Do not spam exceptions when the database connection pool is closed

When some database access is still running asynchronously, it will
create an SQLException when the pool is closed (on shutdown). Just
silently ignore them in this case.

src/main/java/de/diddiz/LogBlock/CommandsHandler.java

@@ -426,10 +426,12 @@ public class CommandsHandler implements CommandExecutor {
                     rs.close();
                 }
             } catch (final SQLException ex) {
+                if (logblock.isCompletelyEnabled()) {
                     logblock.getLogger().log(Level.SEVERE, "[CommandsHandler] SQL exception on close", ex);
                 }
             }
         }
+    }
 
     public class CommandLookup extends AbstractCommand {
         public CommandLookup(CommandSender sender, QueryParams params, boolean async) throws Exception {
@@ -490,8 +492,10 @@ public class CommandsHandler implements CommandExecutor {
                     getSession(sender).lookupCache = null;
                 }
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[Lookup] " + params.getQuery() + ": ", ex);
+                }
             } finally {
                 close();
             }
@@ -546,8 +550,10 @@ public class CommandsHandler implements CommandExecutor {
                 writer.close();
                 sender.sendMessage(ChatColor.GREEN + "Wrote " + counter + " lines.");
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[WriteLogFile] " + params.getQuery() + " (file was " + file.getAbsolutePath() + "): ", ex);
+                }
             } finally {
                 close();
             }
@@ -606,8 +612,10 @@ public class CommandsHandler implements CommandExecutor {
                     sender.sendMessage(ChatColor.RED + "No block change found to teleport to");
                 }
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[Teleport] " + params.getQuery() + ": ", ex);
+                }
             } finally {
                 close();
             }
@@ -693,8 +701,10 @@ public class CommandsHandler implements CommandExecutor {
                     }
                 }
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[Rollback] " + params.getQuery() + ": ", ex);
+                }
             } finally {
                 close();
             }
@@ -766,8 +776,10 @@ public class CommandsHandler implements CommandExecutor {
                 editor.start();
                 sender.sendMessage(ChatColor.GREEN + "Redo finished successfully (" + editor.getElapsedTime() + " ms, " + editor.getSuccesses() + "/" + changes + " blocks" + (editor.getErrors() > 0 ? ", " + ChatColor.RED + editor.getErrors() + " errors" + ChatColor.GREEN : "") + (editor.getBlacklistCollisions() > 0 ? ", " + editor.getBlacklistCollisions() + " blacklist collisions" : "") + ")");
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[Redo] " + params.getQuery() + ": ", ex);
+                }
             } finally {
                 close();
             }
@@ -841,8 +853,10 @@ public class CommandsHandler implements CommandExecutor {
                     sender.sendMessage(ChatColor.GREEN + "Cleared out table " + table + "-chestdata. Deleted " + deleted + " entries.");
                 }
             } catch (final Exception ex) {
+                if (logblock.isCompletelyEnabled() || !(ex instanceof SQLException)) {
                     sender.sendMessage(ChatColor.RED + "Exception, check error log");
                     logblock.getLogger().log(Level.SEVERE, "[ClearLog] Exception: ", ex);
+                }
             } finally {
                 close();
             }

src/main/java/de/diddiz/LogBlock/LogBlock.java

@@ -40,11 +40,16 @@ public class LogBlock extends JavaPlugin {
     private boolean errorAtLoading = false, noDb = false, connected = true;
     private PlayerInfoLogging playerInfoLogging;
     private Questioner questioner;
+    private volatile boolean isCompletelyEnabled;
 
     public static LogBlock getInstance() {
         return logblock;
     }
 
+    public boolean isCompletelyEnabled() {
+        return isCompletelyEnabled;
+    }
+
     public Consumer getConsumer() {
         return consumer;
     }
@@ -120,7 +125,6 @@ public class LogBlock extends JavaPlugin {
         new DumpedLogImporter(this).run();
         registerEvents();
         consumer.start();
-        getServer().getScheduler().runTaskAsynchronously(this, new Updater.PlayerCountChecker(this));
         for (final Tool tool : toolsByType.values()) {
             if (pm.getPermission("logblock.tools." + tool.name) == null) {
                 final Permission perm = new Permission("logblock.tools." + tool.name, tool.permissionDefault);
@@ -128,6 +132,8 @@ public class LogBlock extends JavaPlugin {
             }
         }
         questioner = new Questioner(this);
+        isCompletelyEnabled = true;
+        getServer().getScheduler().runTaskAsynchronously(this, new Updater.PlayerCountChecker(this));
         try {
             Metrics metrics = new Metrics(this);
             metrics.start();
@@ -204,6 +210,7 @@ public class LogBlock extends JavaPlugin {
 
     @Override
     public void onDisable() {
+        isCompletelyEnabled = false;
         if (timer != null) {
             timer.cancel();
         }

src/main/java/de/diddiz/LogBlock/Updater.java

@@ -825,10 +825,12 @@ class Updater {
                 st.close();
                 conn.close();
             } catch (final SQLException ex) {
+                if (logblock.isCompletelyEnabled()) {
                     logblock.getLogger().log(Level.SEVERE, "[Updater] Error: ", ex);
                 }
             }
         }
+    }
 
     public static class MaterialUpdater1_13 {
         BlockData[][] blockDataMapping;