Servlet for Xindice

["Vladimir R. Bossicard" <vl...@bossicard.com>]

I'm currently debugging the XindiceServlet class (and it's NPE bug) to 
prepare Xindice 1.1.  The goal is to have a simple database browser (no 
update, just retrieve) servlet.

If you have already programmed such a servlet could you please send me 
the code so that I can speed up the development.

Thanks,

-Vladimir

-- 
Vladimir R. Bossicard
www.bossicard.com

Re: Servlet for Xindice

[Devrim Ergel <de...@parsera.com>]

Below is the function that we use to retrieve with xpath, no difference from
applications. I put it DBHelper class and all servlets use
the same function. For some servlets (if there is speed need) we use
collection pooling.

PS: Function transforms retrieved w3c elements to Dom4J

Devrim


    private static String driver =
"org.apache.xindice.client.xmldb.DatabaseImpl";
    private static String dbString = "xmldb:xindice://localhost:4080/db/";

    public static Vector load(String XPathQuery, String collection) throws
Exception{
        Collection col = null;
        DefaultElement defaultElement = null;
        Vector elementVector = new  Vector();
        // Does the record exist in the database
        try {
            Class c = Class.forName(driver);
            Database database = (Database) c.newInstance();
            DatabaseManager.registerDatabase(database);
            col = DatabaseManager.getCollection(dbString + collection);

            XPathQueryService service = (XPathQueryService)
col.getService("XPathQueryService", "1.0");
            ResourceSet resultSet = service.query(XPathQuery);
            ResourceIterator results = resultSet.getIterator();

            while (results.hasMoreResources()) {
                XMLResource res =  (XMLResource) results.nextResource();
                org.w3c.dom.Node node = res.getContentAsDOM();
                org.dom4j.Document doc = W3E2dom4jDocument(node);
                Element element = doc.getRootElement();
                elementVector.add(element);
            }
        }
        catch (XMLDBException e) {
            System.err.println("XML:DB Exception occured " + e.errorCode);
            return null;
        }
        finally {
            if (col != null)
                try {
                    col.close();
                }
                catch (XMLDBException e) {
                    System.err.println("XML:DB Exception occured " +
e.errorCode);
                    return null;
                }
            return elementVector;
        }
    }

----- Original Message -----
From: "Vladimir R. Bossicard" <vl...@bossicard.com>
To: "Xindice Users" <xi...@xml.apache.org>
Sent: Sunday, October 20, 2002 9:19 PM
Subject: Servlet for Xindice


> I'm currently debugging the XindiceServlet class (and it's NPE bug) to
> prepare Xindice 1.1.  The goal is to have a simple database browser (no
> update, just retrieve) servlet.
>
> If you have already programmed such a servlet could you please send me
> the code so that I can speed up the development.
>
> Thanks,
>
> -Vladimir
>
> --
> Vladimir R. Bossicard
> www.bossicard.com
>