Connect to SAS Data Sets Data from a Connection Pool in Jetty

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

   <Configure id='sasdatasetsdemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="sasdatasetsdemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="sasdatasetsdemo"/></Arg> <Arg>jdbc/sasdatasetsdb</Arg> <Arg> <New class="cdata.jdbc.sasdatasets.SASDataSetsDriver"> <Set name="url">jdbc:sasdatasets:</Set> <Set name="URI">C:/myfolder</Set> </New> </Arg> </New> </Configure>

   Set the following connection properties to connect to your SAS DataSet files:

   Connecting to Local Files

   • Set the Connection Type to "Local." Local files support SELECT, INSERT, and DELETE commands.
   • Set the URI to a folder containing SAS files, e.g. C:\PATH\TO\FOLDER\.

   Connecting to Cloud-Hosted SAS DataSet Files

   While the driver is capable of pulling data from SAS DataSet files hosted on a variety of cloud data stores, INSERT, UPDATE, and DELETE are not supported outside of local files in this driver.

   Set the Connection Type to the service hosting your SAS DataSet files. A unique prefix at the beginning of the URI connection property is used to identify the cloud data store and the remainder of the path is a relative path to the desired folder (one table per file) or single file (a single table). For more information, refer to the Getting Started section of the Help documentation.

4. Configure the resource in the Web.xml:

   jdbc/sasdatasetsdb javax.sql.DataSource Container

5. You can then access SAS Data Sets with a lookup to java:comp/env/jdbc/sasdatasetsdb: InitialContext ctx = new InitialContext(); DataSource mysasdatasets = (DataSource)ctx.lookup("java:comp/env/jdbc/sasdatasetsdb");

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.