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Update JVMPlugin-Debug.md
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@ -66,6 +66,71 @@ fun onEnable() {
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}
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```
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## 使用依赖库后无法加载插件 / clinit 无法使用依赖库
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错误类似
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```log
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2023-12-08 00:23:42 E/main: Failed to init MiraiConsole.
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net.mamoe.mirai.console.internal.util.ServiceLoadException: Could not load service com.example.exmapleplugin.MyPlugin
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at ....
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Caused by: java.lang.NoClassDefFoundError: com/example/somelibrary/ClassFromLibrary
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at java.base/java.lang.Class.forName0(Native Method)
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at java.base/java.lang.Class.forName(Class.java:467)
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at net.mamoe.mirai.console.internal.util.PluginServiceHelper.loadService(PluginServiceHelper.kt:51)
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Caused by: java.lang.NoClassDefFoundError: org/quartz/SchedulerException
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... 23 more
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Caused by: java.lang.ClassNotFoundException: com/example/somelibrary/ClassFromLibrary
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at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
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at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
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Caused by: java.lang.ClassNotFoundException: com.example.somelibrary.ClassFromLibrary
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at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
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at net.mamoe.mirai.console.internal.plugin.JvmPluginClassLoaderN.loadClass(JvmPluginClassLoader.kt:389)
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... 26 more
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```
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此原因是因为 clinit 阶段时 mirai-console 还未加载依赖库至插件类搜索路径中。
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如果您使用 mirai-console 2.16.0+
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请创建 `plugin.yml`, mirai-console 才能将依赖库在 clinit 阶段前加载到插件类搜索路径,见 [JVMPlugin - 通过资源文件提供静态信息](./JVMPlugin.md#%E9%80%9A%E8%BF%87%E8%B5%84%E6%BA%90%E6%96%87%E4%BB%B6%E6%8F%90%E4%BE%9B%E9%9D%99%E6%80%81%E4%BF%A1%E6%81%AF)
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如果您使用 mirai-console 2.160 之前的版本, 请创建一个新的类,此类不要包含依赖库的代码,然后将此类的代码转移到您的真正的逻辑代码
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示例
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```kotlin
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object OuterPlugin: KotlinPlugin(...) {
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override fun onEnable() {
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ActuallyPluginClassLoader.onEnable()
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}
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}
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object ActuallyPluginClassLoader {
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fun onEnable() {
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// .....
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}
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}
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```
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> 底层分析
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>
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> 为了实现插件之间的相互依赖,mirai-console 必须获取到插件的信息 (PluginDescription) 才能进行插件类路径链接操作
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>
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> 在 mirai-console 2.16.0 之前,插件加载顺序为
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>
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> - 加载插件主类 (即 clinit 阶段)
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> - 加载插件实例 (传递 PluginDescription 给 mirai-console)
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> - mirai-console 构建插件依赖关系,链接插件类路径
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> - 执行插件的 onEnable
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>
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> 在 2.16.0+, 存在 plugin.yml 时, 插件加载的顺序为
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>
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> - 加载 plugin.yml
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> - 构建插件依赖关系,链接插件类路径
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> - 加载插件主类
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> - 加载插件实例
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> - 执行 onEnable
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## java.lang.LinkageError: loader constraint violation
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```log
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