无法在Karaf OSGi中加载ScriptEngineManager和ScriptEngine(找不到Nashorn) [英] ScriptEngineManager and ScriptEngine can not be loaded in Karaf OSGi (Nashorn not found)

问题描述

我正在尝试使用ScriptEngineManager和ScriptEngine用Java执行一些JavaScript代码.我使用Java 8，并且正在Karaf OSGi下执行此代码.

我使用的示例在示例Java类中运行良好，但是将其打包到包中会出现此错误ScriptEngineManager providers.next(): javax.script.ScriptEngineFactory: Provider jdk.nashorn.api.scripting.NashornScriptEngineFactory not found

当我查看包的标题时，我发现包导入了javax.script,被调用类的包，但似乎找不到(nashorn)提供程序.

谢谢

解决方案

转到文件 etc/config.properties (位于Karaf安装程序中)，找到配置属性 org.osgi. framework.bootdelegation 并向其中添加jdk.nashorn.*.完整的配置将如下所示:

org.osgi.framework.bootdelegation=org.apache.karaf.jaas.boot,org.apache.karaf.jaas.boot.principal,sun.*,com.sun.*,javax.transaction,javax.transaction.*,javax.xml.crypto,javax.xml.crypto.*,org.apache.xerces.jaxp.datatype,org.apache.xerces.stax,org.apache.xerces.parsers,org.apache.xerces.jaxp,org.apache.xerces.jaxp.validation,org.apache.xerces.dom,sun.*,jdk.nashorn.*

错误已报告给Karaf社区.

编辑:如果您在测试中使用Pax Exam Container 4.x for Karaf，则不要忘记在测试容器的配置中添加org.ops4j.pax.exam.CoreOptions.bootDelegationPackage("jdk.nashorn.*").

I am trying to use ScriptEngineManager and ScriptEngine to execute some JavaScript code with Java. I use Java 8 I am executing this code under Karaf OSGi.

The example I used works fine in a sample Java Class, but packing it in a bundle gives me this error ScriptEngineManager providers.next(): javax.script.ScriptEngineFactory: Provider jdk.nashorn.api.scripting.NashornScriptEngineFactory not found

When I look to the headers of the bundle, I see that the bundle imports javax.script, the package of the called classes but it seems that (nashorn) the provider is not found.

Thanks

解决方案

Go to file etc/config.properties (located inside of Karaf installation), find configuration property org.osgi.framework.bootdelegation and add jdk.nashorn.* to it. Complete configuration will be like this:

org.osgi.framework.bootdelegation=org.apache.karaf.jaas.boot,org.apache.karaf.jaas.boot.principal,sun.*,com.sun.*,javax.transaction,javax.transaction.*,javax.xml.crypto,javax.xml.crypto.*,org.apache.xerces.jaxp.datatype,org.apache.xerces.stax,org.apache.xerces.parsers,org.apache.xerces.jaxp,org.apache.xerces.jaxp.validation,org.apache.xerces.dom,sun.*,jdk.nashorn.*

Bug is reported to Karaf community.

Edit: If you use Pax Exam Container 4.x for Karaf in your tests then don't forget to add org.ops4j.pax.exam.CoreOptions.bootDelegationPackage("jdk.nashorn.*") to the configuration of your test container.

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