扩展“战争"任务的自定义gradle任务看不到某些必需的类 [英] Custom gradle task extending the 'War' task does not see some required classes
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问题描述
我已经尝试移至Gradle一段时间了.我要做的一件事是根据通常会添加的条目在WAR文件中自动创建其他条目.出于性能和其他原因，我尝试通过在War任务的自定义子类中自动执行此操作来实现与以前相同的操作.由于我必须解决私人可见性和最终领域的问题，因此这并没有我想要的好，但是在开始之前它就失败了.从org.apache.tools.zip包中添加对类的引用的那一刻，构建在运行时因以下堆栈跟踪而失败:
I've been trying to move to Gradle for some time now. One of the things I have to do is automatically create additional entries in the WAR file based on those that would normally be added. For performance and other reasons I attempted to do this the same way it was done before by automating this inside a custom subclass of the War task. As I have to work around private visibility and final fields this is not as nice as I wanted, but it fails before it starts. The moment I added references to classes from the org.apache.tools.zip package, the build fails at runtime with the following stack trace:
17:44:32.888 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
17:44:32.900 [ERROR] [org.gradle.BuildExceptionReporter]
17:44:32.907 [ERROR] [org.gradle.BuildExceptionReporter] * Where:
17:44:32.914 [ERROR] [org.gradle.BuildExceptionReporter] Build file '...\build.gradle' line: 92
17:44:32.921 [ERROR] [org.gradle.BuildExceptionReporter]
17:44:32.928 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
17:44:32.935 [ERROR] [org.gradle.BuildExceptionReporter] A problem occurred evaluating root project '...'.
17:44:32.942 [ERROR] [org.gradle.BuildExceptionReporter] > Could not generate a proxy class for class ....ProblemWarTask.
17:44:32.953 [ERROR] [org.gradle.BuildExceptionReporter]
17:44:32.960 [ERROR] [org.gradle.BuildExceptionReporter] * Exception is:
17:44:32.969 [ERROR] [org.gradle.BuildExceptionReporter] org.gradle.api.GradleScriptException: A problem occurred evaluating root project '...'.
17:44:32.976 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:54)
17:44:32.983 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:127)
17:44:32.991 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.BuildScriptProcessor.evaluate(BuildScriptProcessor.java:38)
17:44:32.998 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:44)
17:44:33.005 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:464)
17:44:33.013 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.AbstractProject.evaluate(AbstractProject.java:77)
17:44:33.020 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.DefaultBuildConfigurer$ConfigureProject.execute(DefaultBuildConfigurer.java:38)
17:44:33.027 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.DefaultBuildConfigurer$ConfigureProject.execute(DefaultBuildConfigurer.java:36)
17:44:33.034 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.AbstractProject.configure(AbstractProject.java:440)
17:44:33.041 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.AbstractProject.allprojects(AbstractProject.java:435)
17:44:33.048 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:32)
17:44:33.055 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:142)
17:44:33.062 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:113)
17:44:33.069 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:81)
17:44:33.077 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.ExecuteBuildAction.run(ExecuteBuildAction.java:38)
17:44:33.086 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:39)
17:44:33.095 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.exec.InProcessGradleLauncherActionExecuter.execute(InProcessGradleLauncherActionExecuter.java:25)
17:44:33.103 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:50)
17:44:33.112 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.Actions$RunnableActionAdapter.execute(Actions.java:171)
17:44:33.121 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:201)
17:44:33.130 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:174)
17:44:33.139 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:170)
17:44:33.148 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:139)
17:44:33.157 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
17:44:33.166 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
17:44:33.175 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.Main.doAction(Main.java:48)
17:44:33.182 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
17:44:33.190 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.Main.main(Main.java:39)
17:44:33.197 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:50)
17:44:33.206 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:32)
17:44:33.216 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.launcher.GradleMain.main(GradleMain.java:26)
17:44:33.227 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: org.gradle.api.GradleException: Could not generate a proxy class for class ....ProblemWarTask.
17:44:33.238 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.AbstractClassGenerator.generate(AbstractClassGenerator.java:201)
17:44:33.249 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.TaskFactory.createTaskObject(TaskFactory.java:105)
17:44:33.258 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.TaskFactory.createTask(TaskFactory.java:70)
17:44:33.266 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory.createTask(AnnotationProcessingTaskFactory.java:93)
17:44:33.276 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.taskfactory.DependencyAutoWireTaskFactory.createTask(DependencyAutoWireTaskFactory.java:39)
17:44:33.285 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.tasks.DefaultTaskContainer.add(DefaultTaskContainer.java:56)
17:44:33.294 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.project.AbstractProject.task(AbstractProject.java:921)
17:44:33.301 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:216)
17:44:33.311 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.BeanDynamicObject.invokeMethod(BeanDynamicObject.java:122)
17:44:33.319 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.CompositeDynamicObject.invokeMethod(CompositeDynamicObject.java:147)
17:44:33.328 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.groovy.scripts.BasicScript.methodMissing(BasicScript.java:83)
17:44:33.335 [ERROR] [org.gradle.BuildExceptionReporter] at build_77lv568h8hqtuhsa63froq7bcr.run(...\build.gradle:92)
17:44:33.343 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:52)
17:44:33.352 [ERROR] [org.gradle.BuildExceptionReporter] ... 30 more
17:44:33.362 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.NoClassDefFoundError: Lorg/apache/tools/zip/ZipOutputStream;
17:44:33.370 [ERROR] [org.gradle.BuildExceptionReporter] at org.gradle.api.internal.AbstractClassGenerator.generate(AbstractClassGenerator.java:100)
17:44:33.379 [ERROR] [org.gradle.BuildExceptionReporter] ... 42 more
17:44:33.387 [ERROR] [org.gradle.BuildExceptionReporter] Caused by: java.lang.ClassNotFoundException: org.apache.tools.zip.ZipOutputStream
17:44:33.395 [ERROR] [org.gradle.BuildExceptionReporter] ... 43 more
17:44:33.403 [ERROR] [org.gradle.BuildExceptionReporter]
17:44:33.411 [LIFECYCLE] [org.gradle.BuildResultLogger]
17:44:33.419 [LIFECYCLE] [org.gradle.BuildResultLogger] BUILD FAILED
这仍然主要是关于Gradle的学习.我现在最大的问题实际上是不了解为什么会发生这种情况以及我总体上缺少什么(即是否/当我编写其他任务时).这如何顺利通过编译阶段(就可以很好地创建buildSrc.jar)，但是在运行时却失败了?
This is still mostly learning about Gradle. My biggest issue right now is actually not understanding why this happens and what am I missing in general (i.e. if/when I write other tasks). How come this passes the compilation stage just fine (buildSrc.jar is created just fine) but fails at runtime?
这是此代码的部分混淆(您将看到它主要是Gradle自己的代码的副本-即Zip任务):
Here's the slightly obfuscated source code of this (you'll see that it is mostly a copy of Gradle's own code - namely the Zip task):
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.lang.reflect.Constructor;
import org.apache.tools.zip.UnixStat;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;
import org.gradle.api.file.FileVisitDetails;
import org.gradle.api.GradleException;
import org.gradle.api.internal.file.archive.ZipCopyAction;
import org.gradle.api.internal.file.archive.ZipCopySpecVisitor;
import org.gradle.api.internal.file.copy.CopyAction;
import org.gradle.api.internal.file.copy.CopyActionImpl;
import org.gradle.api.internal.file.copy.CopySpecImpl;
import org.gradle.api.internal.file.copy.CopySpecVisitor;
import org.gradle.api.internal.file.copy.MappingCopySpecVisitor;
import org.gradle.api.internal.file.copy.NormalizingCopySpecVisitor;
import org.gradle.api.internal.file.copy.ReadableCopySpec;
import org.gradle.api.internal.file.copy.ZipCompressor;
import org.gradle.api.internal.file.copy.ZipDeflatedCompressor;
import org.gradle.api.internal.file.FileResolver;
import org.gradle.api.tasks.bundling.War;
import org.gradle.api.tasks.bundling.Zip;
import org.gradle.api.UncheckedIOException;
import org.gradle.internal.nativeplatform.filesystem.FileSystems;
class ProblemWarTask extends War {
private ZipCopyActionImpl copyAction = null;
public ProblemWarTask() {}
protected synchronized Zip.ZipCopyActionImpl getCopyAction() {
if (copyAction == null) {
copyAction = new ProblemWarCopyActionImpl(getServices().get(FileResolver.class));
}
return copyAction;
}
protected class ProblemWarCopyActionImpl extends Zip.ZipCopyActionImpl {
private final CopySpecVisitor visitor;
public ProblemWarCopyActionImpl(FileResolver fileResolver) {
super((FileResolver) fileResolver);
visitor = new MappingCopySpecVisitor(new NormalizingCopySpecVisitor(new ProblemWarCopySpecVisitor()), FileSystems.getDefault());
}
public void execute() {
visitor.startVisit(this);
for (ReadableCopySpec spec : getRootSpec().getAllSpecs()) {
visitor.visitSpec(spec);
spec.getSource().visit(visitor);
}
visitor.endVisit();
}
public boolean getDidWork() {
return visitor.getDidWork();
}
}
protected class ProblemWarCopySpecVisitor extends ZipCopySpecVisitor {
private ZipOutputStream zipOutStr;
private File zipFile;
public void startVisit(CopyAction action) {
ZipCopyAction archiveAction = (ZipCopyAction) action;
zipFile = archiveAction.getArchivePath();
try {
zipOutStr = archiveAction.getCompressor().createArchiveOutputStream(zipFile);
} catch (Exception e) {
throw new GradleException(String.format("Could not create ZIP '%s'.", zipFile), e);
}
}
public void endVisit() {
try {
zipOutStr.close();
} catch (IOException e) {
throw new UncheckedIOException(e);
} finally {
zipOutStr = null;
}
}
public void visitFile(FileVisitDetails fileDetails) {
try {
ZipEntry archiveEntry = new ZipEntry(fileDetails.getRelativePath().getPathString());
archiveEntry.setTime(fileDetails.getLastModified());
archiveEntry.setUnixMode(UnixStat.FILE_FLAG | fileDetails.getMode());
zipOutStr.putNextEntry(archiveEntry);
fileDetails.copyTo(zipOutStr);
zipOutStr.closeEntry();
} catch (Exception e) {
throw new GradleException(String.format("Could not add %s to ZIP '%s'.", fileDetails, zipFile), e);
}
// Now do a little more - add stuff
try {
if (...) {
byte[] buffer;
...
ZipEntry archiveEntry = new ZipEntry(secondPath);
archiveEntry.setTime(fileDetails.getLastModified());
archiveEntry.setUnixMode(UnixStat.FILE_FLAG | fileDetails.getMode());
zipOutStr.putNextEntry(archiveEntry);
zipOutStr.write(buffer, 0, buffer.length);
zipOutStr.closeEntry();
}
} catch (Exception e) {
throw new GradleException(String.format("Could not add secondary form of %s to ZIP '%s'.", fileDetails, zipFile), e);
}
}
public void visitDir(FileVisitDetails dirDetails) {
try {
// Trailing slash in name indicates that entry is a directory
ZipEntry archiveEntry = new ZipEntry(dirDetails.getRelativePath().getPathString() + '/');
archiveEntry.setTime(dirDetails.getLastModified());
archiveEntry.setUnixMode(UnixStat.DIR_FLAG | dirDetails.getMode());
zipOutStr.putNextEntry(archiveEntry);
zipOutStr.closeEntry();
} catch (Exception e) {
throw new GradleException(String.format("Could not add %s to ZIP '%s'.", dirDetails, zipFile), e);
}
}
}
}
目前构建脚本本身并没有做任何特别的事情:
Presently the build script itself is not doing anything special with it:
task war(type: ....ProblemWarTask) {
...
}
主体与我在战争"任务中使用的主体相同，甚至与我初次尝试使用该主体(ProblemWarTask)相同.当我向提到的软件包添加引用时，开始发生异常.令我困扰的是，当战争"任务的运行时依赖项与最终的运行时依赖项集相同时，如何才能正常运行.
The body is is the same as I used for the 'War' task and even for initial experimenting with this one (ProblemWarTask). Exception started happening when I added references to the package noted. What bothers me is how can a 'War' task run just fine when it has the same set of runtime dependencies as this one in the end.
这是Gradle 1.5附带的.我还尝试将以下内容添加到build.gradle中，但没有帮助(相同的错误):
This is with Gradle 1.5. I also tried adding the following to build.gradle but did not help (same error):
buildscript {
dependencies {
classpath files(".../gradle/lib/ant-1.8.4.jar")
}
}
编辑-使用Gradle 1.6进行了尝试，没有任何更改.也在Gradle论坛中发布:
Edit - tried with Gradle 1.6, no change. Posted in Gradle forums too:
编辑2 -可以在以下位置找到隔离的示例文件:
Edit 2 - isolated sample files can be found at:
http://wikisend.com/download/241430/sample.zip
推荐答案
像War这样的任务类型并非旨在由用户子类化.与其子类化和使用大量内部组件，不如编写一个插件(在最简单的情况下，这是另一个应用了apply from: "path/to/script.gradle"的构建脚本)来更好(更容易)，该插件使用其公共API预先配置任务.例如:
Task types like War aren't designed to be subclassed by users. Instead of subclassing and using lots of internals, it's often better (and easier) to write a plugin (which in the simplest case is just another build script applied with apply from: "path/to/script.gradle") that preconfigures tasks using their public API. For example:
tasks.withType(War) {
eachFile { FileCopyDetails details -> ... }
}
如果绝对必要，这样的配置也可以进入子类的构造函数中.
If absolutely necessary, such configuration can also go into the constructor of a subclass.
那就是说，我不确定为什么您遇到了Ant类的类加载器问题.如果您可以在 http://forums.gradle.org 上提交具有独立的可复制示例的问题，我们看看.
That said, I'm not sure why you are hitting a class loader problem with an Ant class. If you can submit an issue with a self-contained reproducible example at http://forums.gradle.org, we'll have a look.
这篇关于扩展“战争"任务的自定义gradle任务看不到某些必需的类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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