Wang

Subject: Want to execute a XQuery by API
Author: Midas Wang
Date: 13 Dec 2006 10:10 PM

I am using datadirect processor.
I want to execute a XQuery file by API like XQueryRunner.query(XQueryFilePath). But when there is RDB collections in the xquery, the datadirect API need a database configuration stream to initilize the connection.
Is there any method to generate such a configuration stream by program?

Thanks,
Midas

Minollo I.

Subject: Want to execute a XQuery by API
Author: Minollo I.
Date: 13 Dec 2006 10:22 PM

Take a look at the documentation:
http://media.datadirect.com/download/docs/ddxquery/ddxqug/conf_sourcefiles.html#wp182031

A simple example is:
...
DDXQDataSource ds = new DDXQDataSource();
ds.setProperty(com.ddtek.xquery.xqj.mediator.DDXQDataSource.JDBCURL, "jdbc:xquery:sqlserver://localhost:1433;databaseName=PortfolioData;user=sa;password=");
XQConnection connection = ds.getConnection();
XQExpression expression = connection.createExpression();
File xqueryFile = new File("c:/my.xquery");
XQSequence sequence = expression.executeQuery(new InputStreamReader(new FileInputStream(xqueryFile)));
...

Midas Wang

Subject: Want to execute a XQuery by API
Author: Midas Wang
Date: 13 Dec 2006 10:35 PM

Thank you, Ivan. You give me a method to do the DB connection.
Actually, I found such connection information in the XQuery metaInformation section. And when I generated Java code from this XQuery, I got a file like 'c_Scenario1.xml' which included some db connection information in another format.
I want to know is there any API provided to extract such a xml from the XQuery file?

Thanks,
Midas

Minollo I.

Subject: Want to execute a XQuery by API
Author: Minollo I.
Date: 13 Dec 2006 10:41 PM

There isn't an automated way to extract the connection information that Stylus Studio stores in the XQuery file as a comment. The general idea is that the information stored in the XQuery file is used at development time; and that at deployment time you use different ways to get the proper information, which is potentially different.

In theory you could parse that information yourself, but I would strongly discourage that approach.

Midas Wang

Subject: Want to execute a XQuery by API
Author: Midas Wang
Date: 13 Dec 2006 10:49 PM

Why do you discourage this way?
I want to use this way to store RDB connection information, also allow user to reset it in deployment.
Is there any problem with this method?

Thanks,
Midas

Minollo I.

Subject: Want to execute a XQuery by API
Author: Minollo I.
Date: 13 Dec 2006 10:56 PM

The problem is that the "meta-information" stored by Stylus Studio is an internal format that is not guaranteed to remain unchanged or backward compatible in future versions of the tool.

Midas Wang

Subject: Want to execute a XQuery by API
Author: Midas Wang
Date: 14 Dec 2006 12:12 AM

I see. Thank you!

Midas

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