gradle: разделение на gradle-module's

tools/build.gradle

@@ -0,0 +1,41 @@
+import libs.LibsPlugin
+
+plugins {
+    id 'java'
+}
+
+apply plugin: LibsPlugin
+
+def publishScript = file(rootProject.getProjectDir().getPath() + '/publish.gradle')
+if (publishScript.exists()) {
+    apply from: publishScript.path
+}
+
+project.group = projectGroup
+project.version = moduleVersion
+jar.archiveBaseName.set(moduleName)
+
+repositories {
+    mavenLocal()
+    mavenCentral()
+    maven repos.mavenSpigotMC
+    maven repos.mavenDmxMcProject
+}
+
+dependencies {
+    compileOnly libs.lombok
+    annotationProcessor libs.lombok
+
+    compileOnly libs.bukkit
+    implementation libs.commons_text
+    implementation libs.refobj
+
+    testImplementation libs.test.junit5
+    testImplementation libs.test.mock
+    testImplementation libs.bukkit
+    testImplementation libs.test.h2db
+}
+
+test {
+    useJUnitPlatform()
+}

tools/gradle.properties

@@ -0,0 +1,2 @@
+moduleName=ghast-tools
+moduleVersion=1.11-SNAPSHOT

tools/src/main/java/ghast/BuildHelper.java

@@ -0,0 +1,36 @@
+package ghast;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockFace;
+import org.bukkit.block.Sign;
+import org.bukkit.block.Skull;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class BuildHelper {
+
+	public Skull placeSkull(Location location, BlockFace face) {
+		Block block = location.getWorld().getBlockAt(location);
+		block.setType(Material.SKULL);
+		Skull skull = (Skull) block.getState();
+		skull.setRotation(face);
+		org.bukkit.material.Skull skullMaterial = (org.bukkit.material.Skull) skull.getData();
+		skullMaterial.setFacingDirection(BlockFace.SELF);
+
+		return skull;
+	}
+
+	public Sign placeSignWall(Location location, BlockFace face) {
+		Block block = location.getWorld().getBlockAt(location);
+		block.setType(Material.WALL_SIGN);
+
+		Sign sign = (Sign) block.getState();
+		org.bukkit.material.Sign signMaterial = (org.bukkit.material.Sign) sign.getData();
+		signMaterial.setFacingDirection(face);
+
+		return sign;
+	}
+}

tools/src/main/java/ghast/EffectsHelper.java

@@ -0,0 +1,27 @@
+package ghast;
+
+import lombok.experimental.UtilityClass;
+import org.bukkit.Location;
+import org.bukkit.Particle;
+import org.bukkit.Sound;
+import org.bukkit.SoundCategory;
+import org.bukkit.util.Vector;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class EffectsHelper {
+
+	public void playSound(Location location, Sound sound, float pitch) {
+		location.getWorld().playSound(location, sound, SoundCategory.MASTER, 1.0f, pitch);
+	}
+
+	public void particle(Location location, Particle particle, double dx, double dy, double dz, double speed, int amount) {
+		location.getWorld().spawnParticle(particle, location, amount, dx, dy, dz, speed);
+	}
+
+	//TODO нужно проверить
+	public void particle(Location location, Particle particle, Vector vector, double speed, int amount) {
+		particle(location, particle, vector.getX(), vector.getY(), vector.getZ(), speed, amount);
+	}
+}
+

tools/src/main/java/ghast/EventContext.java

@@ -0,0 +1,71 @@
+package ghast;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import org.bukkit.Bukkit;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.Event;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.BooleanSupplier;
+import java.util.function.Consumer;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+@SuppressWarnings("unused")
+public class EventContext implements Listener {
+
+	private static final BooleanSupplier EMPTY_FILTER = () -> true;
+	private static final Consumer<Cancellable> CANCEL_EVENT = event -> event.setCancelled(true);
+
+	private final Map<Class<? extends Event>, Consumer<?>> eventMap = new HashMap<>();
+	private BooleanSupplier filter = EMPTY_FILTER;
+
+	public EventContext filter(BooleanSupplier filter) {
+		this.filter = (filter != null ? filter : EMPTY_FILTER);
+		return this;
+	}
+
+	public <T extends Event> EventContext onEvent(Class<T> eventType, EventPriority eventPriority, Consumer<T> consumer) {
+		if (consumer == null) {
+			eventMap.remove(eventType);
+		} else {
+			eventMap.put(eventType, consumer);
+			bukkitRegisterEvent(eventType, eventPriority);
+		}
+		return this;
+	}
+
+	public <T extends Event> EventContext onEvent(Class<T> eventType, Consumer<T> consumer) {
+		return onEvent(eventType, EventPriority.NORMAL, consumer);
+	}
+
+	public <T extends Event & Cancellable> EventContext cancelEvent(Class<T> eventType, EventPriority eventPriority) {
+		eventMap.put(eventType, CANCEL_EVENT);
+		bukkitRegisterEvent(eventType, eventPriority);
+		return this;
+	}
+
+	public <T extends Event & Cancellable> EventContext cancelEvent(Class<T> eventType) {
+		return cancelEvent(eventType, EventPriority.NORMAL);
+	}
+
+	private void bukkitRegisterEvent(Class<? extends Event> eventType, EventPriority eventPriority) {
+		Bukkit.getPluginManager().registerEvent(eventType, this, eventPriority,
+				this::eventExecute, GhastTools.getPlugin());
+	}
+
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	private void eventExecute(Listener listener, Event event) {
+		Consumer consumer = eventMap.get(event.getClass());
+		if (consumer != null && filter.getAsBoolean()) {
+			consumer.accept(event);
+		}
+	}
+
+	public static EventContext create() {
+		return new EventContext();
+	}
+}

tools/src/main/java/ghast/GhastTools.java

@@ -0,0 +1,57 @@
+package ghast;
+
+import ghast.assets.AssetsManager;
+import lombok.experimental.UtilityClass;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.plugin.Plugin;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.lang.ref.WeakReference;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class GhastTools {
+
+	private static WeakReference<Plugin> refPlugin;
+
+	@SuppressWarnings("java:S2696")
+	public void setPlugin(Plugin plugin) {
+		if (plugin == null) {
+			refPlugin = null;
+		} else {
+			refPlugin = new WeakReference<>(plugin);
+		}
+	}
+
+	@SuppressWarnings("java:S112")
+	public Plugin getPlugin() {
+		if (refPlugin == null) {
+			throw new RuntimeException("Plugin not set.");
+		}
+
+		Plugin plugin = refPlugin.get();
+		if (plugin == null) {
+			throw new RuntimeException("Plugin not set.");
+		}
+
+		return plugin;
+	}
+
+	@SuppressWarnings("java:S112")
+	public YamlConfiguration loadConfig(boolean saveDefault) {
+		if (saveDefault) {
+			getPlugin().saveDefaultConfig();
+		}
+
+		try (Reader reader = AssetsManager.getAsReader("config.yml", saveDefault)) {
+			return YamlConfiguration.loadConfiguration(reader);
+		} catch (IOException e) {
+			throw new RuntimeException("Error load config: " + e.getMessage(), e);
+		}
+	}
+
+	public YamlConfiguration loadConfig() {
+		return loadConfig(true);
+	}
+}

tools/src/main/java/ghast/I18n.java

@@ -0,0 +1,91 @@
+package ghast;
+
+import com.google.common.collect.HashBasedTable;
+import com.google.common.collect.Table;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import lombok.experimental.UtilityClass;
+import org.apache.commons.lang3.StringUtils;
+import org.apache.commons.text.StringSubstitutor;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.Reader;
+import java.util.HashMap;
+import java.util.Map;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class I18n {
+
+	private final String DEFAULT_LANG = "en";
+	private final Table<String/*Lang*/, String/*Key*/, String/*Template|Message*/> messagesMap = HashBasedTable.create();
+
+	//region Load messages
+	@SuppressWarnings("java:S112")
+	public void loadMessages(String lang, Reader reader) {
+		Map<String, String> map = messagesMap.row(lang.toLowerCase());
+
+		try {
+			BufferedReader bufferedReader = new BufferedReader(reader);
+			String line;
+			while ((line = bufferedReader.readLine()) != null) {
+				String[] split = line.split("=", 2);
+				map.put(split[0].trim().toLowerCase(), split[1].trim());
+			}
+		} catch (IOException e) {
+			throw new RuntimeException("Error load messages: " + e.getMessage(), e);
+		}
+	}
+
+	public void loadMessages(String lang, Map<String, String> messages) {
+		Map<String, String> map = messagesMap.row(lang.toLowerCase());
+		messages.forEach((k, v) -> map.put(k.toLowerCase(), v));
+	}
+
+	public void loadMessages(Reader reader) {
+		loadMessages(DEFAULT_LANG, reader);
+	}
+
+	public void loadMessages(Map<String, String> messages) {
+		loadMessages(DEFAULT_LANG, messages);
+	}
+	//endregion
+
+	//region Get message
+	public String get(String lang, String key) {
+		return messagesMap.row(lang.toLowerCase()).getOrDefault(key.toLowerCase(), StringUtils.EMPTY);
+	}
+
+	public String get(String lang, String key, Map<String, Object> params) {
+		return StringSubstitutor.replace(get(lang, key.toLowerCase()), params, "{", "}");
+	}
+
+	public String get(String key) {
+		return get(DEFAULT_LANG, key);
+	}
+
+	public String get(String key, Map<String, Object> params) {
+		return get(DEFAULT_LANG, key, params);
+	}
+	//endregion
+
+	public ParamBuilder paramBuilder() {
+		return new ParamBuilder();
+	}
+
+	@NoArgsConstructor(access = AccessLevel.PRIVATE)
+	public static class ParamBuilder {
+
+		private final Map<String, Object> params = new HashMap<>();
+
+		public ParamBuilder add(String key, Object value) {
+			params.put(key, value);
+			return this;
+		}
+
+		public Map<String, Object> build() {
+			return params;
+		}
+	}
+}

tools/src/main/java/ghast/XLog.java

@@ -0,0 +1,77 @@
+package ghast;
+
+import lombok.experimental.UtilityClass;
+
+import java.util.logging.Level;
+
+import static java.text.MessageFormat.format;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class XLog {
+
+	//region Debug
+	public void debug(String pattern, Object... objects) {
+		if (objects.length > 1 && objects[objects.length - 1] instanceof Throwable) {
+			Throwable throwable = (Throwable) objects[objects.length - 1];
+			Object[] values = new Object[objects.length - 1];
+			System.arraycopy(objects, 0, values, 0, values.length);
+
+			debug(format(pattern, values), throwable);
+		} else {
+			debug(format(pattern, objects));
+		}
+	}
+
+	public void debug(String message, Throwable throwable) {
+		GhastTools.getPlugin().getLogger().log(Level.FINE, message, throwable);
+	}
+
+	public void debug(String message) {
+		GhastTools.getPlugin().getLogger().fine(message);
+	}
+	//endregion
+
+	//region Info
+	public void info(String pattern, Object... objects) {
+		info(format(pattern, objects));
+	}
+
+	public void info(String message) {
+		GhastTools.getPlugin().getLogger().info(message);
+	}
+	//endregion
+
+	//region Warning
+	public void warn(String pattern, Object... objects) {
+		warn(format(pattern, objects));
+	}
+
+	public void warn(String message) {
+		GhastTools.getPlugin().getLogger().warning(message);
+	}
+	//endregion
+
+	//region Error
+	public void error(String pattern, Object... objects) {
+		if (objects.length > 1 && objects[objects.length - 1] instanceof Throwable) {
+			Throwable throwable = (Throwable) objects[objects.length - 1];
+			Object[] values = new Object[objects.length - 1];
+			System.arraycopy(objects, 0, values, 0, values.length);
+
+			error(format(pattern, values), throwable);
+		} else {
+			error(format(pattern, objects));
+		}
+	}
+
+	public void error(String message) {
+		GhastTools.getPlugin().getLogger().severe(message);
+	}
+
+	public void error(String message, Throwable throwable) {
+		GhastTools.getPlugin().getLogger().log(Level.SEVERE, message, throwable);
+	}
+	//endregion
+
+}

tools/src/main/java/ghast/assets/AssetsException.java

@@ -0,0 +1,13 @@
+package ghast.assets;
+
+public class AssetsException extends RuntimeException {
+
+	public AssetsException(String message) {
+		super(message);
+	}
+
+	public AssetsException(String message, Throwable cause) {
+		super(message, cause);
+	}
+}
+

tools/src/main/java/ghast/assets/AssetsManager.java

@@ -0,0 +1,163 @@
+package ghast.assets;
+
+import ghast.GhastTools;
+import lombok.experimental.UtilityClass;
+import org.bukkit.plugin.Plugin;
+
+import java.io.*;
+import java.net.URL;
+import java.nio.charset.Charset;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Scanner;
+
+import static java.text.MessageFormat.format;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class AssetsManager {
+
+	private static final String ERROR_NOT_FOUND = "Asset \"{0}\" not found";
+	private static final String ERROR_OPEN = "Error open asset \"{0}\": {1}";
+
+	//region getAsInputStream methods
+	public InputStream getAsInputStream(String resourceName, String defaultResourceName, boolean saveDefault) {
+		Plugin plugin = GhastTools.getPlugin();
+		InputStream inputStream;
+
+		Path pathToResource = plugin.getDataFolder().toPath().resolve(resourceName);
+		if (Files.exists(pathToResource)) {
+			inputStream = openResource(pathToResource);
+		} else if (defaultResourceName != null) {
+			URL resourceUrl = getResourceUrl(defaultResourceName);
+
+			if (saveDefault) {
+				doSaveTo(resourceUrl, pathToResource);
+				inputStream = openResource(pathToResource);
+			} else {
+				inputStream = openResource(resourceUrl);
+			}
+		} else {
+			throw new AssetsException(format(ERROR_NOT_FOUND, resourceName));
+		}
+
+		return inputStream;
+	}
+
+	public InputStream getAsInputStream(String resourceName, String defaultResourceName) {
+		return getAsInputStream(resourceName, defaultResourceName, true);
+	}
+
+	public InputStream getAsInputStream(String resourceName, boolean saveDefault) {
+		return getAsInputStream(resourceName, resourceName, saveDefault);
+	}
+
+	public InputStream getAsInputStream(String resourceName) {
+		return getAsInputStream(resourceName, resourceName, true);
+	}
+	//endregion
+
+	//region getAsReader methods
+	public Reader getAsReader(String resourceName, String defaultResourceName, boolean saveDefault) {
+		return new InputStreamReader(getAsInputStream(resourceName, defaultResourceName, saveDefault));
+	}
+
+	public Reader getAsReader(String resourceName, String defaultResourceName) {
+		return new InputStreamReader(getAsInputStream(resourceName, defaultResourceName, true));
+	}
+
+	public Reader getAsReader(String resourceName, boolean saveDefault) {
+		return new InputStreamReader(getAsInputStream(resourceName, resourceName, saveDefault));
+	}
+
+	public Reader getAsReader(String resourceName) {
+		return new InputStreamReader(getAsInputStream(resourceName, resourceName, true));
+	}
+	//endregion
+
+	//region getAsString methods
+	public String getAsString(String resourceName, String defaultResourceName, Charset charset, boolean saveDefault) {
+		try (InputStream inputStream = getAsInputStream(resourceName, defaultResourceName, saveDefault);
+			 Scanner scanner = new Scanner(inputStream, charset.name()).useDelimiter("\\A")) {
+
+			return scanner.next();
+		} catch (IOException e) {
+			throw new AssetsException(format(ERROR_OPEN, resourceName, e.getMessage()), e);
+		}
+	}
+
+	public String getAsString(String resourceName, String defaultResourceName, Charset charset) {
+		return getAsString(resourceName, defaultResourceName, charset, true);
+	}
+
+	public String getAsString(String resourceName, String defaultResourceName, boolean saveDefault) {
+		return getAsString(resourceName, defaultResourceName, StandardCharsets.UTF_8, saveDefault);
+	}
+
+	public String getAsString(String resourceName, String defaultResourceName) {
+		return getAsString(resourceName, defaultResourceName, StandardCharsets.UTF_8, true);
+	}
+
+	public String getAsString(String resourceName, Charset charset, boolean saveDefault) {
+		return getAsString(resourceName, resourceName, charset, saveDefault);
+	}
+
+	public String getAsString(String resourceName, Charset charset) {
+		return getAsString(resourceName, resourceName, charset, true);
+	}
+
+	public String getAsString(String resourceName, boolean saveDefault) {
+		return getAsString(resourceName, resourceName, StandardCharsets.UTF_8, saveDefault);
+	}
+
+	public String getAsString(String resourceName) {
+		return getAsString(resourceName, resourceName, StandardCharsets.UTF_8, true);
+	}
+	//endregion
+	
+	private URL getResourceUrl(String resourceName) {
+		URL resourceUrl = AssetsManager.class.getClassLoader().getResource(resourceName);
+		if (resourceUrl == null) {
+			throw new AssetsException(format(ERROR_NOT_FOUND, resourceName));
+		}
+
+		return resourceUrl;
+	}
+
+	private void doSaveTo(URL resourceUrl, Path saveToPath) {
+		try {
+			Files.createDirectories(saveToPath.getParent());
+
+			try (InputStream inputStream = resourceUrl.openStream();
+				 OutputStream outputStream = Files.newOutputStream(saveToPath)) {
+
+				byte[] buffer = new byte[8192];
+				int count;
+				while ((count = inputStream.read(buffer)) != -1) {
+					outputStream.write(buffer, 0, count);
+				}
+				outputStream.flush();
+			}
+		} catch (IOException e) {
+			throw new AssetsException(format("Error save asset \"{0}\" to \"{1}\": {2}",
+					resourceUrl, saveToPath, e.getMessage()), e);
+		}
+	}
+
+	private InputStream openResource(Path pathToResource) {
+		try {
+			return Files.newInputStream(pathToResource);
+		} catch (IOException e) {
+			throw new AssetsException(format(ERROR_OPEN, pathToResource, e.getMessage()), e);
+		}
+	}
+
+	private InputStream openResource(URL resourceUrl) {
+		try {
+			return resourceUrl.openStream();
+		} catch (IOException e) {
+			throw new AssetsException(format(ERROR_OPEN, resourceUrl, e.getMessage()), e);
+		}
+	}
+}

tools/src/main/java/ghast/command/CommandExecuter.java

@@ -0,0 +1,8 @@
+package ghast.command;
+
+import org.bukkit.command.CommandSender;
+
+public interface CommandExecuter {
+
+	void execute(CommandSender sender, String[] args);
+}

tools/src/main/java/ghast/command/CommandManager.java

@@ -0,0 +1,71 @@
+package ghast.command;
+
+import lombok.AccessLevel;
+import lombok.RequiredArgsConstructor;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import ru.dmitriymx.reflection.ReflectionObject;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class CommandManager {
+
+	public Builder create(String name) {
+		return new Builder(name);
+	}
+
+	public void register(String name, CommandExecuter executer) {
+		create(name).executer(executer).register();
+	}
+
+	@RequiredArgsConstructor(access = AccessLevel.PRIVATE)
+	public static class Builder {
+
+		private final String name;
+		private CommandExecuter executer;
+		private ErrorConsumer errorConsumer;
+		private Boolean onlyPlayer;
+		private String deniedMessage;
+
+		public Builder executer(CommandExecuter executer) {
+			this.executer = executer;
+			return this;
+		}
+
+		public Builder onError(ErrorConsumer errorConsumer) {
+			this.errorConsumer = errorConsumer;
+			return this;
+		}
+
+		public Builder useOnlyPlayer(String deniedMessage) {
+			this.onlyPlayer = true;
+			this.deniedMessage = deniedMessage;
+			return this;
+		}
+
+		public Builder useOnlyPlayer() {
+			return useOnlyPlayer(null);
+		}
+
+		public Builder useOnlyConsole(String deniedMessage) {
+			this.onlyPlayer = false;
+			this.deniedMessage = deniedMessage;
+			return this;
+		}
+
+		public Builder useOnlyConsole() {
+			return useOnlyConsole(null);
+		}
+
+		public void register() {
+			//TODO для Paper такие "извращения" не требуются. Нужно продумать.
+			new ReflectionObject(Bukkit.getServer())
+					.method("getCommandMap").invoke()
+					.method("register", String.class, Command.class).invoke(
+						name, new CommandWrapper(name, this.onlyPlayer, this.deniedMessage,
+							this.executer, this.errorConsumer)
+					);
+		}
+	}
+}

tools/src/main/java/ghast/command/CommandWrapper.java

@@ -0,0 +1,71 @@
+package ghast.command;
+
+import ghast.XLog;
+import org.bukkit.ChatColor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.defaults.BukkitCommand;
+import org.bukkit.entity.Player;
+
+class CommandWrapper extends BukkitCommand {
+
+	private static final String DEFAULT_DENIED_MESSAGE_PLAYERS = ChatColor.RED + "This command use only players";
+	private static final String DEFAULT_DENIED_MESSAGE_CONSOLE = ChatColor.RED + "This command use only in console";
+
+	private static final ErrorConsumer DEFAULT_ERROR_CONSUMER =
+			(sender, commandName, args, exception) -> {
+				sender.sendMessage(String.format("%sError execute command '%s'!", ChatColor.RED, commandName));
+				XLog.error("Error execute command ''{0}'' with args ''{1}''",
+						commandName, String.join(" ", args), exception);
+			};
+
+	private final CommandExecuter executer;
+	private final ErrorConsumer errorConsumer;
+	private final Boolean onlyPlayer;
+	private String deniedMessage;
+
+	protected CommandWrapper(String name, Boolean onlyPlayer, String deniedMessage,
+			CommandExecuter executer, ErrorConsumer errorConsumer) {
+		super(name);
+		this.onlyPlayer = onlyPlayer;
+		this.executer = executer;
+
+		if (onlyPlayer != null) {
+			if (deniedMessage == null) {
+				this.deniedMessage = Boolean.TRUE.equals(onlyPlayer) ? DEFAULT_DENIED_MESSAGE_PLAYERS
+						: DEFAULT_DENIED_MESSAGE_CONSOLE;
+			} else {
+				this.deniedMessage = deniedMessage;
+			}
+		}
+
+		if(errorConsumer == null) {
+			this.errorConsumer = DEFAULT_ERROR_CONSUMER;
+		} else {
+			this.errorConsumer = errorConsumer;
+		}
+	}
+
+	@Override
+	@SuppressWarnings("java:S1066")
+	public boolean execute(CommandSender commandSender, String commandName, String[] args) {
+		if (Boolean.TRUE.equals(onlyPlayer)) {
+			if (!(commandSender instanceof Player)) {
+				commandSender.sendMessage(deniedMessage);
+				return true;
+			}
+		} else if (Boolean.FALSE.equals(onlyPlayer)) { // use console only
+			if (commandSender instanceof Player) {
+				commandSender.sendMessage(deniedMessage);
+				return true;
+			}
+		}
+
+		try {
+			executer.execute(commandSender, args);
+			return true;
+		} catch (Exception e) {
+			errorConsumer.accept(commandSender, commandName, args, e);
+			return false;
+		}
+	}
+}

tools/src/main/java/ghast/command/ErrorConsumer.java

@@ -0,0 +1,8 @@
+package ghast.command;
+
+import org.bukkit.command.CommandSender;
+
+public interface ErrorConsumer {
+
+	void accept(CommandSender sender, String commandName, String[] args, Exception exception);
+}

tools/src/main/java/ghast/database/CannotGetJdbcConnectionException.java

@@ -0,0 +1,10 @@
+package ghast.database;
+
+import java.sql.SQLException;
+
+public class CannotGetJdbcConnectionException extends DataAccessException {
+
+	public CannotGetJdbcConnectionException(String msg, SQLException ex) {
+		super(msg, ex);
+	}
+}

tools/src/main/java/ghast/database/DataAccessException.java

@@ -0,0 +1,19 @@
+package ghast.database;
+
+import lombok.Getter;
+
+@SuppressWarnings("java:S1165")
+@Getter
+public class DataAccessException extends RuntimeException {
+
+	private String sql;
+
+	public DataAccessException(String msg, Throwable cause) {
+		super(msg, cause);
+	}
+
+	public DataAccessException(String msg, String sql, Throwable cause) {
+		this(msg, cause);
+		this.sql = sql;
+	}
+}

tools/src/main/java/ghast/database/JdbcOperations.java

@@ -0,0 +1,22 @@
+package ghast.database;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+public interface JdbcOperations {
+
+	void execute(String sql) throws DataAccessException;
+
+	<T> T query(String sql, ResultSetExtractor<T> rse) throws DataAccessException;
+
+	<T> Optional<T> queryOne(String sql, ResultSetExtractor<T> rse) throws DataAccessException;
+
+	<T> List<T> queryList(String sql, RowMapper<T> rowMapper) throws DataAccessException;
+
+	Map<String, Object> queryForMap(String sql) throws DataAccessException;
+
+	List<Map<String, Object>> queryForMapList(String sql) throws DataAccessException;
+
+	int update(String sql) throws DataAccessException;
+}

tools/src/main/java/ghast/database/JdbcTemplate.java

@@ -0,0 +1,244 @@
+package ghast.database;
+
+import ghast.XLog;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+
+import javax.sql.DataSource;
+import java.sql.Date;
+import java.sql.*;
+import java.util.*;
+
+@NoArgsConstructor
+@Getter
+@Setter
+public class JdbcTemplate implements JdbcOperations {
+
+	private static final String DBG_SQL_INFO = "Execute SQL: {0}";
+	private DataSource dataSource;
+
+	public JdbcTemplate(DataSource dataSource) {
+		setDataSource(dataSource);
+	}
+
+	@Override
+	public void execute(String sql) throws DataAccessException {
+		XLog.debug(DBG_SQL_INFO, sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		try {
+			statement = connection.createStatement();
+			statement.execute(sql);
+		} catch (SQLException e) {
+			throw new DataAccessException("Error execute SQL", sql, e);
+		} finally {
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	@Override
+	public <T> T query(String sql, ResultSetExtractor<T> rse) throws DataAccessException {
+		XLog.debug(DBG_SQL_INFO, sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		ResultSet resultSet = null;
+		try {
+			statement = connection.createStatement();
+			resultSet = statement.executeQuery(sql);
+			return rse.extractData(resultSet);
+		} catch (SQLException e) {
+			throw new DataAccessException("Error execute SQL", sql, e);
+		} finally {
+			closeResultSet(resultSet);
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	@Override
+	public <T> Optional<T> queryOne(String sql, ResultSetExtractor<T> rse) throws DataAccessException {
+		return query(sql, rs -> {
+			if (rs.next()) {
+				return Optional.ofNullable(rse.extractData(rs));
+			} else {
+				return Optional.empty();
+			}
+		});
+	}
+
+	@Override
+	public <T> List<T> queryList(String sql, final RowMapper<T> rowMapper) throws DataAccessException {
+		return query(sql, rs -> {
+			List<T> resultList;
+			int rowNum = 0;
+			if (rs.next()) {
+				resultList = new ArrayList<>();
+
+				do {
+					resultList.add(rowMapper.mapRow(rs, rowNum++));
+				} while (rs.next());
+			} else {
+				resultList = Collections.emptyList();
+			}
+
+			return resultList;
+		});
+	}
+
+	@Override
+	public Map<String, Object> queryForMap(String sql) throws DataAccessException {
+		return query(sql, rs -> {
+			if (rs.next()) {
+				ResultSetMetaData metaData = rs.getMetaData();
+				int columnCount = metaData.getColumnCount();
+
+				return rowToMap(columnCount, metaData, rs);
+			} else {
+				return Collections.emptyMap();
+			}
+		});
+	}
+
+	@Override
+	public List<Map<String, Object>> queryForMapList(String sql) throws DataAccessException {
+		return query(sql, rs -> {
+			List<Map<String, Object>> resultList;
+
+			if (rs.next()) {
+				resultList = new ArrayList<>();
+
+				ResultSetMetaData metaData = rs.getMetaData();
+				int columnCount = metaData.getColumnCount();
+
+				do {
+					resultList.add(rowToMap(columnCount, metaData, rs));
+				} while (rs.next());
+			} else {
+				resultList = Collections.emptyList();
+			}
+
+			return resultList;
+		});
+	}
+
+	@Override
+	public int update(String sql) throws DataAccessException {
+		XLog.debug(DBG_SQL_INFO, sql);
+
+		Connection connection = openConnection();
+		Statement statement = null;
+		try {
+			statement = connection.createStatement();
+			int rows = statement.executeUpdate(sql);
+			XLog.debug("Affected {0} rows", rows);
+			return rows;
+		} catch (SQLException e) {
+			XLog.error("Error execute SQL: {0}", e.getMessage(), e);
+			return 0;
+		} finally {
+			closeStatement(statement);
+			closeConnection(connection);
+		}
+	}
+
+	private Connection openConnection() {
+		try {
+			return getDataSource().getConnection();
+		} catch (SQLException ex) {
+			throw new CannotGetJdbcConnectionException("Could not get JDBC Connection", ex);
+		}
+	}
+
+	private String lookupColumnName(ResultSetMetaData resultSetMetaData, int columnIndex) throws SQLException {
+		String name = resultSetMetaData.getColumnLabel(columnIndex);
+		if (name == null || name.isEmpty()) {
+			name = resultSetMetaData.getColumnName(columnIndex);
+		}
+		return name;
+	}
+
+	private Map<String, Object> rowToMap(int columnCount, ResultSetMetaData metaData, ResultSet rs) throws SQLException {
+		Map<String, Object> rowMap = new LinkedHashMap<>(columnCount);
+
+		for (int i = 1; i <= columnCount; i++) {
+			String key = lookupColumnName(metaData, i);
+			Object value = getResultSetRawValue(rs, i);
+			rowMap.put(key, value);
+		}
+
+		return rowMap;
+	}
+
+	private Object getResultSetRawValue(ResultSet resultSet, int index) throws SQLException {
+		Object obj = resultSet.getObject(index);
+		if (obj == null) {
+			return null;
+		}
+
+		String className = obj.getClass().getName();
+
+		if (obj instanceof Blob) {
+			Blob blob = (Blob) obj;
+			obj = blob.getBytes(1, (int) blob.length());
+		} else if (obj instanceof Clob) {
+			Clob clob = (Clob) obj;
+			obj = clob.getSubString(1, (int) clob.length());
+		} else if ("oracle.sql.TIMESTAMP".equals(className) || "oracle.sql.TIMESTAMPTZ".equals(className)) {
+			obj = resultSet.getTimestamp(index);
+		} else if (className.startsWith("oracle.sql.DATE")) {
+			String metaDataClassName = resultSet.getMetaData().getColumnClassName(index);
+			if ("java.sql.Timestamp".equals(metaDataClassName) || "oracle.sql.TIMESTAMP".equals(metaDataClassName)) {
+				obj = resultSet.getTimestamp(index);
+			} else {
+				obj = resultSet.getDate(index);
+			}
+		} else if (obj instanceof Date
+				&& "java.sql.Timestamp".equals(resultSet.getMetaData().getColumnClassName(index))) {
+			obj = resultSet.getTimestamp(index);
+		}
+
+		return obj;
+	}
+
+	private void closeResultSet(ResultSet resultSet) {
+		if (resultSet != null) {
+			try {
+				resultSet.close();
+			} catch (SQLException e) {
+				XLog.debug("Could not close JDBC ResultSet", e);
+			} catch (Exception e) {
+				XLog.debug("Unexpected exception on closing JDBC ResultSet", e);
+			}
+		}
+	}
+
+	private void closeStatement(Statement statement) {
+		if (statement != null) {
+			try {
+				statement.close();
+			} catch (SQLException e) {
+				XLog.debug("Could not close JDBC Statement", e);
+			} catch (Exception e) {
+				XLog.debug("Unexpected exception on closing JDBC Statement", e);
+			}
+		}
+	}
+
+	private void closeConnection(Connection con) {
+		if (con == null) {
+			return;
+		}
+
+		try {
+			con.close();
+		} catch (SQLException e) {
+			XLog.debug("Could not close JDBC Connection", e);
+		} catch (Exception e) {
+			XLog.debug("Unexpected exception on closing JDBC Connection", e);
+		}
+	}
+}

tools/src/main/java/ghast/database/ResultSetExtractor.java

@@ -0,0 +1,9 @@
+package ghast.database;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public interface ResultSetExtractor<T> {
+
+	T extractData(ResultSet rs) throws SQLException, DataAccessException;
+}

tools/src/main/java/ghast/database/RowMapper.java

@@ -0,0 +1,9 @@
+package ghast.database;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public interface RowMapper<T> {
+
+	T mapRow(ResultSet rs, int rowNum) throws SQLException;
+}

tools/src/main/java/ghast/scheduler/BukkitScheduleTask.java

@@ -0,0 +1,33 @@
+package ghast.scheduler;
+
+import lombok.RequiredArgsConstructor;
+import org.bukkit.scheduler.BukkitTask;
+
+import java.util.function.Supplier;
+
+@RequiredArgsConstructor
+public class BukkitScheduleTask implements ScheduleTask {
+
+	private final Supplier<BukkitTask> generator;
+	private BukkitTask bukkitTask;
+
+	@Override
+	public void start() {
+		if (isCanceled()) {
+			bukkitTask = generator.get();
+		}
+	}
+
+	@Override
+	public boolean isCanceled() {
+		return bukkitTask == null || bukkitTask.isCancelled();
+	}
+
+	@Override
+	public void cancel() {
+		if (bukkitTask != null) {
+			bukkitTask.cancel();
+			bukkitTask = null;
+		}
+	}
+}

tools/src/main/java/ghast/scheduler/JavaScheduleTask.java

@@ -0,0 +1,33 @@
+package ghast.scheduler;
+
+import lombok.RequiredArgsConstructor;
+
+import java.util.concurrent.Future;
+import java.util.function.Supplier;
+
+@RequiredArgsConstructor
+public class JavaScheduleTask implements ScheduleTask {
+
+	private final Supplier<Future<?>> generator;
+	private Future<?> future;
+
+	@Override
+	public void start() {
+		if (future == null || future.isDone()) {
+			future = generator.get();
+		}
+	}
+
+	@Override
+	public boolean isCanceled() {
+		return future == null || future.isCancelled();
+	}
+
+	@Override
+	public void cancel() {
+		if (future != null) {
+			future.cancel(true);
+			future = null;
+		}
+	}
+}

tools/src/main/java/ghast/scheduler/ScheduleManager.java

@@ -0,0 +1,113 @@
+package ghast.scheduler;
+
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
+import ghast.GhastTools;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import lombok.experimental.UtilityClass;
+import org.bukkit.Bukkit;
+import org.bukkit.scheduler.BukkitScheduler;
+
+import java.util.concurrent.*;
+
+@UtilityClass
+@SuppressWarnings("unused")
+public class ScheduleManager {
+
+	private static final ThreadFactory THREAD_FACTORY = new ThreadFactoryBuilder()
+			.setNameFormat("ScheduleManager-Thread-%d")
+			.setDaemon(true)
+			.build();
+
+	public Builder createTask() {
+		return new Builder();
+	}
+
+	@NoArgsConstructor(access = AccessLevel.PRIVATE)
+	public static class Builder {
+
+		private static final long MS_PER_ONE_TICK = 1000L/*one second by ms*/ / 20L/*tick per second*/;
+		private boolean useBukkitScheduler = false;
+		private Long afterMs;
+		private Long everyMs;
+
+		public Builder useBukkitScheduler() {
+			this.useBukkitScheduler = true;
+			return this;
+		}
+
+		public Builder after(long value, TimeUnit unit) {
+			this.afterMs = unit.toMillis(value);
+			return this;
+		}
+
+		public Builder every(long value, TimeUnit unit) {
+			this.everyMs = unit.toMillis(value);
+			return this;
+		}
+
+		public ScheduleTask create(Runnable runnable) {
+			if (useBukkitScheduler) {
+				return createBukkitSchedule(runnable);
+			} else {
+				return createSchedule(runnable);
+			}
+		}
+
+		public ScheduleTask execute(Runnable runnable) {
+			ScheduleTask scheduleTask = create(runnable);
+			scheduleTask.start();
+			return scheduleTask;
+		}
+
+		private ScheduleTask createBukkitSchedule(Runnable runnable) {
+			BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
+			BukkitScheduleTask resultTask;
+
+			if (this.afterMs == null && this.everyMs == null) {
+				resultTask = new BukkitScheduleTask(() -> bukkitScheduler.runTask(GhastTools.getPlugin(), runnable));
+			} else if (this.everyMs != null) {
+				long everyTicks = this.everyMs / MS_PER_ONE_TICK;
+				long afterTicks = this.afterMs != null ? this.afterMs / MS_PER_ONE_TICK : 0;
+				resultTask = new BukkitScheduleTask(() ->
+						bukkitScheduler.runTaskTimer(GhastTools.getPlugin(), runnable, afterTicks, everyTicks));
+			} else {
+				long ticks = this.afterMs / MS_PER_ONE_TICK;
+				resultTask = new BukkitScheduleTask(() ->
+						bukkitScheduler.runTaskLater(GhastTools.getPlugin(), runnable, ticks));
+			}
+
+			return resultTask;
+		}
+
+		private ScheduleTask createSchedule(Runnable runnable) {
+			ExecutorService executorService;
+			JavaScheduleTask resultTask;
+
+			if (this.afterMs == null && this.everyMs == null) {
+				executorService = Executors.newSingleThreadExecutor(THREAD_FACTORY);
+				resultTask = new JavaScheduleTask(() -> executorService.submit(runnable));
+			} else if (this.everyMs != null) {
+				ScheduledExecutorService scheduledExecutorService
+						= Executors.newScheduledThreadPool(1, THREAD_FACTORY);
+
+				resultTask = new JavaScheduleTask(() ->
+						scheduledExecutorService.scheduleAtFixedRate(runnable,
+								this.afterMs != null ? this.afterMs : 0,
+								everyMs, TimeUnit.MILLISECONDS));
+
+				executorService = scheduledExecutorService;
+			} else {
+				ScheduledExecutorService scheduledExecutorService
+						= Executors.newScheduledThreadPool(1, THREAD_FACTORY);
+
+				resultTask = new JavaScheduleTask(() ->
+						scheduledExecutorService.schedule(runnable, afterMs, TimeUnit.MILLISECONDS));
+				executorService = scheduledExecutorService;
+			}
+
+			executorService.shutdown();
+			return resultTask;
+		}
+	}
+}

tools/src/main/java/ghast/scheduler/ScheduleTask.java

@@ -0,0 +1,10 @@
+package ghast.scheduler;
+
+public interface ScheduleTask {
+
+	void start();
+
+	boolean isCanceled();
+
+	void cancel();
+}

tools/src/test/java/ghast/database/JdbcTemplateTest.java

@@ -0,0 +1,289 @@
+package ghast.database;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.Lists;
+import ghast.GhastTools;
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import org.bukkit.plugin.Plugin;
+import org.h2.jdbcx.JdbcDataSource;
+import org.junit.jupiter.api.*;
+
+import javax.sql.DataSource;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.text.MessageFormat;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.StringJoiner;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import static org.junit.jupiter.api.Assertions.*;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+class JdbcTemplateTest {
+
+	static final String JDBC_USER = "sa";
+	static final String JDBC_PASSWORD = "";
+	static final String JDBC_DB_NAME = "in_mem_db";
+	static final String JDBC_URL = "jdbc:h2:mem:" + JDBC_DB_NAME + ";DB_CLOSE_DELAY=-1";
+
+	static final String TABLE_NAME = "TEST_TABLE";
+	static final String COLUMN_ID = "ID";
+	static final String COLUMN_NAME = "C_NAME";
+	static final String COLUMN_VALUE = "C_VALUE";
+
+	static final Object[][] DATA = new Object[][]{
+			{ "Player 1", 100 }, { "Player 2", 250 },
+			{ "Player 3", 0 }, { "Player 4", 780 }
+	};
+
+	static DataSource dataSource;
+	JdbcTemplate jdbcTemplate;
+
+	@BeforeAll
+	static void beforeAll() {
+		Logger logger = Logger.getLogger(JdbcTemplateTest.class.getName());
+
+		Plugin mockPlugin = mock(Plugin.class);
+		when(mockPlugin.getLogger()).thenReturn(logger);
+
+		GhastTools.setPlugin(mockPlugin);
+
+		JdbcDataSource jdbcDataSource = new JdbcDataSource();
+		jdbcDataSource.setUser(JDBC_USER);
+		jdbcDataSource.setPassword(JDBC_PASSWORD);
+		jdbcDataSource.setURL(JDBC_URL);
+
+		dataSource = jdbcDataSource;
+	}
+
+	@BeforeEach
+	void before() {
+		jdbcTemplate = new JdbcTemplate(dataSource);
+		createTable();
+
+		String sql_head = MessageFormat.format("INSERT INTO {0} ({1}, {2}) VALUES ",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE);
+		StringJoiner sql_sj = new StringJoiner(", ");
+		for (Object[] datum : DATA) {
+			sql_sj.add(MessageFormat.format("( ''{0}'', {1} )", datum[0], datum[1]));
+		}
+
+		jdbcTemplate.execute(sql_head + sql_sj.toString());
+	}
+
+	@AfterEach
+	void after() {
+		dropTable();
+	}
+
+	@Test
+	void testQuery_Simple_Single() {
+		String sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Integer value = jdbcTemplate.query(sql, rs -> {
+			if (rs.next()) {
+				return rs.getInt(1);
+			} else {
+				return null;
+			}
+		});
+
+		assertEquals(DATA[0][1], value);
+	}
+
+	@Test
+	void testQuery_Simple_Optional() {
+		String sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Optional<Integer> optValue = jdbcTemplate.queryOne(sql, rs -> rs.getInt(1));
+
+		assertTrue(optValue.isPresent());
+		assertEquals(DATA[0][1], optValue.get());
+	}
+
+	@Test
+	void testQuery_Simple_List() {
+		String sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}'' OR {1} LIKE ''{4}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0], DATA[1][0]);
+
+		List<Integer> listValues = jdbcTemplate.queryList(sql, (rs, rowNum) -> rs.getInt(1));
+
+		assertIterableEquals(Lists.newArrayList(DATA[0][1], DATA[1][1]), listValues);
+	}
+
+	@Test
+	void testQuery_Object_Single() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Player actualPlayer = jdbcTemplate.query(sql, rs -> {
+			if (rs.next()) {
+				Player player0 = new Player();
+				player0.name = rs.getString(COLUMN_NAME);
+				player0.value = rs.getInt(COLUMN_VALUE);
+
+				return player0;
+			} else {
+				return null;
+			}
+		});
+
+		Player expectedPlayer = new Player();
+		expectedPlayer.name = (String) DATA[0][0];
+		expectedPlayer.value = (int) DATA[0][1];
+
+		assertEquals(expectedPlayer, actualPlayer);
+	}
+
+	@Test
+	void testQuery_Object_List() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0}",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE);
+
+		List<Player> actualPlayers = jdbcTemplate.queryList(sql, (rs, num) -> {
+			Player player0 = new Player();
+			player0.name = rs.getString(COLUMN_NAME);
+			player0.value = rs.getInt(COLUMN_VALUE);
+
+			return player0;
+		});
+
+
+		List<Player> expectedPlayers = Stream.of(DATA)
+				.map(datum -> {
+					Player player1 = new Player();
+					player1.name = (String) datum[0];
+					player1.value = (int) datum[1];
+
+					return player1;
+				})
+				.collect(Collectors.toList());
+
+
+		assertIterableEquals(expectedPlayers, actualPlayers);
+	}
+
+	@Test
+	void testQueryForMap() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, DATA[0][0]);
+
+		Map<String, Object> actualMap = jdbcTemplate.queryForMap(sql);
+
+		Map<String, Object> expectedMap = ImmutableMap.of(
+				COLUMN_NAME, DATA[0][0],
+				COLUMN_VALUE, DATA[0][1]);
+
+		assertIterableEquals(expectedMap.entrySet(), actualMap.entrySet());
+	}
+
+	@Test
+	void testQueryForMapList() {
+		String sql = MessageFormat.format("SELECT {1}, {2} FROM {0}",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE);
+
+		List<Map<String, Object>> actualMapList = jdbcTemplate.queryForMapList(sql);
+
+		List<Map<String, Object>> expectedMapList = Stream.of(DATA)
+				.map(datum -> ImmutableMap.of(COLUMN_NAME, datum[0], COLUMN_VALUE, datum[1]))
+				.collect(Collectors.toList());
+
+		assertIterableEquals(expectedMapList, actualMapList);
+
+	}
+
+	@Test
+	void testUpdate() {
+		String newName = "Player X";
+		String sql = MessageFormat.format("UPDATE {0} SET {1} = ''{3}'' WHERE {1} LIKE ''{2}''",
+				TABLE_NAME, COLUMN_NAME, DATA[0][0], newName);
+
+		int rows = jdbcTemplate.update(sql);
+
+		assertEquals(1, rows);
+
+		sql = MessageFormat.format("SELECT {2} FROM {0} WHERE {1} LIKE ''{3}''",
+				TABLE_NAME, COLUMN_NAME, COLUMN_VALUE, newName);
+
+		Integer value = jdbcTemplate.query(sql, rs -> {
+			if (rs.next()) {
+				return rs.getInt(1);
+			} else {
+				return null;
+			}
+		});
+
+		assertEquals(DATA[0][1], value);
+	}
+
+	private void createTable() {
+		jdbcTemplate.execute("CREATE TABLE " + TABLE_NAME + " (" +
+				COLUMN_ID + " bigint auto_increment," +
+				COLUMN_NAME + " varchar(16)," +
+				COLUMN_VALUE + " integer)");
+	}
+
+	private void dropTable() {
+		jdbcTemplate.execute("DROP TABLE IF EXISTS " + TABLE_NAME);
+	}
+
+	class Player {
+		String name;
+		int value;
+
+		@Override
+		public boolean equals(Object o) {
+			if (this == o) return true;
+			if (!(o instanceof Player)) return false;
+			Player player = (Player) o;
+			return new EqualsBuilder().append(value, player.value).append(name, player.name).isEquals();
+		}
+
+		@Override
+		public int hashCode() {
+			return new HashCodeBuilder(17, 37).append(name).append(value).toHashCode();
+		}
+	}
+
+	@Nested
+	class JdbcTemplateTest_ExecuteTestCase {
+
+		@BeforeEach
+		void before() {
+			jdbcTemplate = new JdbcTemplate(dataSource);
+			dropTable();
+		}
+
+		@AfterEach
+		void after() {
+			dropTable();
+		}
+
+		@Test
+		void test() throws ClassNotFoundException, IllegalAccessException, InstantiationException, SQLException {
+			createTable();
+
+			//region Check result
+			Class.forName("org.h2.Driver").newInstance();
+			Connection connection = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASSWORD);
+			ResultSet resultSet = connection.getMetaData().getTables(JDBC_DB_NAME.toUpperCase(), "PUBLIC",
+					TABLE_NAME.toUpperCase(), new String[]{"TABLE"});
+
+			assertTrue(resultSet.next());
+
+			resultSet.close();
+			connection.close();
+			//endregion
+		}
+	}
+}