How to work with Mailgun Data in Apache Spark using SQL

Apache Spark is a fast and general engine for large-scale data processing. When paired with the CData JDBC Driver for Mailgun, Spark can work with live Mailgun data. This article describes how to connect to and query Mailgun data from a Spark shell.

The CData JDBC Driver offers unmatched performance for interacting with live Mailgun data due to optimized data processing built into the driver. When you issue complex SQL queries to Mailgun, the driver pushes supported SQL operations, like filters and aggregations, directly to Mailgun and utilizes the embedded SQL engine to process unsupported operations (often SQL functions and JOIN operations) client-side. With built-in dynamic metadata querying, you can work with and analyze Mailgun data using native data types.

Install the CData JDBC Driver for Mailgun

Download the CData JDBC Driver for Mailgun installer, unzip the package, and run the JAR file to install the driver.

Start a Spark Shell and Connect to Mailgun Data

1. Open a terminal and start the Spark shell with the CData JDBC Driver for Mailgun JAR file as the jars parameter:

   $ spark-shell --jars /CData/CData JDBC Driver for Mailgun/lib/cdata.jdbc.api.jar
   

2. With the shell running, you can connect to Mailgun with a JDBC URL and use the SQL Context load() function to read a table.

   Start by setting the Profile connection property to the location of the Mailgun Profile on disk (e.g. C:\profiles\Mailgun.apip). Next, set the ProfileSettings connection property to the connection string for Mailgun (see below).

   Mailgun API Profile Settings

   Generate an API key in your Mailgun account by selecting Account Settings > API Security > Create Key from the account dropdown menu.

   Built-in Connection String Designer

   For assistance in constructing the JDBC URL, use the connection string designer built into the Mailgun 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.

   

   Configure the connection to Mailgun, using the connection string generated above.

   scala> val api_df = spark.sqlContext.read.format("jdbc").option("url", "jdbc:api:Profile=C:\profiles\Mailgun.apip;ProfileSettings='Password=your_api_key';").option("dbtable","Allowlists").option("driver","cdata.jdbc.api.APIDriver").load()
   

3. Once you connect and the data is loaded you will see the table schema displayed.

4. Register the Mailgun data as a temporary table:

   scala> api_df.registerTable("allowlists")

5. Perform custom SQL queries against the Data using commands like the one below:

   scala> api_df.sqlContext.sql("SELECT Type, Value FROM Allowlists WHERE CreatedAt = 2024-01-15T10:30:00Z").collect.foreach(println)

   You will see the results displayed in the console, similar to the following:

   

Using the CData JDBC Driver for Mailgun in Apache Spark, you are able to perform fast and complex analytics on Mailgun data, combining the power and utility of Spark with your data. Download a free, 30 day trial of any of the hundreds of CData JDBC Drivers and get started today.