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="URI">'C:/MyExcelWorkbooks/SampleWorkbook.xlsx'</Set>
    </New>
    </Arg>
    </New>
   </Configure>
   

   Connecting to Local or Cloud-Stored (Box, Google Drive, Amazon S3, SharePoint) Excel Files

   CData Drivers let you work with Excel files stored locally and stored in cloud storage services like Box, Amazon S3, Google Drive, or SharePoint, right where they are.

   Setting connection properties for local files

   Set the URI property to local folder path.

   Setting connection properties for files stored in Amazon S3

   To connect to Excel file(s) within Amazon S3, set the URI property to the URI of the Bucket and Folder where the intended Excel files exist. In addition, at least set these properties:

   • AWSAccessKey: AWS Access Key (username)
   • AWSSecretKey: AWS Secret Key

   Setting connection properties for files stored in Box

   To connect to Excel file(s) within Box, set the URI property to the URI of the folder that includes the intended Excel file(s). Use the OAuth authentication method to connect to Box.

   Dropbox

   To connect to Excel file(s) within Dropbox, set the URI proprerty to the URI of the folder that includes the intended Excel file(s). Use the OAuth authentication method to connect to Dropbox. Either User Account or Service Account can be used to authenticate.

   SharePoint Online (SOAP)

   To connect to Excel file(s) within SharePoint with SOAP Schema, set the URI proprerty to the URI of the document library that includes the intended Excel file. Set User, Password, and StorageBaseURL.

   SharePoint Online REST

   To connect to Excel file(s) within SharePoint with REST Schema, set the URI proprerty to the URI of the document library that includes the intended Excel file. StorageBaseURL is optional. If not set, the driver will use the root drive. OAuth is used to authenticate.

   Google Drive

   To connect to Excel file(s) within Google Drive, set the URI property to the URI of the folder that includes the intended Excel file(s). Use the OAuth authentication method to connect and set InitiateOAuth to GETANDREFRESH.

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.