Connect to Excel Data from a Connection Pool in Jetty

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

   <Configure id='exceldemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="exceldemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="exceldemo"/></Arg> <Arg>jdbc/exceldb</Arg> <Arg> <New class="cdata.jdbc.excel.ExcelDriver"> <Set name="url">jdbc:excel:</Set> <Set name="Excel File">'C:/MyExcelWorkbooks/SampleWorkbook.xlsx'</Set> </New> </Arg> </New> </Configure>

   The ExcelFile, under the Authentication section, must be set to a valid Excel File.

4. Configure the resource in the Web.xml:

   jdbc/exceldb javax.sql.DataSource Container

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

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.