Example code for hands-on experience with Spark.

Example List#

Environment Setup#

Configure project environment for integrating Java/Spring Boot with Spark.

• Gradle dependency configuration
• SparkSession bean setup
• Considerations for Spring Boot and Spark integration
• Resolving logging conflicts

Basic Examples#

Basic examples utilizing Spark’s core features.

• Data loading (CSV, JSON, Parquet)
• Data transformation and filtering
• Aggregation and grouping
• Join operations
• SQL queries
• Real public dataset examples (NYC Taxi, Kaggle)

Monitoring Setup#

Monitoring configuration for stable operation of Spark applications in production environments.

• Spark UI / History Server setup
• Prometheus + Grafana integration
• Custom metrics implementation
• Structured logging (Log4j2, JSON)
• Alert configuration

Spring Boot Integration#

Spark and Spring Boot integration patterns for Java/Spring developers.

• SparkSession bean configuration and profile settings
• Service layer patterns (sync/async)
• REST API integration
• Integration testing
• Java vs Scala comparison

ETL Pipeline#

Complete ETL pipeline examples ready for production environments.

• Abstract ETL job class (Template Method pattern)
• Data cleaning utilities
• Incremental ETL (CDC, Upsert)
• Error handling and retry logic
• Spring scheduling integration

Before Running Examples#

Prerequisites#

• Java 17+
• Gradle 8.x or Maven 3.x
• IDE (IntelliJ IDEA, VS Code, etc.)

Common Gradle Setup#

plugins {
    id 'java'
    id 'org.springframework.boot' version '3.2.0'
    id 'io.spring.dependency-management' version '1.1.4'
}

java {
    sourceCompatibility = '17'
}

repositories {
    mavenCentral()
}

dependencies {
    // Spark
    implementation 'org.apache.spark:spark-core_2.13:3.5.1'
    implementation 'org.apache.spark:spark-sql_2.13:3.5.1'

    // Spring Boot (optional)
    implementation 'org.springframework.boot:spring-boot-starter'

    // Logging (conflict prevention)
    implementation 'org.slf4j:slf4j-simple:2.0.9'
}

configurations.all {
    exclude group: 'org.slf4j', module: 'slf4j-log4j12'
    exclude group: 'log4j', module: 'log4j'
}

Next Steps#

After completing the examples:

• Performance Tuning - Code optimization strategies
• Deployment - Production deployment
• Appendix - Glossary, FAQ