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Connect to MailChimp Data in JRuby

Create a simple JRuby app with access to live MailChimp data.

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

Configure a JDBC Connection to MailChimp 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 MailChimp\lib).

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

You can set the APIKey to the key you generate in your account settings, or, instead of providing your APIKey, you can use the OAuth standard to authenticate the application. OAuth can be used to enable other users to access their own data. To authenticate using OAuth, you will need to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL by registering an app with MailChimp.

See the "Getting Started" chapter in the help documentation for a guide to using OAuth.

Built-in Connection String Designer

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

java -jar cdata.jdbc.mailchimp.jar

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

Below is a typical JDBC connection string for MailChimp:

jdbc:mailchimp:APIKey=myAPIKey;

Create a JRuby App with Connectivity to MailChimp Data

Create a new Ruby file (for example: MailChimpSelect.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 MailChimp 2018/lib/cdata.jdbc.mailchimp.jar' url = "jdbc:mailchimp:APIKey=myAPIKey;" conn = java.sql.DriverManager.getConnection(url) stmt = conn.createStatement rs = stmt.executeQuery("SELECT Name, Stats_AvgSubRate FROM Lists") while (rs.next) do puts rs.getString(1) + ' ' + rs.getString(2) end

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

jruby -S MailChimpSelect.rb

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