Database connection sometimes times out and should be reconnected

[BrainStone]

Issue Description:

After a longer period of time the database connection times out. The plugin should try to reconnect.

What happens:

When the connection times out no database actions happen

What you expected to happen:

That the database connection gets reestablished

Steps to reproduce:

1. Start server with plugin
2. Wait a day
3. Login on server
4. Watch database requests fail

---

Affected Versions (Do not use "latest"):

• Minecraft: 1.11.2
• InvSync: 0.4.0-beta
• Sponge: 1.11.2-6.0.0-BETA-243

Your most recent log or stack trace file where the issue was present:

[17:03:55 ERROR] [invsync]: Could not save invetory for player KennyTheKing (2a095566-a563-4207-a747-846f171dd779)
java.sql.SQLException: execute() is called on closed connection
        at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.prolog(AbstractQueryProtocol.java:1239) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.prologProxy(AbstractQueryProtocol.java:1223) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at org.mariadb.jdbc.MariaDbServerPreparedStatement.executeQueryProlog(MariaDbServerPreparedStatement.java:332) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at org.mariadb.jdbc.MariaDbServerPreparedStatement.executeInternal(MariaDbServerPreparedStatement.java:390) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at org.mariadb.jdbc.MariaDbServerPreparedStatement.execute(MariaDbServerPreparedStatement.java:359) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at org.mariadb.jdbc.MariaDbServerPreparedStatement.executeUpdate(MariaDbServerPreparedStatement.java:348) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at com.zaxxer.hikari.pool.ProxyPreparedStatement.executeUpdate(ProxyPreparedStatement.java:61) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.executeUpdate(HikariProxyPreparedStatement.java) ~[2017-04-11-18-38-13-spongevanilla-1.11.2-6.0.0-BETA-243.jar:1.11.2-6.0.0-BETA-243]
        at world.jnc.invsync.DataSource.saveInventory(DataSource.java:94) [DataSource.class:?]
        at world.jnc.invsync.PlayerEvents.savePlayer(PlayerEvents.java:114) [PlayerEvents.class:?]
        at world.jnc.invsync.PlayerEvents.onPlayerLeave(PlayerEvents.java:53) [PlayerEvents.class:?]
        at org.spongepowered.common.event.listener.DisconnectListener_PlayerEvents_onPlayerLeave34.handle(Unknown Source) [?:?]
        at org.spongepowered.common.event.RegisteredListener.handle(RegisteredListener.java:95) [RegisteredListener.class:1.11.2-6.0.0-BETA-243]
        at org.spongepowered.common.event.SpongeEventManager.post(SpongeEventManager.java:305) [SpongeEventManager.class:1.11.2-6.0.0-BETA-243]
        at org.spongepowered.common.event.SpongeEventManager.post(SpongeEventManager.java:319) [SpongeEventManager.class:1.11.2-6.0.0-BETA-243]
        at org.spongepowered.common.SpongeImpl.postEvent(SpongeImpl.java:133) [SpongeImpl.class:1.11.2-6.0.0-BETA-243]
        at net.minecraft.network.NetHandlerPlayServer.redirect$onDisconnectHandler$zgk000(SourceFile:2002) [mi.class:?]
        at net.minecraft.network.NetHandlerPlayServer.func_147231_a(SourceFile:733) [mi.class:?]
        at net.minecraft.network.NetworkManager.func_179293_l(SourceFile:382) [er.class:?]
        at net.minecraft.network.NetworkSystem.func_151269_c(SourceFile:215) [mh.class:?]
        at net.minecraft.server.MinecraftServer.func_71190_q(SourceFile:1603) [MinecraftServer.class:?]
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(SourceFile:335) [lh.class:?]
        at net.minecraft.server.MinecraftServer.func_71217_p(SourceFile:562) [MinecraftServer.class:?]
        at net.minecraft.server.MinecraftServer.run(SourceFile:466) [MinecraftServer.class:?]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]

[BrainStone]

The method is not being called!