151-java-performance-jmeter

name	151-java-performance-jmeter
description	Use when you need to set up JMeter performance testing for a Java project — including creating the run-jmeter.sh script from the exact template, configuring load tests with loops, threads, and ramp-up, or running performance tests from the project root with custom or default settings. This should trigger for requests such as Improve the code with JMeter performance testing; Apply JMeter performance testing; Refactor the code with JMeter performance testing; Add JMeter support. Part of cursor-rules-java project
license	Apache-2.0
metadata	{"author":"Juan Antonio Breña Moral","version":"0.16.0"}

Run performance tests based on JMeter

Provide a complete JMeter performance testing solution by creating the run-jmeter.sh script from the exact template, making it executable, and configuring the project structure for load testing. Supports custom loops, threads, ramp-up, and environment variable overrides.

What is covered in this Skill?

• Create run-jmeter.sh in project root from the exact template (no modifications)
• Project structure: src/test/resources/jmeter/load-test.jmx, target/ for results
• Script options: -l (loops), -t (threads), -r (ramp-up), -g (GUI), -h (help)
• Environment variables: JMETER_LOOPS, JMETER_THREADS, JMETER_RAMP_UP
• Verify JMeter is installed and available before proceeding

Scope: Copy the script template verbatim. Do not modify, interpret, or enhance the template content.

Constraints

JMeter must be installed and available in PATH. If not available, show a message and exit. Use only the exact template for the run-jmeter.sh script.

• PREREQUISITE: Verify JMeter is installed and accessible via jmeter --version before creating the script
• CRITICAL: Copy the run-jmeter.sh template exactly — do not modify, interpret, or enhance
• PERMISSION: Make the script executable with chmod +x run-jmeter.sh
• BEFORE APPLYING: Read the reference for the exact script template and usage instructions
• EDGE CASE: If request scope is ambiguous, stop and ask a clarifying question before applying changes
• EDGE CASE: If required inputs, files, or tooling are missing, report what is missing and ask whether to proceed with setup guidance

When to use this skill

• Improve the code with JMeter performance testing
• Apply JMeter performance testing
• Refactor the code with JMeter performance testing
• Add JMeter support

Workflow

1. Verify JMeter prerequisite

Check jmeter --version and stop with guidance if JMeter is not installed or not available in PATH.

2. Read JMeter reference template

Read references/151-java-performance-jmeter.md and use the run-jmeter.sh template exactly as provided.

3. Create script and project structure

Create run-jmeter.sh in project root, ensure required JMeter directories/files exist, and apply executable permission with chmod +x.

4. Explain usage and environment overrides

Document CLI options (-l, -t, -r, -g, -h) and environment variable overrides (JMETER_LOOPS, JMETER_THREADS, JMETER_RAMP_UP).

Reference

For detailed guidance, examples, and constraints, see references/151-java-performance-jmeter.md.