Connect to Trello Data in JRuby

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

Configure a JDBC Connection to Trello 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 Trello\lib).

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

Trello uses token-based authentication to grant third-party applications access to their API. When a user has granted an application access to their data, the application is given a token that can be used to make requests to Trello's API.

Trello's API can be accessed in 2 different ways. The first is using Trello's own Authorization Route, and the second is using OAuth1.0.

• Authorization Route: At the moment of registration, Trello assigns an API key and Token to the account. See the Help documentation for information on how to connect via the Authorization route.
• OAuth Route: Similar to using Authorization, OAuth creates an Application Id and Secret when you create your account. See the Help documentation for information on how to to connect.

Built-in Connection String Designer

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

java -jar cdata.jdbc.trello.jar

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

Below is a typical JDBC connection string for Trello:

jdbc:trello:APIKey=myApiKey;Token=myGeneratedToken;InitiateOAuth=GETANDREFRESH;

Create a JRuby App with Connectivity to Trello Data

Create a new Ruby file (for example: TrelloSelect.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 Trello 2018/lib/cdata.jdbc.trello.jar'

url = "jdbc:trello:APIKey=myApiKey;Token=myGeneratedToken;InitiateOAuth=GETANDREFRESH;"
conn = java.sql.DriverManager.getConnection(url)
stmt = conn.createStatement
rs = stmt.executeQuery("SELECT BoardId, Name FROM Boards")
while (rs.next) do
 puts rs.getString(1) + ' ' + rs.getString(2)
end

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

jruby -S TrelloSelect.rb

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