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Connect to CSV Data from a Connection Pool in Jetty

The CSV JDBC Driver supports connection pooling: This article shows how to connect faster to CSV data from Web apps in Jetty.

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

    <Configure id='csvdemo' class="org.eclipse.jetty.webapp.WebAppContext"> <New id="csvdemo" class="org.eclipse.jetty.plus.jndi.Resource"> <Arg><Ref refid="csvdemo"/></Arg> <Arg>jdbc/csvdb</Arg> <Arg> <New class="cdata.jdbc.csv.CSVDriver"> <Set name="url">jdbc:csv:</Set> <Set name="DataSource">MyCSVFilesFolder</Set> </New> </Arg> </New> </Configure>

    The DataSource property must be set to a valid local folder name.

    Also, specify the IncludeFiles property to work with text files having extensions that differ from .csv, .tab, or .txt. Specify multiple file extensions in a comma-separated list. You can also set Extended Properties compatible with the Microsoft Jet OLE DB 4.0 driver. Alternatively, you can provide the format of text files in a Schema.ini file.

    Set UseRowNumbers to true if you are deleting or updating in CSV. This will create a new column with the name RowNumber which will be used as key for that table.

  4. Configure the resource in the Web.xml:

    jdbc/csvdb javax.sql.DataSource Container
  5. You can then access CSV with a lookup to java:comp/env/jdbc/csvdb: InitialContext ctx = new InitialContext(); DataSource mycsv = (DataSource)ctx.lookup("java:comp/env/jdbc/csvdb");

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.