Connect to Everhour Data in JRuby

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

Configure a JDBC Connection to Everhour 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 Everhour\lib).

JRuby natively supports JDBC, so you can easily connect to Everhour 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 Everhour Profile on disk (e.g. C:\profiles\Everhour.apip). Next, set the ProfileSettings connection property to the connection string for Everhour (see below).

Everhour API Profile Settings

Obtain your API Key from your Everhour profile page (scroll to the bottom of the page).

Built-in Connection String Designer

For assistance in constructing the JDBC URL, use the connection string designer built into the Everhour 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 Everhour:

jdbc:api:Profile=C:\profiles\Everhour.apip;ProfileSettings='APIKey=your_api_token';

Create a JRuby App with Connectivity to Everhour 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 Everhour 2018/lib/cdata.jdbc.api.jar'

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

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

jruby -S APISelect.rb

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