Connect to Hacker News Data from a Connection Pool in Jetty

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

   
   <Configure id='hackernewsdemo' class="org.eclipse.jetty.webapp.WebAppContext">
       <New id="hackernewsdemo" class="org.eclipse.jetty.plus.jndi.Resource">
       <Arg><Ref refid="hackernewsdemo"/></Arg>
       <Arg>jdbc/hackernewsdb</Arg>
       <Arg>
         <New class="cdata.jdbc.api.APIDriver">
           <Set name="url">jdbc:api:</Set>
           <Set name="Profile">C:\profiles\HackerNews.apip</Set>
           <Set name="AuthScheme">None</Set>
         </New>
       </Arg>
     </New>
   </Configure>
   

   Connecting to HackerNews

   The HackerNews API (powered by Firebase) is a public API that requires no authentication. You can connect and query data immediately without any credentials.

   After setting the following connection properties, you are ready to connect:

   • AuthScheme: Set this to None.

   Example connection string:

   Profile=C:\profiles\HackerNews.apip;AuthScheme=None
   

4. Configure the resource in the Web.xml:

   
     jdbc/hackernewsdb
     javax.sql.DataSource
     Container
   
   

5. You can then access Hacker News with a lookup to java:comp/env/jdbc/hackernewsdb:

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

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.