XTransfer

Added

• Transactional file migration using a temporary staging directory to ensure all-or-nothing data transfer
• Non-blocking retry mechanism using ScheduledExecutorService with configurable delay between attempts
• Automatic rollback of backup files when the final atomic move operation fails
• Staging directory cleanup on transfer failure to prevent leftover temporary files
• FilePair helper class to encapsulate source, temporary destination, final destination, and critical/optional flag for each migrated file

Fixed

• Thread pool blocking caused by recursive copyWithRetry consuming worker threads during retry waits
• Data inconsistency when some files succeed and others fail during a single transfer operation (partial transfer no longer possible)
• Backup file not being created before the main data copy, risking loss of the target player's original data

Changed

• copyWithRetry now uses ScheduledExecutorService for delayed retries instead of recursive calls on the main executor pool
• copyFile now performs a single copy attempt and returns immediately, with retry logic handled externally
• transferPlayerData and related methods replaced by transferAllFiles, copyAllToTemp, and moveTempToTarget to support transactional migration
• Backup creation and optional file transfers (stats, advancements) integrated into the unified transactional pipeline
• ExecutorService renamed to executor for clarity; new scheduler field added for delayed retry scheduling

Removed

• Recursive retry logic (copyWithRetry calling itself with thenCompose) that blocked worker threads
• Separate backupIfNeeded, transferMainData, transferExtraData, and transferFile methods, consolidated into transferAllFiles and supporting methods
• Direct file overwrite approach that allowed partial transfer states

Added

• Added MAX_CACHE_SIZE (1000) limit to prevent memory overflow when loading usercache.json
• Added automatic cleanup task to remove stale player locks and access records every hour
• Added performance monitoring with loading time statistics in debug logs
• Added detailed debug logging for file operations, lock acquisition, and error conditions
• Added disk space check before backup operations

Changed

• Refactored data loading: Merged loadUserCache() and loadNameToUUIDs() into single loadPlayerData() method for better performance
• Improved lock management: Locks now track last access time and are automatically cleaned up
• Enhanced error handling: All exceptions now include detailed debug messages instead of being ignored
• Optimized file copying: Implemented atomic temp file operations with proper cleanup
• Restructured command handling: Unified transfer and transferuuid logic into single method
• Improved backup system: Added proper file existence checks and atomic operations
• Enhanced tab completion: Added offline player name suggestions with limits
• Better executor shutdown: Added timeout handling and forced termination if needed

Fixed

• Critical: Fixed recursive scheduling in startCleanupTask() that could cause stack overflow
• Critical: Removed dangerous offline UUID fallback that could match wrong players (UUID.nameUUIDFromBytes)
• Fixed scheduler parameter bug where null could be passed instead of plugin instance
• Fixed potential memory leak by properly removing locks on player quit
• Fixed file copy failure when parent directories don't exist
• Fixed race condition in task tracking set during concurrent operations
• Fixed incorrect stats file extension for older server versions (<1.13)
• Fixed potential deadlock by implementing consistent lock ordering
• Fixed missing message placeholders in several command responses

Removed

• Removed dangerous offline UUID generation (UUID.nameUUIDFromBytes)
• Removed redundant async parameter from Bukkit scheduler calls
• Removed duplicate data loading methods in favor of unified approach
• Removed empty catch blocks that silently ignored exceptions
• Removed unnecessary thread pool for simple operations

Added

• Folia server support with global region scheduler
• Async file copy operations with buffered streams
• User cache loading from usercache.json
• Name-to-UUID mapping system for offline player lookup
• Backup file creation with configurable suffix
• Disk space checking before file operations (50MB reserve)
• File copy retry mechanism (3 retries with 1 second delay)
• Atomic file operations using temporary files
• Memory leak prevention with automatic lock cleanup system
• Periodic cache cleanup task (runs every hour)
• Player quit event listener to remove unused locks
• Last access time tracking for lock management
• Version detection fallback for unknown server versions
• Multi-language support with message placeholders
• Stats and advancements transfer with version detection
• List command for player data with pagination
• Tab completion with online and offline player support
• Player kick option for online target players

Changed

• Migrated to CompletableFuture for reliable async operations
• Optimized concurrent map operations with atomic replacements
• Improved UUID parsing with better error handling and formatting
• Enhanced scheduler with automatic Folia/Bukkit detection
• Simplified logging system while keeping debug functionality
• Better resource cleanup in onDisable() with timeout handling
• Streamlined configuration loading with auto-fix
• More efficient name-to-UUID mapping updates
• Optimized file copy with proper buffer sizing (8KB)
• Improved lock acquisition with timeout and deadlock prevention

Fixed

• Potential memory leak from unclosed player locks
• Thread safety issues in cache loading (added synchronization)
• Disk space exhaustion crashes during file transfer
• Server version detection crashes with unusual formats
• Concurrent modification issues in map operations
• File copy failures due to cross-filesystem moves
• Backup file corruption from incomplete writes
• Tab completion NPE with null permissions
• UUID format inconsistencies in user input
• Player kick timing issues with async operations
• Configuration loading errors with missing keys
• Resource leaks in file streams (try-with-resources)
• Shutdown hangs from unfinished tasks

Removed

• Redundant constant classes (merged into simple constants)
• Excessive logging methods (consolidated into core ones)
• Overly detailed debug outputs (kept essential only)
• Unnecessary map clearing operations
• Duplicate code blocks in transfer handling
• Deprecated Bukkit API usages
• Legacy version color formatting (simplified version display)
• Redundant permission checks in tab completion

Nah, this is a big work, honestly. Not gonna give up of it.

Changed

• More stable and safe action!
• The code is shorter than the old one.
• The plugin runs faster.

Added

• Folia supported!

Changed

• Optimized the size of JAR.

Added

• Supports 1.8.x ~ 1.12.x now!

Added

• Full configuration system - Now with proper config.yml support
• Auto-config fixing - Missing config entries are automatically restored
• Beautiful console logo - ASCII art on startup (can be disabled in config)
• Colored version display - Alpha (red), Beta (gold), Release (green)
• Multi-language support - Messages fully customizable in config
• Player name tab completion - Tab completes online players and players with data files
• Kick online players option - Prevents data overwrite (configurable)
• Asynchronous file operations - No more server lag during transfers
• Backup system - Automatically creates .old files before overwriting
• /xtransfer reload command - Reload configuration without restart

Changed

• Version display format - Now matches XGamemode style (XTransfer V1.1-alpha)
• Command output - All messages now from config file
• UUID detection - Better handling of premium/offline players
• File copying - Using NIO for better performance

Fixed

• NullPointerException in loadMessages() - Messages map now properly initialized
• Null version in onDisable() - Added DISPLAY_VERSION for reliable shutdown
• Config corruption - Auto-fixes missing config values
• Online player data overwrite - Kicks player before transfer (optional)