Connect to Lakebase Data from a Connection Pool in Jetty

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

   
   <Configure id='lakebasedemo' class="org.eclipse.jetty.webapp.WebAppContext">
       <New id="lakebasedemo" class="org.eclipse.jetty.plus.jndi.Resource">
       <Arg><Ref refid="lakebasedemo"/></Arg>
       <Arg>jdbc/lakebasedb</Arg>
       <Arg>
         <New class="cdata.jdbc.lakebase.LakebaseDriver">
           <Set name="url">jdbc:lakebase:</Set>
           <Set name="DatabricksInstance">lakebase</Set>
           <Set name="Server">127.0.0.1</Set>
           <Set name="Port">5432</Set>
           <Set name="Database">my_database</Set>
           <Set name="InitiateOAuth">GETANDREFRESH</Set>
         </New>
       </Arg>
     </New>
   </Configure>
   

   To connect to Databricks Lakebase, start by setting the following properties:
   • DatabricksInstance: The Databricks instance or server hostname, provided in the format instance-abcdef12-3456-7890-abcd-abcdef123456.database.cloud.databricks.com.
   • Server: The host name or IP address of the server hosting the Lakebase database.
   • Port (optional): The port of the server hosting the Lakebase database, set to 5432 by default.
   • Database (optional): The database to connect to after authenticating to the Lakebase Server, set to the authenticating user's default database by default.

   OAuth Client Authentication

   To authenicate using OAuth client credentials, you need to configure an OAuth client in your service principal. In short, you need to do the following:

   1. Create and configure a new service principal
   2. Assign permissions to the service principal
   3. Create an OAuth secret for the service principal

   For more information, refer to the Setting Up OAuthClient Authentication section in the Help documentation.

   OAuth PKCE Authentication

   To authenticate using the OAuth code type with PKCE (Proof Key for Code Exchange), set the following properties:

   • AuthScheme: OAuthPKCE.
   • User: The authenticating user's user ID.

   For more information, refer to the Help documentation.

4. Configure the resource in the Web.xml:

   
     jdbc/lakebasedb
     javax.sql.DataSource
     Container
   
   

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

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

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.