v1.4.0 — Minor Performance and Stability Issues Fixxed

Spawn v1.4.0 — Minor Performance and Stability Issues Fixxed

Performance Improvements

Sound Caching

• Sound lookups (Registry.SOUNDS + NamespacedKey parsing) are now cached in a
  ConcurrentHashMap<String, Optional<Sound>> via computeIfAbsent()
• Previously, every countdown tick per player triggered a full Registry lookup
• Invalid/empty sound names are also cached to avoid repeated parse attempts
• Cache is automatically cleared on /spawnreload

Display Name Caching

• Tab-completion display names are now cached in a volatile List<String>
  instead of re-sorting the entire map on every keystroke
• Cache is invalidated automatically on setSpawn() / deleteSpawn()

Stability Improvements

Async DB Error Handling

• dbExecutor.execute() tasks for save() and delete() are now wrapped in
  try-catch(Exception) with full stack trace logging via log.log(Level.SEVERE, ..., e)
• Previously, any RuntimeException thrown in async DB tasks was silently
  swallowed by the ExecutorService

Memory Leak Fixes

UpdateChecker Lifecycle Management

• HttpClient and ExecutorService converted from static fields to instance
  fields with proper shutdown() method
• shutdown() is called from SpawnPlugin.onDisable() before SpawnManager shutdown
• Fixes: ClassLoader/thread leak on plugin reload — static threads and
  HttpClient previously survived class unloading

Sound Cache Cleanup

• SoundUtil.clearCache() called on both /spawnreload and plugin disable

Code Safety

Abstract Read Methods in AbstractLocationManager

• exists(), getNames(), getDisplayNames(), getLocation(), getDisplayName()
  are now abstract instead of concrete DB-query implementations
• Forces subclasses to provide cache-backed implementations
• Prevents: Accidental synchronous DB access on main/region thread
  (MSPT spikes, Folia threading violations)

Files Changed

File	Change
SoundUtil.java	Added ConcurrentHashMap sound cache + clearCache()
UpdateChecker.java	Static → instance fields, added shutdown()
SpawnPlugin.java	Lifecycle management for UpdateChecker + SoundUtil
AbstractLocationManager.java	Read methods → abstract
SpawnManager.java	Async error handling + displayNames caching
ReloadCommand.java	Call SoundUtil.clearCache() on reload

Compatibility

• Folia-safe: All changes maintain thread safety
• Config: No config format changes — drop-in upgrade from v1.3.0