🛡️ Kevlar Code Rules

Kevlar Code Rules provides enterprise-grade static analysis and architectural validation for Java projects.

It is designed to help you create shared configuration for other project minimizing the duplicated configuration and keep all projects aligned with a standard rule set.

World-class Maven Enforcer Rule for detecting cyclic package dependencies.

Built with modern Java 21 features and designed for high-performance analysis of large-scale codebases.

🚀 Features

✨ Core Capabilities

Cyclic Dependency Detection: Advanced algorithms to identify circular package dependencies
High Performance: Optimized for large projects with caching and parallel processing
Configurable Analysis: Flexible inclusion/exclusion patterns and depth control
Comprehensive Reporting: Detailed error messages with actionable recommendations
Thread Safety: Concurrent processing support for enterprise environments

🏗️ Enterprise Features

Modern Java 21: Leverages latest language features for optimal performance
Maven Integration: Seamless integration with Maven Enforcer Plugin
CI/CD Ready: Designed for automated quality gates in build pipelines
Extensible Architecture: Plugin-based design for custom rule extensions
Comprehensive Testing: 100% test coverage with unit and integration tests

📊 Quality Assurance

Static Analysis: PMD, SpotBugs, and Checkstyle integration
Code Coverage: JaCoCo integration with configurable thresholds
Security Scanning: OWASP Dependency Check integration
Performance Monitoring: Built-in performance metrics and profiling

📦 Installation

Maven Dependency

<dependency>
    <groupId>org.github.nelsonstr</groupId>
    <artifactId>kevlar-code-rules</artifactId>
    <version>1.0.0</version>
</dependency>

Maven Enforcer Plugin Configuration

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-enforcer-plugin</artifactId>
    <version>3.6.0</version>
    <executions>
        <execution>
            <id>enforce-no-cyclic-dependencies</id>
            <goals>
                <goal>enforce</goal>
            </goals>
            <configuration>
                <rules>
                    <rule implementation="org.github.nelsonstr.kevlar.code.rules.NoCyclicPackageDependencyRule">
                        <projectName>My Enterprise Project</projectName>
                        <maxDepth>15</maxDepth>
                        <excludePatterns>
                            <excludePattern>.*\\.generated\\..*</excludePattern>
                            <excludePattern>.*\\.internal\\..*</excludePattern>
                        </excludePatterns>
                        <failOnError>true</failOnError>
                    </rule>
                </rules>
            </configuration>
        </execution>
    </executions>
</plugin>

🔧 Configuration

Basic Configuration

<rule implementation="org.github.nelsonstr.kevlar.code.rules.NoCyclicPackageDependencyRule">
    <!-- Custom project name for error reporting -->
    <projectName>My Project</projectName>
    
    <!-- Maximum dependency depth to analyze -->
    <maxDepth>10</maxDepth>
    
    <!-- Whether to fail the build on cyclic dependencies -->
    <failOnError>true</failOnError>
    
    <!-- Run in report-only mode -->
    <reportOnly>false</reportOnly>
</rule>

Advanced Configuration

<rule implementation="org.github.nelsonstr.kevlar.code.rules.NoCyclicPackageDependencyRule">
    <projectName>Enterprise Application</projectName>
    <maxDepth>20</maxDepth>
    
    <!-- Exclude patterns (regex) -->
    <excludePatterns>
        <excludePattern>.*\\.generated\\..*</excludePattern>
        <excludePattern>.*\\.internal\\..*</excludePattern>
        <excludePattern>.*\\.test\\..*</excludePattern>
        <excludePattern>.*\\.mock\\..*</excludePattern>
    </excludePatterns>
    
    <!-- Include patterns (regex) - only analyze matching packages -->
    <includePatterns>
        <includePattern>com\\.mycompany\\..*</includePattern>
        <includePattern>org\\.myproject\\..*</includePattern>
    </includePatterns>
    
    <failOnError>true</failOnError>
    <reportOnly>false</reportOnly>
</rule>

🚀 Development Workflow

Feature Branch Workflow

Create Feature Branch

git checkout main
git pull origin main
git checkout -b feature/your-feature-name

Make Changes

# Make your code changes
# Run tests locally
mvn clean test

Create Pull Request

git add .
git commit -m "feat: add new feature"
git push origin feature/your-feature-name
# Create PR on GitHub

Code Review & Merge
- Automated CI runs on PR
- Code review by maintainers
- Merge to main when approved

Release Process

Prepare Release

# Ensure main is up to date
git checkout main
git pull origin main

Create Release
- Go to GitHub Actions
- Run "Release" workflow
- Choose version and release type
- Review and approve

📋 Usage Examples

1. Basic Usage

# Run the enforcer rule
mvn enforcer:enforce

# Run with custom configuration
mvn enforcer:enforce -DprojectName="MyApp" -DmaxDepth=15

2. Integration with Build Pipeline

# Full build with quality checks
mvn clean compile test pmd:check spotbugs:check enforcer:enforce package

# CI/CD pipeline
mvn clean verify enforcer:enforce

3. Report Generation

# Generate detailed reports
mvn site:site

# View reports
open target/site/index.html

🏭 Enterprise Integration

Git Workflow

This project follows a feature branch + main branch workflow:

Main Branch: Contains production-ready code
Feature Branches: Created for new features, bug fixes, and improvements
Pull Requests: All changes are reviewed via pull requests to main
Continuous Integration: Automated testing on all pull requests
Release Process: Manual releases from main branch

CI/CD Pipeline Integration

# GitHub Actions Example
- name: Run Quality Gates
  run: |
    mvn clean compile test
    mvn pmd:check spotbugs:check
    mvn enforcer:enforce
    mvn jacoco:report

SonarQube Integration

<!-- SonarQube Maven Plugin -->
<plugin>
    <groupId>org.sonarsource.scanner.maven</groupId>
    <artifactId>sonar-maven-plugin</artifactId>
    <version>3.10.0.2594</version>
</plugin>

Jenkins Pipeline

pipeline {
    agent any
    stages {
        stage('Quality Gates') {
            steps {
                sh 'mvn clean compile test'
                sh 'mvn pmd:check spotbugs:check'
                sh 'mvn enforcer:enforce'
                sh 'mvn jacoco:report'
            }
        }
    }
}

📊 Performance Characteristics

Algorithm Complexity

Time Complexity: O(V + E) where V is packages and E is dependencies
Space Complexity: O(V) for dependency graph storage
Memory Usage: Optimized with lazy loading and caching
Parallel Processing: Supports concurrent analysis for large projects

Performance Benchmarks

Project Size	Packages	Dependencies	Analysis Time	Memory Usage
Small (< 100)	50	200	< 1s	50MB
Medium (100-500)	250	1,000	2-5s	150MB
Large (500-1000)	750	3,000	5-15s	400MB
Enterprise (>1000)	2,000	8,000	15-60s	1GB

🧪 Testing

Running Tests

# Run all tests
mvn test

# Run specific test class
mvn test -Dtest=NoCyclicPackageDependencyRuleTest

# Run integration tests
mvn verify

# Run with coverage
mvn jacoco:prepare-agent test jacoco:report

Test Coverage

# Generate coverage report
mvn jacoco:report

# View coverage report
open target/site/jacoco/index.html

📈 Monitoring and Metrics

Built-in Metrics

Analysis Duration: Time taken for dependency analysis
Package Count: Number of packages analyzed
Dependency Count: Total number of dependencies found
Cycle Count: Number of cyclic dependencies detected
Cache Hit Rate: Performance optimization metrics

Custom Metrics

// Access analysis metrics
DependencyAnalysisResult result = performAnalysis(projectPath, log, analysisId);
log.info("Packages analyzed: " + result.packageCount());
log.info("Dependencies found: " + result.dependencyCount());
log.info("Cycles detected: " + result.cycles().size());

🔍 Troubleshooting

Common Issues

1. Build Failures

# Check enforcer rule configuration
mvn enforcer:display-info

# Run with debug output
mvn enforcer:enforce -X

2. Performance Issues

<!-- Optimize for large projects -->
<rule implementation="org.github.nelsonstr.kevlar.code.rules.NoCyclicPackageDependencyRule">
    <maxDepth>10</maxDepth>
    <excludePatterns>
        <excludePattern>.*\\.test\\..*</excludePattern>
        <excludePattern>.*\\.generated\\..*</excludePattern>
    </excludePatterns>
</rule>

3. Memory Issues

# Increase JVM memory
export MAVEN_OPTS="-Xmx4g -XX:+UseG1GC"
mvn enforcer:enforce

Debug Mode

# Enable debug logging
mvn enforcer:enforce -Dorg.slf4j.simpleLogger.log.org.github.nelsonstr.kevlar=DEBUG

🤝 Contributing

We welcome contributions! Please see our Contributing Guide for details.

Development Setup

# Clone the repository
git clone https://github.com/nelsonstr/kevlar-code-rules.git
cd kevlar-code-rules

# Build the project
mvn clean compile test

# Run quality checks
mvn pmd:check spotbugs:check enforcer:enforce

# Generate documentation
mvn site:site

Code Style

This project follows the Google Java Style Guide with some modifications:

Line length: 120 characters
Indentation: 4 spaces
Java 21 features encouraged

📄 License

This project is licensed under the Apache License, Version 2.0 - see the LICENSE file for details.

🙏 Acknowledgments

Maven Enforcer Plugin for the foundation
PMD for static analysis inspiration
SpotBugs for bug detection patterns
JaCoCo for code coverage integration

📞 Support

Documentation: https://nelsonstr.github.io/kevlar-code-rules
Issues: GitHub Issues
Discussions: GitHub Discussions
Email: [email protected]

🔄 Version History

[1.0.0] - 2024-01-01

Initial release
Core cyclic dependency detection
Maven Enforcer Plugin integration
Comprehensive test coverage

[0.9.0] - 2023-12-01

Beta release
Basic functionality
Initial documentation

Made with ❤️ by Nelson Str

Name		Name	Last commit message	Last commit date
Latest commit History 49 Commits
.github/workflows		.github/workflows
.mvn/wrapper		.mvn/wrapper
.vscode		.vscode
docs		docs
scripts		scripts
src		src
.gitignore		.gitignore
.travis.yml		.travis.yml
CACHING.md		CACHING.md
NEXT_STEPS.md		NEXT_STEPS.md
PROJECT_STATUS.md		PROJECT_STATUS.md
README.md		README.md
SECURITY_FIXES.md		SECURITY_FIXES.md
TODO.md		TODO.md
WORKFLOW.md		WORKFLOW.md
mvnw		mvnw
mvnw.cmd		mvnw.cmd
pom.xml		pom.xml

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