Connect to Foursquare Data from a Connection Pool in Jetty

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

   
   <Configure id='foursquaredemo' class="org.eclipse.jetty.webapp.WebAppContext">
       <New id="foursquaredemo" class="org.eclipse.jetty.plus.jndi.Resource">
       <Arg><Ref refid="foursquaredemo"/></Arg>
       <Arg>jdbc/foursquaredb</Arg>
       <Arg>
         <New class="cdata.jdbc.api.APIDriver">
           <Set name="url">jdbc:api:</Set>
           <Set name="Profile">C:\profiles\Foursquare.apip</Set>
           <Set name="AuthScheme">APIKey</Set>
           <Set name="ProfileSettings">'APIKey</Set>
         </New>
       </Arg>
     </New>
   </Configure>
   

   Using API Key Authentication

   Foursquare Places API uses Service Key (Bearer token) authentication. To obtain a Service Key:

   1. Go to the Foursquare Developer Console at https://foursquare.com/developers/
   2. Create a new project or select an existing one
   3. Navigate to the API Keys section
   4. Generate a new Service Key for the Places API

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

   • AuthScheme: Set this to APIKey.
   • ServiceKey: Set this to your Foursquare Service Key obtained from the Developer Console.
   • XPlacesApiVersion: (Optional) Set this to the API version date. Defaults to 2025-06-17.

   Example APIKey connection string

   Profile=C:\profiles\Foursquare.apip;AuthScheme=APIKey;ProfileSettings='APIKey=your_personal_access_token';
   

4. Configure the resource in the Web.xml:

   
     jdbc/foursquaredb
     javax.sql.DataSource
     Container
   
   

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

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

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.