How to work with Mailjet 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 Mailjet, Spark can work with live Mailjet data. This article describes how to connect to and query Mailjet data from a Spark shell.

The CData JDBC Driver offers unmatched performance for interacting with live Mailjet data due to optimized data processing built into the driver. When you issue complex SQL queries to Mailjet, the driver pushes supported SQL operations, like filters and aggregations, directly to Mailjet 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 Mailjet data using native data types.

Install the CData JDBC Driver for Mailjet

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

Start a Spark Shell and Connect to Mailjet Data

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

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

2. With the shell running, you can connect to Mailjet 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 Mailjet Profile on disk (e.g. C:\profiles\Mailjet.apip). Next, set the ProfileSettings connection property to the connection string for Mailjet (see below).

   Mailjet API Profile Settings

   In your Mailjet account, navigate to My Account > REST API > API Key Management to obtain your API Key and API Secret.

   Built-in Connection String Designer

   For assistance in constructing the JDBC URL, use the connection string designer built into the Mailjet 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 Mailjet, using the connection string generated above.

   scala> val api_df = spark.sqlContext.read.format("jdbc").option("url", "jdbc:api:Profile=C:\profiles\Mailjet.apip;ProfileSettings='User=your_api_key;Password=your_api_secret';").option("dbtable","ApiKey").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 Mailjet data as a temporary table:

   scala> api_df.registerTable("apikey")

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

   scala> api_df.sqlContext.sql("SELECT ID, Name FROM ApiKey WHERE IsActive = true").collect.foreach(println)

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

   

Using the CData JDBC Driver for Mailjet in Apache Spark, you are able to perform fast and complex analytics on Mailjet 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.