Connect to Google Data Catalog Data from a Connection Pool in Jetty

The CData JDBC driver for Google Data Catalog is easy to integrate with Java Web applications. This article shows how to efficiently connect to Google Data Catalog data in Jetty by configuring the driver for connection pooling. You will configure a JNDI resource for Google Data Catalog 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 Google Data Catalog data source at the level of the Web app, in WEB-INF\jetty-env.xml.

   <Configure id='googledatacatalogdemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="googledatacatalogdemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="googledatacatalogdemo"/></Arg> <Arg>jdbc/googledatacatalogdb</Arg> <Arg> <New class="cdata.jdbc.googledatacatalog.GoogleDataCatalogDriver"> <Set name="url">jdbc:googledatacatalog:</Set> <Set name="ProjectId">YourProjectId</Set> <Set name="InitiateOAuth">GETANDREFRESH</Set> </New> </Arg> </New> </Configure>

   Google Data Catalog uses the OAuth authentication standard. Authorize access to Google APIs on behalf on individual users or on behalf of users in a domain.

   Before connecting, specify the following to identify the organization and project you would like to connect to:

   • OrganizationId: The ID associated with the Google Cloud Platform organization resource you would like to connect to. Find this by navigating to the cloud console.

     Click the project selection drop-down, and select your organization from the list. Then, click More -> Settings. The organization ID is displayed on this page.

   • ProjectId: The ID associated with the Google Cloud Platform project resource you would like to connect to.

     Find this by navigating to the cloud console dashboard and selecting your project from the Select from drop-down. The project ID will be present in the Project info card.

   When you connect, the OAuth endpoint opens in your default browser. Log in and grant permissions to the application to completes the OAuth process. For more information, refer to the OAuth section in the Help documentation.

4. Configure the resource in the Web.xml:

   jdbc/googledatacatalogdb javax.sql.DataSource Container

5. You can then access Google Data Catalog with a lookup to java:comp/env/jdbc/googledatacatalogdb: InitialContext ctx = new InitialContext(); DataSource mygoogledatacatalog = (DataSource)ctx.lookup("java:comp/env/jdbc/googledatacatalogdb");

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.