Connect to Grafana Data from a Connection Pool in Jetty

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

   
   <Configure id='grafanademo' class="org.eclipse.jetty.webapp.WebAppContext">
       <New id="grafanademo" class="org.eclipse.jetty.plus.jndi.Resource">
       <Arg><Ref refid="grafanademo"/></Arg>
       <Arg>jdbc/grafanadb</Arg>
       <Arg>
         <New class="cdata.jdbc.api.APIDriver">
           <Set name="url">jdbc:api:</Set>
           <Set name="Profile">C:\profiles\Grafana.apip</Set>
           <Set name="ProfileSettings">'Token</Set>
           <Set name="Domain">your_grafana_domain'</Set>
         </New>
       </Arg>
     </New>
   </Configure>
   

   Start by setting the Profile connection property to the location of the Grafana Profile on disk (e.g. C:\profiles\Grafana.apip). Next, set the ProfileSettings connection property to the connection string for Grafana (see below).

   Grafana API Profile Settings

   In Grafana, navigate to Administration > Users and Access > Service accounts, create a service account, then click Add service account token to generate a token.

4. Configure the resource in the Web.xml:

   
     jdbc/grafanadb
     javax.sql.DataSource
     Container
   
   

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

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

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.