Connect to Supabase Data in JRuby

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

Configure a JDBC Connection to Supabase 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 Supabase\lib).

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

Supabase API Profile Settings

Log into your Supabase account and navigate to Account Settings > Access Tokens to generate a new personal access token.

Built-in Connection String Designer

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

jdbc:api:Profile=C:\profiles\Supabase.apip;ProfileSettings='APIKey=your_api_key';

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

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

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

jruby -S APISelect.rb

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