Connect to Templated Data in JRuby

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

Configure a JDBC Connection to Templated 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 Templated\lib).

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

To authenticate to Templated, you will need an API key. You can obtain your API key from the Templated Dashboard under the API Key tab (app.templated.io > Dashboard > API Key).

Using API Key Authentication

After setting the following connection properties, you are ready to connect:

• AuthScheme: Set this to APIKey.
• APIKey: Set this to your Templated API key.

Example connection string:

Profile=C:\profiles\Templated.apip;AuthScheme=APIKey;ProfileSettings='APIKey=my_api_key';

Built-in Connection String Designer

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

jdbc:api:Profile=C:\profiles\Templated.apip;AuthScheme=APIKey;ProfileSettings='APIKey=my_api_key';

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

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

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

jruby -S APISelect.rb

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