Gradle throws ClassNotFoundException依存関係を持つプラグインを使用

Question

同じルートフォルダ内のプロジェクトにコンパイル依存関係のあるGradleプラグインを使用すると、ClassNotFoundExceptionが発生しています。

ディレクトリ構造は、プラグインとそれを使用しますプロジェクトで、かなり単純です：

• ルート
  • buildSrc
  • demo-project

build.gradleには次のとおりです。

apply plugin: 'groovy' 

sourceCompatibility = 1.6 

repositories { 
    mavenCentral() 
} 

dependencies { 
    compile gradleApi() 
    compile localGroovy() 

    compile 'org.apache.commons:commons-configuration2:2.0' 
    compile 'commons-beanutils:commons-beanutils:1.9.2' 
} 

プラグイン自体が正しくビルドされています。

FAILURE: Build failed with an exception. 

* What went wrong: 
A problem occurred configuring project ':demo-project'. 
> java.lang.ClassNotFoundException: org.apache.commons.configuration2.PropertiesConfiguration 

ちょうど私を完了するために：私のdemo-projectにプラグインを適用することがcommons-configuration2依存関係を（そのプラグインはincriminatedラインで失敗するよりも、実行）を見つけることができないため、afterEvaluate一部に障害が発生した

問題は、ここでbuild.gradleです私demo-project：

apply plugin: 'java' 
apply plugin: 'com.sample.myplugin' 

thisIsMyPluginConfiguration { 
    something = 'here' 
} 

これは既知の問題ですか、私は使用することができます回避策はありますか？

Adding dependencies to a custom gradle pluginと関連している可能性があります。

EDIT：別の依存関係を指定しようとすると機能します。それは、犯人PropertiesConfigurationクラスがどのように読み込まれているかの問題のようです。フルスタックトレースは次のとおりです。

* Exception is: 
org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':demo-java'. 
     at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:79) 
     at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:74) 
     at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:61) 
     at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:510) 
     at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:90) 
     at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:47) 
     at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:35) 
     at org.gradle.initialization.DefaultGradleLauncher$2.run(DefaultGradleLauncher.java:125) 
     at org.gradle.internal.Factories$1.create(Factories.java:22) 
     at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) 
     at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52) 
     at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:122) 
     at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32) 
     at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:99) 
     at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93) 
     at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) 
     at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62) 
     at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93) 
     at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:82) 
     at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94) 
     at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28) 
     at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) 
     at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43) 
     at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28) 
     at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78) 
     at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:48) 
     at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51) 
     at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28) 
     at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43) 
     at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:170) 
     at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:237) 
     at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:210) 
     at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35) 
     at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24) 
     at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:206) 
     at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169) 
     at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33) 
     at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22) 
     at org.gradle.launcher.Main.doAction(Main.java:33) 
     at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45) 
     at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:54) 
     at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:35) 
     at org.gradle.launcher.GradleMain.main(GradleMain.java:23) 
     at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:30) 
     at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:129) 
     at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:61) 
Caused by: org.apache.commons.configuration2.ex.ConfigurationRuntimeException: java.lang.ClassNotFoundException: org.apache.commons.configuration2.PropertiesConfiguration 
     at org.apache.commons.configuration2.beanutils.BeanHelper.fetchBeanClass(BeanHelper.java:549) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.createBeanCreationContext(BeanHelper.java:616) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.createBean(BeanHelper.java:456) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.createBean(BeanHelper.java:479) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.createBean(BeanHelper.java:492) 
     at org.apache.commons.configuration2.builder.BasicConfigurationBuilder.createResultInstance(BasicConfigurationBuilder.java:447) 
     at org.apache.commons.configuration2.builder.BasicConfigurationBuilder.createResult(BasicConfigurationBuilder.java:417) 
     at org.apache.commons.configuration2.builder.BasicConfigurationBuilder.getConfiguration(BasicConfigurationBuilder.java:285) 
     at org.apache.commons.configuration2.builder.ConfigurationBuilder$getConfiguration.call(Unknown Source) 
     at com.novoda.buildproperties.BuildProperties.<init>(BuildProperties.groovy:23) 
     at com.novoda.buildproperties.BuildPropertiesPlugin$_apply_closure1.doCall(BuildPropertiesPlugin.groovy:17) 
     at org.gradle.listener.ClosureBackedMethodInvocationDispatch.dispatch(ClosureBackedMethodInvocationDispatch.java:40) 
     at org.gradle.listener.ClosureBackedMethodInvocationDispatch.dispatch(ClosureBackedMethodInvocationDispatch.java:25) 
     at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:44) 
     at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:79) 
     at org.gradle.internal.event.BroadcastDispatch.dispatch(BroadcastDispatch.java:30) 
     at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93) 
     at com.sun.proxy.$Proxy11.afterEvaluate(Unknown Source) 
     at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:67) 
     ... 44 more 
Caused by: java.lang.ClassNotFoundException: org.apache.commons.configuration2.PropertiesConfiguration 
     at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:828) 
     at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:894) 
     at org.apache.commons.lang3.ClassUtils.getClass(ClassUtils.java:877) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.loadClass(BeanHelper.java:507) 
     at org.apache.commons.configuration2.beanutils.BeanHelper.fetchBeanClass(BeanHelper.java:545) 
     ... 62 more 

Answer 1

ウェブの検索は、Gradleのは、プロセスを制御するために、カスタムクラスローダーを使用していることを示唆しました。ここで

ClassLoader gradleClassLoader = Thread.currentThread().getContextClassLoader() 
Thread.currentThread().setContextClassLoader(PropertiesConfiguration.class.getClassLoader()) 

methodThatUsesPropertiesConfiguration() 

Thread.currentThread().setContextClassLoader(gradleClassLoader) 

はのGradleのクラスローダのメカニズムに精通していない発見されるのをPropertiesConfigurationを有効に使用されるいくつかのコードがあり、これは他の人が共有することがあり波及効果を有することができます。ただし、この一時的な切り替え中に呼び出されたメソッドは、他のGradleの機能と相互作用しないため、比較的安全だと考えられます。