Replaced custom repository logic with Jakarta Data interfaces to reduce boilerplate and enhance compile-time query validation. Removed `AbstractRepository` and introduced `TransactionRunner` for consistent transactional support. Updated all repository facades to delegate query operations to generated interfaces while retaining the same API, ensuring backward compatibility. Added dependencies for `jakarta.data-api` and Hibernate's `hibernate-processor` for annotation-based query generation. Verified functional parity and improved testability across the repository layer.
Eliminated the static `JpaUtils` utility and transitioned to explicit repository management for improved modularity and testability. Updated `GuildService`, `TaskManagerImpl`, and related classes to use dependency-injected repositories. Simplified configuration by aligning repository definitions with existing service patterns and ensuring proper session handling through `SessionManager`. Verified that all affected components function as expected after refactoring.
Replaced Gson and org.json usage across the codebase with a unified Jackson-based implementation through a shared `Json` utility. Updated all JSON serialization and deserialization logic (`GsonJsonMapper`, HTTP client, task persistence, command handling, tests) to use Jackson's `ObjectMapper`. Removed the outdated dependencies from `pom.xml` and verified symmetry in payload serialization.
Replaced metadata-driven reflection with self-describing `PersistableTask` types and a new `PersistableTaskRegistry`. Removed `persistable-tasks.json` and `TaskRegistry`, migrating to type-safe DI instantiation and explicit `restore()` methods. Fixed task restoration issues, ensuring `EmojiReactionRoleTask` and its `emojiMapping` now persist and restore correctly. Introduced `typeId()` for stable task identification, updated payload serialization for symmetry, and applied database migration to map FQCNs to logical IDs. Added unit tests for robust type discovery, payload symmetry, and registry behavior, ensuring no breaking changes.
Replaced the bot's audio handling system by removing Lavaplayer dependencies and migrating to a Lavalink v4 node. Updated `MusicManager`, `TrackScheduler`, and related classes to utilize the `LavalinkClient`. Refactored playlist and track loading logic, task integrations, and event dispatch to integrate with the remote node. Deprecated the custom Udio source, preserving references for a future plugin port. Documented configuration and deployment details for the new audio architecture.
Replaced the existing HttpServer implementation and associated handler classes (`AbstractHandler`, `ActionHandler`, `GuildHandler`, `RootHandler`) with a Javalin-based routing system. Improved modularity by introducing `ActionRoutes` and `GuildRoutes` for route definitions, and centralized JSON mapping using `GsonJsonMapper`. Simplified caching via the new `ResponseCache` utility, updated `WebModule` for cleaner timeout handling, and extended test coverage for API endpoints.
Redesigned task lifecycle management to properly cascade parent-child removals and synchronize database persistence on task deletion. Refactored task management to address memory leaks, concurrency collisions, and pending-task cleanup issues. Enhanced lookup performance, logging accuracy, and test coverage with a comprehensive unit test suite validating all task scenarios.
Decomposed the monolithic `dispatch()` method into modular components using `CommandPrecondition`, `ResultHandler`, and `UsageValidator`. Replaced inline checks and tightly-coupled logic with composable, testable classes, eliminating `instanceof` dependencies. Preserved existing behavior and improved maintainability for future feature additions.
Replaced unbounded thread pools in `ThreadManager` with bounded `ThreadPoolExecutor` to prevent memory exhaustion under load. Refactored shutdown logic to handle exceptions per-executor, set threads to daemon mode in `BaseThreadFactory`, and aligned synchronization patterns across multiple classes (`TaskManagerImpl`, `ChannelMessagePurger`, and `MusicManager`). Addressed lock cleanup races, double unlock issues, and static collection thread-safety concerns.
Reworked `Settings` class to replace the static singleton pattern with constructor injection of `SettingsProvider`, improving testability and modularity. Updated all affected classes, tests, and configurations to align with the new architecture.
anthorob