Logback Groovy配置和GraalVM

Question

我正在尝试使用groovy配置文件进行GraalVM编译的应用程序使用的logback。

当运行它并正常编译它时，一切都很好，但当我试图针对Graal进行编译时，我面临着一些我无法理解如何解决的问题。

因此，在没有任何特定配置传递给Graal的情况下，我在编译过程中遇到以下错误：

Caused by: com.oracle.graal.pointsto.constraints.UnsupportedFeatureException: No instances of net.logstash.logback.encoder.LogstashEncoder are allowed in the image heap as this class should be initialized at image runtime. Object has been initialized by the io.micr
onaut.runtime.Micronaut class initializer with a trace: 
        at net.logstash.logback.encoder.LogstashEncoder.<init>(LogstashEncoder.java:27)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.codehaus.groovy.reflection.CachedConstructor.invoke(CachedConstructor.java:80)
        at org.codehaus.groovy.reflection.CachedConstructor.doConstructorInvoke(CachedConstructor.java:74)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1732)
        at groovy.lang.MetaClassImpl.invokeConstructor(MetaClassImpl.java:1556)

我尝试了非常懒惰的方法，通过这样做来允许在构建期间初始化类：

——在构建时初始化=net。logstash。回复。编码器。LogstashEncoder

这只会导致其他各种与日志存储相关的类需要这个选项，所以我继续为整个包添加了一条规则，如下所示：

——在构建时初始化=net。logstash。回写

这并没有解决问题，但在编译过程中又导致了以下错误：

com.oracle.svm.core.util.UserError$UserException: Classes that should be initialized at run time got initialized during image building:
 ch.qos.logback.classic.gaffer.GafferConfigurator the class was requested to be initialized at build time (from the command line). ch.qos.logback.classic.gaffer.GafferConfigurator has been initialized without the native-image initialization instrumentation and the stack trace can't be tracked. Try avoiding to initialize the class that caused initialization of ch.qos.logback.classic.gaffer.GafferConfiguratorgroovy.lang.GroovySystem the class was requested to be initialized at build time (from the command line). io.micronaut.runtime.Micronaut caused initialization of this class with the following trace:
        at ch.qos.logback.classic.gaffer.GafferConfigurator.$getStaticMetaClass(GafferConfigurator.groovy)
        at ch.qos.logback.classic.gaffer.GafferConfigurator.<init>(GafferConfigurator.groovy)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at ch.qos.logback.classic.gaffer.GafferUtil.newGafferConfiguratorInstance(GafferUtil.java:52)
        at ch.qos.logback.classic.gaffer.GafferUtil.runGafferConfiguratorOn(GafferUtil.java:41)
        at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:67)
        at ch.qos.logback.classic.util.ContextInitializer.autoConfig(ContextInitializer.java:150)
        at org.slf4j.impl.StaticLoggerBinder.init(StaticLoggerBinder.java:84)
        at org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:55)
        at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
        at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
        at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:412)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:357)
        at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
        at io.micronaut.runtime.Micronaut.<clinit>(Micronaut.java:46)

我尝试了关于允许和不允许在构建或运行时初始化的各种规则排列，但都不起作用。

所以我的问题是，我该如何克服这一点？我试图找出导致初始化的类，但目前还无法做到这一点。

有人设法让logback使用groovy配置文件并成功编译成GraalVM映像吗？

Answer 1

由于Groovy的动态性，在GraalVM nativeimage上运行起来比较困难（但并非不可能）。我建议您通过跟踪代理运行应用程序，并查看需要什么反射配置才能获得日志。groovy文件操作。

将应用程序构建到JAR中，并使用以下方法运行应用程序：

java -agentlib:native-image-agent=config-output-dir=META-INF/native-image -jar build/myjar-all.jar

然后查看生成的reflect配置。json文件，用于获取与logback相关的条目，并将其包含在配置中。

或者，您可以使用logback来避免麻烦。xml