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

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laforetbrut 0a88694166 Production hardening: fix all critical audit issues CRITICAL fixes: - C-1/C-2/C-4: Auto-save and logout now run on MAIN THREAD. All entity reads (inventory, curios, effects) were happening off-thread, causing duplication exploits (player interacts during save → items duplicated). Auto-save uses tryLock() to skip players already being saved. - C-5: NPE fix for non-RS2 items (null check on registry key lookup) - C-6: RS2 .dat file written atomically (temp file + rename) to prevent corruption of entire RS2 storage on crash mid-write HIGH fixes: - H-3: Deadlock prevention: lock released BEFORE latch.await() in doPlayerJoin. Prevents shutdown deadlock where background thread holds lock while waiting for main thread, and shutdown holds main thread while waiting for lock. - H-5: Curios cache now works WITHOUT keepInventory. Players who die then disconnect before respawning no longer lose curios data. - H-8: server_id SQL uses PreparedStatements instead of string concat MEDIUM fixes: - M-1: NumberFormatException in LocalJsonUtil caught per-entry instead of crashing entire map parse (prevents losing all cosmetic armor) Vyrriox		2026-03-26 18:14:31 +01:00
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docker-compose.yml	use volume for docker-compose db to persist data	2025-05-01 18:42:58 +00:00
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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