SQLDatabaseManager optimizations, async profile loading -t00thpick1, zreed

This commit changes our shared connection into a connection pool utility to prevent
thread locks from multiple actions attempting to access the database at the same time.
In additon,  profile loading has been moved off the main thread at login time, to
allieviate the performance issues caused by it.

Fixes #2138, Fixes #2119, Fixes #1982, Fixes #1953

src/main/java/com/gmail/nossr50/database/DatabaseManager.java

@@ -73,7 +73,7 @@ public interface DatabaseManager {
     /**
      * Load a player from the database.
      *
-     * @deprecated replaced by {@link #loadPlayerProfile(UUID uuid, boolean createNew)}
+     * @deprecated replaced by {@link #loadPlayerProfile(String playerName, UUID uuid, boolean createNew)}
      *
      * @param playerName The name of the player to load from the database
      * @param createNew Whether to create a new record if the player is not
@@ -88,12 +88,9 @@ public interface DatabaseManager {
      * Load a player from the database.
      *
      * @param uuid The uuid of the player to load from the database
-     * @param createNew Whether to create a new record if the player is not
-     *          found
      * @return The player's data, or an unloaded PlayerProfile if not found
-     *          and createNew is false
      */
-    public PlayerProfile loadPlayerProfile(UUID uuid, boolean createNew);
+    public PlayerProfile loadPlayerProfile(UUID uuid);
 
     /**
      * Load a player from the database. Attempt to use uuid, fall back on playername
@@ -132,4 +129,9 @@ public interface DatabaseManager {
      * @return The type of database
      */
     public DatabaseType getDatabaseType();
+
+    /**
+     * Called when the plugin disables
+     */
+    public void onDisable();
 }