Connect to Square Data from a Connection Pool in Jetty

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

   <Configure id='squaredemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="squaredemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="squaredemo"/></Arg> <Arg>jdbc/squaredb</Arg> <Arg> <New class="cdata.jdbc.square.SquareDriver"> <Set name="url">jdbc:square:</Set> <Set name="OAuthClientId">MyAppId</Set> <Set name="OAuthClientSecret">MyAppSecret</Set> <Set name="CallbackURL">http://localhost:33333</Set> <Set name="LocationId">MyDefaultLocation</Set> <Set name="InitiateOAuth">GETANDREFRESH</Set> </New> </Arg> </New> </Configure>

   Square uses the OAuth authentication standard. To authenticate using OAuth, you will need to register an app with Square to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL. See the "Getting Started" chapter of the help documentation for a guide to using OAuth.

   Additionally, you must specify the LocationId. You can retrieve the Ids for your Locations by querying the Locations table. Alternatively, you can set the LocationId in the search criteria of your query.

4. Configure the resource in the Web.xml:

   jdbc/squaredb javax.sql.DataSource Container

5. You can then access Square with a lookup to java:comp/env/jdbc/squaredb: InitialContext ctx = new InitialContext(); DataSource mysquare = (DataSource)ctx.lookup("java:comp/env/jdbc/squaredb");

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.