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Connect to Evernote Data in JRuby

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

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

Configure a JDBC Connection to Evernote 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 Evernote\lib).

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

Evernote uses the OAuth authentication standard. You can use the embedded OAuth application to connect without setting any connection properties. Alternatively, you can create an app to obtain the OAuthClientId, OAuthClientSecret, and CallbackURL connection properties. See the "Getting Started" chapter of 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 Evernote JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

java -jar cdata.jdbc.evernote.jar

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

Below is a typical JDBC connection string for Evernote:


Create a JRuby App with Connectivity to Evernote Data

Create a new Ruby file (for example: EvernoteSelect.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 Evernote 2018/lib/cdata.jdbc.evernote.jar' url = "jdbc:evernote:OAuthClientId=MyOAuthClientId;OAuthClientSecret=MyOAuthClientSecret;CallbackURL=http://localhost:33333;InitiateOAuth=GETANDREFRESH" conn = java.sql.DriverManager.getConnection(url) stmt = conn.createStatement rs = stmt.executeQuery("SELECT Title, Author FROM Notes") while ( do puts rs.getString(1) + ' ' + rs.getString(2) end

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

jruby -S EvernoteSelect.rb

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