Connect to GraphQL Data from a Connection Pool in Jetty

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

   <Configure id='graphqldemo' class="org.eclipse.jetty.webapp.WebAppContext">
    <New id="graphqldemo" class="org.eclipse.jetty.plus.jndi.Resource">
    <Arg><Ref refid="graphqldemo"/></Arg>
    <Arg>jdbc/graphqldb</Arg>
    <Arg>
    <New class="cdata.jdbc.graphql.GraphQLDriver">
    <Set name="url">jdbc:graphql:</Set>
    <Set name="AuthScheme">Basic</Set>
    <Set name="User">username</Set>
    <Set name="Password">password</Set>
    <Set name="URL">https://mysite.com</Set>
    <Set name="InitiateOAuth">GETANDREFRESH</Set>
    </New>
    </Arg>
    </New>
   </Configure>
   

   You must specify the URL of the GraphQL service. The driver supports two types of authentication:

   • Set AuthScheme to Basic. You must specify the User and Password of the GraphQL service.
   • Take a look at the OAuth section in the Help documentation for detailed instructions.

4. Configure the resource in the Web.xml:

    jdbc/graphqldb
    javax.sql.DataSource
    Container
   
   

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

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

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.