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Connect to xBase Data in JRuby
Create a simple JRuby app with access to live xBase data.
JRuby is a high-performance, stable, fully threaded Java implementation of the Ruby programming language. The CData JDBC Driver for xBase makes it easy to integrate connectivity to live xBase data in JRuby. This article shows how to create a simple JRuby app that connects to xBase data, executes a query, and displays the results.
Configure a JDBC Connection to xBase Data
Before creating the app, note the installation location for the JAR file for the JDBC Driver (typically C:\Program Files\CData\CData JDBC Driver for xBase\lib).
JRuby natively supports JDBC, so you can easily connect to xBase and execute SQL queries. Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.
The DataSource property must be set to the name of the folder that contains the .dbf files. Specify the IncludeFiles property to work with xBase table files having extensions that differ from .dbf. Specify multiple extensions in a comma-separated list.
Built-in Connection String Designer
For assistance in constructing the JDBC URL, use the connection string designer built into the xBase JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.
java -jar cdata.jdbc.xbase.jar
Fill in the connection properties and copy the connection string to the clipboard.
Below is a typical JDBC connection string for xBase:
jdbc:xbase:DataSource=MyDBFFilesFolder;
Create a JRuby App with Connectivity to xBase Data
Create a new Ruby file (for example: xBaseSelect.rb) and open it in a text editor. Copy the following code into your file:
require 'java'
require 'rubygems'
require 'C:/Program Files/CData/CData JDBC Driver for xBase 2018/lib/cdata.jdbc.xbase.jar'
url = "jdbc:xbase:DataSource=MyDBFFilesFolder;"
conn = java.sql.DriverManager.getConnection(url)
stmt = conn.createStatement
rs = stmt.executeQuery("SELECT Company, Total FROM Invoices")
while (rs.next) do
puts rs.getString(1) + ' ' + rs.getString(2)
end
With the file completed, you are ready to display your xBase data with JRuby. To do so, simply run your file from the command line:
jruby -S xBaseSelect.rb
Writing SQL-92 queries to xBase allows you to quickly and easily incorporate xBase data into your own JRuby applications. Download a free trial today!
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