Connect to Elorus Data in JRuby

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

Configure a JDBC Connection to Elorus 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 Elorus\lib).

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

Start by setting the Profile connection property to the location of the Elorus Profile on disk (e.g. C:\profiles\Elorus.apip). Next, set the ProfileSettings connection property to the connection string for Elorus (see below).

Elorus API Profile Settings

Obtain your API Key from your User Profile in the top-right corner of Elorus. Find your Organization ID under Settings > Organization.

Built-in Connection String Designer

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

java -jar cdata.jdbc.api.jar

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

Below is a typical JDBC connection string for Elorus:

jdbc:api:Profile=C:\profiles\Elorus.apip;ProfileSettings='APIKey=your_api_key;OrganizationId=your_org_id';

Create a JRuby App with Connectivity to Elorus Data

Create a new Ruby file (for example: APISelect.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 Elorus 2018/lib/cdata.jdbc.api.jar'

url = "jdbc:api:Profile=C:\profiles\Elorus.apip;ProfileSettings='APIKey=your_api_key;OrganizationId=your_org_id';"
conn = java.sql.DriverManager.getConnection(url)
stmt = conn.createStatement
rs = stmt.executeQuery("SELECT BillId, Id FROM BillAttachments")
while (rs.next) do
  puts rs.getString(1) + ' ' + rs.getString(2)
end

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

jruby -S APISelect.rb

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