Connect to Redshift Data from a Connection Pool in Jetty

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

   <Configure id='redshiftdemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="redshiftdemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="redshiftdemo"/></Arg> <Arg>jdbc/redshiftdb</Arg> <Arg> <New class="cdata.jdbc.redshift.RedshiftDriver"> <Set name="url">jdbc:redshift:</Set> <Set name="User">admin</Set> <Set name="Password">admin</Set> <Set name="Database">dev</Set> <Set name="Server">examplecluster.my.us-west-2.redshift.amazonaws.com</Set> <Set name="Port">5439</Set> </New> </Arg> </New> </Configure>

   To connect to Redshift, set the following:

   • Server: Set this to the host name or IP address of the cluster hosting the Database you want to connect to.
   • Port: Set this to the port of the cluster.
   • Database: Set this to the name of the database. Or, leave this blank to use the default database of the authenticated user.
   • User: Set this to the username you want to use to authenticate to the Server.
   • Password: Set this to the password you want to use to authenticate to the Server.

   You can obtain the Server and Port values in the AWS Management Console:

   1. Open the Amazon Redshift console (http://console.aws.amazon.com/redshift).
   2. On the Clusters page, click the name of the cluster.
   3. On the Configuration tab for the cluster, copy the cluster URL from the connection strings displayed.

4. Configure the resource in the Web.xml:

   jdbc/redshiftdb javax.sql.DataSource Container

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

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.