我使用javax.mail
库来发送可能包含或不包含附件的电子邮件。@GrabConfig的替代方案?
我还使用Groovy 2.0.6编写此脚本,并在Eclipse中开发它,并使用Gradle 1.5运行单元测试。我正在编写的脚本将在未来的许多不同位置部署到一个jar中。因此,需要从我的脚本引用javax.mail,而不是手动添加到机器的类路径中。
要做到这一点,我用我的脚本如下语句:
@GrabConfig(systemClassLoader=true)
@Grab(group='javax.mail', module='mail', version='1.4.7')
我的问题是,我无法同时包含在@GrabConfig语句摇篮运行单元测试。它只用@Grab语句就可以正常运行,但当@GrabConfig在那里时会失败。我收到的错误信息是:
:compileJava UP-TO-DATE
:compileGroovy
startup failed:
General error during conversion: No suitable ClassLoader found for grab
java.lang.RuntimeException: No suitable ClassLoader found for grab
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:77)
at org.codehaus.groovy.runtime.callsite.ConstructorSite$ConstructorSiteNoUnwrapNoCoerce.callConstructor(ConstructorSite.java:102)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallConstructor(CallSiteArray.java:57)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:182)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callConstructor(AbstractCallSite.java:190)
at groovy.grape.GrapeIvy.chooseClassLoader(GrapeIvy.groovy:181)
at groovy.grape.GrapeIvy$chooseClassLoader.callCurrent(Unknown Source)
at groovy.grape.GrapeIvy.grab(GrapeIvy.groovy:247)
at groovy.grape.Grape.grab(Grape.java:141)
at groovy.grape.GrabAnnotationTransformation.visit(GrabAnnotationTransformation.java:312)
at org.codehaus.groovy.transform.ASTTransformationVisitor$3.call(ASTTransformationVisitor.java:319)
at org.codehaus.groovy.control.CompilationUnit.applyToSourceUnits(CompilationUnit.java:903)
at org.codehaus.groovy.control.CompilationUnit.doPhaseOperation(CompilationUnit.java:566)
at org.codehaus.groovy.control.CompilationUnit.processPhaseOperations(CompilationUnit.java:542)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:519)
at org.codehaus.groovy.control.CompilationUnit.compile(CompilationUnit.java:498)
at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:118)
at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:39)
at org.gradle.api.internal.tasks.compile.daemon.CompilerDaemonServer.execute(CompilerDaemonServer.java:52)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:355)
at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
1 error
:compileGroovy FAILED
FAILURE: Build failed with an exception.
据No suitable classloader found for grab,@GrabConfig
使得代码不可测。
对于我的情况,有没有其他选择@GrabConfig
?
邮件JAR添加到类路径? – 2013-05-09 21:11:52
@tim_yates正如问题中所述,这不是我的情况的一种选择,因为jar会自动部署到不同的机器上,我需要javax.mail jar来引用和使用,而无需任何手动步骤。 – twbbas 2013-05-09 21:15:00