This document details all GitHub workflows added to the Java Concurrency Patterns repository. These workflows provide comprehensive automation for dependency management, performance testing, quality assurance, and developer experience improvements.
Purpose: Automated dependency management and security vulnerability detection
Triggers:
- 🕐 Schedule: Every Monday at 9 AM UTC
- 🔧 Manual: workflow_dispatch
Jobs:
-
update-dependencies
- Checks for available dependency updates using Gradle
- Generates dependency update report
- Uploads report as artifact
- Creates GitHub step summary with results
-
security-audit
- Runs OWASP dependency check for known vulnerabilities
- Generates security audit report
- Continues on error to avoid breaking builds
- Uploads security report as artifact
Key Features:
- Non-breaking: Uses
continue-on-error: true - Artifact retention for historical tracking
- Clear summaries in GitHub UI
Purpose: Track performance metrics and compare different concurrency implementations
Triggers:
- 🚀 Push: Main branch changes to src/ or build files
- 🔀 Pull Request: Changes to src/ or build files
- 🕐 Schedule: Every Sunday at 2 AM UTC
- 🔧 Manual: With customizable benchmark duration
Jobs:
-
benchmark
- Creates and runs ConcurrencyBenchmark test
- Compares Virtual Threads vs Platform Threads performance
- Captures system information (CPU, memory, OS)
- Memory usage analysis with GC details
- 30-minute timeout for long-running benchmarks
- Comments results on PRs automatically
-
stress-test
- Runs all tests with increased load (4GB heap)
- 15-minute timeout
- Analyzes pass/fail rates
- Uploads stress test results
Key Features:
- PR comments with benchmark results
- System resource monitoring
- Performance regression detection
- Configurable benchmark duration via workflow_dispatch
Purpose: Fully automated release pipeline with validation and artifact generation
Triggers:
- 🏷️ Tags: Version tags matching
v*.*.*pattern - 🔧 Manual: With version, pre-release, and draft options
Jobs:
-
validate-release
- Validates version format (semantic versioning)
- Auto-detects pre-release from version string (alpha/beta/rc)
- Runs all tests
- Executes quality checks
- Generates test coverage
-
build-artifacts
- Updates version in build.gradle
- Builds JAR files (main, sources, javadoc)
- Creates distribution archives
- Packages examples separately
- Creates full source archive
-
generate-release-notes
- Auto-generates release notes from git history
- Categorizes changes (Features, Bug Fixes, Docs, Technical)
- Includes commit statistics
- Links to full changelog
-
create-release
- Creates GitHub release with all artifacts
- Uploads JAR files and archives
- Supports draft and pre-release flags
- Uses generated release notes
-
post-release
- Creates follow-up issue with post-release tasks
- Suggests next development version
Key Features:
- Semantic versioning validation
- Automated changelog generation
- Multiple artifact formats
- Post-release automation
Purpose: Automated documentation generation and GitHub Pages deployment
Triggers:
- 🚀 Push: Main branch changes to src/, docs/, or README
- 🔀 Pull Request: Documentation-related changes
- 🔧 Manual: workflow_dispatch
Jobs:
-
generate-javadoc
- Generates Javadoc with Gradle
- Creates beautiful HTML documentation site
- Includes pattern categorization
- Copies test coverage reports
- Deploys to GitHub Pages (main branch only)
- Creates pattern-specific documentation
-
validate-documentation
- Checks for Javadoc errors/warnings
- Calculates documentation coverage percentage
- Lists files missing documentation
- Comments results on PRs
-
check-links
- Validates all links in README.md
- Checks internal file references
- Verifies external URLs
- Uploads link check results
Key Features:
- GitHub Pages automatic deployment
- Documentation coverage metrics
- Link validation
- PR feedback comments
Purpose: Intelligent issue/PR automation and contributor experience enhancement
Triggers:
- 📋 Issues: opened, edited, labeled, unlabeled
- 🔀 Pull Requests: opened, edited, labeled, ready_for_review
- 💬 Comments: issue_comment created
- 🕐 Schedule: Daily at 12 PM UTC for stale checks
Jobs:
-
label-issues
- Auto-labels based on title/content keywords
- Detects: bug, enhancement, documentation, performance, etc.
- Adds priority labels for urgent/critical issues
- Welcome message for first-time contributors
-
label-pull-requests
- Auto-labels based on changes and PR content
- Size labels (small/medium/large) based on file count
- Detects breaking changes
- Welcome message for first-time PR contributors
-
check-pr-requirements
- Validates PR title length
- Checks for adequate description
- Looks for issue references
- Reminds about testing requirements
-
manage-stale-issues
- Marks issues/PRs stale after 60 days
- Auto-closes after 7 more days
- Exempts high-priority and pinned items
- Customizable stale messages
-
manage-labels
- Ensures all required labels exist
- Creates missing labels with proper colors
- Maintains consistent label taxonomy
Key Features:
- Intelligent content-based labeling
- New contributor onboarding
- Automated housekeeping
- Consistent label management
Purpose: Comprehensive PR analysis and quality feedback
Triggers:
- 🔀 Pull Requests: opened, synchronize, reopened, ready_for_review
- ✅ Reviews: submitted
Jobs:
-
validate-changes
- Analyzes all changed files
- Categorizes changes (Java/Test/Docs/Build)
- Validates test coverage for new code
- Runs code quality analysis (Checkstyle, PMD)
- Performance impact analysis
- Security analysis for potential issues
- Creates comprehensive PR analysis report
- Updates existing comments instead of creating new ones
-
check-breaking-changes
- Detects removed or modified public APIs
- Compares method signatures
- Alerts on potential breaking changes
- Only comments if issues found
Key Features:
- Comprehensive change analysis
- Test coverage validation
- Multi-dimensional quality checks
- Smart PR commenting (updates existing)
- Breaking change detection
All workflows include safety mechanisms:
- Non-breaking: Quality checks use
continue-on-error: true - Permissions: Minimal required permissions specified
- Timeouts: Appropriate timeouts to prevent hanging
- Draft PR support: Skip validation for draft PRs
- Error handling: Graceful failure with informative messages
The workflows work together to provide comprehensive automation:
- PRs trigger validation, benchmarks, and documentation checks
- Merges trigger documentation deployment and benchmarks
- Tags trigger the release pipeline
- Schedule maintains dependency updates and stale management
- Issues/PRs get automatic labeling and management
Each workflow supports customization:
- Manual triggers with parameters
- Configurable schedules
- Label exemptions
- Timeout adjustments
- Severity configurations
These workflows create a fully automated, developer-friendly CI/CD pipeline that maintains code quality without disrupting development flow.