Spark demo application

Spark 2.0.1 + Spring Boot application + Maven

Demonstrates how to start work with Spark and 2 key features of last:

• RDD
• Datasets (DataFrames)

What's inside?

SpringConfig - Spring configuration class, where Spark infrastructure beans are defined. SparkDemoRunner - Contains demo scenarios to run. WordCounterRDD - class to demonstrate work with RDD (JavaRDD). WordCounterDataset - class to demonstrate work with Dataset without predefined schema. FilmsProcessor - class demonstrates work with Dataset with predefined structure (JSON in this case). PropertiesHolder - class to demonstrate how to share configs on Spark nodes without use of broadcast.

How to run?

To run demo in standalone mode you don't need any additional installations. Just run main() method of Main class.

_NOTE: to see the spark logs change the logging level in SparkConf bean declaration in SpringConfig class. For ex:

    @Bean SparkConf sparkConf(){
        Logger.getLogger("org.apache").setLevel(Level.INFO);
        ...
    }