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

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

Install the CData JDBC Driver for GitLab

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

Start a Spark Shell and Connect to GitLab Data

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

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

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

   GitLab API Profile Settings

   Create a Personal Access Token in GitLab under User Settings > Access Tokens, selecting the required scopes (e.g.,

   read_api

   ,

   api

   ).

   Built-in Connection String Designer

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

   scala> val api_df = spark.sqlContext.read.format("jdbc").option("url", "jdbc:api:Profile=C:\profiles\GitLab.apip;ProfileSettings='APIKey=your_personal_access_token';").option("dbtable","AccessRequests").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 GitLab data as a temporary table:

   scala> api_df.registerTable("accessrequests")

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

   scala> api_df.sqlContext.sql("SELECT Id, Username FROM AccessRequests WHERE State = pending").collect.foreach(println)

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

   

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