使用OSGi和Apache Felix iPOJO与JDK 11

Question

我有一个围绕OSGi和iPOJO构建的项目，我正在尝试确定它是否仍然适用于JDK 11.它目前正在使用JDK 8.由于iPOJO（1.12.1）的最新版本是最新版本，所以看起来并不太乐观。 2014年发布。更新目标和maven编译器版本后，我遇到以下问题：

[ERROR] Failed to execute goal org.apache.felix:maven-ipojo-plugin:1.12.1:ipojo-bundle (default) on project redacted: Execution default of goal org.apache.felix:maven-ipojo-plugin:1.12.1:ipojo-bundle failed. IllegalArgumentException -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.felix:maven-ipojo-plugin:1.12.1:ipojo-bundle (default) on project redacted: Execution default of goal org.apache.felix:maven-ipojo-plugin:1.12.1:ipojo-bundle failed.
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
        at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
        at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
        at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
        at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
        at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
        at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
        at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
        at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal org.apache.felix:maven-ipojo-plugin:1.12.1:ipojo-bundle failed.
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
        at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
        ... 20 more
Caused by: java.lang.IllegalArgumentException
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at org.objectweb.asm.ClassReader.<init>(Unknown Source)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.model.parser.AnnotationParser.read(AnnotationParser.java:32)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.MetaAnnotationBindingRegistry.createBindings(MetaAnnotationBindingRegistry.java:94)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.CompletableBindingRegistry.getBindings(CompletableBindingRegistry.java:45)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.CompletableBindingRegistry.getBindings(CompletableBindingRegistry.java:43)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.CompletableBindingRegistry.getBindings(CompletableBindingRegistry.java:43)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.Selection.list(Selection.java:129)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.registry.Selection.get(Selection.java:98)
        at org.apache.felix.ipojo.manipulator.metadata.annotation.MethodMetadataCollector.visitAnnotation(MethodMetadataCollector.java:69)
        at org.objectweb.asm.ClassReader.b(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.apache.felix.ipojo.manipulator.metadata.AnnotationMetadataProvider.computeAnnotations(AnnotationMetadataProvider.java:111)
        at org.apache.felix.ipojo.manipulator.metadata.AnnotationMetadataProvider.access$200(AnnotationMetadataProvider.java:44)
        at org.apache.felix.ipojo.manipulator.metadata.AnnotationMetadataProvider$1.visit(AnnotationMetadataProvider.java:90)
        at org.apache.felix.ipojo.manipulator.store.JarFileResourceStore.accept(JarFileResourceStore.java:161)
        at org.apache.felix.ipojo.manipulator.metadata.AnnotationMetadataProvider.getMetadatas(AnnotationMetadataProvider.java:75)
        at org.apache.felix.ipojo.manipulator.metadata.CompositeMetadataProvider.getMetadatas(CompositeMetadataProvider.java:53)
        at org.apache.felix.ipojo.manipulator.Pojoization.pojoization(Pojoization.java:360)
        at org.apache.felix.ipojo.manipulator.Pojoization.pojoization(Pojoization.java:243)
        at org.apache.felix.ipojo.plugin.ManipulatorMojo.execute(ManipulatorMojo.java:265)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
        ... 21 more

从粗略的一瞥，看起来maven-ipojo-plugin的asm依赖关系在使用JDK 11时遇到了麻烦，因为iPOJO对asm 5.0.4具有传递依赖性，并且直到asm才添加JDK 11支持7.0。 我试图排除传递依赖，并添加asm 7.0作为依赖，但我仍然得到相同的错误。

感谢您的关注，我会感谢任何其他尝试或见解的想法。

Answer 1

在maven构建期间来自ASM的IllegalArgumentException指示插件正在使用对于当前Java字节码而言太旧的ASM库的版本。 Java 11字节码需要ASM 7（正如您所提到的），它仅在几周前以稳定版本发布。

当从JDK 9迁移到10时，可以通过明确声明ASM 6.2作为对maven-shade-plugin的依赖来解决这个问题：

     <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-shade-plugin</artifactId>
        <version>3.1.1</version>
        <dependencies>
            <!-- TODO: Remove for shade-plugin 3.1.2 - https://issues.apache.org/jira/browse/MSHADE-289 -->
            <dependency>
                <groupId>org.ow2.asm</groupId>
                <artifactId>asm</artifactId>
                <version>6.2</version>
            </dependency>
        </dependencies>
    </plugin>

这个技巧对JDK 11没有用，它需要插件本身的更新，例如maven-shade-plugin和maven-plugin-plugin 。 正如您的努力所示， maven-ipojo-plugin 。 如果没有维护插件，您可能应该考虑使用ipojo-plugin的替代方法来迁移到Java 11。

您可以尝试将maven-compiler-plugin的target版本设置为1.8，这应该会使类文件与ipojo-plugin兼容。 但是，您可能还必须将source版本设置为1.8，并且无法使用任何Java 9+语言功能。