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Load Testing: Apache JMeter with Java Spring Boot

This document outlines how to implement load testing for a Java Spring Boot backend using Apache JMeter — the most widely adopted open-source load testing tool for JVM-based applications.

1. Why JMeter?​

  • Written in Java — native to Spring Boot ecosystem.
  • Rich GUI and CLI support.
  • Supports REST, SOAP, WebSockets, JDBC, JMS, etc.
  • Integration with Maven and CI/CD pipelines.
  • Extensive reporting capabilities.

2. Installation​

Via Homebrew (macOS):​

brew install jmeter

Manual Download:​

  1. Download from: https://jmeter.apache.org/download_jmeter.cgi
  2. Unzip and add bin/ to your system PATH.
load-tests/
├── test-plans/
│   └── booking-flow.jmx
├── results/
├── scripts/
│   └── prepare-db.sh
└── README.md

4. Writing a Test Plan​

Create test scenarios using the JMeter GUI (jmeter command), then export the .jmx plan.

Example use cases:

  • Booking a seat (POST /api/bookings)
  • Fetching available routes (GET /api/routes)
  • Login (POST /api/auth/login)

5. CLI Execution​

jmeter -n -t test-plans/booking-flow.jmx -l results/results.jtl -e -o results/report
  • -n: Non-GUI mode
  • -t: Test plan file
  • -l: Log results
  • -e -o: Generate HTML report in output folder

6. Integration with Maven​

Add the plugin:

<plugin>
  <groupId>com.lazerycode.jmeter</groupId>
  <artifactId>jmeter-maven-plugin</artifactId>
  <version>3.4.0</version>
  <executions>
    <execution>
      <goals>
        <goal>jmeter</goal>
      </goals>
    </execution>
  </executions>
</plugin>

Run tests via:

mvn verify

7. Best Practices​

  • Use CSV DataSet for dynamic data (e.g., credentials).
  • Add assertions to validate response codes and content.
  • Separate load vs stress vs endurance test plans.
  • Clean and reset DB with scripts before each run (for consistency).
  • Run with -Xms2G -Xmx4G JVM args for heavy loads.
  • Document Version: 1.0
  • Date: 2025-06-23
  • Author: ArturChernets