Connect to PowerShell Scripts in JRuby

Create a simple JRuby app with access to live PowerShell scripts.

JRuby is a high-performance, stable, fully threaded Java implementation of the Ruby programming language. The CData JDBC Driver for PowerShell makes it easy to integrate connectivity to live PowerShell scripts in JRuby. This article shows how to create a simple JRuby app that connects to PowerShell scripts, executes a query, and displays the results.

Configure a JDBC Connection to PowerShell Scripts

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 PowerShell\lib).

JRuby natively supports JDBC, so you can easily connect to PowerShell and execute SQL queries. Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.

The ScriptLocation, under the Data section, must be set to a valid script location.

Built-in Connection String Designer

For assistance in constructing the JDBC URL, use the connection string designer built into the PowerShell JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.powershell.jar

Fill in the connection properties and copy the connection string to the clipboard.

Below is a typical JDBC connection string for PowerShell:

jdbc:powershell:ScriptLocation='%Public%\Documents\CData PowerShell Scripts';ExecuteQuery=True;

Create a JRuby App with Connectivity to PowerShell Scripts

Create a new Ruby file (for example: PowerShellSelect.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 PowerShell 2018/lib/cdata.jdbc.powershell.jar' url = "jdbc:powershell:ScriptLocation='%Public%\Documents\CData PowerShell Scripts';ExecuteQuery=True;" conn = java.sql.DriverManager.getConnection(url) stmt = conn.createStatement rs = stmt.executeQuery("SELECT ProcessName, CPU FROM Process") while (rs.next) do puts rs.getString(1) + ' ' + rs.getString(2) end

With the file completed, you are ready to display your PowerShell scripts with JRuby. To do so, simply run your file from the command line:

jruby -S PowerShellSelect.rb

Writing SQL-92 queries to PowerShell allows you to quickly and easily incorporate PowerShell scripts into your own JRuby applications. Download a free trial today!