A Minecraft Forge mod that synchronizes player data across multiple servers using a MySQL backend.

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laforetbrut 5576d7f7e2 Add anti-duplication locks, shutdown save, and security hardening - Per-player ReentrantLock prevents concurrent save/restore operations, eliminating race conditions that could cause item duplication - Save ALL online players on ServerStoppingEvent (before disconnect) to prevent data loss from server shutdowns/restarts - Lock acquired before restore on join, released in finally block - Lock acquired before save on logout, cleaned up after completion - Verified compatibility with 430-mod Arcadia V2 modpack: - All item DataComponents from all mods preserved via BNBT serialization - Curios items (Artifacts, Elytra Slot, Charm of Undying, etc.) synced - Accessories items (Aether, Deep Aether) synced - Server-specific data (FTB Quests/Chunks, Waystones, Lootr) correctly NOT synced as intended Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>		2026-03-26 11:39:44 +01:00
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build.gradle	Add mod compatibility: Accessories (Aether), Cosmetic Armor, Apotheosis	2026-03-26 11:21:09 +01:00
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README.md

PlayerSync

PlayerSync is a Minecraft Forge mod that synchronizes player data across multiple servers using a MySQL backend. It allows players to maintain their inventory, equipment, experience, advancements, and more when moving between servers in a network.

Mod Support

Any other mods support is also possible.

Development Setup

Database Setup (Docker)

A docker-compose.yml file is provided for easily setting up a MariaDB database instance for development testing.

Make sure Docker is installed.
Inside your work directory run:
```
docker compose up -d
```
This will download the MariaDB image (if not already present) and start a database container in the background.
Stoppinng the Database
```
docker compose down
```

Data Persistence: The database uses a Docker volume, ensuring your data persists even if you stop and restart the containers.

Database Management Tool

The docker-compose.yml also includes an Adminer service, a lightweight database management tool.

Access Adminer in your web browser at http://localhost:8080.
Log in using the server with
- username: playersync
- database: playersync
- password: see docker-compose.yml

For debugging purposes, you can enable use_legacy_serialization to have readable database fields. This can cause crashes and unintended side-effects. Do not enable this on a production server if not absolutely necessary!

Running the Mod

The project uses Gradle for building and running. Use the provided Gradle wrapper (gradlew for Linux/macOS, gradlew.bat for Windows).

Make sure that the MySQL database you configured is running.
Run the Server
```
./gradlew runServer
```
or on Windows:
```
.\gradlew.bat runServer
```
This task compiles the mod and starts a dedicated Minecraft server instance with the mod loaded in the run directory.

Run the Client

./gradlew runClient

or on Windows:

.\gradlew.bat runClient