refactor: support extending jar directories for plugin class loader

[guqing]

What type of PR is this?

/kind improvement
/area core
/milestone 2.2.x

What this PR does / why we need it:

修复引入外部依赖的插件以开发模式启动时会出现 NoClassDefFoundError 的问题
see #3107 for more detail.

Which issue(s) this PR fixes:

Fixes #3107

Special notes for your reviewer:

how to test it?
以插件 development 模式启动以下两个插件观察是否正常启动：

• https://github.com/halo-sigs/plugin-s3
• https://github.com/halo-sigs/plugin-alioss

期望没有 Caused by: java. lang. NoClassDefFoundEenon 错误，且插件正确启动。

/cc @halo-dev/sig-halo

Does this PR introduce a user-facing change?

修复引入外部依赖的插件以开发模式启动时会出现 NoClassDefFoundError 的问题

[ruibaby]

我这里依然无法启动，日志：

2023-01-08T21:18:48.996+08:00 ERROR 13737 --- [nReconciler-t-1] run.halo.app.plugin.HaloPluginManager    : Unable to start plugin 'PluginS3ObjectStorage@1.2.1-SNAPSHOT'

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'run.halo.s3os.S3OsAttachmentHandler': Lookup method resolution failed
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.checkLookupMethods(AutowiredAnnotationBeanPostProcessor.java:470) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:340) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1283) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1185) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:961) ~[spring-beans-6.0.3.jar:6.0.3]
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:915) ~[spring-context-6.0.3.jar:6.0.3]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584) ~[spring-context-6.0.3.jar:6.0.3]
	at run.halo.app.plugin.PluginApplicationInitializer.initApplicationContext(PluginApplicationInitializer.java:105) ~[main/:na]
	at run.halo.app.plugin.PluginApplicationInitializer.onStartUp(PluginApplicationInitializer.java:121) ~[main/:na]
	at run.halo.app.plugin.HaloPluginManager.doStartPlugin(HaloPluginManager.java:255) ~[main/:na]
	at run.halo.app.plugin.HaloPluginManager.startPlugin(HaloPluginManager.java:211) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.lambda$startPlugin$4(PluginReconciler.java:142) ~[main/:na]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.startPlugin(PluginReconciler.java:139) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcilePluginState(PluginReconciler.java:114) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.lambda$reconcile$0(PluginReconciler.java:64) ~[main/:na]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcile(PluginReconciler.java:58) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcile(PluginReconciler.java:42) ~[main/:na]
	at run.halo.app.extension.controller.DefaultController$Worker.run(DefaultController.java:163) ~[main/:na]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]
Caused by: java.lang.IllegalStateException: Failed to introspect Class [run.halo.s3os.S3OsAttachmentHandler] from ClassLoader [org.pf4j.PluginClassLoader@655a866b]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:483) ~[spring-core-6.0.3.jar:6.0.3]
	at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:320) ~[spring-core-6.0.3.jar:6.0.3]
	at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.checkLookupMethods(AutowiredAnnotationBeanPostProcessor.java:448) ~[spring-beans-6.0.3.jar:6.0.3]
	... 30 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/amazonaws/auth/AWSCredentials
	at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
	at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[na:na]
	at java.base/java.lang.Class.getDeclaredMethods(Class.java:2504) ~[na:na]
	at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:465) ~[spring-core-6.0.3.jar:6.0.3]
	... 32 common frames omitted
Caused by: java.lang.ClassNotFoundException: com.amazonaws.auth.AWSCredentials
	at org.pf4j.PluginClassLoader.loadClass(PluginClassLoader.java:144) ~[pf4j-3.8.0.jar:3.8.0]
	... 36 common frames omitted

2023-01-08T21:18:48.997+08:00 DEBUG 13737 --- [nReconciler-t-1] r.h.app.plugin.SpringComponentsFinder    : Removing components storage from cache [PluginS3ObjectStorage].
2023-01-08T21:18:48.997+08:00 ERROR 13737 --- [nReconciler-t-1] r.h.a.e.controller.DefaultController     : Reconciler in run.halo.app.core.extension.reconciler.PluginReconciler-worker-1 aborted with an error, re-enqueuing...

org.pf4j.PluginRuntimeException: Error creating bean with name 'run.halo.s3os.S3OsAttachmentHandler': Lookup method resolution failed
	at run.halo.app.core.extension.reconciler.PluginReconciler.handleStatus(PluginReconciler.java:195) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.lambda$startPlugin$4(PluginReconciler.java:143) ~[main/:na]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.startPlugin(PluginReconciler.java:139) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcilePluginState(PluginReconciler.java:114) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.lambda$reconcile$0(PluginReconciler.java:64) ~[main/:na]
	at java.base/java.util.Optional.ifPresent(Optional.java:178) ~[na:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcile(PluginReconciler.java:58) ~[main/:na]
	at run.halo.app.core.extension.reconciler.PluginReconciler.reconcile(PluginReconciler.java:42) ~[main/:na]
	at run.halo.app.extension.controller.DefaultController$Worker.run(DefaultController.java:163) ~[main/:na]
	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539) ~[na:na]
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) ~[na:na]
	at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]

[guqing]

我这里依然无法启动，日志：

你有配置了什么多余的配置吗，比如做了如下配置：

但是 lib-directories 的目录配置的不对之类的，lib-directories 默认就是 build/libs，不需要配置否则会覆盖默认值

[JohnNiang]

这个问题是 @pannanxu 首次发现的，请问 @pannanxu 这个修复能解决多模块的问题么？

[guqing]

我这里依然无法启动，日志：

dev profile 的 lib-directories 配置有点问题，我更新了，参考 de8489e

[ruibaby]

/lgtm

[pannanxu]

目前我测试的三个插件是可以启动成功的

接口调用也是没问题

配置如下

这个问题是 @pannanxu 首次发现的，请问 @pannanxu 这个修复能解决多模块的问题么？

[JohnNiang]

/approve

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