115 lines
2.8 KiB
Markdown
115 lines
2.8 KiB
Markdown
# Java Version Upgrade Task
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## Purpose
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Upgrade an existing Java application from an older version to Java 21. Handles dependency updates, code modernization, testing validation, and deployment for Java version migrations.
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## When to Use
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- Upgrading from Java 8, 11, or 17 to Java 21
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- Modernizing legacy Java applications
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- Improving application performance and security
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- Adopting new Java language features
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## Input Requirements
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- Current Java version and application details
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- Target Java version (Java 21 recommended)
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- Application dependencies and frameworks
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- Current build system configuration
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- Testing requirements
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- Deployment environment details
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## Process Steps
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### 1. Current State Analysis
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- Analyze current Java version and features used
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- Identify deprecated APIs and patterns
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- Assess code quality and technical debt
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- Evaluate framework compatibility
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- Review performance characteristics
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- Document current configuration
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### 2. Dependency Compatibility Check
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- Check all dependencies for Java 21 compatibility
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- Identify incompatible dependencies
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- Research alternative libraries
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- Plan dependency upgrade strategy
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- Update Maven/Gradle dependencies
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- Resolve dependency conflicts
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### 3. Code Modernization
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- Update code to use Java 21 features
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- Replace deprecated APIs
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- Implement modern Java patterns
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- Optimize performance with new features
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- Update exception handling
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- Improve code quality
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### 4. Build System Update
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- Update Maven/Gradle configuration
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- Update compiler plugin settings
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- Update build profiles
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- Update CI/CD pipeline configuration
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- Test build process
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- Validate build output
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### 5. Testing and Validation
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- Update test frameworks for Java 21
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- Run comprehensive test suite
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- Perform performance testing
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- Conduct security testing
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- Validate application functionality
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- Test deployment process
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### 6. Deployment Preparation
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- Update deployment scripts
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- Update container images
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- Update AWS infrastructure
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- Update monitoring configuration
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- Prepare rollback procedures
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- Plan deployment strategy
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## Output Deliverables
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- Java 21 compatible application
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- Updated dependencies and build configuration
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- Modernized code with Java 21 features
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- Comprehensive test results
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- Updated deployment configuration
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- Migration documentation
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## Success Criteria
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- Application successfully upgraded to Java 21
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- All dependencies updated and compatible
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- Code modernized with Java 21 features
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- All tests passing
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- Performance maintained or improved
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- Security vulnerabilities addressed
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- Application deployed successfully
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## Dependencies
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- Java 21 JDK installed
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- Updated build tools
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- Compatible IDE
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- Updated testing frameworks
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- AWS infrastructure access
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## Tools and Resources
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- Java 21 JDK
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- Maven/Gradle build tools
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- IDE with Java 21 support
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- Testing frameworks
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- Performance testing tools
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- Security scanning tools
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- AWS CLI and tools
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