Connect to XML Data from a Connection Pool in Jetty

The CData JDBC driver for XML is easy to integrate with Java Web applications. This article shows how to efficiently connect to XML data in Jetty by configuring the driver for connection pooling. You will configure a JNDI resource for XML in Jetty.

Configure the JDBC Driver for Salesforce as a JNDI Data Source

Follow the steps below to connect to Salesforce from Jetty.

1. Enable the JNDI module for your Jetty base. The following command enables JNDI from the command-line:

   
   java -jar ../start.jar --add-to-startd=jndi
   

2. Add the CData and license file, located in the lib subfolder of the installation directory, into the lib subfolder of the context path.

3. Declare the resource and its scope. Enter the required connection properties in the resource declaration. This example declares the XML data source at the level of the Web app, in WEB-INF\jetty-env.xml.

   
   
   <Configure id='xmldemo' class="org.eclipse.jetty.webapp.WebAppContext">
       <New id="xmldemo" class="org.eclipse.jetty.plus.jndi.Resource">
       <Arg><Ref refid="xmldemo"/></Arg>
       <Arg>jdbc/xmldb</Arg>
       <Arg>
         <New class="cdata.jdbc.xml.XMLDriver">
           <Set name="url">jdbc:xml:</Set>
           <Set name="URI">C:/people.xml</Set>
           <Set name="DataModel">Relational</Set>
         </New>
       </Arg>
     </New>
   </Configure>
   

   Connecting to Local or Cloud-Stored (Box, Google Drive, Amazon S3, SharePoint) XML Files

   CData Drivers let you work with XML files stored locally and stored in cloud storage services like Box, Amazon S3, Google Drive, or SharePoint, right where they are.

   Setting connection properties for local files

   Set the URI property to local folder path.

   Setting connection properties for files stored in Amazon S3

   To connect to XML file(s) within Amazon S3, set the URI property to the URI of the Bucket and Folder where the intended XML files exist. In addition, at least set these properties:

   • AWSAccessKey: AWS Access Key (username)
   • AWSSecretKey: AWS Secret Key

   Setting connection properties for files stored in Box

   To connect to XML file(s) within Box, set the URI property to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect to Box.

   Dropbox

   To connect to XML file(s) within Dropbox, set the URI proprerty to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect to Dropbox. Either User Account or Service Account can be used to authenticate.

   SharePoint Online (SOAP)

   To connect to XML file(s) within SharePoint with SOAP Schema, set the URI proprerty to the URI of the document library that includes the intended XML file. Set User, Password, and StorageBaseURL.

   SharePoint Online REST

   To connect to XML file(s) within SharePoint with REST Schema, set the URI proprerty to the URI of the document library that includes the intended XML file. StorageBaseURL is optional. If not set, the driver will use the root drive. OAuth is used to authenticate.

   Google Drive

   To connect to XML file(s) within Google Drive, set the URI property to the URI of the folder that includes the intended XML file(s). Use the OAuth authentication method to connect and set InitiateOAuth to GETANDREFRESH.

   The DataModel property is the controlling property over how your data is represented into tables and toggles the following basic configurations.

   • Document (default): Model a top-level, document view of your XML data. The data provider returns nested elements as aggregates of data.
   • FlattenedDocuments: Implicitly join nested documents and their parents into a single table.
   • Relational: Return individual, related tables from hierarchical data. The tables contain a primary key and a foreign key that links to the parent document.

   See the Modeling XML Data chapter for more information on configuring the relational representation. You will also find the sample data used in the following examples. The data includes entries for people, the cars they own, and various maintenance services performed on those cars.

4. Configure the resource in the Web.xml:

   
   
     jdbc/xmldb
     javax.sql.DataSource
     Container
   
   

5. You can then access XML with a lookup to java:comp/env/jdbc/xmldb:

   
   InitialContext ctx = new InitialContext();
   DataSource myxml = (DataSource)ctx.lookup("java:comp/env/jdbc/xmldb");
   

More Jetty Integration

The steps above show how to configure the driver in a simple connection pooling scenario. For more use cases and information, see the Working with Jetty JNDI chapter in the Jetty documentation.