条件注册

自 v6.2.0 起

@ConditionalOnConfig 注解自 UltiTools-API v6.2.0 起可用。

UltiTools 允许你根据 YAML 配置值来条件性地注册组件。这让服主无需修改代码即可启用或禁用功能。

基本用法

在任意组件类（@Service、@CmdExecutor、@EventListener）上添加 @ConditionalOnConfig：

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.abstracts.command.BaseCommandExecutor;
import com.ultikits.ultitools.annotations.ConditionalOnConfig;
import com.ultikits.ultitools.annotations.command.CmdExecutor;
import org.bukkit.command.CommandSender;

@CmdExecutor(alias = {"warp"}, permission = "myplugin.command.warp")
@ConditionalOnConfig(value = "config/config.yml", path = "enableWarp")
public class WarpCommands extends BaseCommandExecutor {
    // Only registered if enableWarp: true in config.yml

    @Override
    protected void handleHelp(CommandSender sender) {
        sender.sendMessage("/warp");
    }
}

对应的 YAML 配置：

# config/config.yml
enableWarp: true

如果 enableWarp 为 false 或缺失，WarpCommands 类将完全不被注册——没有命令注册、没有内存占用、没有副作用。

注解属性

属性	类型	默认值	说明
value	String	（必填）	相对于插件数据目录的配置文件路径
path	String	（必填）	点分隔或斜杠分隔的 YAML 键路径
negate	boolean	false	如果为 true，在配置值为 false 时注册（反转逻辑）

示例

条件服务

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.annotations.ConditionalOnConfig;
import com.ultikits.ultitools.annotations.Scheduled;
import com.ultikits.ultitools.annotations.Service;

@Service
@ConditionalOnConfig(value = "config/config.yml", path = "economy.enabled")
public class EconomyService {

    @Scheduled(period = 36000, async = true)
    public void distributeTax() {
        // Only runs if economy.enabled: true
    }
}

条件事件监听器

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.annotations.ConditionalOnConfig;
import com.ultikits.ultitools.annotations.EventListener;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

@EventListener
@ConditionalOnConfig(value = "config/config.yml", path = "welcomeMessage.enabled")
public class WelcomeListener implements Listener {

    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent event) {
        event.getPlayer().sendMessage("Welcome to the server!");
    }
}

嵌套配置键

使用点号或斜杠来访问嵌套键：

# config/config.yml
features:
  teleport:
    enabled: true
  pvp:
    enabled: false

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.abstracts.command.BaseCommandExecutor;
import com.ultikits.ultitools.annotations.ConditionalOnConfig;
import com.ultikits.ultitools.annotations.command.CmdExecutor;
import org.bukkit.command.CommandSender;

@CmdExecutor(alias = {"tp"}, permission = "myplugin.teleport")
@ConditionalOnConfig(value = "config/config.yml", path = "features.teleport.enabled")
public class TeleportCommands extends BaseCommandExecutor {

    @Override
    protected void handleHelp(CommandSender sender) {
        sender.sendMessage("/tp");
    }
}

反转逻辑（negate）

使用 negate = true 在配置值为 false 时注册组件：

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.annotations.ConditionalOnConfig;
import com.ultikits.ultitools.annotations.Service;

@Service
@ConditionalOnConfig(value = "config/config.yml", path = "maintenance", negate = true)
public class NormalModeService {
    // Only active when maintenance: false (or missing)
}

完整示例

通过配置控制可选功能的插件：

# config/config.yml
features:
  home: true
  warp: true
  economy: false
  welcome: true

package com.ultikits.docs.conditional;

import com.ultikits.ultitools.abstracts.UltiToolsPlugin;
import com.ultikits.ultitools.annotations.UltiToolsModule;

@UltiToolsModule(scanBasePackages = {"com.ultikits.docs.conditional"})
public class MyPlugin extends UltiToolsPlugin {
    @Override
    public boolean registerSelf() { return true; }

    @Override
    public void unregisterSelf() { }
}

@CmdExecutor(alias = {"home"}, permission = "myplugin.home")
@ConditionalOnConfig(value = "config/config.yml", path = "features.home")
public class HomeCommands extends BaseCommandExecutor {
    // 已注册（features.home = true）

    @Override
    protected void handleHelp(CommandSender sender) { }
}

@CmdExecutor(alias = {"warp"}, permission = "myplugin.warp")
@ConditionalOnConfig(value = "config/config.yml", path = "features.warp")
public class WarpCommands extends BaseCommandExecutor {
    // 已注册（features.warp = true）

    @Override
    protected void handleHelp(CommandSender sender) { }
}

@Service
@ConditionalOnConfig(value = "config/config.yml", path = "features.economy")
public class EconomyService {
    // 未注册（features.economy = false）
}

@EventListener
@ConditionalOnConfig(value = "config/config.yml", path = "features.welcome")
public class WelcomeListener implements Listener {
    // 已注册（features.welcome = true）
}

v6.2.0 之前

没有 @ConditionalOnConfig 时，开发者需要在 registerSelf() 中手动检查配置值，并使用 if 语句条件性地注册组件。注解方式更简洁，消除了样板代码。

贡献者

Ling Bao

Claude Fable 5.1